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 and audit manual
Contents
5............ Air
Quality Impact. 5-1
5.1 Introduction. 5-1
5.2 Air Quality Parameters. 5-1
5.3 Monitoring Equipment 5-1
5.4 Monitoring Locations. 5-2
5.5 Baseline Monitoring. 5-2
5.6 Impact Monitoring.
5-2
5.7 Event and Action Plan. 5-2
5.8 Mitigation Measures. 5-2
List of Tables
Table 5.1
Proposed Air Quality Monitoring Locations
Table 5.2
Action and Limit Levels for Air Quality
Table 5.3
Event and Action Plan for Construction Dust Monitoring
Table 5.4
Event and Action Plan for Odour Monitoring
5
Air Quality Impact
5.1
Introduction
5.1.1
In this section, the requirements,
methodology, equipment, monitoring locations, criteria and protocols for the
monitoring and audit of air quality impact associated with the construction and
operational activities of the Project are presented. As identified in the
EIA report, the Project would not cause any adverse air quality impacts.
However, environmental monitoring and audit is recommended to monitor the
effectiveness of the proposed measures.
5.1.2
The objectives of the
air quality monitoring are:
·
To identify the extent
of dust impact during construction phase and odour impact during operational
phase on sensitive receivers;
·
To audit the compliance
of the Contractor with regard to dust control, contract conditions and the
relevant dust impact criteria;
·
To check the
effectiveness of odour mitigation measures by odour patrol and sediment
sampling;
·
To recommend further
mitigation measures if found to be necessary; and
·
To comply with Action and Limit Levels
for air quality as defined in this Manual.
5.2
Air Quality Parameters
Construction
Phase
5.2.1
Monitoring and audit of
the 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.
5.2.2
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.
5.2.3
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.
Operational Phase
Odour Patrol
5.2.4
Odour patrol should be
conducted by independent trained personnel / competent persons patrolling and
sniffing in the vicinity of the planned ASR along an odour patrol route within the
Kai Tak Development as mentioned in Section 5.4
to determine the operational odour impacts.
Sediment Sampling
5.2.5
In order to determine
the effectiveness of the bioremediation, monitoring of Acid Volatile Sulphide (AVS),
Redox and residual nitrate in treated sediment should
be carried out. The detailed sampling method as described in Section
5.3.
5.3
Monitoring Equipment
Construction Phase
5.3.1
High volume samplers (HVSs) in compliance with the following specifications shall
be used for carrying out the 1-hour and 24-hour TSP monitoring:
·
0.6 - 1.7 m3
per minute (20 - 60 standard cubic feet per minute) adjustable flow range;
·
Equipped with a timing
/ control device with ± 5 minutes accuracy for 24 hours operation;
·
Installed with
elapsed-time meter with ± 2 minutes accuracy for 24 hours operation;
·
Capable of providing a
minimum exposed area of 406 cm2 ;
·
Flow control accuracy:
± 2.5% deviation over 24-hour sampling period;
·
Equipped with a shelter
to protect the filter and sampler;
·
Incorporated with an
electronic mass flow rate controller or other equivalent devices;
·
Equipped with a flow
recorder for continuous monitoring;
·
Provided with a peaked
roof inlet;
·
Incorporated with a
manometer;
·
Able to hold and seal
the filter paper to the sampler housing at horizontal position;
·
Easy to change the
filter;
·
Capable of operating
continuously for 24-hour period.
5.3.2
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.
5.3.3
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.
5.3.4
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 on the data sheet as shown in Appendix B.
5.3.5
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.
5.3.6
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.
5.3.7
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
5.3.8
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.
5.3.9
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.
5.3.10 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.
5.3.11 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.
5.3.12 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.
5.3.13 All the collected samples shall be
kept in a good condition for 6 months before disposal.
Operational Phase
Odour Patrol
5.3.14 Odour patrol should be conducted by
independent trained personnel / competent persons (at least 2 odour patrol
members) patrolling and sniffing in the vicinity of the planned ASRs along an
odour patrol route within the Kai Tak Development as
mentioned in Section 5.4 to determine any potential operational odour
impacts arising from Kai Tak Approach Channel (KTAC)
and Kwun Tong Typhoon Shelter (KTTS). The odour
patrol member should be participated in a set of screening tests using a
certified n-butanol gas with their individual
thresholds (n-butanol) complied with the requirement
of European Standard Method (EN13725) in the range of 20 to 80 ppb. They
should also be free from any respiratory diseases and do not normally work at
or live in the area in the vicinity of typhoon shelters and KTAC.
Sediment Sampling
5.3.15
Undisturbed surface sediment core samples shall be
collected by manual or gravity pushing the corer into the sediment. Care
shall be taken in collection of the core to prevent contact with air or
excessive mixing of the sample. The core shall be at least 0.8m in
length. No iron or stainless steel components shall come into
contact with the sediments at any time. Core recovery shall be at least 60% and
the core shall be immediately sealed after collection to prevent leakage of odour and liquids. Care shall be taken in
sealing the core in order to prevent any gas leakages and to minimize the
amount of air inside the core. The core shall be properly labelled with information such as sampling ID, sample
length, diameter and depth as well as sampling date and time.
5.3.16
The collected sediments shall subject to further
chemical testing. The surface layer of sediments (from top to
approximately 10cm in depth) shall be tested for the parameters in below.
|
Parameter
|
Method
|
|
pH
/ Redox
|
A WTW
pH/redox meter (or equivalent) calibrated to
ISO9002 standards
|
|
AVS
|
Refer
to Environmental Toxicology and Chemistry, Vol. 13, No. 8;
pp.1273-1275. 1974
|
|
Residual
nitrate
|
APHA
4500 NO3-N E and 4500-NO2- B
|
5.4
Monitoring Locations
Construction Phase
5.4.1
The proposed dust
monitoring locations are shown in Figure
2.1. The selected monitoring locations are the ASRs located near to
the Project site. The proposed air quality monitoring locations are
listed in Table 5.1 below.
Table
5.1
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)
|
5.4.2
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.
5.4.3
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.
5.4.4
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.
Operational Phase
Odour Patrol
5.4.5
The proposed odour patrol
route and the proposed sniffing locations in the vicinity of the planned ASRs
during operational phase are shown in Figure 5.1.
Sediment Sampling
5.4.6
Sediment sampling locations are summarized in
below. Three samples should be collected randomly from each of the three
areas namely northern KTAC, southern KTAC and KTTS. Details and number of
samples to be collected at each area are summarized below.
|
Sampling
Area
|
No. of Sample
|
|
(i)
Northern Kai Tak Approach Channel (KTAC)
|
3
|
|
(iii) Southern
KTAC
|
3
|
|
(iv) Kwun Tong Typhoon Shelter (KTTS)
|
3
|
5.5
Baseline Monitoring
Construction Phase
5.5.1
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 Project 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.
5.5.2
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.
5.5.3
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.
5.5.4
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.
5.5.5
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.
5.5.6
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.
Operational Phase
Odour Patrol
5.5.7
Prior to the implementation
of the proposed full-scale in-situ bioremediation at KTAC and KTTS, a baseline
odour patrol shall be undertaken along the proposed odour patrol route as shown
in Figure 5.1.
The baseline odour patrol shall be carried out monthly from July to September
along the same odour route and at the same sniffing locations. The odour
patrol shall be carried out during daytime and evening/night time covering high
tide and low tide conditions. No odour patrol shall be conducted
during rainy days.
5.5.8
The objective of the
baseline odour patrol is to provide some baseline data for future validation of
the effectiveness of the odour mitigation measures. The independent
trained personnel / competent persons shall record the findings including time
of survey, tidal condition, weather condition such as sunny, fine, cloudy and
rainy, odour intensity, odour nature and possible odour sources, and also the
local wind speed and direction at each sniffing location.
5.5.9
In addition, the
following information shall be obtained:
·
Meteorological
conditions (including temperature, wind speed, wind direction, relative
humidity) from the nearest Hong Kong Observatory’s Weather Station including
King’s Park and Kai Tak meteorological stations
during the monitoring;
·
Whether any abnormal
observation at the KTAC and KTTS during the monitoring.
Sediment Sampling
5.5.10 Prior to the implementation of the
proposed full-scale in-situ bioremediation at KTAC and KTTS, a baseline
sediment sampling shall be undertaken at KTAC and KTTS.
5.6
Impact Monitoring
Construction Phase
5.6.1
The ET shall carry out
impact monitoring during the construction phase of the Project. 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.
5.6.2
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.
5.6.3
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.
5.6.4
In case of
non-compliance with the Action and Limit Levels, more frequent monitoring, as
specified in the Event and Action Plan in Table 5.3, 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.
Operational Phase
Odour Patrol
5.6.5
Odour patrol shall be
conducted by at least 2 independent trained personnel / competent persons
patrolling and sniffing along the proposed odour patrol route as shown in Figure 5.1.
5.6.6
Monthly (from July to
September) odour patrol for a period of 2 years shall be conducted during the
operational phase after completion of the odour remediation works conducted at
KTAC and KTTS including the full-scale in-situ bioremediation, localized
maintenance dredging and the 600m gap opening. The monitoring events
shall be carried out during daytime and evening/night time covering high tide
and low tide conditions. No odour patrol shall be conducted during rainy
days. The need to continue the odour patrol at the end of the second year
would be subjected to the odour patrol results and should be agreed with EPD.
5.6.7
The need to further
extend the odour patrol after the end of the 2 years monitoring period would
depend on the monitoring results. If the results of detected odour
intensity at any sniffing location is higher than 1 due to potential odour
emission from KTAC in two consecutive months, the odour patrol programme shall
be extended until the odour intensity (that is determined to be due to
potential odour emission from KTAC) at all the sniffing locations have dropped
to below 1 in three consecutive months.
5.6.8
The independent trained
personnel / competent persons shall:
·
have their individual
odour threshold of n-butanol in nitrogen gas in the
range of 20 to
80 ppb/v required by the European Standard Method (EN 13725).
·
be at least 16 years of
age and willing and able to follow instructions.
·
be free from any
respiratory illnesses.
·
be engaged for a
sufficient period to build up and monitor/detect at several monitoring
location;
·
not be allowed to
smoke, eat, drink (except water) or use chewing gum or sweets 30 min before and
during odour intensity analysis;
·
take great care not to cause
any interference with their own perception or that of others by lack of
personal hygiene or the use of perfumes, deodorants, body lotions or cosmetics;
·
not communicate with
each other about the results of their choices.
5.6.9
At least two
independent trained personnel / competent persons shall be selected to form a
patrol team to conduct the odour intensity analysis, who should be participated
in a set of screening tests.
5.6.10 Subject to the prevailing weather forecast
condition, odour patrol shall be conducted by independent trained personnel /
competent persons along the proposed odour patrol route as shown in Figure 5.1. During
the patrol, the sequence should start from less odorous locations to stronger
odorous locations.
5.6.11 The independent trained personnel /
competent persons shall use their nose (olfactory sensors) to sniff odours at
different locations. The main odour emission sources and the areas to be
affected by the odour nuisance shall be identified.
5.6.12 The perceived odour intensity is to
be divided into 5 levels which are ranked in the descending order as follows:
·
0 - Not detected. No
odour perceived or an odour so weak that it can not be easily characterised or
described;
·
1 - Slight Identifiable
odour, and slight chance to have odour nuisance;
·
2 - Moderate
Identifiable odour, and moderate chance to have odour nuisance;
·
3 - Strong
Identifiable, likely to have odour nuisance;
·
4 - Extreme Severe
odour, and unacceptable odour level.
5.6.13 The independent trained personnel / competent persons shall record
the findings including time of survey, tidal condition, weather condition such
as sunny, fine, cloudy and rainy, odour intensity, odour nature and possible odour
sources, and also the local wind speed and direction at each location. In
addition, some relevant meteorological data such as daily average temperature,
and daily average humidity, on that surveyed day shall be obtained from the
nearest Hong Kong Observatory Stations including King’s Park and Kai Tak meteorological stations for reference.
Sediment Sampling
5.6.14 Annual sediment sampling for a
period of 2 years shall be conducted during the operational phase after
completion of the odour remediation works conducted at KTAC and KTTS including
the full-scale in-situ bioremediation, localized maintenance dredging and the
600m gap opening. The need to continue the sediment sampling at the end
of the second year would be subjected to the sediment sampling results and
should be agreed with EPD.
5.7
Event and Action Plan
5.7.1
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
5.2 shows the Action and Limit Levels to be used for construction dust and
odour patrol. Should non-compliance of the Action and Limit Levels
occurs, action in accordance with the Event and Action Plan in Table 5.3 and
5.4 shall be carried out.
5.7.2
In the event when an odour
complaint is received, CEDD shall liaise with the complainant and a
register the complaint. The complaint register is to record detailed
information regarding the odour complaint and hence, facilitates efficient
investigation work. The registration shall contain, but not be limited to
the following information:
·
Location of where the
odour nuisance occurred;
·
Date and time of the
complaint and the nuisance event;
·
Description of the
complaint, i.e. the type and characteristics of the odour; and an indication of
the odour strength (highly offensive / offensive / slightly offensive / just
continuously detectable /intermittently detectable);
·
Meteorological
conditions from the nearest HK Observatory station at the time of complaint;
and
·
Name and contact
information of the complainant.
Table
5.2
Action and Limit Levels for Air
Quality
|
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
|
|
Odour Nuisance (from odour
intensity analysis or odour patrol)
|
Ø
When one documented
complaint are received(2); or
Ø
Odour Intensity of 2
is measured from odour intensity analysis.
|
Ø
Two or more
documented complaints are received(2) within a week; or
Ø
Odour Intensity of 3
or above is measured from odour intensity analysis.
|
Note: (1) BL = Baseline level, AL = Action Level, LL =
Limit Level.
(2) Once the complaint is received from CEDD/EPD, CEDD would
investigate and verify the complaint whether it is related to the potential
odour emission from KTTS, KTAC and KTN.
Table
5.3
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.
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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.
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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.
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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.
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Table
5.4
Event and Action Plan for Odour Monitoring
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EVENT
|
ACTION
|
|
|
Person-in-charge of Odour Monitoring
|
CEDD
|
|
ACTION
LEVEL
|
|
Exceedance of action level (Odour Patrol)
|
1. Identify source/reason of exceedance;
2.
Repeat odour patrol to confirm finding.
|
1. Carry out investigation to
identify the source/reason of exceedance.
Investigation shall be completed within 2 week;
2. Rectify any unacceptable
practice;
3. Implement more
mitigation measures if necessary;
4. Inform EPD or DSD or MD
if exceedance is considered to be caused by
expedient connections or floating debris.
|
|
Exceedance of action level (Odour Complaints)
|
1. Identify source / reason of exceedance;
2. Carry out odour patrol to determinate
odour intensity.
|
1. Carry out investigation and
verify the complaint whether it is related to potential odour emission from
KTTS, KTAC and KTN.
2. Carry out investigation
to identify the source/reason of exceedance.
Investigation shall be completed within 2 week;
3. Rectify any unacceptable
practice;
4. Implement more
mitigation measures if necessary;
5. Inform EPD or DSD or MD
if exceedance is considered to be caused by
expedient connections or floating debris.
|
|
LIMIT LEVEL
|
|
Exceedance of Limit level
|
1. Identify source / reason of exceedance;
2. Inform EPD
3. Repeat odour patrol to confirm findings;
4. Increase odour patrol frequency to
bi-weekly;
5. Assess effectiveness of remedial action
and keep EPD informed of the results.
6. If exceedance
stops, cease additional odour patrol.
|
1. Carry out investigation to
identify the source/reason of exceedance.
Investigation shall be completed within 2 week;
2. Rectify any unacceptable
practice;
3. Formulate remedial actions;
4. Ensure remedial actions properly
implemented;
5. If exceedance
continues, consider what more/enhanced mitigation measures shall be
implemented;
6. Inform EPD or DSD or MD if exceedance is considered to be caused by expedient
connections or floating debris.
|
5.8
Mitigation Measures
Construction Phase
5.8.1
Mitigation measures for
dust are recommended in the EIA Report. The Contractor shall be
responsible for the design and implementation of these measures.
5.8.2
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 soil excavation, transportation,
loading and unloading the excavated contaminated soils:
l Stockpiling site(s) should be lined
with impermeable sheeting and bunded.
Stockpiles should be fully covered by impermeable sheeting to reduce dust
emission.
l Misting for the dusty material should
be carried out before being loaded into the vehicle.
l Any vehicle with an open load
carrying area should have properly fitted side and tail boards.
l 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.
l 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.
l 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.
l Vehicle washing facilities should be
provided at every vehicle exit point.
l 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.
l 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.
l 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.
l Every vehicle should be washed to
remove any dusty materials from its body and wheels before leaving the construction
sites.
5.8.3
The implementation
schedule for the recommended air quality impact mitigation measures is
presented in Appendix
A4.
Operational Phase
5.8.4
Mitigation measures
have been formulated to alleviate the existing odour problem generated from Kwun Tong Typhoon Shelter (KTTS), KTAC and Kai Tak Nullah. These include
reconstruction or decking of KTN within the former apron area, full mitigation
of the potential odour emissions from the headspace of KTN and Jordan Valley
Box Culvert (JVBC) near the existing discharge locations, localised maintenance
dredging within KTAC, 600m gap opening at the northern section of the former
runway to improve the water circulation in KTAC, and the implementation of
in-situ bioremediation to treat the sediment accumulated at KTAC and KTTS.
5.8.5
The implementation
schedule for the recommended odour mitigation measures is presented in Appendix A4.
CEDD will identify an implementation agent.