TABLE OF CONTENTS
Page
1.4 Summary of Construction Works
1.5 Summary of EM&A Programme Requirements
2.4 Monitoring Parameters, Frequency and Duration
2.6 Monitoring Schedule for the Reporting Month
3.4 Monitoring Parameters, Frequency and Duration
3.6 Monitoring Schedule for the Reporting Month
4.3 Monitoring Parameters, Frequency and Duration
4.6 Monitoring Schedule for the Reporting Month
5.3 Monitoring Frequency and Conditions
5.4 Monitoring Methodology and Location
5.6 Monitoring Schedule for the Reporting Month
6 ENVIRONMENTAL
SITE INSPECTION AND AUDIT
6.2 Advice on the Solid and Liquid Waste Management Status
6.3 Environmental Licenses and Permits
6.4 Implementation Status of Environmental Mitigation Measures
6.5 Summary of Exceedances of the Environmental Quality
Performance Limit
6.6 Summary of Complaints, Notification of Summons and
Successful Prosecutions
7.1 Construction Programme for the Coming Months
7.2 Key Issues for the Coming Month
7.3 Monitoring Schedule for the Coming Month
8 ConclusionS AND RECOMMENDATIONS
List of
Tables
Table 1.1 Contact Information of Key Personnel
Table 2.1 Air Quality
Monitoring Equipment
Table 2.2 Locations of Impact
Air Quality Monitoring Stations
Table 2.3 Air Quality
Monitoring Parameters, Frequency and Duration
Table 2.4 Summary of 1-hour TSP
Monitoring Results in the Reporting Period
Table 2.5 Summary of 24-hour
TSP Monitoring Results in the Reporting Period
Table 3.1 Noise Monitoring
Equipment
Table 3.2 Locations of Impact
Noise Monitoring Stations
Table 3.3 Noise Monitoring
Parameters, Frequency and Duration
Table 3.4 Summary of
Construction Noise Monitoring Results in the Reporting Period
Table 4.1 Water Quality
Monitoring Equipment
Table 4.2 Impact Water Quality
Monitoring Parameters and Frequency
Table 4.3 Impact Water Quality
Monitoring Stations
Table 4.4 Laboratory Analysis
for Suspended Solids
Table 4.5 Summary of Water
Quality Exceedances
Table 5.1 Dolphin Monitoring
Equipment
Table 5.2 Impact Dolphin
Monitoring Line Transect Co-ordinates (Provided by AFCD)
Table 5.3 Impact Dolphin
Monitoring Survey Effort Summary, Effort by Area and
Beaufort State
Table 5.4 Impact Dolphin
Monitoring Survey Details in July 2013
Table 5.5. The Encounter Rate of Number of Dolphin Sightings &
Total Number of Dolphins per Area
Table 6.1 Summary of Environmental Licensing and Permit Status
Figures
Figure 1 General
Project Layout Plan
Figure
2 Impact
Air Quality and Noise Monitoring Stations and Wind Station
Figure
3 Impact
Water Quality Monitoring Stations
Figure
4 Impact
Dolphin Monitoring Line Transect Layout Map
Figure 5 Impact
Dolphin Monitoring Survey Efforts and Sightings in July 2013
Figure 6 Environmental
Complaint Handling Procedure
List of Appendices
Appendix
A Project
Organization for Environmental Works
Appendix
B Three
Month Rolling Construction Programmes
Appendix C Implementation
Schedule of Environmental Mitigation Measures (EMIS)
Appendix D Summary of Action
and Limit Levels
Appendix
E Calibration
Certificates of Monitoring Equipments
Appendix
F EM&A
Monitoring Schedules
Appendix
G Impact Air
Quality Monitoring Results and their Graphical Presentation
Appendix H Meteorological Data for Monitoring Periods on Monitoring
Dates in July 2013
Appendix
I Impact
Construction Noise Monitoring Results and their Graphical Presentation
Appendix J Impact Water Quality Monitoring Results and their Graphical Presentation
Appendix
K Impact
Dolphin Monitoring Survey Sighting Summary
Appendix
M Monthly
Summary of Waste Flow Table
Contract No. HY/2010/02 ¡V Hong Kong-Zhuhai-Macao Bridge
Hong Kong Boundary Crossing Facilities ¡V Reclamation Work (here below, known as
¡§the Project¡¨) mainly comprises reclamation at the northeast of
the Hong Kong International Airport of
an area of
about 130-hectare for
the construction of an artificial island for the development of the Hong
Kong Boundary Crossing Facilities (HKBCF), and about 19-hectare for the
southern landfall of the Tuen Mun - Chek Lap Kok Link (TMCLKL). It is a
designated project and is governed by the current permits for the Project, i.e.
the amended Environmental Permits (EPs) issued on 06 August
2013 (EP-353/2009/G) and
8 December 2011 (EP-354/2009/A) (for TMCLKL Southern Landfall Reclamation
only).
Ove Arup & Partners Hong Kong Limited (Arup) was
appointed by Highways Department (HyD) as the consultants for the design and
construction assignment for the Project¡¦s reclamation works (i.e. the Engineer
for the Project).
China Harbour Engineering Company Limited (CHEC) was
awarded by HyD as the Contractor to undertake the construction work of the
Project.
ENVIRON Hong Kong Ltd. was employed by HyD as the
Independent Environmental Checker (IEC) and Environmental Project Office (ENPO)
for the Project.
AECOM Asia Co. Ltd. (AECOM) was appointed by CHEC to
undertake the role of Environmental Team for the Project for carrying out the
environmental monitoring and audit (EM&A) works.
The construction phase of the Project under the EPs was
commenced on 12 March 2012 and will be tentatively completed by early Year
2016. The EM&A programme, including air quality, noise, water quality and
dolphin monitoring and environmental site inspections, was commenced on 12
March 2012.
This report documents the findings of EM&A works conducted in the period between 1 and 31 July 2013. As informed by the Contractor, major activities in the reporting period were:-
Marine-based Works
-
Cellular structure installation
-
Connecting arc cell installation
-
Laying geo-textile
-
Sand blanket laying
-
Sand filling
-
Maintenance of silt curtain & silt screen at sea water intake
of HKIA
-
Stone column installation
-
Laying stone blanket
-
Band drain installation
-
Backfill cellular structure
-
Instrumentation works
-
Rubble mound seawall construction
-
Construction of temporary seawall
-
Ground investigation
Land-based Works
-
Maintenance works of Site Office at Works Area WA2
-
Maintenance works of Public Works Regional Laboratory at
Works Area WA3
-
Geo-textile fabrication at Works Area WA2
-
Silt curtain fabrication at Works Area WA4
-
Maintenance of Temporary Marine Access at Works Area WA2
A summary of monitoring and audit
activities conducted in the reporting period is listed below:
24-hour Total Suspended
Particulates (TSP) monitoring 1-hour TSP monitoring |
5 sessions
5 sessions |
Noise monitoring |
4 sessions |
Impact water quality
monitoring |
14 sessions |
Impact dolphin monitoring |
2 surveys |
Joint Environmental site
inspection |
4 sessions |
Breaches of
Action and Limit Levels for Air Quality
All
1-Hour TSP and 24-hour TSP results were below the Action and Limit Level in the
reporting month.
Breaches of
Action and Limit Levels for Noise
For construction noise, no exceedance was recorded at all monitoring stations in the reporting period.
Breaches of
Action and Limit Levels for Water Quality
Three (3) Action Level exceedances were recorded at measured suspended solids (SS) values (in mg/L) in the reporting month. Investigation results show that the exceedances were not due to the Project works.
Impact
Dolphin Monitoring
A total of twenty one dolphin sightings were recorded during the
two surveys, eleven on 8 July
2013, six on 23 July 2013 and four on 31 July 2013.
Of the twenty one sightings, fourteen were ¡§on effort¡¨ (which are all under
favourable condition) and seven
were
¡§opportunistic¡¨. A total of sixty one individuals were sighted from the two impact
dolphin surveys in the reporting period. Sighting details are summarised and
plotted in Appendix K and Figure 5c, respectively.
Behaviour: Of the 21 sightings made, three
were classified as travelling; two sightings were recorded as ¡¥multiple¡¦ behavior
(both a combination of feeding and surface active); 11 sightings was recorded
as feeding, two as surface active, three as travelling and; three as ¡§unknown¡¨ in
Figure 5d.
Complaint,
Notification of Summons and Successful Prosecution
No complaint, summons or prosecution was received in the
reporting period.
Reporting Change
There was no
reporting change required in the reporting period.
Future Key Issues
Key issues to be considered in
the coming month included:-
-
Site runoff should be properly collected and treated prior to
discharge;
-
Minimize loss of sediment from filling works;
-
Regular review and maintenance of silt curtain systems, drainage
systems and desilting facilities;
-
Exposed surfaces/soil stockpiles should be properly treated to
avoid generation of silty surface run-off during rainstorm;
-
Regular review and maintenance of wheel washing facilities
provided at all site entrances/exits;
-
Conduct regular inspection of various working machineries and
vessels within works areas to avoid any dark smoke emission;
-
Suppress dust generated from work processes with use of bagged
cements, earth movements, excavation activities, exposed surfaces/soil
stockpiles and haul road traffic;
-
Quieter powered mechanical equipment should be used;
-
Provision of proper and effective noise control measures for
operating equipment and machinery on-site, such as erection of movable noise
barriers or enclosure for noisy plants;
-
Closely check and replace the sound insulation materials
regularly;
-
Better scheduling of construction works to minimize noise
nuisance;
-
Properly store and label oil drums and chemical containers placed
on site;
-
Proper chemicals, chemical wastes and wastes management;
-
Maintenance works should be carried out within roofed, paved and
confined areas;
-
Collection and segregation of construction waste and general
refuse on land and in the sea should be carried out properly and regularly; and
-
Proper protection and regular inspection of existing trees,
transplanted/retained trees.
1.1.1
Contract No. HY/2010/02 ¡V
Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities ¡V
Reclamation Work (here below, known as ¡§the Project¡¨) mainly comprises
reclamation at the northeast of the
Hong Kong International Airport of
an area of
about 130-hectare for
the construction of an artificial island for the development of the Hong
Kong Boundary Crossing Facilities (HKBCF), and about 19-hectare for the
southern landfall of the Tuen Mun - Chek Lap Kok Link (TMCLKL).
1.1.2
The environmental impact assessment (EIA) reports (Hong Kong ¡V
Zhuhai ¡V Macao Bridge Hong Kong Boundary Crossing
Facilities ¡V EIA Report (Register No. AEIAR-145/2009) (HKBCFEIA) and Tuen Mun ¡V
Chek Lap Kok Link ¡V EIA Report (Register No. AEIAR-146/2009) (TMCLKLEIA), and
their environmental monitoring and audit (EM&A) Manuals (original EM&A
Manuals), for the Project were approved by Environmental Protection Department
(EPD) in October 2009.
1.1.1 EPD
subsequently issued the
Environmental Permit (EP) for HKBCF in November 2009
(EP-353/2009) and the Variation of Environmental Permit (VEP) in June 2010
(EP-353/2009/A), November 2010 (EP-353/2009/B), November 2011 (EP-353/2009/C), March 2012
(EP-353/2009/D), October 2012
(EP-353/2009/E), April 2013 (EP-353/2009/F) and August 2013 (EP-353/2009/G). Similarly, EPD issued the Environmental Permit (EP) for
TMCLKL in November 2009 (EP-354/2009) and the Variation of Environmental Permit
(VEP) in December 2010 (EP-354/2009/A).
1.1.2
The Project is a designated
project and is governed by the current permits for the Project, i.e. the
amended EPs issued on 6 August 2013 (EP-353/2009/G) and 8 December 2011 (EP-354/2009/A) (for TMCLKL Southern
Landfall Reclamation only).
1.1.3
A Project Specific EM&A
Manual, which included all project-relation contents from the original EM&A
Manuals for the Project, was issued in May 2012.
1.1.4
Ove Arup & Partners Hong
Kong Limited (Arup) was appointed by Highways Department (HyD) as the
consultants for the design and construction assignment for the Project¡¦s
reclamation works (i.e. the Engineer for the Project).
1.1.5
China Harbour Engineering
Company Limited (CHEC) was awarded by HyD as the Contractor to undertake the
construction work of the Project.
1.1.6
ENVIRON Hong Kong Ltd. was
employed by HyD as the Independent Environmental Checker (IEC) and
Environmental Project Office (ENPO) for the Project.
1.1.7
AECOM Asia Co. Ltd. (AECOM)
was appointed by CHEC to undertake the role of Environmental Team for the
Project for carrying out the EM&A works.
1.1.8
The construction phase of the
Project under the EPs was commenced on 12 March 2012 and will be tentatively
completed by early Year 2016.
1.1.9
According to the Project
Specific EM&A Manual, there is a need of an EM&A programme including
air quality, noise, water quality and dolphin monitoring and environmental site
inspections. The EM&A programme of the Project commenced on 12 March 2012.
1.2.1
This is the seventeenth monthly EM&A Report under the Contract No. HY/2010/02
Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities ¡V
Reclamation Works. This report
presents a summary of the environmental monitoring and audit works, list of
activities and mitigation measures proposed by the ET for the Project in July 2013.
1.3.1 The project organization structure is shown in Appendix A.
The key personnel contact names and numbers are summarized in Table 1.1.
Table 1.1 Contact Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
Engineer¡¦s Representative (ER)
(Ove
Arup & Partners Hong Kong Limited) |
Chief Resident Engineer |
Roger Marechal |
3698 5700 |
2698 5999 |
IEC / ENPO (ENVIRON Hong Kong Limited) |
Independent Environmental
Checker |
Raymond Dai |
3743 0788 |
3548 6988 |
Environmental Project Office
Leader |
Y. H. Hui |
3743 0788 |
3548 6988 |
|
Contractor (China Harbour Engineering
Company Limited) |
General Manager (S&E) |
Daniel Leung |
3157 1086 |
2578 0413 |
Environmental Officer |
C. M. Wong |
3157 1086 |
2578 0413 |
|
24-hour Hotline |
Alan C.C. Yeung |
9448 0325 |
-- |
|
ET (AECOM
Asia Company Limited) |
ET Leader |
Echo Leong |
3922 9280 |
2317 7609 |
1.4
Summary of
Construction Works
1.4.1 The construction phase of the
Project under the EP commenced on 12 March 2012.
1.4.2 As informed by the Contractor,
details of the major works carried out in this reporting period are listed
below:-
Marine-based Works
-
Cellular structure installation
-
Connecting arc cell installation
-
Laying geo-textile
-
Sand blanket laying
-
Sand filling
-
Maintenance of silt curtain & silt screen at sea water intake
of HKIA
-
Stone column installation
-
Laying stone blanket
-
Band drain installation
-
Backfill cellular structure
-
Instrumentation works
-
Rubble mound seawall construction
-
Construction of temporary seawall
-
Ground investigation
Land-based Works
-
Maintenance works of Site Office at Works Area WA2
-
Maintenance works of Public Works Regional Laboratory at
Works Area WA3
-
Geo-textile fabrication at Works Area WA2
-
Silt curtain fabrication at Works Area WA4
-
Maintenance of Temporary Marine Access at Works Area WA2
1.4.3 The 3-month rolling construction
programme of the Project is shown in Appendix B.
1.4.4 The general layout plan of the
Project site showing the detailed works areas is shown in Figure 1.
1.4.5 The environmental mitigation
measures implementation schedule are presented in Appendix C.
1.5
Summary of EM&A
Programme Requirements
1.5.1
The EM&A programme required environmental monitoring for air
quality, noise, water quality, marine ecology and environmental site
inspections for air quality, noise, water quality, waste management, marine
ecology, and landscape and visual impact. The EM&A requirements for each
parameter described in the following sections include:-
-
All monitoring parameters;
-
Monitoring schedules for the
reporting month and forthcoming month;
-
Action and Limit levels for all
environmental parameters;
-
Event / Action Plan;
-
Environmental mitigation
measures, as recommended in the Project EIA reports; and
-
Environmental requirement in
contract documents.
2.1.1 In accordance with the Project
Specific EM&A Manual, baseline 1-hour and 24-hour Total Suspended
Particulates (TSP) levels at 4 air quality monitoring stations were
established. Impact 1-hour TSP monitoring was conducted for at least three
times every 6 days, while impact 24-hour TSP monitoring was carried out for at
least once every 6 days. The Action and Limit level of the air quality
monitoring is provided in Appendix D.
2.2.1 24-hour TSP air quality
monitoring was performed using High Volume Sampler (HVS) located at each
designated monitoring station. The HVS meets all the requirements of the
Project Specific EM&A Manual.
Portable direct reading dust meters were used to carry out the 1-hour
TSP monitoring. Brand and model of
the equipment is given in Table 2.1.
Table
2.1 Air
Quality Monitoring Equipment
Equipment |
Brand
and Model |
Portable
direct reading dust meter (1-hour TSP) |
Sibata
Digital Dust Monitor (Model No. LD-3
and LD-3B) |
High
Volume Sampler |
Tisch
Environmental Mass Flow Controlled Total Suspended Particulate (TSP) High Volume
Air Sampler (Model
No. TE-5170) |
2.3.1 Monitoring locations AMS2 and
AMS7 were set up at the proposed locations in accordance with Project Specific
EM&A Manual. For AMS6 (Dragonair/CNAC (Group) Building), permission on
setting up and carrying out impact monitoring works was sought, however, access
to the premise has not been granted yet on this report issuing date. For
monitoring location AMS3 (Ho Yu College), as proposed in the Project Specific
EM&A Manual, approval for carrying out impact monitoring could not be
obtained from the principal of the school. Permission on setting up and
carrying out impact monitoring works at nearby sensitive receivers, like
Caribbean Coast and Coastal Skyline, was also sought. However, approvals for carrying out
impact monitoring works within their premises were not obtained. Impact air
quality monitoring was conducted at site boundary of the site office area in
Works Area WA2 (AMS3A) respectively. Same baseline and Action Level for air
quality, as derived from the baseline monitoring data recorded at Ho Yu
College, was adopted for this alternative air quality location.
2.3.2 Reference is made to ET¡¦s
proposal of the omission
of air monitoring station (AMS 6) dated on 1 November
2012 and EPD¡¦s
letter dated on 19 November 2012 regarding the conditional approval
of the proposed omission
of air monitoring station (AMS 6) for Contract No. HY/2010/02. The
aforesaid omission of
Monitoring Station AMS6 is effective since 19 November 2012.
2.3.3 Figure 2 shows the locations of
monitoring stations. Table 2.2 describes the details of the monitoring
stations.
Table
2.2 Locations
of Impact Air Quality Monitoring Stations
Monitoring Station |
Location |
Description |
AMS2 |
Tung
Chung Development
Pier |
Rooftop
of the premise |
AMS3A |
Site
Boundary of Site Office Area
at Works Area WA2 |
On ground at the area boundary |
AMS6* |
Dragonair/CNAC (Group) Building |
On ground at boundary of the premise |
AMS7 |
Hong
Kong SkyCity Marriott
Hotel |
On ground at boundary of the premise |
#Remarks: Reference is made to EPD conditional
approval of the omission of air monitoring station (AMS 6) for the project. The
omission will be effective on 19 November 2012.
2.4
Monitoring Parameters,
Frequency and Duration
2.4.1 Table 2.3 summarizes the
monitoring parameters, frequency and duration of impact TSP monitoring.
Table
2.3 Air
Quality Monitoring Parameters, Frequency and Duration
Parameter |
Frequency and Duration |
1-hour
TSP |
Three times every 6 days while
the highest dust impact was expected |
24-hour
TSP |
Once every 6 days |
2.5.1 24-hour TSP Monitoring
(a)
The HVS was installed in the vicinity
of the air sensitive receivers. The
following criteria were considered in the installation of the HVS.
(i)
A horizontal platform with appropriate
support to secure the sampler against gusty wind was provided.
(ii)
No two samplers should be placed
less than 2 meters apart.
(iii)
The distance between the HVS and any
obstacles, such as buildings, was at least twice the height that the obstacle
protrudes above the HVS.
(iv)
A minimum of 2 meters separation from
walls, parapets and penthouse for rooftop sampler.
(v)
A minimum of 2 meters separation
from any supporting structure, measured horizontally is required.
(vi)
No furnace or incinerator flues nearby.
(vii)
Airflow around the sampler was
unrestricted.
(viii)
Permission was obtained to set up the
samplers and access to the monitoring stations.
(ix)
A secured supply of electricity was
obtained to operate the samplers.
(x)
The sampler was located more than 20
meters from any dripline.
(xi)
Any wire fence and gate, required to
protect the sampler, did not obstruct the monitoring process.
(xii)
Flow control accuracy was kept within
¡Ó2.5% deviation over 24-hour sampling period.
(b)
Preparation of Filter Papers
(i)
Glass fibre filters, G810 were labelled
and sufficient filters that were clean and without pinholes were selected.
(ii)
All filters were equilibrated in the
conditioning environment for 24 hours before weighing. The conditioning
environment temperature was around
(iii)
All filter papers were prepared and
analysed by ALS Technichem (HK) Pty Ltd., which is a HOKLAS accredited
laboratory and has comprehensive quality assurance and quality control
programmes.
(c)
Field Monitoring
(i)
The power supply was checked to ensure
the HVS works properly.
(ii)
The filter holder and the area
surrounding the filter were cleaned.
(iii)
The filter holder was removed by
loosening the four bolts and a new filter, with stamped number upward, on a
supporting screen was aligned carefully.
(iv)
The filter was properly aligned on the
screen so that the gasket formed an airtight seal on the outer edges of the
filter.
(v)
The swing bolts were fastened to hold
the filter holder down to the frame.
The pressure applied was sufficient to avoid air leakage at the edges.
(vi)
Then the shelter lid was closed and was
secured with the aluminum strip.
(vii)
The HVS was warmed-up for about 5
minutes to establish run-temperature conditions.
(viii)
A new flow rate record sheet was set
into the flow recorder.
(ix)
On site temperature and atmospheric
pressure readings were taken and the flow rate of the HVS was checked and
adjusted at around 1.1 m3/min, and complied with the range specified
in the updated EM&A Manual (i.e. 0.6-1.7 m3/min).
(x)
The programmable digital timer was set
for a sampling period of 24 hrs, and the starting time, weather condition and
the filter number were recorded.
(xi)
The initial elapsed time was recorded.
(xii)
At the end of sampling, on site
temperature and atmospheric pressure readings were taken and the final flow
rate of the HVS was checked and recorded.
(xiii)
The final elapsed time was recorded.
(xiv)
The sampled filter was removed
carefully and folded in half length so that only surfaces with collected
particulate matter were in contact.
(xv)
It was then placed in a clean plastic
envelope and sealed.
(xvi)
All monitoring information was recorded
on a standard data sheet.
(xvii)
Filters were then sent to ALS
Technichem (HK) Pty Ltd. for analysis.
(d)
Maintenance and Calibration
(i)
The HVS and its accessories were
maintained in good working condition, such as replacing motor brushes routinely
and checking electrical wiring to ensure a continuous power supply.
(ii)
5-point calibration of the HVS was
conducted using TE
(iii)
Calibration certificate of the HVSs are
provided in Appendix E.
2.5.2 1-hour TSP Monitoring
(a)
Measuring Procedures
The measuring procedures of the
1-hour dust meter were in accordance with the Manufacturer¡¦s Instruction Manual
as follows:-
(i)
Turn the power on.
(ii)
Close the air collecting opening cover.
(iii)
Push the ¡§TIME SETTING¡¨ switch to [BG].
(iv)
Push ¡§START/STOP¡¨ switch to perform
background measurement for 6 seconds.
(v)
Turn the knob at SENSI ADJ position to
insert the light scattering plate.
(vi)
Leave the equipment for 1 minute upon
¡§SPAN CHECK¡¨ is indicated in the display.
(vii)
Push ¡§START/STOP¡¨ switch to perform
automatic sensitivity adjustment. This measurement takes 1 minute.
(viii)
Pull out the knob and return it to
MEASURE position.
(ix)
Push the ¡§TIME SETTING¡¨ switch the time
set in the display to 3 hours.
(x)
Lower down the air collection opening
cover.
(xi)
Push ¡§START/STOP¡¨ switch to start
measurement.
(b)
Maintenance and Calibration
(i)
The 1-hour TSP meter was calibrated at
1-year intervals against a continuous particulate TEOM Monitor, Series 1400ab.
Calibration certificates of the Laser Dust Monitors are provided in Appendix E.
(ii)
1-hour validation checking of the TSP
meter against HVS is carried out on half-year basis at the air quality monitoring
locations.
2.6
Monitoring
Schedule for the Reporting Month
2.6.1
The schedule for air quality monitoring in July 2013 is provided in Appendix F.
2.7.1 The monitoring results for
1-hour TSP and 24-hour TSP are summarized in Table 2.4 and 2.5 respectively.
Detailed impact air quality monitoring results are presented in Appendix G.
Table
2.4 Summary
of 1-hour TSP Monitoring Results in the Reporting Period
|
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
AMS2 |
78 |
75 ¡V
84 |
374 |
500 |
AMS3A |
79 |
75 ¡V 84 |
368 |
500 |
AMS7 |
77 |
73 ¡V
83 |
370 |
500 |
Table 2.5 Summary
of 24-hour TSP Monitoring Results in the Reporting Period
|
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
AMS2 |
14 |
10 ¡V 16 |
176 |
260 |
AMS3A |
46 |
15 ¡V 154 |
167 |
260 |
AMS7 |
25 |
18 ¡V 45 |
183 |
260 |
2.7.2 The major dust source in the
reporting period included construction activities from the Project,
construction activities by other contacts, as well as nearby traffic emissions.
2.7.3 All 1-hour TSP
results
and 24-hour TSP
results were below the Action and Limit Level at all monitoring locations in the
reporting month.
2.7.4 The event action plan is annexed
in Appendix L.
2.7.5 Meteorological information
collected from the wind station during the monitoring periods on the monitoring
dates, as shown in Figure 2, including wind speed and wind direction, is
annexed in Appendix H.
3.1.1 In accordance with the Project
Specific EM&A Manual, impact noise monitoring was conducted for at least
once per week during the construction phase of the Project. The Action and
Limit level of the noise monitoring is provided in Appendix D.
3.2.1 Noise monitoring was performed
using sound level meter at each designated monitoring station. The sound level meters deployed comply
with the International Electrotechnical Commission Publications (IEC) 651:1979
(Type 1) and 804:1985 (Type 1) specifications. Acoustic calibrator was deployed to
check the sound level meters at a known sound pressure level. Brand and model of the equipment is
given in Table 3.1.
Table 3.1 Noise
Monitoring Equipment
Equipment |
Brand and Model |
Integrated Sound Level Meter |
Rion NL-31 |
Acoustic Calibrator |
Rion NC-73 |
3.3.1 Monitoring locations NMS2 was
set up at the proposed locations in accordance with Project Specific EM&A
Manual. However, for monitoring location NMS3 (Ho Yu College), as proposed in
the Project Specific EM&A Manual, approval for carrying out impact
monitoring could not be obtained from the principal of the school. Permission
on setting up and carrying out impact monitoring works at nearby sensitive
receivers, like Caribbean Coast and Coastal Skyline, was also sought. However, approvals for carrying out
impact monitoring works within their premises were not obtained. Impact noise
monitoring was conducted at site boundary of the site office area in Works Area
WA2 (NMS3A) respectively. Same baseline noise level (as derived from the
baseline monitoring data recorded at Ho Yu College) and Limit Level were
adopted for this alternative noise monitoring location.
Remarks: Monitoring
3.3.2 Figure 2 shows the locations of
the monitoring stations. Table 3.2 describes the details of the monitoring
stations.
Table 3.2 Locations
of Impact Noise Monitoring Stations
Monitoring Station |
Location |
Description |
NMS2 |
Seaview Crescent Tower 1 |
Free-field
on the rooftop of the premise |
NMS3A |
Site Boundary of Site Office Area at Works Area
WA2 |
Free-field on
ground at the area boundary. |
3.4
Monitoring Parameters,
Frequency and Duration
3.4.1
Table 3.3 summarizes the monitoring parameters, frequency and duration
of impact noise monitoring.
Table
3.3 Noise
Monitoring Parameters, Frequency and Duration
Parameter |
Frequency
and Duration |
30-mins measurement at each monitoring station between 0700 and
1900 on normal weekdays (Monday to Saturday). Leq, L10
and L90 would be recorded. |
At least once per week |
3.5.1 Monitoring Procedure
(a)
The sound level meter was set on a
tripod at a height of
(b)
All
measurement at NMS3A were free field measurements in the
reporting month at NMS3A. A
correction of +3 dB(A) shall be made to the free field measurements.
(c)
The battery condition was checked to
ensure the correct functioning of the meter.
(d)
Parameters such as frequency weighting,
the time weighting and the measurement time were set as follows:-
(i)
frequency weighting: A
(ii)
time weighting: Fast
(iii)
time measurement: Leq(30-minutes)
during non-restricted hours i.e. 07:00 ¡V 1900 on normal weekdays.
(e)
Prior to and after each noise
measurement, the meter was calibrated using the acoustic calibrator for 94dB(A)
at 1000 Hz. If the difference in
the calibration level before and after measurement was more than 1 dB(A), the
measurement would be considered invalid and repeat of noise measurement would
be required after re-calibration or repair of the equipment.
(f)
During the monitoring period, the Leq,
L10 and L90 were recorded. In addition, site conditions and noise
sources were recorded on a standard record sheet.
(g)
Noise measurement was paused during
periods of high intrusive noise (e.g. dog barking, helicopter noise) if
possible. Observations were recorded when intrusive noise was unavoidable.
(h)
Noise monitoring was cancelled in the
presence of fog, rain, wind with a steady speed exceeding
3.5.2 Maintenance and Calibration
(a)
The microphone head of the sound level
meter was cleaned with soft cloth at regular intervals.
(b)
The meter and calibrator were sent to
the supplier or HOKLAS laboratory to check and calibrate at yearly intervals.
(c)
Calibration certificates of the sound
level meters and acoustic calibrators are provided in Appendix E.
3.6
Monitoring Schedule
for the Reporting Month
3.6.1 The schedule for construction
noise monitoring in July 2013 is provided in Appendix F.
3.7.1 The monitoring results for
construction noise are summarized in Table 3.4 and the monitoring data is
provided in Appendix I.
Table 3.4 Summary
of Construction Noise Monitoring Results in the Reporting Period
|
Average, dB(A), Leq (30 mins) |
Range, dB(A), Leq (30 mins) |
Limit Level, dB(A), Leq (30 mins) |
NMS2 |
65 |
63 ¡V 67* |
75 |
NMS3A |
62 |
57 ¡V 67* |
70^ |
*+3dB(A) Façade correction
included
^
Daytime noise Limit Level of 70 dB(A)
applies to education institutions, while 65dB(A) applies during school
examination period.
3.7.2 No Action
or Limit Level
Exceedance of construction noise was recorded in the reporting month.
3.7.3 Major noise sources during the
noise monitoring included construction activities of the Project, construction
activities by other contracts and nearby traffic noise.
3.7.4 The event action plan is annexed
in Appendix L.
4.1.1 Impact water quality monitoring
was carried out to ensure that any deterioration of water quality was detected,
and that timely action was taken to rectify the situation. For impact water quality monitoring,
measurements were taken in accordance with the Project Specific EM&A
Manual. Appendix D shows the established Action/Limit Levels for the
environmental monitoring works.
4.2.1 Table 4.1 summarises the
equipment used in the impact water quality monitoring programme.
Table 4.1 Water
Quality Monitoring Equipment
Equipment |
Brand
and Model |
Dissolved
Oxygen (DO) and Temperature Meter, Salinity Meter and Turbidimeter |
YSI
Model 6820 |
pH
Meter |
YSI
Model 6820 or Thermo Orion 230A+ |
Positioning
Equipment |
JRC
DGPS 224 Model JLR-4341 with J-NAV 500 Model NWZ4551 |
Water
Depth Detector |
Eagle
Cuda-168 |
Water
Sampler |
Kahlsio
Water Sampler (Vertical) 2.2 L with messenger |
4.3
Monitoring Parameters,
Frequency and Duration
4.3.1
Table 4.2 summarises the monitoring parameters, frequency and monitoring
depths of impact water quality monitoring as required in the Project Specific
EM&A Manual.
Table 4.2 Impact
Water Quality Monitoring Parameters and Frequency
Monitoring
Stations |
Parameter,
unit |
Frequency |
No. of
depth |
Impact Stations: IS5, IS(Mf)6, IS7, IS8, IS(Mf)9, IS10, IS(Mf)11, IS(Mf)16,
IS17 Control/Far
Field Stations: CS(Mf)3, CS(Mf)5, CS4, CS6, CSA Sensitive Receiver
Stations: SR3-SR7, SR10A&SR10B |
¡P
Depth, m ¡P
Temperature, oC ¡P
Salinity, ppt ¡P
Dissolved Oxygen (DO), mg/L ¡P
DO Saturation, % ¡P
Turbidity, NTU ¡P
pH ¡P
Suspended Solids (SS), mg/L |
Three times per
week during mid-ebb and mid-flood tides (within ¡Ó 1.75 hour of the predicted
time) |
3 (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). |
4.4.1 In accordance with the Project
Specific EM&A Manual, twenty-one stations (9 Impact Stations, 7 Sensitive
Receiver Stations and 5 Control/Far Field Stations) were designated for impact
water quality monitoring. The nine Impact Stations (IS) were chosen on the
basis of their proximity to the reclamation and thus the greatest potential for
water quality impacts, the seven Sensitive Receiver Stations (SR) were chosen
as they are close to the key sensitive receives and the five Control/ Far Field
Stations (CS) were chosen to facilitate comparison of the water quality of the
IS stations with less influence by the Project/ ambient water quality
conditions.
4.4.2 Due to safety concern and topographical
condition of the original locations of SR4 and SR10B, alternative impact water
quality monitoring stations, naming as SR4 (N) and SR10B (N), were adopted,
which are situated in vicinity of the original impact water quality monitoring
stations (SR4 and SR10B) and could be reachable.
4.4.3 Same baseline and Action Level
for water quality, as derived from the baseline monitoring data recorded, were
adopted for these alternative impact water quality monitoring stations.
4.4.4 The locations of these
monitoring stations are summarized in Table 4.3 and depicted in Figure 3.
Table 4.3 Impact
Water Quality Monitoring Stations
Station |
Description |
East |
North |
IS5 |
Impact Station (Close to HKBCF construction site) |
811579 |
817106 |
IS(Mf)6 |
Impact Station (Close to HKBCF construction site) |
812101 |
817873 |
IS7 |
Impact Station (Close to HKBCF construction site) |
812244 |
818777 |
IS8 |
Impact Station (Close to HKBCF construction site) |
814251 |
818412 |
IS(Mf)9 |
Impact Station (Close to HKBCF construction site) |
813273 |
818850 |
IS10 |
Impact Station (Close to HKBCF construction site) |
812577 |
820670 |
Impact Station (Close to HKBCF construction site) |
813562 |
820716 |
|
Impact Station (Close to HKBCF construction site) |
814328 |
819497 |
|
IS17 |
Impact Station (Close to HKBCF construction site) |
814539 |
820391 |
SR3 |
Sensitive receivers (San Tau SSSI) |
810525 |
816456 |
SR4(N) |
Sensitive receivers (Tai Ho) |
814705 |
817859 |
SR5 |
Sensitive receivers (Artificial Reef in NE Airport) |
811489 |
820455 |
SR6 |
Sensitive receivers (Sha Chau and Lung Kwu Chau Marine
Park) |
805837 |
821818 |
SR7 |
Sensitive receivers (Tai Mo Do) |
814293 |
821431 |
SR10A |
Sensitive receivers (Ma Wan FCZ)1 |
823741 |
823495 |
SR10B(N) |
Sensitive receivers (Ma Wan FCZ)2 |
823683 |
823187 |
Control Station |
809989 |
821117 |
|
Control Station |
817990 |
821129 |
|
CS4 |
Control Station |
810025 |
824004 |
CS6 |
Control Station |
817028 |
823992 |
CSA |
Control Station |
818103 |
823064 |
4.5.1 Instrumentation
(a)
The in-situ water quality parameters,
viz. dissolved oxygen, temperature, salinity, turbidity and pH, were measured
by multi-parameter meters (i.e. Model YSI 6820 CE-C-M-Y) and pH meter (i.e. Thermo Orion 230A+) respectively.
4.5.2 Operating/Analytical Procedures
(a)
Digital Differential Global Positioning Systems (DGPS) were
used to ensure that the correct location was selected prior to sample
collection.
(b)
Portable, battery-operated echo
sounders were used for the determination of water depth at each designated
monitoring station.
(c)
All in-situ measurements were taken at
3 water depths, 1 m
below water surface, mid-depth and 1 m above sea bed, except where the water
depth was less than 6 m, in which case the mid-depth station was omitted.
Should the water depth be less than 3 m, only the mid-depth station was
monitored.
(d)
At each measurement/sampling depth, two
consecutive in-situ monitoring (DO concentration and saturation, temperature,
turbidity, pH, salinity) and water sample for SS. The probes were retrieved out
of the water after the first measurement and then re-deployed for the second
measurement. Where the difference in the value between the first and second
readings of DO or turbidity parameters was more than 25% of the value of the
first reading, the reading was discarded and further readings were taken.
(e)
Duplicate samples from each independent
sampling event were collected for SS measurement. Water samples were collected
using the water samplers and the samples were stored in high-density polythene
bottles. Water samples collected were well-mixed in the water sampler prior to
pre-rinsing and transferring to sample bottles. Sample bottles were pre-rinsed
with the same water samples. The sample bottles were then be packed in
cool-boxes (cooled at 4oC without being frozen), and delivered to
ALS Technichem (HK) Pty Ltd. for the analysis of suspended solids concentrations.
The laboratory determination work would be started within 24 hours after
collection of the water samples. ALS
Technichem (HK) Pty Ltd. is a HOKLAS accredited laboratory and has
comprehensive quality assurance and quality control programmes. For QA/QC
procedures, one duplicate samples of every batch of 20 samples was
analyzed.
(f)
The analysis method and reporting and
detection limit for SS is shown in Table 4.4.
Table 4.4 Laboratory
Analysis for Suspended Solids
Parameters |
Instrumentation |
Analytical
Method |
Reporting
Limit |
Detection
Limit |
Suspended
Solid (SS) |
Weighting |
APHA 2540-D |
0.5mg/L |
0.5mg/L |
(g)
Other relevant data were recorded,
including monitoring location / position, time, water depth, tidal stages,
weather conditions and any special phenomena or work underway at the
construction site in the field log sheet for information.
4.5.3 Maintenance and Calibration
(a)
All in situ monitoring instruments
would be calibrated and calibrated by ALS Technichem (HK) Pty Ltd. before use
and at 3-monthly intervals throughout all stages of the water quality monitoring programme. Calibration details are provided in
Appendix E.
(b)
The dissolved oxygen probe of YSI 6820
was calibrated by wet bulb method. Before the calibration routine, the sensor
for dissolved oxygen was thermally equilibrated in water-saturated air.
Calibration cup is served as a calibration chamber and it was loosened from
airtight condition before it is used for the calibration. Calibration at ALS
Technichem (HK) Pty Ltd. was carried out once every three months in a water
sample with a known concentration of dissolved oxygen. The sensor was immersed
in the water and after thermal equilibration, the known mg/L value was keyed in
and the calibration was carried out automatically.
(c)
The turbidity probe of YSI 6820 is
calibrated two times a month. A zero check in distilled water was performed
with the turbidity probe of YSI 6820 once per monitoring day. The probe will be
calibrated with a solution of known NTU at ALS Technichem (HK) Pty Ltd. once
every three months.
4.6
Monitoring Schedule for the Reporting Month
4.6.1 The schedule for impact water
quality monitoring in July 2013 is provided in Appendix F.
Remark: Due to adverse weather on 1 July 2013, the water quality
monitoring scheduled on mid-flood tide was cancelled.
4.7.1 Impact water quality monitoring was
conducted at all designated monitoring stations in the reporting month. Except
Impact water quality monitoring at sampling location IS(Mf)9. Sampling location
IS(Mf)9 was found enclosed by silt curtain during the reporting month. Samples
were taken about 140 meters away from IS(Mf)9. The sampling location¡¦s
coordination (East 813226, North 818708) was recorded. The
Contractor was advised to take corrective actions to the temporary arrangement
of the perimeter silt curtain as soon as possible.
4.7.2 Impact water quality monitoring
results and graphical presentations are provided in Appendix J.
4.7.3 No
water quality exceedance was recorded in the reporting month.
4.7.4
Total of three (3) Action Level
Exceedances at measured
Suspended Solids (mg/L) were recorded during the reporting month. The number of exceedances recorded in the reporting month at each impact
station is summarized in Table 4.5.
Table 4.5 Summary
of Water Quality Exceedances
Exceedance Level |
DO (S&M) |
DO (Bottom) |
Turbidity |
SS |
Total |
||||||
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
||
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)6 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS7 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS8 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)9 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS10 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1
(26 July 13) |
0 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)11 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)16 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS17 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR3 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR4(N) |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR5 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2
(26 and 31 July 13) |
0 |
2 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR6 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR7 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR10A |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
SR10B (N) |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Total |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3 |
|
|
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Note: S: Surface;
and
M:
Mid-depth.
4.7.5 Two (2)
Action Level exceedances at measured Suspended Solids (mg/L) where recorded on 26 July 2013 during mid-flood tide
at monitoring station IS10 and SR5. For Action Level exceedances at
measured Suspended Solids (mg/L), 23.9 mg/L and 23.8 mg/L were recorded at Monitoring Station IS10 and SR5 respectively.
4.7.5.1 For
works activities carried out on 26 July 2013, please refer to above layout map
which shows the locations active works.
4.7.5.2 Same
type of works were carried out at the same location on 24 and 29 July 13 but
Suspended Solids values recorded at IS10 and SR5 on 24 and 29 July 13 are all
below the Action and Limit Level during the same tide on the same day which
indicates project works are unlikely to contribute to the action level
exceedance recorded at IS10 and SR5.
4.7.5.3 Suspended
solids values recorded at Monitoring Stations CS(Mf)3 located downstream of
monitoring station IS10 and SR5 during mid-flood tide were below the action and
limit level.
4.7.5.1 No
silt plume was observed flowing from the inside of the perimeter silt curtain
to the outside of the perimeter silt curtain when monitoring works were
conducted IS10 on 26 July 13 during mid flood tide.
4.7.5.2 Turbidity
measurements results at IS10 and SR5 were 14.8(NTU) and 13.7(NTU) respectively
during flood tide and are all below the Action and Limit Level. It is
considered that the turbidity recorded at IS10 and IS(Mf)11 were not adversely
affected by active works.
4.7.5.3 The
exceedances were likely due to local effects in the vicinity of IS10 and SR5.
4.7.5.4 The
exceedances were considered as non-Project related.
4.7.5.5 Nevertheless,
the Contractor was reminded to ensure provision of ongoing maintenance to the
silt curtains and to carry out maintenance work once defects were found.
4.7.5.6 Maintenance
work of the silt curtain was carried out by the Contractor on a daily basis
except Sunday and public holiday.
4.7.6 One (1)
Action Level exceedances at measured Suspended Solids (mg/L) where recorded on 31 July 2013 during mid-flood tide
at monitoring station SR5. For Action Level exceedance at measured
Suspended Solids (mg/L), 23.6 mg/L was recorded.
4.7.6.1 For
works activities carried out on 31 July 2013, please refer to above layout map
which shows the locations active works.
4.7.6.1 Same
type of works were carried out at the same location on 29 July 13 but Suspended
Solids values recorded at SR5 on 29 July 13 is below the Action and Limit Level
during the same tide which indicates project works is unlikely to contribute to
the limit level exceedance recorded at SR5.
4.7.6.2 Monitoring
Stations IS10 and IS(Mf)11 which are considered downstream and closer to the
active works than monitoring Station SR5. Since the Suspended Solids values
recorded at IS10 and IS(Mf)11 are all below the Action and Limit Level during
same tide on the same day which shows that the water quality noted at IS10 and IS(Mf)11 which are downstream
of and closer to active works during flood tide than SR5 were not adversely
affected by active works. Hence it is considered that the exceedance recorded
at SR5 is not related to the Project.
4.7.6.3 The
exceedance was likely due to local effects in the vicinity of SR5.
4.7.6.4 The
exceedance was considered as non-Project related.
4.7.6.5 Nevertheless,
the Contractor was reminded to ensure provision of ongoing maintenance to the
silt curtains and to carry out maintenance work once defects were found.
4.7.6.6 Maintenance
work of the silt curtain was carried out by the Contractor on a daily basis
except Sunday and public holiday.
4.7.7 The event action plan is annexed
in Appendix L.
5.1.2 This ¡¥Impact Monitoring¡¦ follows
several months of ¡¥Baseline Monitoring¡¦ so similar survey methodologies have
been adopted to facilitate comparisons between datasets. Further, the data collected are
compatible with, and are available for, incorporation into the data set managed
by the Agriculture, Fisheries and Conservation Department (AFCD) as part of
Hong Kong¡¦s long term Marine Mammal Monitoring Programme.
5.2
Monitoring Equipment
5.2.1 Table 5.1 summarises the
equipment used for the impact dolphin monitoring.
Table
5.1 Dolphin
Monitoring Equipment
Equipment |
Model |
Commercially licensed motor vessel |
15m
in length with a 4.5m viewing platform |
Global Positioning System (GPS) x2 |
Integrated into T7000 Garmin GPS Map 78C |
Computers
(T7000 Tablet, Intel Atom) |
Windows 7/MSO 13 Logger
|
Camera
|
Nikon D90 300m 2.8D fixed focus Nikon D90 20-400m zoom lens |
Laser
Rangefinder |
Infinitor
LRF1000/ Kings 950 |
Marine
Binocular x3 |
Nexus 7 x 50 marine binocular with compass and
reticules Fujinon 7 x 50 marine
binocular with compass and reticules |
5.3
Monitoring Frequency
and Conditions
5.3.1 Dolphin monitoring is conducted
twice per month in each survey area.
5.3.2 Dolphin monitoring is conducted only
when visibility is good (e.g., over 1km) and the sea condition is at a Beaufort
Sea State of 4 or better.
5.3.3 When thunder storm, black rain
or typhoon warnings are in force, all survey effort is stopped.
5.4
Monitoring Methodology
and Location
5.4.1 The impact dolphin monitoring is
vessel-based and combines line-transect and photo-ID methodology. The survey follows pre-set and fixed
transect lines in the two areas defined by AFCD as:
Northeast
Lantau survey area; and
Northwest
Lantau survey area.
5.4.2 The co-ordinates for the
transect lines and layout map have been provided by AFCD and are shown in Table
5.2 and Figure 4.
Table
5.2 Impact
Dolphin Monitoring Line Transect Co-ordinates (Provided by AFCD)
|
HK Grid System |
Long Lat in WGS84 |
||
ID |
X |
Y |
Long |
Lat |
1 |
804671 |
814577 |
113.870308 |
22.269741 |
1 |
804671 |
831404 |
113.869975 |
22.421696 |
2 |
805475 |
815457 |
113.878087 |
22.277704 |
2 |
805477 |
826654 |
113.877896 |
22.378814 |
3 |
806464 |
819435 |
113.887615 |
22.313643 |
3 |
806464 |
822911 |
113.887550 |
22.345030 |
4 |
807518 |
819771 |
113.897833 |
22.316697 |
4 |
807518 |
829230 |
113.897663 |
22.402113 |
5 |
808504 |
820220 |
113.907397 |
22.320761 |
5 |
808504 |
828602 |
113.907252 |
22.396462 |
6 |
809490 |
820466 |
113.916965 |
22.323003 |
6 |
809490 |
825352 |
113.916884 |
22.367128 |
7 |
810499 |
820690 |
113.926752 |
22.325043 |
7 |
810499 |
824613 |
113.926688 |
22.360464 |
8 |
811508 |
820847 |
113.936539 |
22.326475 |
8 |
811508 |
824254 |
113.936486 |
22.357241 |
9 |
812516 |
820892 |
113.946329 |
22.326894 |
9 |
812516 |
824254 |
113.946279 |
22.357255 |
10* |
813525 |
818270 |
113.956156 |
22.303225 |
10* |
813525 |
824657 |
113.956065 |
22.360912 |
11 |
814556 |
818449 |
113.966160 |
22.304858 |
11 |
814556 |
820992 |
113.966125 |
22.327820 |
12 |
815542 |
818807 |
113.975726 |
22.308109 |
12 |
815542 |
824882 |
113.975647 |
22.362962 |
13 |
816506 |
819480 |
113.985072 |
22.314192 |
13 |
816506 |
824859 |
113.985005 |
22.362771 |
14 |
817537 |
820220 |
113.995070 |
22.320883 |
14 |
817537 |
824613 |
113.995018 |
22.360556 |
15 |
818568 |
820735 |
114.005071 |
22.325550 |
15 |
818568 |
824433 |
114.005030 |
22.358947 |
16 |
819532 |
821420 |
114.014420 |
22.331747 |
16 |
819532 |
824209 |
114.014390 |
22.356933 |
17 |
820451 |
822125 |
114.023333 |
22.338117 |
17 |
820451 |
823671 |
114.023317 |
22.352084 |
18 |
821504 |
822371 |
114.033556 |
22.340353 |
18 |
821504 |
823761 |
114.033544 |
22.352903 |
19 |
822513 |
823268 |
114.043340 |
22.348458 |
19 |
822513 |
824321 |
114.043331 |
22.357971 |
20 |
823477 |
823402 |
114.052695 |
22.349680 |
20 |
823477 |
824613 |
114.052686 |
22.360610 |
21 |
805476 |
827081 |
113.877878 |
22.382668 |
21 |
805476 |
830562 |
113.877811 |
22.414103 |
22 |
806464 |
824033 |
113.887520 |
22.355164 |
22 |
806464 |
829598 |
113.887416 |
22.405423 |
23 |
814559 |
821739 |
113.966142 |
22.334574 |
23 |
814559 |
824768 |
113.966101 |
22.361920 |
*Remark:
Due to the presence of deployed silt curtain systems at the site boundaries of
the Project, some of the transect lines shown in Figure 5 could not be fully
surveyed during the regular survey. Transect 10 is reduced from 6.4km to
approximately 3.6km in length due to the HKBCF construction site. Therefore the
total transect length for both NEL and NWL combined is reduced to approximately
111km.
5.5.1 The study area incorporates 23
transects which are to be surveyed twice per month. Each survey day lasts approximately 9
hours.
5.5.2 The survey vessel departs from
Tung Chung Development Pier, Tsing Yi Public Pier or the nearest safe and
convenient pier.
5.5.3 When the vessel reaches the
start of a transect line, ¡§on effort¡¨ survey begins. Areas between transect
lines and traveling to and from the study area are defined as ¡§off effort¡¨.
5.5.4 The transect line is surveyed at
a speed of 6-8 knots (11-14 km/hr). For the sake of safety, the speed was
sometimes a bit slower to avoid collision with other vessels. During some periods, tide and current
flow in the survey areas exceeds 7 knots which can affect survey speed. There
are a minimum of four marine mammal observers (MMOs) present on each survey,
rotating through four positions, observers (2), data recorder (1) and ¡¥rest¡¦
(1). Rotations occur every 30 minutes or at the end of dolphin encounters. The data recorder records effort,
weather and sightings data directly onto the programme Logger
and is not part of the observer team. The observers search with
naked eye and binoculars between 90¢X and 270¢X abeam (bow being 0¢X).
5.5.5 When a group of dolphins is
sighted, position, bearing and distance data are recorded immediately onto the
computer and, after a short observation, an estimate made of group size. These parameters are linked to the
time-GPS-ships data which are automatically stored in the programme Logger
throughout the survey period. In
this manner, information on heading, position, speed, weather, effort and
sightings are stored in a format suitable for use with DISTANCE software for
subsequent line transect analyses.
5.5.6 Once the vessel leaves the
transect line, it is deemed to be ¡§off effort¡¨. The dolphins are approached
with the purpose of taking high resolution pictures for proper
photo-identification of individual CWD.
Attempts to photograph all dolphins in the group are made. Both the left and right hand sides of
the dorsal fin area of each dolphin in the group are photographed, if
possible. On finishing
photographing, the vessel will return to the transect line at the point of
departure and ¡§on effort¡¨ survey is resumed.
5.5.7 Sightings which are made while
on the transect line are referred to as "on effort sightings", while
not on the actual transect line are referred to as an ¡§opportunistic sightings¡¨
(e.g. another group of dolphins is sighted while travelling back to the
transect line). Only ¡§on effort
sightings¡¨ can be used in analyses which require effort or rate quantification,
e.g., encounter rate per 100km searched.
This is also how ¡§on effort sightings¡¨ are treated in the baseline
report. ¡§Opportunistic sightings¡¨
provide additional information on individual habitat use and population
distribution and they are noted accordingly.
5.5.8 As time and GPS data are
automatically logged throughout the survey and are linked to sightings data
input, start and end times of encounters and deviation from the transect lines
are recorded and can be subsequently reviewed.
5.6
Monitoring Schedule
for the Reporting Month
5.6.1
The schedule for dolphin monitoring in July 2013 is provided in Appendix F.
5.7
Results and
Observations
5.7.1
Dolphin surveys were conducted on 8, 9, 23 and 31 July 2013. In summary, a total of 222.0km of ¡§on effort¡¨
survey was conducted, 100% of ¡§on effort¡¨ survey was conducted under favourable conditions
(Beaufort Sea State 3 or better).
The details are shown below:-
5.7.2
The effort summary and sightings data are shown in Tables 5.3 and 5.4,
respectively. The survey efforts conducted in July 2013 are plotted in Figure 5a-c. For Table 5.3, only on-effort
information is included. Transects conducted in all Beaufort Sea State are
included. Compared to previous monthly reports, the whole number Beaufort Sea
State scale is used so as to ease comparison with other dolphin monitoring
reports.
Table 5.3 Impact Dolphin
Monitoring Survey Effort Summary, Effort by Area and Beaufort Sea State
Survey |
Date |
Area |
Beaufort |
Effort (km) |
Total Distance
Travelled (km) |
1 |
08-07-13 |
NWL |
1 |
29.9 |
63.5 |
08-07-13 |
NWL |
2 |
22.1 |
||
08-07-13 |
NWL |
3 |
11.5 |
||
09-07-13 |
NWL |
1 |
10.0 |
47.7 |
|
09-07-13 |
NEL |
1 |
27.2 |
||
09-07-13 |
NEL |
2 |
9.2 |
||
09-07-13 |
NEL |
3 |
1.3 |
||
2 |
23-07-13 |
NWL |
0 |
3.8 |
58.4 |
23-07-13 |
NWL |
1 |
32.6 |
||
23-07-13 |
NWL |
2 |
22.0 |
||
31-07-13 |
NWL |
2 |
12.3 |
52.4 |
|
31-07-13 |
NWL |
3 |
3.2 |
||
31-07-13 |
NEL |
1 |
2.0 |
||
31-07-13 |
NEL |
2 |
25.9 |
||
31-07-13 |
NEL |
3 |
9.0 |
||
TOTAL in July 2013 |
222.0 |
*Remark: Surveys
conduct under Beaufort Sea State 3 or below are considered
as under favourable condition.
Table 5.4 Impact Dolphin
Monitoring Survey Details in July 2013
Date |
Location |
No. Sightings ¡§on effort¡¨ |
No. Sightings ¡§opportunistic¡¨ |
08-07-13 |
NW L |
5 |
6 |
NEL |
0 |
0 |
|
09-07-13 |
NW L |
0 |
0 |
NEL |
0 |
0 |
|
23-07-13 |
NW L |
6 |
0 |
NEL |
0 |
0 |
|
31-07-13 |
NW L |
0 |
0 |
NEL |
3 |
1 |
|
TOTAL in July 2013 |
14 |
7 |
Table 5.5
The Encounter Rate of Number of Dolphin
Sightings & Total Number of Dolphins per Area^
Encounter Rate of Number of Dolphin
Sightings (STG)* |
||||||
Date |
NEL Track |
NWL Track |
NEL Sightings |
NWL Sightings |
NEL Encounter Rate |
NWL Encounter Rate |
08 - 09/07/2013 |
37.7 km |
73.5 km |
0 |
5 |
0.0 |
6.8 |
23 & 31/07/2013 |
36.9 km |
73.9 km |
3 |
6 |
8.1 |
8.1 |
Encounter Rate of Total Number of Dolphins (ANI)** |
||||||
Date |
NEL Track |
NWL Track |
NEL Dolphins |
NWL Dolphins |
NEL Encounter Rate |
NWL Encounter Rate |
08 - 09/07/2013 |
37.7 km |
73.5 km |
0 |
27 |
0.0 |
36.7 |
23 & 31/07/2013 |
36.9 km |
73.9 km |
3 |
15 |
8.1 |
20.3 |
* Encounter Rate of
Number of Dolphin Sightings (STG) presents encounter rates in terms of
groups per 100km.
** Encounter Rate
of Total Number of Dolphins (ANI) presents encounter rates in terms of
individuals per 100km. And the encounter rate is not corrected for individuals,
calculation may represent double counting.
^The table is made only for reference to the
quarterly STG & ANI, which were adopted for the Event & Action Plan.
5.7.3 A total of twenty one dolphin sightings
were recorded during the two surveys, eleven on 8 July 2013, six on 23 July
2013 and four on 31 July 2013. Of
the twenty one sightings, fourteen were ¡§on effort¡¨ (which are all under favourable
condition) and seven were ¡§opportunistic¡¨.
A total of sixty one individuals were sighted from the two impact
dolphin surveys in the reporting period. Sighting details are summarised and
plotted in Appendix K and Figure 5c, respectively.
5.7.4 Behaviour: Of the twenty
one sightings made, three were
classified as travelling; two sightings were recorded as ¡¥multiple¡¦ behavior
(both a combination of feeding and surface active); 11 sightings was recorded
as feeding, two as surface active, three as travelling and; three as ¡§unknown¡¨ in Figure 5d.
5.7.5 One mother and calf pair was observed. Although close approaches were not made
to these dolphins, it is possible to discern from the images taken that the
mother was HZMB 098 who was first sighted in May 2013 at which time she had a
calf. Location and image data of
the sighting is provided).
5.7.6 Photo ID analyses is completed (as of
13/08/13). Of the twenty one
sightings recorded, sixteen dolphins were individually identifiable, ten of
which were re-sightings (HZMB 011;
016; 022; 023; 040; 054; 069; 076;
077; 098) and six
of which were new
to the catalogue (HZMB
100-105). Twenty eight individuals
were photographed clearly that could not be added to the catalogue as they lacked unique and
identifiable features. A summary table and images are presented in
Appendix K.
5.7.7 Noteworthy Observation:
-
Marine construction activities which are not part
of the HKBCF Contract continue in NWL, in particular, in the vicinity
of transect line 1 and 2.
Previously reported dredging activities continued at the Brothers
Islands, in the vicinity of transect lines 11 and 12.
-
In NWL, strong currents occurred throughout July
2013, in particular following a period of thunder storms and heavy rain which
occurred on and around 24-25 July 2013.
5.7.8 The event action plan is annexed in Appendix
L.
6
ENVIRONMENTAL SITE INSPECTION AND AUDIT
6.1.1 Site Inspections were carried
out on a weekly basis to monitor the implementation of proper environmental
pollution control and mitigation measures for the Project. In the reporting
month, 4 site inspections were carried out on 4, 11, 17 and 25 July 2013.
6.1.2 Particular observations during
the site inspections are described below:
Air Quality
6.1.3 No adverse observation was
identified in the reporting month.
Noise
6.1.4 No adverse observation was
identified in the reporting month.
Water Quality
6.1.5 Defects were observed around
portion C2a (northwest part of the perimeter silt curtain). The Contractor
rectified the defects of the silt curtain at portion C2a so that potential silt
plume could be effectively prevented from dispersing to the outside of the
perimeter silt curtain (Closed)
6.1.6 Open holes was observed within
the frame of bunding on barge Evershine No.1 and barge SHB401. The Contractor
was advised to rectify the situation by sealing the open hole properly to
prevent potential waste oil leakage. The Contractor rectified the situation by
sealing the open hole properly to prevent potential waste oil leakage. (Closed)
6.1.7 It was observed that the frame
of bunding on barge SHB 401 was deformed. The Contractor was reminded to fix
the deformed part of frame so that the bunding may have appropriate height to
confine potential oil leakage. (reminder)
6.1.8 Oil stain was found on barge
Evershine No.1. The Contractor was reminded to provide mitigation measures such
adsorbents to clean the oil stain. The Contractor immediately provided
mitigation measures such as adsorbents to clean the oil stain and treated the
used absorbents as chemical waste. (Closed)
6.1.9 Oil stain was discovered over
the sea on 25 July 2013 at 11:20 near the cell K038 at Portion B. The
Contractor was advised to follow the actions stated on the Spill Response Plan
and clear the oil waste on sea. The Contractor rectified the situation and
clear the oil waste on sea using absorption boom according to the Spill
Response Plan. The used absorption boom was disposed of as chemical waste.
(Closed)
6.1.10 One of the generators was
observed without bunding/drip tray on barge 401. The Contractor was advised to
provide mitigation measures such as bunding/drip tray to confine potential oil
leakage or to relocate the generator to an area with bunding. (Follow up)
Chemical and Waste Management
Waste
6.1.11 Oil drums were found improperly
stored on barge FTB 17. The Contractor was reminded to provide mitigation
measures such as drip tray or bunding to all oil drums The Contractor
immediately provided mitigation measures and relocate the oil drum inside
bunding. (Closed)
6.1.12 Oil drums were found without
chemical label on barge SHB 209 and Evershine No.1. The Contractor immediately
provided chemical labels to oil drums. (Closed)
6.1.13 Oil drums were improperly
covered on barge FTB 17. The Contractor was reminded to provide mitigation
measures such as lid to oil drums to prevent potential spillage The Contractor
immediately provided mitigation measures such a relocate the waste oil to
another oil drum with lid to prevent potential spillage. (Closed)
6.1.14 General waste was observed
improperly covered. The Contractor immediately provided mitigation measures
such as to remove the general waste via a waste collector. The Contractor was
reminded to provide mitigation measures such bin bag(s) or container to
properly cover all general waste. (Reminder)
Landscape and Visual Impact
6.1.15 No relevant works was carried
out in the reporting month.
Others
6.1.16 No other
adverse observation
was identified in the reporting month.
6.1.17 The Contractor had rectified
most of the observations as identified during environmental site inspection in
the reporting month. Rectifications of remaining identified items are
undergoing by the Contractor. Follow-up inspections on the status on provision
of mitigation measures will be conducted to ensure all identified items are
mitigated properly.
6.2
Advice on the Solid
and Liquid Waste Management Status
6.2.1 The Contractor had registered as
a chemical waste producer for this Project. Receptacles were available for
general refuse collection and sorting.
6.2.2 As advised by the Contractor, 397,704 m3 of fill were
imported for the Project use in the reporting period. 5.501
tonnes of plastic, 4 tonnes of chemical waste and 26m3 of general refuse were generated
and disposed of in the reporting period. Monthly summary of waste flow table is
detailed in Appendix M.
6.2.3 The Contractor is advised to properly maintain on
site C&D materials and wastes storage, collection, sorting and recording
system, dispose of C&D materials and wastes at designated ground and
maximize reuse / recycle of C&D materials and wastes. The Contractor is
reminded to properly maintain the site tidiness and dispose of the wastes
accumulated on site regularly and properly.
6.2.4 The Contractor is reminded that
chemical waste should be properly treated and stored temporarily in designated
chemical waste storage area on site in accordance with the Code of Practice on
the Packaging, Labeling and Storage of Chemical Wastes.
6.3
Environmental
Licenses and Permits
6.3.1 The environmental licenses and
permits for the Project and valid in the reporting month is summarized in Table
6.1.
Table 6.1 Summary of Environmental Licensing and Permit Status
Statutory Reference |
License/ Permit |
License or Permit No. |
Valid Period |
License/ Permit Holder |
Remarks |
|
From |
To |
|||||
EIAO |
Environmental
Permit |
EP-353/2009/F |
24/04/2012 |
N/A |
HyD |
Hong Kong ¡V Zhuhai
¡V Macao Bridge Hong Kong Boundary Crossing Facilities |
EP-354/2009/A |
08/12/2010 |
N/A |
Tuen Mun ¡V Chek
Lap Kok Link (TMCLKL Southern Landfall
Reclamation only) |
|||
APCO |
NA notification |
-- |
30/12/2011 |
-- |
CHEC |
Works Area WA2 and
WA3 |
APCO |
NA notification |
-- |
17/01/2012 |
-- |
CHEC |
Works Area WA4 |
WDO |
Chemical Waste
Producer Registration |
5213-951-C1186-21 |
30/3/2012 |
N/A |
CHEC |
Chemical waste
produced in Contract HY/2010/02 |
WDO |
Chemical Waste
Producer Registration |
5213-974-C3750-01 |
31/10/2012 |
-- |
CHEC |
Registration as
Chemical Waste Producer at To Kau Wan(WA4) |
WDO |
Chemical Waste
Producer Registration |
5213-839-C3750-02 |
13/09/2012 |
-- |
CHEC |
Registration as
Chemical Waste Producer at TKO 137(FB) |
WDO |
Billing
Account for Disposal of Construction Waste |
7014181 |
05/12/2011 |
N/A |
CHEC |
Waste disposal in
Contract HY/2010/02 |
NCO |
Construction Noise
Permit |
GW-RS0122-13 |
08/02/2013 |
04/08/2013 |
CHEC |
Marine-based areas
in Contract HY/2010/02 |
NCO |
Construction Noise
Permit |
GW-RE0634-13 |
24/06/2013 |
31/12/2013 |
CHEC |
Works Area WA4 in Contract HY/2010/02 |
NCO |
Construction Noise
Permit |
GW-RW0424-13 |
28/06/2013 |
27/12/2013 |
CHEC |
Section of TKO Fill Bank under Contract HY/2010/02 |
6.4
Implementation Status
of Environmental Mitigation Measures
6.4.1 In response to the site audit
findings, the Contractors carried out corrective actions.
6.4.2 A summary of the Implementation
Schedule of Environmental Mitigation Measures (EMIS) is presented in Appendix
C. Most of the necessary mitigation measures were implemented properly.
6.4.3 Training of marine travel route
for marine vessels operator was given to relevant staff and relevant records
were kept properly.
6.4.4 Regarding the implementation of
dolphin monitoring and protection measures (i.e. implementation of Dolphin
Watching Plan, Dolphin Exclusion Zone and Silt Curtain integrity Check),
regular checking were conducted by the experienced MMOs within the works area
to ensure no dolphin was trapped by the enclosed silt curtain systems. Any
dolphin spotted within the enclosed silt curtain systems was reported and
recorded. Relevant procedures were followed and measures were well implemented.
Silt curtain systems were also inspected timely in accordance to the submitted
plan. All inspection records were kept properly.
6.4.5 Acoustic decoupling measures on
noisy plants on construction vessels were checked regularly and these measures
were well implemented.
6.5
Summary of
Exceedances of the Environmental Quality Performance Limit
6.5.1 All
1-Hour TSP and 24-hour
TSP results were below the Action and Limit Level in the reporting month.
6.5.2 For construction noise, no
exceedance was
recorded at all monitoring stations in the reporting period.
6.5.3 Three (3) Action Level
exceedances were recorded at measured suspended solids (SS) values (in mg/L) in
the reporting month. Investigation results show that the exceedances were not
due to the Project works.
6.5.4 Cumulative statistics on
exceedance is provided in Appendix N.
6.6
Summary of
Complaints, Notification of Summons and Successful Prosecutions
6.6.1 The Environmental Complaint
Handling Procedure is annexed in Figure 6.
6.6.2 No complaints, summons and
prosecution was received in the reporting period.
6.6.3 Statistics on complaints,
notifications of summons and successful prosecutions are summarized in Appendix
N.
7.1
Construction Programme
for the Coming Months
7.1.1 As informed by the Contractor,
the major works for the Project in August and September 2013 will be:-
Marine-based Works
-
Marine-base
-
Cellular structure installation
-
Connecting arc cell installation
-
Laying geo-textile
-
Sand blanket laying
-
Sand filling
-
Maintenance of silt curtain & silt screen at sea water intake
of HKIA
-
Stone column installation
-
Laying stone blanket
-
Band drain installation
-
Backfill cellular structure
-
Instrumentation works
-
Rubble mound seawall construction
-
Construction of temporary seawall
-
Ground investigation
Land-based Works
-
Maintenance works of Site Office at Works Area WA2
-
Maintenance works of Public Works Regional Laboratory at
Works Area WA3
-
Geo-textile fabrication at Works Area WA2
-
Silt curtain fabrication at Works Area WA4
-
Maintenance of Temporary Marine Access at Works Area WA2
7.2
Key Issues for the
Coming Month
7.2.1 Key issues to be considered in
the coming months:-
-
Site runoff should be properly collected and treated prior
to discharge;
-
Minimize loss of sediment from filling works;
-
Regular review and maintenance of silt curtain systems,
drainage systems and desilting facilities;
-
Exposed surfaces/soil stockpiles should be properly treated
to avoid generation of silty surface run-off during rainstorm;
-
Regular review and maintenance of wheel washing facilities
provided at all site entrances/exits;
-
Conduct regular inspection of various working machineries
and vessels within works areas to avoid any dark smoke emission;
-
Suppress dust generated from work processes with use of
bagged cements, earth movements, excavation activities, exposed surfaces/soil
stockpiles and haul road traffic;
-
Quieter powered mechanical equipment should be used;
-
Provision of proper and effective noise control measures for
operating equipment and machinery on-site, such as erection of movable noise
barriers or enclosure for noisy plants;
- Closely check
and replace the sound insulation materials regularly;
- Better
scheduling of construction works to minimize noise nuisance;
-
Properly store and label oil drums and chemical containers
placed on site;
-
Proper chemicals, chemical wastes and wastes management;
-
Maintenance works should be carried out within roofed, paved
and confined areas;
-
Collection and segregation of construction waste and general
refuse on land and in the sea should be carried out properly and regularly; and
- Proper
protection and regular inspection of existing trees, transplanted/retained
trees.
7.3
Monitoring
Schedule for the Coming Month
7.3.1
The tentative schedule
for environmental monitoring in August 2013 is provided in Appendix F.
8
ConclusionS AND RECOMMENDATIONS
8.1.1 The construction phase and
EM&A programme of the Project commenced on 12 March 2012.
8.1.2
All 1-Hour TSP and 24-hour TSP results were below the Action and Limit
Level in the reporting month.
8.1.3 For construction noise, no
exceedance was recorded at all monitoring stations in the reporting period.
8.1.4 Three (3) Action Level
exceedances were recorded at measured suspended solids (SS) values (in mg/L) in
the reporting month. Investigation results show that the exceedances were not
due to the Project works.
8.1.5 A total of twenty one dolphin sightings were recorded during the two surveys, eleven on 8 July 2013, six on 23 July 2013 and four
on 31 July 2013. Of the twenty one sightings, fourteen were ¡§on effort¡¨ (which are all under favourable condition) and seven were ¡§opportunistic¡¨. A total of
sixty
one individuals were sighted
from the two impact dolphin surveys in the reporting period. Sighting details
are summarised and plotted in Appendix K and Figure 5c, respectively.
8.1.6 Behaviour: Of the 21 sightings made, three were classified as travelling;
two sightings were recorded as ¡¥multiple¡¦ behavior (both a combination of
feeding and surface active); 11 sightings was recorded as feeding, two as
surface active, three as travelling and; three as ¡§unknown¡¨ in
Figure 5d.
8.1.7 Environmental site inspection
was carried out 4 times in July 2013. Recommendations on
remedial actions were given to the Contractors for the deficiencies identified
during the site audits.
8.1.8
No complaints, summons
and prosecution was received in the reporting period.
8.2
Recommendations
8.2.1 According to the environmental
site inspections performed in the reporting month, the following
recommendations were provided:
Air Quality Impact
l All
working plants and vessels on site should be regularly inspected and properly
maintained to avoid dark smoke emission.
l All vehicles should be washed to
remove any dusty materials before leaving the site.
l Haul roads should be
sufficiently dampened to minimize fugitive dust generation.
l Wheel washing facilities should
be properly maintained and reviewed to ensure properly functioning.
l Temporary exposed slopes and
open stockpiles should be properly covered.
l Enclosure should be erected for
cement debagging, batching and mixing operations.
l Water spraying should be provided
to suppress fugitive dust for any dusty construction activity.
Construction Noise Impact
l Quieter
powered mechanical equipment should be used as far as possible.
l Noisy
operations should be oriented to a direction away from sensitive receivers as
far as possible.
l Proper
and effective noise control measures for operating equipment and machinery
on-site should be provided, such as erection of movable noise barriers or
enclosure for noisy plants. Closely check and replace the sound insulation
materials regularly
l Vessels
and equipment operating should be checked regularly and properly maintained.
l Noise
Emission Label (NEL) shall be affixed to the air compressor and hand-held
breaker operating within works area.
l Better
scheduling of construction works to minimize noise nuisance.
Water Quality Impact
l Regular
review and maintenance of silt curtain systems, drainage systems and desilting
facilities in order to make sure they are functioning effectively.
l Construction
of seawall should be completed as early as possible.
l Regular
inspect and review the loading process from barges to avoid splashing of
material.
l Silt,
debris and leaves accumulated at public drains, wheel washing bays and
perimeter u-channels and desilting facilities should be cleaned up regularly.
l Silty
effluent should be treated/ desilted before discharged. Untreated effluent
should be prevented from entering public drain channel.
l Proper
drainage channels/bunds should be provided at the site boundaries to
collect/intercept the surface run-off from works areas.
l Exposed
slopes and stockpiles should be covered up properly during rainstorm.
Chemical and Waste Management
l All
types of wastes, both on land and floating in the sea, should be collected and
sorted properly and disposed of timely and properly. They should be properly
stored in designated areas within works areas temporarily.
l All
chemical containers, batteries and oil drums should be properly stored and
labelled.
l All
plants and vehicles on site should be properly maintained to prevent oil
leakage. Proper measures,
like drip trays and/or bundings, should be provided for retaining leaked
oil/chemical from plants.
l All
kinds of maintenance works should be carried out within roofed, paved and
confined areas.
l All
drain holes of the drip trays utilized within works areas should be properly
plugged to avoid any oil and chemical waste leakage.
l Oil
stains on soil surface, accumulated oil mixture and empty chemical containers
should be cleared and disposed of as chemical waste.
l Regular review should be conducted for working
barges and patrol boats to ensure sufficient measures and spill control kits
were provided on working barges and patrol boats to avoid any spreading of
leaked oil/chemicals.
Landscape and Visual Impact
l All
existing, retained/transplanted trees at the works areas should be properly
fenced off and regularly inspected.