Agreement No. CE 35/2006(CE)
Kai Tak Development Engineering Study
cum Design and Construction of Advance
Works
– Investigation, Design and Construction
Kai Tak Development
Environmental Monitoring & Audit Manual
Contents
2............ EM&A
on New distributor roads serving the planned KTD. 2-2
2.1 Introduction. 2-2
2.2 Air Quality Impact 2-2
2.3 Noise Impact 2-2
2.4 Water Quality Impact 2-2
2.5 Waste Management Implications. 2-2
2.6 Land Contamination Impact 2-2
2.7 Impact on Cultural Heritage. 2-2
2.8 Landscape and Visual Impact 2-2
List of
Tables
Table 2.1......... Proposed Air Quality
Monitoring Locations
Table 2.2......... Action and Limit Levels for Construction Dust Monitoring
Table 2.3......... Event and Action Plan for Construction Dust Monitoring
Table 2.4......... Noise Monitoring Stations
Table 2.5......... Action and Limit Levels for Construction Noise
Table 2.6......... Event/Action Plan for Construction Noise
Table 2.7......... Summary of Waste Handling Procedures and Disposal Routes
Table 2.8......... Monitoring Programme
Table 2.9......... Event and Action Plan for Landscape and Visual Impact
2
EM&A on New distributor roads serving the
planned KTD
2.1
Introduction
2.2
Air Quality Impact
2.2.1
Monitoring and audit of the TSP levels shall be
carried out during the construction phase by the ET to ensure that any
deteriorating air quality could be readily detected and timely action taken to
rectify the situation.
2.2.2
1-hour and 24-hour
average TSP levels shall be measured to indicate the impacts of construction
dust on air quality. The 24-hour average TSP levels shall be measured by
following the standard high volume sampling method as set out in the Title 40
of the United States Code of Federal Regulations, Chapter 1 (Part 50), Appendix B. Upon agreement from the Engineer’s
Representative (ER) and the IEC, 1-hour average TSP levels can be measured by
direct reading methods to indicate short-term impacts.
2.2.3
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, other local atmospheric factors affecting or affected by site conditions
and work progress of the concerned site etc. shall be recorded in detail.
A sample data record sheet based on the one presented in the EM&A
Guidelines for Development Projects in Hong Kong
is shown in Appendix B.
The ET Leader may modify the data record sheet for this EM&A programme, of
which the format should be agreed by the ER and the IEC.
Monitoring Equipment
2.2.4
High volume samplers (HVSs) in compliance with the following specifications shall
be used for carrying out the 1-hour and 24-hour TSP monitoring:
l 0.6 - 1.7 m3 per minute
(20 - 60 standard cubic feet per minute) adjustable flow range;
l Equipped with a timing / control
device with ± 5 minutes accuracy for 24 hours operation;
l Installed with elapsed-time meter
with ± 2 minutes accuracy for 24 hours operation;
l Capable of providing a minimum
exposed area of 406 cm2 ;
l Flow control accuracy: ± 2.5%
deviation over 24-hour sampling period;
l Equipped with a shelter to protect
the filter and sampler;
l Incorporated with an electronic mass
flow rate controller or other equivalent devices;
l Equipped with a flow recorder for
continuous monitoring;
l Provided with a peaked roof inlet;
l Incorporated with a manometer;
l Able to hold and seal the filter
paper to the sampler housing at horizontal position;
l Easy to change the filter;
l Capable of operating continuously
for 24-hour period.
2.2.5
The ET shall be
responsible for the provision of the monitoring equipment. The ET shall
provide sufficient number of HVSs with appropriate
calibration kit for carrying out the baseline, regular impacts 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 labelled.
2.2.6
Initial calibration of
the dust monitoring equipment shall be conducted upon installation and prior to
commissioning, and at bi-monthly intervals subsequently. The transfer
standard shall be traceable to the internationally recognised primary standard
and be calibrated annually. The calibration data shall be properly
documented for future reference by the concerned parties such as the IEC.
All the data shall be converted into standard temperature and pressure condition.
2.2.7
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 on the data sheet as shown in Appendix B.
2.2.8
If the ET proposes to
use a direct reading dust meter to measure 1-hour average TSP levels, he/she
shall submit sufficient information to the ER and the IEC to prove that the
instrument is capable of achieving a comparable result as that of the HVS
before it may be used for the monitoring works. The instrument shall also
be calibrated regularly, and the 1-hour sampling shall be determined
periodically by HVS to check the validity and accuracy of the results measured by
direct reading method.
2.2.9
Wind data monitoring
equipment shall also be provided by the ET and set up at conspicuous locations
for logging wind speed and wind direction near to the dust monitoring
locations. The equipment installation location shall be proposed by the
ET and agreed with the ER in consultation with the IEC. For installation
and operation of wind data monitoring equipment, the following points shall be
observed:
(i) The wind sensors shall be installed
10m above ground so that they are clear of obstructions or turbulence caused by
the buildings;
(ii)
The wind data shall be
captured by a data logger. The data shall be downloaded for analysis at least
once a month;
(iii)
The wind data
monitoring equipment shall be re-calibrated at least once every six months; and
(iv)
Wind direction should
be divided into 16 sectors of 22.5 degrees each.
2.2.10 In exceptional situations, the ET
may propose alternative methods to obtain representative wind data upon
approval from the ER and agreement from the IEC.
Laboratory Measurement / Analysis
2.2.11 A clean laboratory with constant
temperature and humidity control and equipped with necessary measuring and
conditioning instruments to handle the dust samples collected, shall be
available for sample analysis, and equipment calibration and maintenance.
The laboratory shall be HOKLAS accredited or other internationally accredited
laboratory.
2.2.12 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 IEC. Measurement performed by the
laboratory shall be demonstrated to the satisfaction of the IEC.
2.2.13 The IEC shall conduct regular audit
of the measurement performed by the laboratory so as to ensure the accuracy of
measurement results. The ET shall provide the ER and the IEC with one
copy of the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50),
Appendix B for their reference.
2.2.14 Filter paper of size
8"x10" 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-hour and be pre-weighed before use for
the sampling.
2.2.15 After sampling, the filter paper
loaded with dust shall be kept in a clean and tightly sealed 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 a readout
down to 0.1mg. The balance shall be regularly calibrated against a traceable
standard.
2.2.16 All the collected samples shall be
kept in a good condition for 6 months before disposal.
2.2.17 The proposed dust monitoring locations
are shown in Figure 2.1.
The selected monitoring locations are the ASRs located near to the construction
site(s) of this DP. The proposed air quality monitoring locations are
listed in Table 2.1 below.
Table 2.1
Proposed Air Quality Monitoring Locations
Location
|
ASR ID
in EIA
|
Description
|
AM1
|
A29
|
Rhythm Garden
|
AM2
|
A32
|
Lee Kau Yan Memorial School
|
AM3
|
A40
|
Sky Tower
|
AM4
|
A47
|
Grand Waterfront
|
AM5
|
A58
|
CCC Kei To Secondary School
|
AM6
|
PA15
|
Site 1B4 (Planned)
|
2.2.18
The status and locations
of the ASRs may change after issuing this Manual. The ET shall propose
updated monitoring locations and seek approval from EPD, and agreement from the
ER and the IEC before baseline monitoring commences.
2.2.19
When alternative
monitoring locations are proposed, the following criteria, as far as
practicable, shall be followed:
(i)
At the site boundary or
such locations close to the major dust emission source;
(ii)
Close to the ASRs;
(iii)
Proper position/sitting
and orientation of the monitoring equipment; and
(iv)
Take into account the
prevailing meteorological conditions.
2.2.20 The ET shall agree with the ER on
the position of the HVS for installation of the monitoring equipment. When
positioning the samplers, the following points shall be noted:
(i)
A horizontal platform
with appropriate support to secure the samplers against gusty wind shall be
provided;
(ii)
No two samplers shall be
placed less than 2 metres apart;
(iii)
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;
(iv)
A minimum of 2 metres
of separation from walls, parapets and penthouses is required for rooftop
samplers;
(v)
A minimum of 2 metres
of separation from any supporting structure, measured horizontally is required;
(vi)
No furnace or
incinerator flue is nearby;
(vii)
Airflow around the
sampler is unrestricted;
(viii)
The sampler is more
than 20 metres from the dripline;
(ix)
Any wire fence and
gate, to protect the sampler, shall not cause any obstruction during
monitoring;
(x)
Permission must be
obtained to set up the samplers and to obtain access to the monitoring
stations; and
(xi)
A secured supply of
electricity is needed to operate the samplers.
2.2.21 Baseline monitoring shall be carried
out to determine the ambient 1-hour and 24‑hour average TSP levels at the
monitoring locations prior to the commencement of the construction works.
During the baseline monitoring, there shall not be any construction or
dust generating activities in the vicinity of the monitoring stations.
The baseline monitoring will provide data for the determination of the
appropriate Action Levels with the Limit Levels set against statutory or
otherwise agreed limits.
2.2.22 Before commencing the baseline monitoring,
the ET shall inform the IEC of the baseline monitoring programme such that the
IEC can conduct on-site audit to ensure accuracy of the baseline monitoring
results.
2.2.23 Baseline monitoring shall be carried
out at all of the designated monitoring locations for at least 14 consecutive
days prior to the commissioning of the construction works to obtain daily
24-hour TSP samples. One-hour sampling shall also be done at least 3
times per day. Baseline monitoring shall be carried out under
typical weather conditions. General meteorological conditions (wind speed,
direction and precipitation) and notes regarding any significant adjacent dust
producing sources shall also be recorded throughout the baseline monitoring
period.
2.2.24 In case the baseline monitoring
cannot be carried out at the designated monitoring locations during the
baseline monitoring period, the ET Leader shall carry out the monitoring at
alternative locations which can effectively represent the baseline conditions
at the impact monitoring locations. The alternative baseline monitoring
location shall be approved by the ER and agreed with the IEC.
2.2.25 In exceptional cases, when
insufficient baseline monitoring data or questionable results are obtained, the
ET Leader shall liaise with the ER, the IEC and EPD to agree on an appropriate
set of data to be used as a baseline reference and submit to the ER and the IEC
for agreement and EPD for approval.
2.2.26 Baseline checking of ambient TSP
levels shall be carried out every three months at each monitoring location,
when no dusty works activities are in operation. If the ET considers that
significant changes in the ambient conditions have arisen, a repeat of the
baseline monitoring may be carried out to update the baseline levels. The
revised baseline levels, and hence the revised Action and Limit Levels, shall
be agreed with the ER, EPD and the IEC.
Impact
Monitoring
2.2.27 The ET shall carry out impact
monitoring during the construction phase of the DP. For regular impact
monitoring, a sampling frequency of at least once in every six days shall be
strictly observed at all of the monitoring stations for 24-hour TSP
monitoring. For 1-hour TSP monitoring, the sampling frequency of at least
three times in every six days shall be undertaken when the highest dust impact
occurs.
2.2.28 Before commencing the 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 impact
monitoring results.
2.2.29 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 field operator.
2.2.30 In case of non-compliance with the
Action and Limit Levels, more frequent monitoring, as specified in the Event
and Action Plan in Table 2.2, shall be conducted within 24 hours after
the non-compliance is known. This additional monitoring shall be continued
until the excessive dust emission or the deterioration in air quality is
rectified.
2.2.31 The baseline monitoring results form
the basis for determining the Action and Limit Levels for the impact
monitoring. The ET shall compare the impact monitoring results with the
Action and Limit Levels for 1-hour and 24-hour average TSP. Table 2.2
shows the Action and Limit Levels to be used. Should non-compliance of
the Action and Limit Levels occurs, action in accordance with the Event and
Action Plan in Table 2.3 shall be carried out.
Table 2.2
Action and Limit Levels for Construction Dust Monitoring
Parameter
|
Action Level (1)
|
Limit Level
|
24-hour average TSP
|
BL £ 200 mg m-3,
AL = (BL * 1.3 + LL)/2
BL > 200 mg m-3, AL = LL
|
260 mg m-3
|
1-hour average TSP
|
BL £ 384 mg m-3,
AL = (BL * 1.3 + LL)/2
BL > 384 mg m-3, AL = LL
|
500 mg m-3
|
Note: (1) BL = Baseline level, AL = Action Level, LL = Limit Level.
Table 2.3
Event and Action Plan for Construction Dust Monitoring
EVENT
|
ACTION
|
ET
|
IEC
|
ER
|
CONTRACTOR
|
|
1. Identify source and
investigate the causes of exceedance;
2. Inform Contactor,
IEC and ER;
3. Repeat measurement
to confirm finding.
|
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.
|
|
1. Identify source
and investigate the causes of exceedance;
2. Inform Contractor,
IEC and ER;
3. Increase
monitoring frequency to daily;
4. Discuss with IEC
and Contractor on remedial actions required;
5. Assess the
effectiveness of Contractor’s remedial actions;
6. If exceedance
continues, arrange meeting with IEC and ER;
7. 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 ER on the
effectiveness of the proposed remedial measures.
|
1. Confirm receipt of
notification of exceedance in writing;
2. Notify Contractor;
3. In consolidation
with the IEC, agree with the Contractor on the remedial measures to be
implemented;
4. Supervise
implementation of remedial measures;
5. Conduct meeting
with ET and IEC if exceedance continues.
|
1. Discuss with ET and
IEC on proper remedial actions;
2. Submit proposals
for remedial actions to ER and IEC within three working days of notification;
3. Implement the
agreed proposals;
4. Amend proposal if
appropriate.
|
|
1.
Identify source and investigate the causes of exceedance;
2.
Inform Contractor, IEC, ER, and EPD;
3.
Repeat measurement to confirm finding;
4.
Assess effectiveness of Contractor’s remedial actions and keep EPD, IEC and
ER 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 ER on
the effectiveness of the proposed remedial measures.
|
1. Confirm receipt of
notification of exceedance in writing;
2. Notify Contractor;
3. In consolidation
with the IEC, agree with the Contractor on the remedial measures to be
implemented;
4. Supervise
implementation of remedial measures;
5. Conduct meeting
with ET and IEC if exceedance continues.
|
1. Take immediate
action to avoid further exceedance;
2. Discuss with ET
and IEC on proper remedial actions;
3. Submit proposals
for remedial actions to ER and IEC within three working days of notification;
4. Implement the
agreed proposals.
|
|
1. Notify IEC, ER,
Contractor and EPD;
2. Repeat measurement
to confirm findings;
3. Carry out analysis
of Contractor’s working procedures to identify source and investigate the
causes of exceedance;
4. Increase
monitoring frequency to daily;
5. Arrange meeting
with IEC, ER and Contractor to discuss the remedial actions to be taken;
6. Assess
effectiveness of Contractor’s remedial actions and keep EPD, IEC and ER
informed of the results;
7. If exceedance
stops, cease additional monitoring.
|
1. Check monitoring
data submitted by ET;
2. Check Contractor’s
working method;
3. Discuss amongst
ER, ET, and Contractor on the potential remedial actions;
4. Review
Contractor’s remedial actions whenever necessary to assure their effectiveness
and advise the ER accordingly.
|
1. Confirm receipt of
notification of exceedance in writing;
2. Notify Contractor;
3. In consolidation
with the IEC, agree with the Contractor on the remedial measures to be
implemented;
4. Supervise
implementation of remedial measures;
5. If exceedance
continues, consider stopping the Contractor to continue working on that
portion of work which causes the exceedance until the exceedance is abated.
|
1. Take immediate
action to avoid further exceedance;
2. Discuss with
ET, ER and IEC on proper remedial actions;
3. Submit
proposals for remedial actions to IEC within three working days of
notification;
4. Implement the
agreed proposals;
5. Submit further
remedial actions if problem still not under control;
6. Stop the
relevant portion of works as instructed by the ER until the exceedance is
abated.
|
2.2.32 Mitigation measures for construction
dust are recommended in the EIA Report. The Contractor shall be
responsible for the design and implementation of these measures.
2.2.33
In order to ensure
compliance with the acceptable criteria at the ASRs at all time, requirements
of the Air Pollution Control (Construction Dust) Regulation shall be
adhered to during the construction period. Misting for any stockpile of
materials and provision of windbreaks on three sides are proposed to prevent
wind erosion. An environmental monitoring and auditing program shall be
implemented to monitor the construction process in order to enforce controls
and modify methods of work if dusty conditions are arisen. In
addition, the following good site practices are recommended to minimise dust and
other air pollutants impacts during excavation, transportation, and loading and
unloading of dusty material:
Stockpiling site(s) should be lined
with impermeable sheeting and bunded. Stockpiles should be fully covered
by impermeable sheeting to reduce dust emission.
Misting for the dusty material
should be carried out before being loaded into the vehicle.
Any vehicle with an open load
carrying area should have properly fitted side and tail boards.
Material having the potential to
create dust should not be loaded from a level higher than the side and tail
boards and should be dampened and covered by a clean tarpaulin.
The tarpaulin should be properly
secured and should extent at least 300 mm over the edges of the sides and
tailboards. The material should also be dampened if necessary before
transportation.
The vehicles should be restricted to
maximum speed of 10 km per hour and confined haulage and delivery vehicle to
designated roadways insider the site. On-site unpaved roads should be
compacted and kept free of lose materials.
Vehicle washing facilities should be
provided at every vehicle exit point.
The area where vehicle washing takes
place and the section of the road between the washing facilities and the exit
point should be paved with concrete, bituminous materials or hardcores.
Every main haul road should be
scaled with concrete and kept clear of dusty materials or sprayed with water so
as to maintain the entire road surface wet.
Every stock of more than 20 bags of
cement should be covered entirely by impervious sheeting placed in an area
sheltered on the top and the three sides.
Every vehicle should be washed to remove
any dusty materials from its body and wheels before leaving the construction
sites.
2.2.34
The implementation schedule for the
recommended air quality impact mitigation measures is presented in Appendix A1.
2.3
Noise Impact
Noise Parameters
Construction Phase
2.3.1
The construction noise
level shall be measured in terms of the A-weighted equivalent continuous sound
pressure level (Leq). Leq (30 minutes) shall be
used as the monitoring parameter for the time period between 0700 and 1900
hours on normal weekdays. For all other time periods, Leq (5 minutes)
shall be employed for comparison with the Noise Control Ordinance (NCO)
criteria.
2.3.2
Supplementary
information for data auditing, statistical results such as L10 and L90
shall also be obtained for reference. A sample data record sheet based on
the one presented in the EM&A Guidelines for Development Projects in Hong Kong is shown in Appendix B.
The ET Leader may modify the data record sheet for this EM&A programme, of
which the format should be agreed by the ER and the IEC.
Monitoring Equipment
2.3.3
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 agree to within 1.0 dB.
2.3.4
Noise measurements
shall not be made in fog, rain, wind with a steady speed exceeding 5 m/s or
wind with gusts exceeding 10 m/s. The wind speed shall be checked with a
portable wind speed meter capable of measuring the wind speed in m/s.
2.3.5
The ET is responsible
for the provision 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.
Monitoring Locations
2.3.6
The locations of
construction and operational noise monitoring stations are summarized in Table
2.4 and shown in Figure
2.2. These locations represent the worst affected sensitive
receivers during construction.
Table 2.4
Noise Monitoring Stations
Noise Monitoring Station
|
NSR ID in EIA Report
|
Noise Monitoring Location
|
Construction
Noise
|
M1
|
N4
|
Buddhist Chi King Primary School
|
M2
|
N5
|
S.K.H Kowloon Bay Kei Lok Primary
School
|
M3
|
N11
|
Cognitio College
|
M4
|
N13
|
Lee Kau Yan Memorial School
|
M5
|
N14
|
Nam Yuen
|
M6
|
N23
|
Holly Carpenter Primary School
|
M7
|
N27
|
CCC Kei To Secondary School
|
M8
|
N28
|
Po Leung Kuk Ngan Po Ling College
|
M9
|
PN34
|
Site 1B1 (Planned)
|
M10
|
PN38
|
Site 1B4 (Planned)
|
2.3.7
The status and
locations of noise sensitive receivers may change after issuing this
Manual. If such case exists, the ET Leader shall propose updated
monitoring locations and seek approval from EPD and agreement from the ER and
the IEC before baseline monitoring commences.
2.3.8
When alternative
monitoring locations are proposed, the monitoring locations shall be chosen
based on the following criteria:
(i)
Monitoring at sensitive receivers close to the major site activities which are
likely to have noise impacts;
(ii) Monitoring at the noise
sensitive receivers as defined in the Technical Memorandum; and
(iii)
Assurance of minimal
disturbance to the occupants during monitoring.
2.3.9
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.
Baseline Monitoring
Construction Phase
2.3.10 The ET shall carry out baseline
noise monitoring prior to the commencement of the construction works. The
baseline monitoring shall be carried out daily for a period of at least two
weeks. Before commencing the baseline monitoring, the ET shall develop
and submit to the IEC the baseline monitoring programme such that the IEC can
conduct on-site audit to ensure accuracy of the baseline monitoring results.
2.3.11 There shall not be any construction
activities in the vicinity of the stations during the baseline monitoring.
2.3.12 In exceptional cases, when
insufficient baseline monitoring data or questionable results are obtained, the
ET Leader shall liaise with the ER, EPD and IEC to agree on an appropriate set
of data to be used as a baseline reference and submit to the ER and IEC for
agreement and EPD for approval.
Impact
Monitoring
Construction Phase
2.3.13 Noise monitoring shall be carried
out at all the designated monitoring stations. The monitoring frequency
shall depend on the scale of the construction activities. The following
is an initial guide on the regular monitoring frequency for each station on a
weekly basis when noise generating activities are underway:
·
one set of measurements
between 0700 and 1900 hours on normal weekdays.
2.3.14 If construction works are extended
to include works during the hours of 1900 – 0700 as well as public holidays and
Sundays, additional weekly impact monitoring shall be carried out during
respective restricted hours periods. Applicable permits under NCO shall be
obtained by the Contractor.
2.3.15 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.
2.3.16 In case of non-compliance with the
construction noise criteria, more frequent monitoring, as specified in the
Action Plan in Table 2.6, shall be carried out. This additional
monitoring shall be continued until the recorded noise levels are rectified or
demonstrated to be unrelated to the construction activities.
Event and Action Plan
Construction Phase
2.3.17 The Action and Limit levels for
construction noise are defined in Table 2.5. Should non-compliance
of the criteria occur, action in accordance with the Event and Action Plan in Table
2.6 shall be implemented.
Table 2.5
Action and Limit Levels for
Construction Noise
Time Period
|
Action Level
|
Limit Level
|
0700 – 1900 hours on normal
weekdays
|
When one
documented compliant is received
|
75 dB(A) *
|
Notes:
If works are to be carried out during restricted hours, the conditions stipulated
in the Construction Noise Permit (CNP) issued by the Noise Control Authority
have to be followed.
* 70 dB(A) and 65
dB(A) for schools during normal teaching periods and school examination
periods, respectively.
Mitigation Measures
Construction Phase
2.3.18 To alleviate the construction noise
impact on the affected NSRs, movable noise barriers and acoustic mats are
proposed to be provided for particular items of plant and construction works.
It is anticipated that a movable noise barrier with a cantilevered upper
portion located within 5m from any static or mobile plant can provide 5 dB(A)
noise reduction for mobile plant and 10 dB(A) noise reduction for static plant.
The barrier material shall have a surface mass of not less than 14 kg/m2
on skid footing with 25mm thick internal sound absorptive lining to achieve the
maximum screening effect.
2.3.19 In addition, the good site practices
listed below should be adopted by all the Contractors to further ameliorate the
noise impacts.
·
Only well-maintained
plant should be operated on-site and plant should be serviced regularly during
the construction program.
·
Silencers or mufflers
on construction equipment should be utilised and should be properly maintained
during the construction program.
·
Mobile plant, if any,
should be sited as far away from NSRs as possible.
·
Machines and plant
(such as trucks) that may be in intermittent use should be shut down between
works periods or should be throttled down to a minimum.
·
Plant known to emit
noise strongly in one direction should, wherever possible, be orientated so
that the noise is directed away from the nearby NSRs.
·
Material stockpiles and
other structures should be effectively utilised, wherever practicable, in
screening noise from on-site construction activities.
2.3.20 If the above measures are not
sufficient to restore the construction noise quality to acceptable levels upon
the advice of ET Leader, the Contractor shall liaise with the ET Leader to
identify further mitigation measures. They shall be proposed to ER for
approval, and the contractor shall then implement these additional mitigation
measures.
2.3.21 The implementation schedule for the
recommended mitigation measures is presented in Appendix A1.
Table 2.6
Event/Action Plan for Construction Noise
EVENT
|
ACTION
|
ET
|
IEC
|
ER
|
CONTRACTOR
|
Action Level being exceeded
|
4. Notify ER, IEC and
Contractor;
5. Carry out investigation;
6. Report the results of
investigation to the IEC, ER and Contractor;
7. Discuss with the IEC and
Contractor on remedial measures required;
8. Increase monitoring frequency
to check mitigation effectiveness.
(The above actions should be taken within 2 working days after the
exceedance is identified)
|
1. Review the
investigation results submitted by the ET;
2. Review the
proposed remedial measures by the Contractor and advise the ER accordingly;
3. Advise the ER on
the effectiveness of the proposed remedial measures.
(The above actions should be taken within 2
working days after the exceedance is identified)
|
1. Confirm receipt of
notification of failure in writing;
2. Notify Contractor;
3. In consolidation with the
IEC, agree with the Contractor on the remedial measures to be implemented;
4. Supervise the implementation of
remedial measures.
(The above actions should be taken within 2 working
days after the exceedance is identified)
|
1. Submit noise
mitigation proposals to IEC and ER;
2. Implement
noise mitigation proposals.
(The above actions should be taken within 2 working
days after the exceedance is identified)
|
Limit Level being exceeded
|
1. Inform IEC, ER, Contractor
and EPD;
2. Repeat measurements to
confirm findings;
3. Increase monitoring
frequency;
4. Identify source and investigate
the cause of exceedance;
5. Carry out analysis of
Contractor’s working procedures;
6. Discuss with the IEC,
Contractor and ER on remedial measures required;
7. Assess effectiveness of
Contractor’s remedial actions and keep IEC, EPD and ER informed of the
results;
8. If exceedance stops, cease
additional monitoring.
(The above actions should be taken within 2 working days after the
exceedance is identified)
|
1. Discuss amongst ER, ET, and
Contractor on the potential remedial actions;
2. Review Contractor’s remedial
actions whenever necessary to assure their effectiveness and advise the ER
accordingly.
(The above actions should be taken within 2 working days after the
exceedance is identified)
|
1. Confirm receipt of
notification of failure in writing;
2. Notify Contractor;
3. In consolidation with the
IEC, agree with the Contractor on the remedial measures to be implemented;
4. Supervise the implementation
of remedial measures;
5. If exceedance continues,
consider stopping the Contractor to continue working on that portion of work
which causes the exceedance until the exceedance is abated.
(The above actions should be taken within 2 working days after the
exceedance is identified)
|
1. Take immediate action to
avoid further exceedance;
2. Submit proposals for remedial
actions to IEC and ER within 3 working days of notification;
3. Implement the agreed
proposals;
4. Submit further proposal if
problem still not under control;
5. Stop the relevant portion of
works as instructed by the ER until the exceedance is abated.
(The above actions should be taken within 2 working days after the
exceedance is identified)
|
2.4
Water Quality Impact
Introduction
2.4.1
No off-site marine
water quality impact would be expected from the Project and given that there
would not be any marine-based works for the proposed works, water quality
monitoring is not considered necessary. However, it is recommended that
regular site audits (at least once per week) be undertaken to inspect the
construction activities and works areas in order to ensure the recommended
mitigation measures are properly implemented. Proposed mitigation measures for
containing and minimizing water quality impacts are listed in the
implementation schedule given in Appendix A1.
2.4.2
Implementation of regular
site audits (at least once per week) is to ensure that the recommended
mitigation measures are to be properly undertaken. It can also provide an
effective control of any malpractices and therefore achieve continual
improvement of environmental performance on site.
2.4.3
Site audits shall
include site inspections and monitoring audits.
Site Inspections
2.4.4
Site inspections shall
be carried out by the ET and shall be based on the mitigation measures for water
pollution control recommended in the implementation schedule as attached in Appendix A1.
In the event that the recommended mitigation measures are not fully or
properly implemented, deficiency shall be recorded and reported to the site
management. Suitable actions are to be carried out to:
·
Investigate the problems and the causes;
·
Issue action notes to the Contractor which is
responsible for the works;
·
Implement remedial and corrective actions immediately;
·
Re-inspect the site conditions upon completion of the
remedial and corrective actions; and
·
Record the event and discuss with the Contractor for
preventive actions.
Monitoring Audits
2.4.5
Monitoring audits are
to be undertaken to ensure that a valid discharge license has been issued by
EPD prior to the discharge of effluent from the Project site. Parameters
included in the WPCO licence, will also be included in the monitoring
programme. The chemical testing of water samples collected in the
monitoring programme should be undertaken by a Hong Kong Laboratory
Accreditation Scheme (HOKLAS) accredited laboratory. The audit results
reflect whether the effluent quality is in compliance with the discharge
license requirements and that the recommended water quality mitigation measures
are properly implemented. In case of non-compliance, suitable actions
should be undertaken to:
·
Notify the site management for the non-compliance;
·
Identify the sources of pollution;
·
Check the implementation status of the recommended
mitigation measures;
·
Investigate the operating conditions of the on-site
treatment systems;
·
Implement corrective and remedial actions to improve
the effluent quality;
·
Increase monitoring frequency until the effluent
quality is in compliance with the discharge licence requirements; and
·
Record the non-compliance and propose preventive
measures.
2.5
Waste Management Implications
2.5.1
Waste management will
be the Contractor’s responsibility to ensure that all wastes produced during the
construction works of the Project are handled, stored and disposed of in
accordance with good waste management practices and EPD’s regulations and
requirements.
2.5.2
Waste materials
generated during the construction works, such as, general refuse and chemical
wastes, are recommended to be audited at regular intervals (at least once per
week) to ensure that proper storage, transportation and disposal practices are
being implemented. This monitoring of waste management practices will ensure
that these solid and liquid wastes are not disposed into the nearby harbour
waters. The Contractor will be responsible for the implementation of any
mitigation measures to minimise waste or redress problems arising from the
waste materials.
Waste
Control and Mitigation Measures
2.5.3
Mitigation measures for
waste management are summarised below. With the appropriate handling,
storage and removal of waste arisings during the
construction works as defined below, the potential to cause adverse
environmental impacts will be minimised.
Good Site Practices
2.5.4
Adverse impacts related
to waste management are not expected to arise, provided that good site
practices are strictly followed. Recommendations for good site practices
during the construction works include:
·
Nomination of an
approved person, such as a site manager, to be responsible for good site
practices, arrangements for collection and effective disposal to an appropriate
facility, of all wastes generated at the site;
·
Training of site
personnel in proper waste management and chemical waste handling procedures;
·
Provision of sufficient
waste disposal points and regular collection for disposal;
·
Appropriate measures to
minimise windblown litter and dust during transportation of waste by either
covering trucks or by transporting wastes in enclosed containers;
·
Regular cleaning and
maintenance programme for drainage systems, sumps and oil interceptors;
·
A recording system for
the amount of wastes generated, recycled and disposed of (including the
disposal sites).
Waste Reduction Measures
2.5.5
Good management and
control can prevent the generation of a significant amount of waste. Waste
reduction is best achieved at the planning and design stage, as well as by
ensuring the implementation of good site practices. Recommendations to
achieve waste reduction include:
·
Sorting C&D waste
from construction activities to recover recyclable portions such as metals;
·
Segregation and storage
of different types of waste in different containers, skips or stockpiles to
enhance reuse or recycling of materials and their proper disposal;
·
Encouraging collection
of aluminium cans, PET bottles and paper by providing separate labelled bins to
enable these wastes to be segregated from other general refuse generated by the
work force;
·
Recycling any unused
chemicals or those with remaining functional capacity;
·
Proper storage and site
practices to minimise the potential for damage or contamination of construction
materials;
·
Planning and stocking
construction materials carefully to minimise amount of waste generated and
avoid unnecessary generation of waste.
2.5.6
In addition to the
above measures, specific mitigation measures are recommended below for the
identified waste arisings to minimise environmental impacts
during handling, transportation and disposal of these wastes.
Construction and Demolition Material
2.5.7
The C&D material
should be sorted on-site into inert C&D material (that is, public fill) and
C&D waste. The inert C&D material would require disposal to the
designated public fill reception facility. C&D waste, such as steel
and other metals should be re-used or recycled and, as a last resort, disposed
of to landfill. It is recommended that a suitable area be designated to
facilitate the sorting process and a temporary stockpiling area will be
required for the separated materials.
2.5.8
In order to monitor the
disposal of public fill and C&D waste at public filling facilities and
landfills, respectively, and to control fly tipping, a trip-ticket system
should be included as one of the contractual requirements and implemented by
the ET. The IEC should be responsible for auditing the results of the
system.
General Refuse
2.5.9
General refuse should be
stored in enclosed bins or compaction units separate from C&D
material. A licensed waste collector should be employed by the Contractor
to remove general refuse from the site, separately from C&D material.
Effective collection and storage methods (including enclosed and covered area)
of site wastes would be required to prevent waste materials from being blown
around by wind, wastewater discharge by flushing or leaching into the marine
environment, or creating odour nuisance or pest and vermin problem.
Chemical Wastes
2.5.10
After use, chemical
wastes (for example, cleaning fluids, solvents, lubrication oil and fuel)
should be handled according to the Code of Practice on the Packaging,
Labelling and Storage of Chemical Wastes. Spent chemicals should be
collected by a licensed collector for disposal at the CWTF or other licensed
facility, in accordance with the Waste Disposal (Chemical Waste) (General)
Regulation.
2.5.11
Table 2.7 provides a summary of the various
waste types likely to be generated during the construction works, together with
the recommended handling and disposal methods.
Table 2.7
Summary of Waste Handling Procedures and Disposal Routes
Waste Type
|
Generated From Works Item
|
Total Quantity Generated
|
Quantity to be disposed
off-site / re-used
|
Handling
|
Disposal
|
C&D Material
|
Distributor roads serving the
planned Kai Tak Development
|
2,217 m3 in total
|
Public fill / on-site reuse
|
Dust and water Dust quality mitigation
measures
|
Sort on-site into Inert
C&D material to be disposed off-site to the designated public fill
reception facility, C&D material should be reused as far as practicable
|
Chemical Wastes
|
Lubrication oil, fuel etc. from
operation, maintenance, and servicing of construction plant
|
Few cubic metres per month
(preliminary estimate)
|
Few cubic metres per month
(preliminary estimate)
|
Recycle on-site or by
licensed companies
Stored on-site within
suitably designed containers
|
Chemical Waste Treatment
Facility or other licensed facility
|
General Refuse
|
Waste paper, discarded
containers etc. generated from workforce
|
Few cubic metres per month
(preliminary estimate)
|
Few cubic metres per month
(preliminary estimate)
|
Provide on-site refuse
collection points
|
Refuse station for compaction
and containerisation and then to landfill
|
2.5.12
The implementation schedule of the
recommended mitigation measures is presented in Appendix A1.
2.6
Land Contamination Impact
2.6.1
The EIA study has
evaluated the potential land contamination issues that may pose impacts on the
construction of the new distributor roads. As indicated in the EIA study,
no potential land contamination associated with Roads D1, D2 & D3 is
anticipated; however potential land contamination impacts in association with
the proposed Road D4 alignment were revealed from the land contamination
investigations.
2.6.2
The proposed Road D4
alignment would encroach upon a small part of the sites of the ex-GFS building,
the Radar Station and the EMSD Kowloon Bay Vehicle Repairing and Maintenance
Workshop. Based on the findings of land contamination assessment, the extent of
identified contamination within the ex-GFS building and the Radar Station does
not fall within the alignment of Road D4, therefore adverse environmental
impact of the ex-GFS building and the Radar Station in respect of land
contamination on Road D4 is not anticipated. Therefore upon completion of any
necessary decontamination works at the EMSD Kowloon Bay Vehicle Repairing and
Maintenance Workshop, no adverse residual environmental impact in respect of
land contamination on Road D4 is anticipated.
2.6.3
However, it should be
noted that some small parts of the ex-GFS building and
Radar Station including the transformer room and the generator room etc. were still
under operation during the previous land contamination site investigation (SI),
SI at those areas was not possible due to site accessibility and safety
issues. For these remaining areas with potential land contamination
concerns, a supplementary land contamination SI was recommended to be carried
out upon the cessation of the operations under the Kai Tak Development
Project. A supplementary sampling plan providing the sampling and
laboratory analysis information for the supplementary SI in these areas has
been provided in the respective CAR and CAR/RAP for Radar Station and ex-GFS
building respectively.
2.6.4
During site
investigation, no exceedances in Dutch B level were found among the soil
samples collected in the areas surrounding the inaccessible areas in both Radar
Station and ex-GFS building, contamination, if any, within those inaccessible
areas are considered localized and surmountable and its impacts on the surrounding
environment are considered to be minimal. It should be noted that those inaccessible
areas do not fall within the alignment of Road D4 and thus any contamination
identified within those inaccessible areas in the future would not affect the
assessment on DP1 Project presented in this section.
2.6.5
For Electrical and Mechanical
Services Department (EMSD) Kowloon Bay Vehicle Maintenance Workshop, EMSD as
the current occupant shall conduct a detailed land contamination assessment and
complete the necessary remediation prior to handing over the site back to the
Government for construction of the proposed Road D4. The implementation
schedule of the recommended mitigation measures is presented in Appendix A1.
2.6.6
With proper
implementation and completion of the appropriate remediation action by EMSD for
the Kowloon Bay Vehicle Maintenance Workshop site next to a section of Road D4,
further mitigation measures with regards to land contamination would not be
necessary for the construction and operation of this project. Hence, no
environmental monitoring and audit requirements with regards to land
contamination will be required for this project.
2.7
Impact on Cultural
Heritage
2.7.1
The proposed Road D1 is situated in an area of
archaeological potential. The archaeological investigation recently
conducted for KTD confirmed that there is no archaeological potential in the
vicinity of Road D1 except the area around Trench AA3. Further
archaeological investigation and rescue excavation for the area around Trench
AA3 will be conducted as the mitigation recommendations for KTD. No
further archaeological investigation or mitigation will be required for Road
D1. Proposed Road D1 is not in the vicinity of any built heritage
resources and no adverse impacts will arise from the construction of Road D1.
2.7.2
The alignment of Roads
D3 and D4 are in the vicinity of Fire Station C together with its adjacent
pole, runway and seawall. However, the construction of Roads D3 and Road
D4 would not encroach onto the site of Fire Station C and its adjacent wind
pole. Besides, the construction of Roads D3 and Road D4 would also not
affect the seawall and the shape of the runway, no adverse impacts on
built heritage resources will arise from the construction of Roads D3 and
D4. Besides, since the proposed Roads D2, D3 and D4 are all located on
reclaimed land, the construction of the proposed Roads D2, D3 and D4 will not
cause any adverse impacts on archaeological resources.
2.7.3
No mitigation will be
required for the proposed DP1 Project and no EM&A requirements will be
necessary.
2.8
Landscape and Visual Impact
2.8.1
The EIA has recommended
landscape and visual mitigation measures to be undertaken during both the
construction and operational phases of the project. This section outlines
the monitoring and audit of these measures.
2.8.2
The sensitive receivers
are shown in Figure 2.4A,
2.4B, 2.5A, 2.5B, 2.6A, 2.6B.
Monitoring Details
2.8.3
The design,
implementation and maintenance of landscape and visual mitigation measures
should be checked to ensure that they are fully realised and that potential
conflicts between the proposed landscape measures and any other project works
and operational requirements are resolved at the earliest possible date and
without compromise to the intention of the mitigation measures.
2.8.4
Site inspection and
audit is necessary in the operation stage.
Table 2.8
Monitoring Programme
Stage
|
Monitoring Task
|
Monitoring Report
|
Form of Approval
|
Frequency
|
Design
|
Monitoring of design works against the recommendations of the
landscape and visual impact assessments within the EIA should be undertaken
during detailed design and tender stages, to ensure that they fulfil the
intentions of the mitigation measures. Any changes to the design,
including design changes on site should also be checked.
|
Report by ER confirming that the design conforms to requirements of EP
|
Approved by Client
|
At Completion of Design Stage
|
Construction
|
Monitoring of the contractor’s operations during the construction
period.
|
Report on Contractor's compliance, by ET
|
Counter-signature of report by IEC
|
Weekly
|
Establishment Works
|
Monitoring of the planting works during the 24-month Establishment
period after completion of the construction works.
|
Report on Contractor's compliance, by ET
|
Counter-signature of report by IEC
|
3 months
|
Design
2.8.5
The mitigation measures
proposed within the EIA to mitigate the landscape and visual impacts of the
scheme should be embodied into the detailed engineering design and landscape
design drawings and contract documents. Designs should be checked to ensure
that the measures are fully incorporated and that potential conflicts with
civil engineering, geo-technical, structural, lighting, signage, drainage,
underground utility and operational requirements are resolved prior to
construction.
Construction
& Establishment Period
2.8.6
The implementation of
landscape construction works and subsequent maintenance operations during the
12-month establishment period must be supervised by fully qualified Landscape
Resident Site Staff (Registered Landscape Architect or Professional Member of
the Hong Kong Institute of landscape Architects).
2.8.7
Measures to mitigate
landscape and visual impacts during construction should be checked to ensure
compliance with the intended aims of the measures.
2.8.8
The progress of the
engineering works shall be regularly reviewed on site to identify the earliest
practical opportunities for the landscape works to be undertaken.
Baseline Monitoring
2.8.9
A one off survey shall be
conducted prior to commencement of any construction works. A photographic
record of the site at the time of the contractor’s possession of the site shall
be prepared by the Contractor and approved by the ER. The approved
photographic Record shall be submitted to the Project proponent, ET, IEC and
EPD for record.
Event/Action Plan for Landscape and
Visual Works
2.8.10 Should non-compliance of the
landscape and visual impacts occur, actions in accordance with the action plan
stated in Table 2.9 should be carried out.
Table 2.9
Event and Action Plan for Landscape and Visual Impact
EVENT
ACTION LEVEL
|
ACTION
|
ET
|
IEC
|
ER
|
CONTRACTOR
|
Design Check
|
·
Check
final design conforms to the requirements of EP and prepare report.
|
·
Check
report.
·
Recommend
remedial design if necessary
|
·
Undertake
remedial design if necessary
|
|
Non-conformity on one
occasion
|
·
Identify
Source
·
Inform
IEC and ER
·
Discuss
remedial actions with IEC, ER and Contractor
·
Monitor
remedial actions until rectification has been completed
|
·
Check
report
·
Check
Contractor's working method
·
Discuss
with ET and Contractor on possible remedial measures
·
Advise
ER on effectiveness of proposed remedial measures.
·
Check
implementation of remedial measures.
|
·
Notify
Contractor
·
Ensure
remedial measures are properly implemented
|
·
Amend
working methods
·
Rectify
damage and undertake any necessary replacement
|
Repeated Non-conformity
|
·
Identify
Source
·
Inform
IEC and ER
·
Increase
monitoring frequency
·
Discuss
remedial actions with IEC, ER and Contractor
·
Monitor
remedial actions until rectification has been completed
·
If
non-conformity stops, cease additional monitoring
|
·
Check
monitoring report
·
Check
Contractor's working method
·
Discuss
with ET and Contractor on possible remedial measures
·
Advise
ER on effectiveness of proposed remedial measures
·
Supervise
implementation of remedial measures.
|
·
Notify
Contractor
·
Ensure
remedial measures are properly implemented
|
·
Amend
working methods
·
Rectify
damage and undertake any necessary replacement
|
2.8.11 The landscape and visual impact
assessment of the EIA recommends a series on mitigation measures, as noted
below:
Landscape and Visual Mitigation
Measures during Construction Phase
·
All existing
trees should be carefully protected during construction (CM1),
·
Trees
unavoidably affected by the works should be transplanted where practical.
Detailed transplanting proposal will be submitted to relevant government
departments for approval in accordance with ETWBC 2/2004 and 3/2006.
Final locations of transplanted trees should be agreed prior to commencement of
the work (CM2),
·
Control of
night-time lighting (CM3),
·
Erection of
decorative screen hoarding (CM4).
Landscape and Visual Mitigation
Measures during Operation Phase
·
Compensatory
tree planting should be incorporated into the proposed projects where trees are
affected (OM1),
·
Tall buffer
screen tree / shrub / climber planting should be incorporated to soften hard
engineering structures and facilities (OM2),
·
Sensitive
streetscape design should be incorporated along all new roads to reflect the
new urban development in Kai Tak (OM3),
·
Structure,
ornamental tree / shrub / climber planting should be provided along roadside
amenity strips and central dividers to enhance the townscape quality, where
space is available (OM4),
· Aesthetically pleasing
design as regard to the form, material and finishes should be incorporated to all
buildings, engineering structures and associated infrastructure facilities
(OM5)