TABLE OF CONTENTS
1.4 Summary of Construction Works
2 Summary
of EM&A Programme Requirements
2.2 Environmental Quality Performance (Action/Limit
Levels)
2.3 Environmental Mitigation Measures
3.5 Environmental Site Inspection and Audit
4 Advice on the Solid and
Liquid Waste Management Status
4.1 Summary of Solid and Liquid Waste Management
5 Implementation Status of Environmental Mitigation
Measures
5.1 Implementation Status of Environmental Mitigation
Measures
6 Summary of Exceedances of the Environmental Quality
Performance Limit
6.1 Summary of Exceedances of the Environmental Quality
Performance Limit
7 Summary of Complaints, Notification of Summons and
Successful Prosecutions
7.1 Summary of Environmental Compliants, Notification of
Summons and Successful Prosecutions
8 Comments, recommendations and Conclusions
8.1 Comments on mitigation measures
8.2 Recommendations on EM&A Programme
List of Tables
Table 1.1 Contact Information of Key Personnel
Table 3.1 Summary of Number of Monitoring Events for
1-hr & 24-hr TSP Concentration
Table 3.2 Summary of
Number of Exceedances for 1-hr & 24-hr TSP Monitoring
Table 3.3 Summary of Number of Monitoring Events for Impact Noise
Table 3.4 Summary of Number of Monitoring Exceedances
for Impact
Noise
Table 3.5 Summary of Water Quality Exceedances in Jun 13-Aug 13
Table 3.6 Summary of Key Dolphin Survey Findings in Jun 2013- Aug 2013
Table 3.7 Summary of STG and ANI encounter rates in Jun 2013- Aug 2013
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 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 Graphical
Presentation of Impact
Air Quality Monitoring Results
Appendix
F Graphical
Presentation of Impact
Daytime Construction Noise Monitoring Results
Appendix
G Graphical
Presentation of Impact
Water Quality Monitoring Results
Appendix
H Impact Dolphin Monitoring
Survey Findings and Analysis
Appendix
I Quarterly Summary of Waste Flow
Table
This report documents the findings of EM&A works
conducted in the period between 1 June 2013 and 31 August 2013. As informed by
the Contractor, major activities in the reporting quarter 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 quarter is listed below:
24-hour Total Suspended Particulates (TSP) monitoring 1-hour
TSP monitoring |
15 sessions 15 sessions |
Noise monitoring |
12 sessions |
Impact water quality monitoring |
39 sessions |
Impact dolphin monitoring |
6 surveys |
Joint Environmental site inspection |
13 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 quarter.
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
Fourteen (14) Action Level exceedances and two (2) limit level exceedance were recorded in the reporting quarter. Six (6) Action Level Exceedances
of DO (Bottom), one (1) Limit Level Exceedance
of DO (Surface & Middle) and one
(1) Limit Level Exceedances of SS were recorded in
June 13. Three (3) Action Level Exceedances of SS were recorded in the July 13. Five (5) Action Level
Exceedances of SS were recorded in
August 13. Investigation
results show that the exceedances were not due to the
Project works.
Breaches
of Action and Limit Levels for Impact Dolphin Monitoring
Two (2) Action level exceedances of Chinese White Dolphin monitoring were
recorded in the reporting. After investigation, it was noted although no
unacceptable changes in environmental parameters of this project have been
measured, at this time it is not possible to make a conclusive assessment of
the Project impact on dolphins. Investigation details are annexed in Appendix
L.
Implementation
Status and Review of Environmental Mitigation Measures
Most of the recommended
mitigation measures, as included in the EM&A programme,
were implemented properly in the reporting quarter.
The recommended
environmental mitigation measures effectively minimize the potential
environmental impacts from the Project. The EM&A programme effectively
monitored the environmental impacts from the construction activities and ensure
the proper implementation of mitigation measures. No particular recommendation
was advised for the improvement of the programme.
Moreover, regular review
and checking on the construction methodologies, working processes and plants
were carried out to ensure the environmental impacts were kept minimal and
recommended environmental mitigation measures were implemented effectively.
Complaint,
Notification of Summons and Successful Prosecution
No complaint, notification
of summons and successful prosecution was received were received
in the reporting quarter.
Table
1.1 Contact
Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
Engineerˇ¦s Representative (ER) (Ove Arup & Partners Hong Kong Limited) |
Chief Resident Engineer |
Roger Marechal |
2528 3031 |
2668 3970 |
IEC / ENPO (ENVIRON Hong Kong Limited) |
Independent Environmental Checker |
Raymond Dai |
3465 2888 |
3548 6988 |
Environmental Project Office Leader |
Y.H. Hui |
3465 2868 |
3465 2899 |
|
Contractor (China Harbour
Engineering Company Limited) |
General Manager (S&E) |
Daniel Leung |
3157 1086 |
2578 0413 |
Environmental Officer |
Richard Ng |
36932253 |
2578 0413 |
|
24-hour Hotline |
Alan C.C. Yeung |
9448 0325 |
-- |
|
ET (AECOM
Asia Company Limited) |
ET Leader |
Echo Leong |
3922 9280 |
2317 7609 |
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
Table 3.1 Summary of Number of Monitoring Events for 1-hr & 24-hr
TSP Concentration
Monitoring Parameter |
Location |
No. of monitoring events |
||
June 13 |
July 13 |
August13 |
||
1-hr TSP |
AMS2 |
15 |
15 |
15 |
AMS3A |
15 |
15 |
15 |
|
AMS7 |
15 |
15 |
15 |
|
24-hr TSP |
AMS2 |
5 |
5 |
5 |
AMS3A |
5 |
5 |
5 |
|
AMS7 |
5 |
5 |
5 |
Table 3.2 Summary of Number of Exceedances for 1-hr & 24-hr TSP Monitoring
Monitoring Parameter |
Location |
Level of Exceedance |
Level of Exceedance |
||
June 13 |
July 13 |
August 13 |
|||
1-hr TSP |
AMS2 |
Action |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
||
AMS3A |
Action |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
||
AMS7 |
Action |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
||
|
Total |
0 |
0 |
0 |
|
24-hr TSP |
AMS2 |
Action |
0 |
0 |
0 |
Limit |
0 |
0 |
0 |
||
AMS3A |
Action |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
||
AMS7 |
Action |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
||
|
Total |
0 |
0 |
0 |
Table 3.3 Summary
of Number of Monitoring Events for Impact Noise
Monitoring
Parameter |
Location |
No.
of monitoring events |
||
June 13 |
July 13 |
August 13 |
||
NMS2 |
4 |
4 |
4 |
|
NMS3A |
4 |
4 |
4 |
Table
3.4 Summary
of Number of Monitoring Exceedances for Impact Noise
Monitoring Parameter |
Location |
Level of Exceedance |
Level of Exceedance |
||
June 13 |
July 13 |
August 13 |
|||
NMS2 |
Action |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
||
NMS3A |
Action |
0 |
0 |
0 |
|
Limit |
0 |
0 |
0 |
||
|
Total |
0 |
0 |
0 |
Exceedance Level |
DO (S&M) |
DO (Bottom) |
Turbidity |
SS |
Total |
||||||
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
||
Action |
0 |
0 |
0 |
1 (10 June
13) |
0 |
0 |
0 |
1 (7 Aug 2013) |
0 |
2 |
|
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)6 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 (7 Aug 2013) |
0 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS7 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 (7 Aug 2013) |
0 |
1 |
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 |
1 (10 June
13) |
1 (10 June
13) |
0 |
0 |
0 |
1 (26 July
13) |
1 |
2 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)11 |
Action |
0 |
0 |
1 (10 June
13) |
1 (10 June
13) |
0 |
0 |
0 |
0 |
1 |
1 |
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
IS(Mf)16 |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
1 (23 Aug 2013) |
0 |
1 |
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 |
1 (7 Aug 2013) |
0 |
1 |
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 |
1 (24 June
13) |
0 |
1 |
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 |
1 (10 June
13) |
0 |
0 |
0 |
0 |
0 |
1 |
Limit |
0 |
1 (10 June
13) |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
|
Total |
Action |
0 |
0 |
2 |
4 |
0 |
0 |
1 |
7 |
14 |
|
|
Limit |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0 |
2 |
Note: S: Surface;
M: Mid-depth;
3.3.3.1 For type, location and duration of works carried
out on 10 June 2013 please refer to the above layout map.
3.3.3.2 Exceedances were not due to marine based construction works of
the Project because:
3.3.3.3 During ebb tide, monitoring station IS(Mf)11 and IS10 are considered upstream to active works
which the water quality are unlikely to be affected by active works. In
addition, no exceedance was recorded at IS(Mf)16 and
IS17 which are considered downstream to active works suggesting active works
were unlikely to be the source of impact.
3.3.3.4
During ebb
tide, low DO (Bottom) - 4.8mg/L was noted at control station CS(Mf)3 which is
considered upstream to monitoring station IS(Mf)11 and IS10, indicating DO
(Bottom) at location upstream to active construction works was adversed affected by local effects in the vicinity. As
such, the exceedances recorded were likely due to
local effects in the vicinity at IS(Mf)11 and IS10 .
3.3.3.5
Low DO (Bottom)
- 4.4mg/L, 4.2mg/L, 4.0mg/L and 4.0mg/L were noted at monitoring station SR10B(N), CS6, CSA and CS(Mf)5 respectively which are
considered upstream to monitoring stations IS(Mf)11 and IS10 during mid flood
tide indicating DO (Bottom) at locations upstream to active construction works
were adversed affected by local effects in the
vicinity. As such, the exceedances recorded were
likely due to local effects in the vicinity at IS(Mf)11,
IS10 and IS5 during mid flood tide.
3.3.3.6
No DO (Bottom) exceedance was recorded during flood tide at monitoring
locations IS7, IS(Mf)6 and IS(Mf)9 which are closer to active works than
monitoring location IS5, indicating exceedance of DO
(Bottom) recorded at monitoring location IS5 during flood tide was unlikely to
be contributed by active works.
3.3.3.7 The exceedances were
considered as Non-Project Related.
3.3.3.8 Nevertheless, the Contractor was reminded to ensure
provision of ongoing maintenance to the silt curtains.
3.3.3.9 Maintenance work of the silt curtain was carried
out by the Contractor on a daily basis except Sunday and public holiday.
3.3.4.1 For
type, location and duration of works carried out on 10 June 2013 please refer
to the above layout map.
3.3.4.2 Exceedance was not
due to marine based construction works of the Project because:
3.3.4.3
Red rain storm signal was hoisted between
10:20am - 11:35am by Hong Kong Observatory during flood tide and adverse weather
condition e.g. heavy rainfall in the monitoring area was noted before the limit
level exceedance recorded at SR4(N) at 12:53pm on 24
June 2013. As such, the water quality at SR4(N) was
likely to be affected.
3.3.4.4
The monitoring sites SR4 far away from
where active works were carried out during ebb tide. Suspended solids values
recorded at Impact Stations closer to the works are (e.g. IS(Mf)9,
IS7 and IS8) all below the Action and Limit Level during the same tide on the
same day.
3.3.4.5
For limit level exceedance
of depth averaged SS (in mg/L) recorded at SR4(N)
during mid ebb tide, same works were carried out at almost the same locations
on 21, 24 and 26 June 13, but all
depth averaged SS (in mg/L) results recorded at all monitoring location on 21
and 26 June 13 were all below the Action and Limit Level. Which indicates
project works is unlikely to contribute to the limit level exceedance
recorded at SR4(N).
3.3.4.6 The
exceedance was likely due to local effects in the
vicinity SR4(N).
3.3.4.7 The
exceedance was considered as Non-Project Related.
3.3.4.8
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.
3.3.4.9
Maintenance work of the silt curtain was
carried out by the Contractor on a daily basis except Sunday and public
holiday.
3.3.5.1 For works activities carried out on 26 July 2013,
please refer to above layout map which shows the locations active works.
3.3.5.2 Exceedances were not
due to marine based construction works of the Project because:
3.3.5.3
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.
3.3.5.4
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.
3.3.5.5
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.
3.3.5.6
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.
3.3.5.7 The exceedances were
likely due to local effects in the vicinity of IS10 and SR5.
3.3.5.8 The exceedances were
considered as non-Project related.
3.3.5.9 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.
3.3.5.10 Maintenance work of the silt curtain was carried
out by the Contractor on a daily basis except Sunday and public holiday.
3.3.6.1
Exceedance was not due to
marine based construction works of the Project because:
3.3.6.2
For works
activities carried out on 31 July 2013, please refer to above layout map which
shows the locations active works.
3.3.6.3
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.
3.3.6.4
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.
3.3.6.5
The exceedance was likely due to local effects in the vicinity
of SR5.
3.3.6.6
The exceedance was considered as non-Project related.
3.3.6.7
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.
3.3.6.8
Maintenance
work of the silt curtain was carried out by the Contractor on a daily basis
except Sunday and public holiday.
3.3.7.1
For locations
and type of active works carried out on 7 Aug 13, please refer to the above
layout map.
3.3.7.2
Exceedances were not due
to marine based construction works of the Project because:
3.3.7.3
Same type of
works were carried out at the same locations on 5 and 9 Aug 13 but Suspended
Solids values recorded at IS(Mf)6, IS5, IS7 and SR3
on 5 and 9 Aug 13 are below the
Action and Limit Level during the same tide which indicates project works is
unlikely to contribute to the action level exceedances
recorded at IS(Mf)6, IS5, IS7 and
SR3.
3.3.7.4
Monitoring
Stations IS10 and IS(Mf)11 which are considered
downstream to the active works of
during mid flood tide. 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 downstream of active works during
flood tide were not adversely affected by active works. Hence it is considered
that the action level exceedances recorded at IS(Mf)6, IS5, IS7 and SR3 are unlikely contributed by
project works.
3.3.7.5
Amongst the 4 exceedance stations, relatively higher SS value were
recorded at IS5 and SR3 which are further away from HKBCF's active works than
it is for IS(Mf)6 and IS7, indicating that the localized non-project source is
likely to be located at upstream to the BCF site during flood tide.
3.3.7.6
Turbidity
measurements results at IS(Mf)6, IS5, IS7 and SR3
during flood tide are all below the Action and Limit Level. It is considered
that the turbidity recorded at IS(Mf)6, IS5, IS7 and
SR3 were not adversely affected by active works.
3.3.7.7
The exceedances were likely due to local effects in the
vicinity of IS(Mf)6, IS5, IS7 and SR3.
3.3.7.8
The exceedances were considered as non-Project related.
3.3.7.9
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.
3.3.7.10 Maintenance work of the silt curtain was carried
out by the Contractor on a daily basis except Sunday and public holiday.
3.3.8.1
For locations
and type of active works carried out on 23 Aug 13, please refer to the above layout
map.
3.3.8.2
Exceedance was not due to
marine based construction works of the Project because:
3.3.8.3
Same type of
works were carried out at the same locations on 21 and 26 Aug 13 but Suspended
Solids values recorded at IS(Mf)16 on 21 and 26 Aug 13
are below the Action and Limit Level during the same tide which indicates
project works is unlikely to contribute to the action level exceedances
recorded at IS(Mf)16.
3.3.8.4
Turbidity
measurements results at IS(Mf)16 during Ebb tide is
13.5 NTU which is well below the Action and Limit Level. It is considered that
the turbidity recorded at IS(Mf)16 were not adversely
affected by active works.
3.3.8.5
No silt plume
was observed flowing from the inside of the perimeter silt curtain to the
outside of the perimeter silt curtain when water quality monitoring was
conducted at IS(Mf)16.
3.3.8.6
In view of
there is no damage can be observed from the perimeter silt curtain which
deployed in the works area at Portion D and E2.
3.3.8.7
The exceedance was likely due to local effects in the vicinity
of IS(Mf)16 and considered non-project related.
3.3.8.8
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.
3.3.8.9
Maintenance
work of the silt curtain was carried out by the Contractor on a daily basis
except Sunday and public holiday.
3.3.8.10 The graphical plots of the trends of the monitoring
results are provided in Appendix G. No specific trend of the monitoring results
or existence of persistent pollution source was noted.
Table 3.6 Summary
of Key Dolphin Survey Findings in Jun 2013- Aug 2013
Number of Impact Surveys Completed^ |
6 |
Survey Distance Travelled under Favourable On- Effort Condition |
663.8km |
Number of Sightings |
45 sightings (29 sightings are ˇ¨on
effortˇ¨ (which are all under favourable condition),
16 ˇ§sightings are opportunisticˇ¨) |
Number of dolphin individual sighted |
125 individuals (the best estimated
group size) |
Dolphin Encounter Rate# |
NEL: 1.8 NWL:5.7 |
Dolphin Group Size |
Average of 2.8 Varied from 1-12 individuals |
Most Often frequent dolphin sighting
area |
Sha
Chau and Lung Kwu Chau Marine Park, Tai O, and
areas to the east of the Brothers Islands. |
# Dolphin Encounter Rate = (Sum of 1st 2nd, 3rd monthˇ¦s
total sighting/ Sum of 1st 2nd, 3rd monthˇ¦s
total effort)*100km (encounter rates
are calculated using on effort sightings made under favourable
conditions only.)
Table 3.7 Summary
of STG and ANI encounter rates in Jun 2013- Aug 2013 |
||||
NEL |
NWL |
Level Exceeded |
|
|
STG* |
1.8 |
1.8 |
Action |
|
ANI** |
5.7 |
16.6 |
Action |
|
*Quarterly
Average Encounter Rate of Number of Dolphin Sightings (STG) presents averaged
encounter rates of the three monitored months in terms of groups per 100km per
survey event.
STG
Encounter rate = (Average of (total number sighting/total effort) of 1st and
2nd completed survey# of 1st month+ Average of (total number sighting/total
effort) of 1st and 2nd completed survey# of 2nd month + Average of (total
number sighting/total effort) of 1st and 2nd completed survey# of 3rd month)/3*100km
**Quarterly
Average Encounter Rate of Total Number of Dolphins (ANI) presents averaged
encounter rates of the three monitored months in terms of individuals per 100km
per survey event.
ANI
Encounter rate = (Average of (total number of Individual/total effort) of 1st
and 2nd completed survey# of 1st month+ Average of (total number of
Individual/total effort) of 1st and 2nd completed survey# of 2nd month +
Average of (total number of Individual/total effort) of 1st and 2nd completed
survey# of 3rd month +)/3*100km
Air Quality
Water Quality
Chinese White
Dolphin
Chemical and Waste Management
Waste
Landscape and Visual Impact
Others
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.
l Acoustic decoupling measures should
be properly implemented for all existing and incoming construction vessels with
continuous and regularly checking to ensure effective implementation of acoustic
decoupling measures.
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 and oil
drums should be properly stored and labelled.
l All plants and vehicles on site
should be properly maintained to prevent oil leakage.
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 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.