table
of Contents
Executive
Summary
1.1 Background
1.2 Scope of Report
1.3 Organization Structure
1.4 Summary of Construction Works
2.1 Air quality
2.2 Water Quality Monitoring
2.3 Dolphin Monitoring
2.4 EM&A Site Inspection
2.5 Waste Management Status
2.6 Environmental Licenses and
Permits
2.7 Implementation Status of
Environmental Mitigation Measures
2.8 Summary of Exceedances of the
Environmental Quality Performance Limit
2.9 Summary of Complaints,
Notification of Summons and Successful Prosecutions
3.1 Construction Activities for
the Coming Quarter
3.2 Key Issues for the Coming
Quarter
3.3 Monitoring Schedule for the
Coming Quarter
Under Contract
No. HY/2012/08, Dragages – Bouygues Joint Venture (DBJV) is commissioned by
the Highways Department (HyD) to undertake the design and construction of the Northern
Connection Sub-sea Tunnel Section of the Tuen Mun – Chek Lap Kok Link Project
(TM-CLK Link Project) while AECOM Asia Company Limited was appointed by HyD as the
Supervising Officer. For implementation
of the environmental monitoring and audit (EM&A) programme under the
Contract, ERM-Hong Kong, Limited (ERM) has been appointed as the Environmental
Team (ET) in accordance with Environmental
Permit No. EP-354/2009/A. Ramboll Hong Kong
Ltd. was employed by HyD as the Independent Environmental Checker (IEC) and
Environmental Project Office (ENPO). Subsequent
applications for variation of environmental permits (VEP), EP-354/2009/B, EP-354/2009/C
and EP-354/2009/D, were granted on 28 January 2014, 10 December 2014 and 13
March 2015, respectively.
The construction phase of the Project commenced on 1
November 2013 and will tentatively be completed by the end of 2018. The impact monitoring of the EM&A
programme, including air quality, water quality, marine ecological monitoring
and environmental site inspections, were commenced on 1 November 2013.
This is the Seventeenth Quarterly EM&A report
presenting the EM&A works carried out during the period from 1 December
2017 to 28 February 2018 for the Contract
No. HY/2012/08 Northern
Connection Sub-sea Tunnel Section (the “Project”) in
accordance with the Updated EM&A Manual of the TM-CLK
Link Project. As informed by the
Contractor, the major activities in the reporting quarter included:
Land-based Works
·
Box Culvert Extension at Works Area – Portion N-A;
·
Construction of North Ventilation Building – Portion
N-C;
·
Construction of Cross Passage Tympanum – TBM tunnel;
·
Cross Passage Lining Installation – TBM Tunnel;
·
Cross Passage Construction by Pipe Jacking – TBM
Tunnel;
·
Excavation of Sub-sea Tunnel – TBM tunnel;
·
Corbel & OVHD Construction – TBM Tunnel;
·
Parapet wall Installation – TBM Tunnel;
·
Bulk Excavation – Portion S-A;
·
CSM treatment, Jet Grouting works and D-wall
Construction; and
·
Ground Freezing Works – Portion S-A
Marine-based Works
·
Seawall Construction and Filling works – Portion N-A;
and
·
Seawall Enhancement works – Portion N-C
A summary of monitoring and audit activities conducted
in the reporting period is listed below:
24-hour TSP Monitoring 29
sessions
1-hour TSP Monitoring 29
sessions
Water Quality Monitoring 13 sessions
Impact Dolphin Monitoring 6 sessions
Joint Environmental Site Inspection 13 sessions
Implementation
of Marine Mammal Exclusion Zone
Daily
marine mammal exclusion zone was in effect during the period of dredging,
reclamation or marine sheet piling works in open waters under this
Contract. No sighting of the
Indo-Pacific humpback dolphin Sousa chinensis (i.e. Chinese White Dolphin) was
recorded in December 2017 during the exclusion zone monitoring.
Summary of Breaches of Action/Limit Levels
Breaches of
Action and Limit Levels for Air Quality
Fifteen (15) Action Level exceedances of 1-hour TSP
were recorded in the air quality monitoring of this reporting period. Two (2) Action Level and three (3) Limit
Level exceedances of 24-hour TSP were recorded.
Investigation report is provided in Appendix J.
Breaches of
Action and Limit Levels for Water Quality
Four (4) Action Level exceedances of Suspended Solids
(SS) were recorded in the water quality monitoring of this reporting
period. Investigation reports are
provided in Appendix J.
Dolphin Monitoring
Whilst
two (2) Action Level exceedances were observed for the quarterly dolphin
monitoring data between December 2017 and February 2018, no unacceptable impact
from the construction activities of the TM-CLKL Northern
Connection Sub-sea Tunnel Section on Chinese White Dolphins was noticeable from general
observations during the dolphin monitoring in this reporting
quarter.
Environmental
Complaints, Non-compliance & Summons
No
non-compliance with EIA recommendations, EP conditions and other requirements
associated with the construction of this Contract was recorded in this
reporting period.
One
(1) environmental complaint case regarding air, noise and light pollution at
Tuen Mun Pier was referred by IEC on 30 January 2018.
No environmental summons was received in this
reporting period.
Reporting Change
There was no reporting change required in the
reporting period.
Upcoming Works for the Next Reporting Period
Works to be undertaken in the coming quarterly period
include the following:
Land-based Works
·
Box Culvert Extension at Works Area – Portion N-A;
·
Construction of North Ventilation Building – Portion
N-C;
·
Construction of Cross Passage Tympanum – TBM tunnel;
·
Cross Passage Lining Installation – TBM Tunnel;
·
Excavation of Sub-sea Tunnel – TBM tunnel;
·
Corbel Construction – TBM Tunnel;
·
Bulk Excavation – Portion S-A;
·
TBM Excavation – Portion S-A;
·
CSM treatment, Jet Grouting works and D-wall
Construction; and
·
Ground Freezing Works – Portion S-A
Marine-based Works
·
Seawall Modification Works – Portion S-A
Future Key Issues
Potential environmental impacts arising from the above
upcoming construction activities in the coming quarterly period are expected to
be mainly associated with dust, marine ecology, marine water quality and waste
management issues.
According to the findings of the Northwest New
Territories (NWNT) Traffic and Infrastructure Review conducted by the Transport
Department, Tuen Mun Road, Ting Kau Bridge, Lantau Link and North Lantau
Highway would be operating beyond capacity after 2016. This forecast has been based on the estimated
increase in cross boundary traffic, developments in the Northwest New
Territories (NWNT), and possible developments in North Lantau, including the
Airport developments, the Lantau Logistics Park (LLP) and the Hong Kong –
Zhuhai – Macao Bridge (HZMB). In order
to cope with the anticipated traffic demand, two new road sections between NWNT
and North Lantau – Tuen Mun – Chek Lap Kok Link (TM-CLKL) and Tuen Mun Western
Bypass (TMWB) are proposed.
An Environmental Impact Assessment (EIA) of TM-CLKL
(the Project) was prepared in accordance with the EIA Study Brief (No.
ESB-175/2007) and the Technical
Memorandum of the Environmental Impact Assessment Process (EIAO-TM). The EIA Report was submitted under the
Environmental Impact Assessment Ordinance (EIAO) in August 2009. Subsequent to the approval of the EIA Report
(EIAO Register Number AEIAR-146/2009), an Environmental Permit (EP-354/2009)
for TM-CLKL was granted by the Director of Environmental Protection (DEP) on 4
November 2009, and EP variation (VEP) (EP-354/2009/A) was issued on 8 December
2010. Subsequent applications for
variation of environmental permits (VEP), EP-354/2009/B,
EP-354/2009/C and EP-354/2009/D,
were granted on 28 January 2014, 10 December 2014 and 13 March 2015,
respectively.
Under Contract
No. HY/2012/08, Dragages – Bouygues Joint Venture (DBJV) is commissioned by
the Highways Department (HyD) to undertake the design and construction of the
Northern Connection Sub-sea Tunnel Section of TM-CLKL while AECOM
Asia Company Limited was appointed by HyD as the Supervising Officer. For implementation of the environmental
monitoring and audit (EM&A) programme under the Contract, ERM-Hong Kong,
Limited (ERM) has been appointed as the Environmental Team (ET) in accordance
with Environmental Permit No. EP-354/2009/A. Ramboll Hong Kong Ltd.
was employed by HyD as the Independent Environmental Checker (IEC) and
Environmental Project Office (ENPO).
Layout of the Contract components is
presented in Figure 1.1.
The organization structure of the Contract is shown in Appendix A. The
key personnel contact names and contact details are summarized in Table 1.1 below.
Table 1.1 Contact Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
Highways
Department |
Engr 22/HZMB |
Chow Man Lung,
Andrew |
2762 4110 |
2762 4110 |
SOR (AECOM Asia
Company Limited) |
Chief Resident
Engineer |
Roger Man Andrew
Westmoreland |
2293 6388 2293 6360 |
2293 6300 2293 6300 |
ENPO / IEC (Ramboll Hong
Kong Ltd.) |
ENPO Leader |
Y.H. Hui |
3465
2850 |
3465 2899 |
IEC |
Dr. F.C. Tsang |
3465
2851 |
3465 2899 |
|
Contractor (Dragages – Bouygues Joint Venture) |
Environmental
Officer |
Bryan Lee |
2293 7323 |
2293 7499 |
|
24-hour
complaint hotline |
Rachel Lam |
2293 7330 |
|
ET (ERM-HK) |
ET Leader |
Jasmine Ng |
2271 3311 |
2723 5660 |
The general layout plan of the site showing the
detailed works areas is shown in Figure 1.2. The
Environmental Sensitive Receivers in the vicinity of the Project are shown in Figure 1.3.
Table 1.2 Summary of Construction Activities Undertaken during the
Reporting Period
Construction Activities Undertaken |
Land-based Works |
·
Box Culvert Extension at Works Area – Portion N-A; ·
Construction of North Ventilation Building – Portion
N-C; ·
Construction of Cross Passage Tympanum – TBM tunnel; ·
Cross Passage Lining Installation – TBM Tunnel; ·
Cross Passage Construction by Pipe Jacking – TBM
Tunnel; ·
Excavation of Sub-sea Tunnel – TBM tunnel; ·
Corbel & OVHD Construction – TBM Tunnel; ·
Parapet wall Installation – TBM Tunnel; ·
Bulk Excavation – Portion S-A; ·
CSM treatment, Jet Grouting works and D-wall
Construction; and ·
Ground Freezing Works – Portion S-A Marine-based
Works ·
Seawall Construction and Filling works – Portion
N-A; and ·
Seawall Enhancement works – Portion N-C |
Figure 1.2 Locations of Construction Activities – December 2017 to
February 2018
|
The EM&A programme required environmental
monitoring for air quality, water quality and marine ecology as well as
environmental site inspections for air quality, noise, water quality, waste
management, marine ecology and landscape and visual impacts. The EM&A requirements and related
findings for each component are summarized in the following sections
As per the requirements under Condition
2.4 of EP-354/2009/D, the
Enhanced TSP Monitoring Plan has been prepared under Contract No. HY/2012/08.
Details of the monitoring plan are presented in the Enhanced TSP Monitoring Plan ([1]).
In accordance with the Updated EM&A Manual and the
Enhanced
TSP Monitoring Plan, impact 1-hour TSP monitoring was conducted three (3)
times in every six (6) days and impact 24-hour TSP monitoring was carried out
once in every six (6) days when the highest dust impact was expected. 1-hr and 24-hr TSP monitoring frequency was
increased to three times per day every three days and daily every three days
respectively as excavation works for launching shaft commenced on 24 October
2014.
High volume samplers (HVSs) were used to carry out the
1-hour and 24-hour TSP monitoring in the reporting quarter at the five (5) air
quality monitoring stations in accordance with the requirements stipulated in
the Updated EM&A Manual (Figure 2.1; Table 2.1). Wind anemometer was installed at the rooftop
of ASR5 for logging wind speed and wind direction. Details of the equipment deployed are
provided in Table 2.2.
Table 2.1 Locations
of Impact Air Quality Monitoring Stations and Monitoring Dates in this
Reporting Period
Monitoring
Station |
Monitoring
Dates |
Location |
Description |
Parameters & Frequency |
ASR1 |
2, 5, 8, 11, 14, 17, 20, 23, 26 and 29 December 2017 |
Tuen Mun Fireboat Station |
Office |
TSP monitoring 1-hour Total Suspended Particulates (1-hour TSP, µg/m3), 3
times in every 6 days 24-hour Total Suspended Particulates (24-hour TSP, µg/m3),
daily for 24-hour in every 6 days Enhanced TSP monitoring
(commenced on 24 October 2014) 1-hour Total Suspended Particulates (1-hour TSP, µg/m3), 3
times in every 3 days 24-hour Total Suspended Particulates (24-hour TSP, µg/m3),
daily for 24-hour in every 3 days |
ASR5 |
1, 4, 7, 10, 13, 16, 19, 22, 25, 28 and 31 January
2018 |
Pillar Point Fire Station |
Office |
|
AQMS1 |
3, 6, 9, 12, 15, 21, 24 and 27 February 2018 |
Previous River Trade Golf |
Bare ground |
|
ASR6 |
|
Butterfly Beach Laundry |
Office |
|
ASR10 |
|
Butterfly Beach Park |
Recreational uses |
Table
2.2 Air Quality
Monitoring Equipment
Equipment |
Brand and Model |
High Volume Sampler |
Tisch Environmental Mass Flow Controlled Total
Suspended Particulate (TSP) High Volume Sampler (Model No. TE-5170) |
Wind Meter |
Davis (Model: Vantage Pro 2 (S/N: AS160104014) |
Wind Anemometer for calibration |
Lutron (Model No. AM-4201) |
The Action and Limit Levels of the air quality
monitoring is provided in Appendix D. The Event and Action plan is presented in Appendix I.
The schedules for air quality monitoring in the
reporting quarter are provided in Appendix E.
Impact air quality monitoring was conducted at all
designated monitoring stations in the reporting period under favourable weather
conditions. The major dust sources in
the reporting period include construction activities under the Contract as well
as nearby traffic emissions.
The monitoring results for 1-hour TSP and 24-hour TSP
are summarized in Tables 2.3 and 2.4, respectively. Monitoring results are presented graphically
in Appendix F and detailed impact air quality monitoring
data were reported in the Fiftieth to Fifty-second Monthly EM&A Report.
Table 2.3 Summary of 1-hour TSP Monitoring Results in this Reporting
Period
Month/Year |
Station |
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
December 2017
to February 2018 |
ASR 1 |
159 |
13
- 443 |
331 |
500 |
ASR 5 |
196 |
13
- 455 |
340 |
500 |
|
AQMS1 |
118 |
14
- 324 |
335 |
500 |
|
ASR6 |
140 |
13
- 322 |
338 |
500 |
|
ASR10 |
113 |
13
- 333 |
337 |
500 |
Table 2.4 Summary of 24-hour TSP Monitoring Results in this Reporting
Period
Month/Year |
Station |
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
December 2017
to February 2018 |
ASR 1 |
120 |
21
- 328 |
213 |
260 |
ASR 5 |
131 |
23
- 279 |
238 |
260 |
|
AQMS1 |
84 |
16
- 177 |
213 |
260 |
|
ASR6 |
101 |
21
- 178 |
238 |
260 |
|
ASR10 |
79 |
22
- 250 |
214 |
260 |
Fifteen (15) Action Level exceedances of 1-hour TSP
were recorded in the air quality monitoring of this reporting period. Two (2) Action Level and three (3) Limit
Level exceedances of 24-hour TSP were recorded. Summary of Exceedances for Air Quality
Impact Monitoring in this Reporting Quarter is detailed in Table 2.15.
In accordance with the Updated EM&A Manual, impact
water quality monitoring was carried out three days per week during the
construction period at nine (9) water quality monitoring stations (Figure 2.2; Table
2.5).
Table 2.5 Locations of Water Quality Monitoring Stations and the Corresponding
Monitoring Requirements
Station ID |
Type |
Coordinates |
*Parameters,
unit |
Depth |
Frequency |
|
|
|
Easting |
Northing |
|
|
|
IS12 |
Impact Station |
813218 |
823681 |
Temperature(°C) pH(pH unit) Turbidity (NTU) Water depth (m) Salinity (ppt) DO (mg/L and % of saturation) · SS (mg/L) |
3 water depths: 1m below sea surface, mid-depth and 1m above sea bed. If the water depth is less than 3m,
mid-depth sampling only. If water
depth less than 6m, mid-depth may be omitted. |
Impact monitoring: 3 days per
week, at mid-flood and mid-ebb tides during the construction period of the
Contract. |
IS13 |
Impact
Station |
813667 |
824325 |
|||
IS14 |
Impact
Station |
812592 |
824172 |
|||
IS15 |
Impact
Station |
813356 |
825008 |
|||
CS4 |
Control / Far
Field Station |
810025 |
824004 |
|||
CS6 |
Control / Far
Field Station |
817028 |
823992 |
|||
SR8 |
Sensitive receiver (Gazettal beaches in Tuen Mun) |
816306 |
825715 |
|||
SR9 |
Sensitive receiver |
813601 |
825858 |
|||
SR10A |
Sensitive receiver |
823741 |
823495 |
|||
*Notes: In addition to the parameters presented
monitoring location/position, time, water depth, sampling depth, tidal
stages, weather conditions and any special phenomena or works underway nearby
were also recorded. |
Table 2.6 summarizes
the equipment used in the impact water quality monitoring programme.
Table 2.6 Water Quality Monitoring Equipment
Equipment |
Model |
Multi-Parameters |
YSI ProDss 16J101715 |
Multi-Parameters |
YSI ProDss 17E102520 |
Multi-Parameters |
YSI ProDss 16H104234 |
Multi-Parameters |
YSI ProDss 17H105557 |
Multi-Parameters |
YSI 6920 000109DF |
Multi-Parameters |
YSI 6920V2 00019CB2 |
Positioning Equipment |
Furuno GP-170 |
Water Depth Detector |
Lowrance Mark 5x / Garmin Striker 4 |
The Action and Limit levels of water quality impact
monitoring are shown in Appendix D. The Event and Action plan is presented in Appendix I.
The schedules for water quality monitoring in the
reporting quarter are provided in Appendix E.
Impact water quality monitoring was conducted at all
designated monitoring stations in the reporting quarter. Results and graphical presentations of impact
water quality monitoring are presented in Appendix G. Detailed water quality monitoring data were
reported in the Fiftieth to Fifty-second Monthly EM&A Report.
Since seawall block installation for Phase II
reclamation commenced on 1 November 2017, impact water quality monitoring
resumed on 1 November 2017. In this
reporting period, a total of thirteen (13) monitoring events were undertaken in
which Four (4) Action Level exceedances of Suspended Solids (SS) for impact
water quality monitoring were recorded. Seawall Enhancement Works at
Northern Landfall has been completed on 31 December 2017. Notification of suspension of water quality
monitoring has been approved by EPD on 2 March 2018.
Impact dolphin monitoring is required to be conducted
by a qualified dolphin specialist team to evaluate whether there have been any
effects on the dolphins. In order to
fulfil the EM&A requirements and make good use of available resources, the
on-going impact line transect dolphin monitoring data collected by HyD’s Contract No. HY/2011/03 Hong Kong-Zhuhai-Macao Bridge. Hong Kong
Link Road - Section between Scenic Hill and Hong Kong Boundary Crossing
Facilities on the monthly basis is adopted to avoid duplicates of survey
effort.
Table 2.7
summarizes the equipment used for the impact dolphin monitoring.
Table 2.7 Dolphin Monitoring Equipment
Equipment |
Model |
Global Positioning
System (GPS) Camera Laser Binoculars Marine Binocular Vessel for
Monitoring |
Garmin 18X-PC Geo One Phottix Nikon D90 300m 2.8D fixed focus Nikon D90 20-300m zoom lens Infinitor LRF 1000 Bushell 7 x 50 marine binocular with compass and reticules 65 foot single engine motor vessel with viewing platform 4.5m above
water level |
Dolphin monitoring should cover all transect lines in
Northeast Lantau (NEL) and the Northwest Lantau (NWL) survey areas twice per
month throughout the entire construction period. The monitoring data should be compatible
with, and should be made available for, long-term studies of small cetacean
ecology in Hong Kong. In order to
provide a suitable long-term dataset for comparison, identical methodology and
line transects employed in baseline dolphin monitoring was followed in the
impact dolphin monitoring.
The impact dolphin monitoring was carried out in the
NEL and NWL along the line transect as depicted in Figure 2.2. The co-ordinates of all transect lines are
shown in Table 2.8 below.
Table
2.8 Impact Dolphin Monitoring Line Transect Co-ordinates
Line No. |
Easting |
Northing |
Line No. |
Easting |
Northing |
||
1 |
Start
Point |
804671 |
815456 |
13 |
Start
Point |
816506 |
819480 |
1 |
End
Point |
804671 |
831404 |
13 |
End
Point |
816506 |
824859 |
2 |
Start
Point |
805476 |
820800* |
14 |
Start
Point |
817537 |
820220 |
2 |
End
Point |
805476 |
826654 |
14 |
End
Point |
817537 |
824613 |
3 |
Start
Point |
806464 |
821150* |
15 |
Start
Point |
818568 |
820735 |
3 |
End
Point |
806464 |
822911 |
15 |
End
Point |
818568 |
824433 |
4 |
Start
Point |
807518 |
821500* |
16 |
Start
Point |
819532 |
821420 |
4 |
End
Point |
807518 |
829230 |
16 |
End
Point |
819532 |
824209 |
5 |
Start
Point |
808504 |
821850* |
17 |
Start
Point |
820451 |
822125 |
5 |
End
Point |
808504 |
828602 |
17 |
End
Point |
820451 |
823671 |
6 |
Start
Point |
809490 |
822150* |
18 |
Start
Point |
821504 |
822371 |
6 |
End
Point |
809490 |
825352 |
18 |
End
Point |
821504 |
823761 |
7 |
Start
Point |
810499 |
822000* |
19 |
Start
Point |
822513 |
823268 |
7 |
End
Point |
810499 |
824613 |
19 |
End
Point |
822513 |
824321 |
8 |
Start
Point |
811508 |
821123 |
20 |
Start
Point |
823477 |
823402 |
8 |
End
Point |
811508 |
824254 |
20 |
End
Point |
823477 |
824613 |
9 |
Start
Point |
812516 |
821303 |
21 |
Start
Point |
805476 |
827081 |
9 |
End
Point |
812516 |
824254 |
21 |
End
Point |
805476 |
830562 |
10 |
Start
Point |
813525 |
821176 |
22 |
Start
Point |
806464 |
824033 |
10 |
End
Point |
813525 |
824657 |
22 |
End
Point |
806464 |
829598 |
11 |
Start
Point |
814556 |
818853 |
23 |
Start
Point |
814559 |
821739 |
11 |
End
Point |
814556 |
820992 |
23 |
End
Point |
814559 |
824768 |
12 |
Start
Point |
815542 |
818807 |
24* |
Start Point |
805476* |
815900* |
12 |
End
Point |
815542 |
824882 |
24* |
End Point |
805476* |
819100* |
The Action and Limit levels of dolphin impact
monitoring are shown in Appendix D. The Event and Action plan is presented in Appendix I.
The dolphin monitoring schedules for the reporting
period are shown in Appendix E.
A total of 797.53 km of survey effort was conducted,
with 88.8% of the total survey effort being conducted under favourable
weather conditions (ie Beaufort Sea State 3 or below with good visibility) in
this reporting quarter. Amongst the two
areas, 296.70 km and 500.83 km of survey effort were conducted from NEL and NWL
survey areas, respectively. The total
survey effort conducted on primary and secondary lines were 582.13 km and
215.40 km, respectively. The survey
efforts are summarized in Appendix H.
A total of 17 groups of 45 Chinese
White Dolphins sightings were recorded during the six sets of surveys
in this reporting quarter. Sixteen of the seventeen
dolphin sightings were made
during on-effort search, and fourteen of the sixteen on-effort dolphin
sightings were made on primary lines. During this reporting quarter, all dolphin
groups were sighted in NWL, while no dolphin was sighted in NEL.
Encounter rates of Chinese White Dolphins are deduced
from the survey effort and on-effort sighting data made under favourable
conditions (Beaufort 3 or below with good visibility) in the reporting quarter
with the results and comparison with baseline results present in Tables 2.9 and 2.10.
Table 2.9 Individual Survey Event Encounter Rates
|
Encounter rate (STG) (no. of on-effort dolphin sightings per 100 km of
survey effort) |
Encounter rate (ANI) (no. of dolphins from all on-effort sightings per
100 km of survey effort) |
|
Primary Lines Only |
Primary Lines Only |
||
NEL |
Set 1: Dec 5th/12th |
0.00 |
0.00 |
Set 2: Dec 15th/20th |
0.00 |
0.00 |
|
Set 3: Jan 2nd/8th |
0.00 |
0.00 |
|
Set 4: Jan 16th
/25th |
0.00 |
0.00 |
|
Set 5: Feb 2nd/9th |
0.00 |
0.00 |
|
Set 6: Feb 14th/22nd |
0.00 |
0.00 |
|
NWL |
Set 1: Dec 5th/12th |
1.66 |
8.32 |
Set 2: Dec 15th/20th |
8.39 |
22.37 |
|
Set 3: Jan 2nd/8th |
5.68 |
45.42 |
|
Set 4: Jan 16th
/25th |
3.43 |
3.43 |
|
Set 5: Feb 2nd/9th |
4.38 |
6.56 |
|
Set 6: Feb 14th/22nd |
4.97 |
8.29 |
Note: Dolphin Encounter Rates
are deduced from the Two Sets of Surveys (Two Surveys in Each Set) in the
reporting quarter in Northeast (NEL) and Northwest Lantau (NWL)
Table 2.10 Quarterly Average Encounter Rates
|
Encounter rate (STG) (no. of on-effort dolphin sightings per 100 km of
survey effort) |
Encounter rate (ANI) (no. of dolphins from all
on-effort sightings per 100 km of survey effort) |
||
September – November 2011 |
December 2017 – February 2018 |
September – November 2011 |
||
Northeast Lantau |
0.0 |
6.00 ± 5.05 |
0.0 |
22.19 ± 26.81 |
Northwest Lantau |
4.75
± 2.26 |
9.85 ± 5.85 |
15.73 ± 15.94 |
44.66 ± 29.85 |
Note: Encounter rates deduced from
the baseline monitoring period have been recalculated based only on survey
effort and on-effort sighting data made along the primary transect lines under
favourable conditions.
Group size of Chinese White
Dolphins ranged from 1 - 8 individuals per group in North Lantau region during
December 2017 to February 2018. The
average dolphin group sizes from these three months were compared with the ones
deduced from the baseline period in September to November 2011, as shown in Table 2.11.
Table 2.11 Average Dolphin Group Size
|
Average Dolphin Group Size |
|
December
2017 – February 2018 |
September – November 2011 |
|
Overall |
2.65 ± 2.50 (n = 17) |
3.72 ± 3.13 (n = 66) |
Northeast Lantau |
--- |
|
Northwest Lantau |
2.65
± 2.50 (n = 17) |
3.92 ± 3.40 (n = 49) |
Whilst two action level exceedances were observed for
the quarterly dolphin monitoring data between December 2017 and February 2018, no
unacceptable impact from the construction activities of this Contract was
recorded from the general observations.
Although the dolphins infrequently occurred along the
alignment of TM-CLKL Northern Connection Sub-Sea Tunnel Section in the past and
during the baseline monitoring period, it is apparent that dolphin usage has
been significantly reduced in NEL.
It is critical to monitor the dolphin usage in North
Lantau region in the upcoming quarters to determine whether the dolphins are
continuously affected by the various construction activities in relation to the
HZMB-related works, and whether suitable mitigation measure can be applied to
revert the situation.
Daily marine mammal exclusion zone was in effect during the period of
dredging, reclamation or marine sheet piling works in open waters under this
Contract. No sighting of the Indo-Pacific
humpback dolphin Sousa chinensis (i.e. Chinese White Dolphin) was recorded in December
2017 during the exclusion zone monitoring.
Site inspections were carried out on a weekly basis to
monitor the implementation of proper environmental pollution control and
mitigation measures under the Contract.
Thirteen (13) site inspections were carried out in the reporting quarter
on 6, 13, 20 and 27 December 2017; 3, 10, 17, 24 and 31 January 2018; 7, 14, 21
and 28 February 2018.
Key observations during the site inspections in this
reporting period are summarized in Table
2.12.
Table 2.12 Specific Observations and Recommendations during the Weekly
Site Inspection in this Reporting Period
Inspection Date |
Environmental Observations |
Recommendations/ Remarks |
|
6 December 2017 |
Works
Area – TBM tunnel
Cement bags should be covered with tarpaulin sheets.
Drip tray and proper chemical label should be
provided to the chemical containers. Works
Area - Portion S-A
Drip tray and proper chemical label should be
provided to the chemical containers. |
Works
Area – TBM tunnel
The Contractor was reminded to cover the cement bags
with tarpaulin sheets.
The Contractor was reminded to provide drip tray and
proper chemical label to the chemical containers. Works
Area - Portion S-A
The Contractor was reminded to provide drip tray and
proper chemical label to the chemical containers. |
|
13 December 2017 |
Works
Area –Portion S-B
Drip tray and proper chemical label should be
provided to the chemical containers. Works
Area - Portion N-C
Drip tray and proper chemical label should be
provided to the chemical containers. Works
Area –Portion N-B
Proper NRMM label should be displayed on the soil
compacter.
Chemical label should be displayed on the chemical
container. |
Works
Area –Portion S-B
The Contractor was reminded to provide drip tray and
proper chemical label to the chemical containers. Works
Area - Portion N-C
The Contractor was reminded to provide drip tray and
proper chemical label to the chemical containers. Works
Area –Portion N-B
The Contractor was reminded to display proper NRMM
label on the soil compacter.
The Contractor was reminded to display chemical
label on the chemical container. |
|
20 December 2017 |
Works
Area – Portion S-B
Chemical waste should be removed or stored in
chemical storage area. |
Works
Area – Portion S-B
The Contractor was reminded to remove or store the
chemical waste in chemical storage area. |
|
27 December 2017 |
Works
Area – Portion N-C
Drip tray and proper chemical label should be
provided to the oil drums. |
Works
Area – Portion N-C
The Contractor was reminded to provide drip tray and
proper chemical label to the oil drums. |
|
3 January 2018 |
Works
Area – Portion S-A
Accumulated waste in the skip should be removed. |
Works
Area – Portion S-A
The Contractor was reminded to remove the
accumulated waste in the skip. |
|
10
January 2018 |
Works
Area –Portion S-A
Drip tray and proper chemical label should be
provided for the chemical container.
Trapped water in the drip tray should be removed. Works
Area –Portion N-A
Trapped water should be pumped off to wastewater
treatment facilities.
The slope of the surcharge should be covered
entirely by tarpaulin sheets. |
Works
Area –Portion S-A
The Contractor was reminded to provide drip tray and
proper chemical label for the chemical container.
The Contractor was reminded to remove trapped water
in the drip tray. Works
Area –Portion N-A
The Contractor was reminded to pump off the trapped
water to wastewater treatment facilities.
The Contractor was reminded to cover the slope of
the surcharge by tarpaulin sheets entirely. |
|
17 January
2018 |
Works
Area – TBM tunnel
Drip tray and proper chemical label should be
provided for the chemical container. Works
Area - Portion S-C
Trapped water in the drip tray should be removed.
Trapped water in the drip tray should be removed. |
Works
Area – TBM tunnel
The Contractor was reminded to provide drip tray and
proper chemical label for the chemical container. Works
Area - Portion S-C
The Contractor was reminded to remove trapped water
in the drip tray.
The Contractor was reminded to remove trapped water
in the drip tray. |
|
24
January 2018 |
Works
Area – Portion N-C
Chemical container should be placed in proper
storage area.
Drip tray and proper chemical label should be
provided for the chemical container. Works
Area - Portion S-B
Drip tray should be provided for the chemical
container. |
Works
Area – Portion N-C
The Contractor was reminded to place the chemical
container in proper storage area.
The Contractor was reminded to provide drip tray and
proper chemical label for the chemical container. Works
Area - Portion S-B
The Contractor was reminded to provide drip tray for
the chemical container. |
|
31 January
2018 |
Works
Area – Portion N-C
Accumulated general refuse in the skip should be
removed. Works
Area - Portion N-A
Surcharge stockpiles should be entirely covered with
tarpaulin sheets. Works
Area - Portion S-B
Cement bags should be entirely covered with
tarpaulin sheets. |
Works
Area – Portion N-C
The Contractor was reminded to remove the
accumulated general refuse in the skip. Works
Area - Portion N-A
The Contractor was reminded to cover the surcharge
stockpiles entirely with tarpaulin sheets. Works
Area - Portion S-B
The Contractor was reminded to cover the cement bags
entirely with tarpaulin sheets. |
|
7
February 2018 |
Works
Area – TBM tunnel
Waste skip should be classified into inert waste
type and non-inert waste type. Works
Area –Portion S-B
Drip tray should be provided for the oil drums.
Cement bags should be entirely covered with
tarpaulin sheets. |
Works
Area – TBM tunnel
The Contractor was reminded to classify the waste
skip into inert waste type and non-inert waste type. Works
Area –Portion S-B
The Contractor was reminded to provide drip tray for
the oil drums.
The Contractor was reminded to cover the cement bags
entirely with tarpaulin sheets. |
|
14 February
2018 |
Works
Area –Portion N-C
Accumulated waste in the skip should be removed.
Drip tray should be provided for the chemical
containers. Works
Area –Portion S-A
Drip tray should be provided for the chemical
containers. |
Works
Area –Portion N-C
The Contractor was reminded to remove the
accumulated waste in the skip.
The Contractor was reminded to provide drip tray for
the chemical containers. Works
Area –Portion S-A
The Contractor was reminded to provide drip tray for
the chemical containers. |
|
21
February 2018 |
Works
Area – Portion S-B
Water spraying should be applied on site regularly.
Drip tray should be provided for the chemical
containers.
The grout mixer should be entirely covered by
tarpaulin sheets with 3 sides and the top. Works
Area - TBM tunnel
Drip tray should be provided for the chemical
containers.
Drip tray should be provided for the chemical
containers. |
Works
Area – Portion S-B
The Contractor was reminded to apply water spraying
on site regularly.
The Contractor was reminded to provide drip tray for
the chemical containers.
The Contractor was reminded to cover the grout mixer
entirely by tarpaulin sheets with 3 sides and the top. Works
Area - TBM tunnel
The Contractor was reminded to provide drip tray for
the chemical containers.
The Contractor was reminded to provide drip tray for
the chemical containers. |
|
28
February 2018 |
Works
Area – Portion N-C
Drip tray should be provided for the water proofing
material.
Stagnant water in the wheelbarrow should be removed.
Cement bags should be covered with tarpaulin
sheeting. Works
Area - Portion S-B Drip
tray should be cleaned up to avoid oil leakage. |
Works
Area – Portion N-C
The Contractor was reminded to provide drip tray for
the water proofing material.
The Contractor was reminded to remove the stagnant
water in the wheelbarrow.
The Contractor was reminded to cover the cement bags
with tarpaulin sheeting. Works
Area - Portion S-B The
Contractor was reminded to clean up the drip tray to avoid oil leakage. |
|
The Contractor had submitted application form for
registration as chemical waste producer under the Contract. Sufficient numbers of receptacles were
available for general refuse collection and sorting.
Wastes generated during this reporting period include
mainly construction wastes (inert and non-inert) and chemical wastes. Reference
has been made to the waste flow table prepared by the Contractor (Appendix K). The
quantities of different types of wastes are summarized in Table 2.13.
Table 2.13 Quantities of Different Waste Generated in the Reporting
Period
Month/Year |
Inert Construction Waste (a)
(tonnes) |
Inert Construction Waste Re-used (tonnes) |
Non-inert Construction Waste (b)
(tonnes) |
Recyclable Materials (c) (kg) |
Chemical Wastes (kg) |
Marine Sediment (m3) |
|
|
Category L |
Category M |
|
||||||
December 2017 |
3574 |
0 |
121 |
0 |
0 |
0 |
3942 |
|
January 2018 |
7,165 |
0 |
272 |
200 |
2800 |
0 |
11,357 |
|
February 2018 |
1,762 |
0 |
258 |
200 |
0 |
0 |
2,840 |
|
Total |
12,501 |
0 |
651 |
400 |
2,800 |
0 |
18,139 |
|
Notes: |
||||||||
(a) Inert
construction wastes include hard rock and large broken concrete, and
materials disposed as public fill. (b) Non-inert
construction wastes include general refuse disposed at landfill. (c) Recyclable
materials include metals, paper, cardboard, plastics, timber and others. |
The Contractor was advised to properly maintain on
site C&D materials and waste 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 was also reminded to properly maintain the site tidiness
and dispose of the wastes accumulated on site regularly and properly.
For chemical waste containers, the Contractor was
reminded to treat properly and store temporarily in designated chemical waste
storage area on site in accordance with the Code of Practice on the Packaging,
Labelling and Storage of Chemical Wastes.
The status of environmental licensing and permit is
summarized in Table 2.14 below.
Table 2.14 Summary of Environmental Licensing and Permit Status
License/ Permit |
License or Permit No. |
Date of Issue |
Date of Expiry |
License/ Permit Holder |
Remarks |
Environmental
Permit |
EP-354/2009/D |
13
March 2015 |
Throughout
the Contract |
HyD |
Application for VEP on 3 March 2015 to supersede
EP-354/2009/C |
Construction
Dust Notification |
363510 |
19
August 2013 |
Throughout
the Contract |
DBJV |
Northern Landfall |
Construction
Dust Notification |
403620 |
10 June 2016 |
Throughout
the Contract |
DBJV |
Southern Landfall |
Chemical
Waste Registration |
5213-422-D2516-02 |
18 January 2017 |
Throughout
the Contract |
DBJV |
Northern Landfall |
Chemical
Waste Registration |
5213-951-D2591-01 |
25 May 2016 |
Throughout
the Contract |
DBJV |
Southern Landfall |
Construction
Waste Disposal Account |
7018108 |
28
August 2013 |
Throughout
the Contract |
DBJV |
Waste disposal in Contract No. HY/2012/08 |
Waste
Water Discharge License |
WT00017707-2013 |
18
November 2013 |
30
November 2018 |
DBJV |
For site WA18 |
Waste
Water Discharge License |
WT00019248-2014 |
5
June 2014 |
30
June 2019 |
DBJV |
For site Portion N6 and Reclamation Area E |
Waste
Water Discharge License |
WT00018433-2014 |
6 March 2014 |
31 March 2019 |
DBJV |
N6 Site |
Waste
Water Discharge License |
WT00025944-2016 |
15 December 2016 |
31 December 2021 |
DBJV |
Southern Landfall |
Marine
Dumping Permit |
EP/MD/18-118 |
21 January 2018 |
20 February 2018 |
DBJV |
Type 1 (Dedicated site) and Type 2 (Confined Marine
Disposal) |
Marine
Dumping Permit |
EP/MD/18-098 |
21 December 2017 |
20 January 2018 |
DBJV |
Type 1 (Dedicated site) and Type 2 (Confined Marine
Disposal) |
Marine
Dumping Permit |
EP/MD/18-125 |
21 February 2018 |
20 March 2018 |
DBJV |
Type 1 (Dedicated site) and Type 2 (Confined Marine
Disposal) |
Construction
Noise Permit |
GW-RW0538-17 |
16 October 2017 |
15 April 2018 |
DBJV |
For
Urmston Road in front of Pillar Point |
Construction
Noise Permit |
GW-RW0641-17 |
16 December 2017 |
6 December 2018 |
DBJV |
WA23
@ Tsing Yi |
Construction Noise Permit |
PP-RS0026-17 |
1 December 2017 |
29 March 2018 |
DBJV |
Southern Landfall (Percussive Piling) |
Construction Noise Permit |
GW-RS0878-17 |
11 October 2017 |
2 April 2018 |
DBJV |
Southern Landfall |
Construction Noise Permit |
GW-RW0060-18 |
20 February 2018 |
19 August 2018 |
DBJV |
WA23
@ Tsing Yi |
Construction Noise Permit |
GW-RS0027-18 |
22 January 2018 |
14 July 2018 |
DBJV |
Southern
Landfall |
Notes: |
|||||
HyD
= Highways Department DBJV
= Dragages – Bouygues Joint Venture VEP
= Variation of Environmental Permit |
In response to the site audit findings, the
Contractors carried out all corrective actions.
A summary of the Implementation Schedule of
Environmental Mitigation Measures (EMIS) is presented in Appendix C. The necessary mitigation measures relevant to
this Contract were implemented properly.
For
air quality impact monitoring, a total of twenty-nine monitoring events for
both 1-hour TSP and 24-hour TSP were undertaken in which fifteen (15) Action
Level exceedances of 1-hour TSP were recorded in the air quality monitoring of
this reporting period. Two (2) Action
Level and three (3) Limit Level exceedances of 24-hour TSP were recorded. (Table 2.15).
Table 2.15 Summary of
Exceedances for Air Quality Impact Monitoring in this Reporting Quarter
Station |
Exceedance Level |
Date of Exceedances |
Number of Exceedances |
|||
1-hr TSP |
24-hr TSP |
1-hr TSP |
24-hr TSP |
|||
AQMS1 |
Action Level |
- |
- |
- |
- |
|
Limit Level |
- |
- |
- |
- |
||
ASR1 |
Action Level |
2018-12-08 |
- |
- |
- |
|
|
2018-12-11 |
2018-12-11 |
2 |
1 |
||
|
2018-12-20 |
- |
1 |
- |
||
|
2017-12-26 |
- |
1 |
- |
||
|
2018-02-03 |
- |
1 |
- |
||
Limit Level |
- |
2018-12-08 |
- |
1 |
||
ASR5 |
Action Level |
2017-12-08 |
- |
1 |
- |
|
|
2018-12-20 |
- |
1 |
- |
||
|
2018-12-11 |
- |
1 |
- |
||
|
2018-01-13 |
- |
1 |
- |
||
|
2018-01-16 |
- |
3 |
- |
||
|
2018-01-22 |
- |
2 |
- |
||
|
2018-02-03 |
- |
1 |
- |
||
Limit Level |
2017-12-08 |
- |
- |
1 |
||
|
|
2017-12-17 |
- |
- |
1 |
|
ASR6 |
Action Level |
- |
- |
- |
- |
|
Limit Level |
- |
- |
- |
- |
||
ASR10 |
Action Level |
- |
2017-12-29- |
- |
1 |
|
Limit Level |
- |
- |
- |
- |
||
Total number
of Action level Exceedances: |
15 |
2 |
||||
Total number
of Limit level Exceedances: |
0 |
3 |
||||
For marine water quality impact monitoring, a total of
thirteen monitoring events were undertaken in which Four (4) Action Level
exceedances of Suspended Solids (SS) were recorded in the water quality
monitoring of this reporting period. (Table
2.17). In addition, the construction
impact on depth-averaged SS was assessed to compare the quarterly mean values
of depth-averaged SS with the relevant ambient mean values. Results showed that the quarterly mean values
of depth-averaged SS at all monitoring stations are well below the ambient mean
values (Table 2.16). Therefore, no further action is required in
accordance with the Updated EM&A Manual.
Table 2.16 Comparison between Quarterly Mean and Ambient Mean Values of
Depth-averaged Suspended Solids
Station |
Baseline
Mean |
Ambient
Mean (a) |
Quarterly Mean (December 2017) |
|||
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
|
CS4 |
10.2 |
9.0 |
13.3 |
11.7 |
7.98 |
11.13 |
CS6 |
10.9 |
11.7 |
14.1 |
15.2 |
6.17 |
8.08 |
IS12 |
9.2 |
9.5 |
12.0 |
12.3 |
10.66 |
9.32 |
IS13 |
10.0 |
10.5 |
13.0 |
13.7 |
10.75 |
11.28 |
IS14 |
10.4 |
9.7 |
13.5 |
12.6 |
8.30 |
12.04 |
IS15 |
9.6 |
11.0 |
12.5 |
14.2 |
8.12 |
12.18 |
SR10A |
10.3 |
10.2 |
13.3 |
13.3 |
7.04 |
9.93 |
SR8 |
10.1 |
11.3 |
13.1 |
14.7 |
8.64 |
9.46 |
SR9 |
8.8 |
9.9 |
11.4 |
12.8 |
7.23 |
8.78 |
Grand Total |
10.0 |
10.3 |
13.0 |
13.4 |
8.32 |
10.24 |
Notes: |
||||||
(a) Ambient mean value is defined as a 30%
increase of the baseline mean value |
Table 2.17 Summary of Exceedances for Marine Water Quality Impact
Monitoring in this Reporting Quarter
Station |
Exceedance Level (a) |
DO (Surface and Middle) |
DO (Bottom) |
Turbidity (depth-averaged) |
SS (depth-averaged) |
|
||||||
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
|
||||
CS4 |
AL |
- |
- |
- |
- |
- |
- |
|
|
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
CS6 |
AL |
- |
- |
- |
- |
- |
- |
|
|
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
IS12 |
AL |
- |
- |
- |
- |
- |
- |
|
|
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
IS13 |
AL |
- |
- |
- |
- |
- |
- |
|
|
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
IS14 |
AL |
- |
- |
- |
- |
- |
- |
|
2017-12-08 |
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
IS15 |
AL |
- |
- |
- |
- |
- |
- |
|
2017-12-06 |
|
||
|
|
|
|
|
|
|
|
2017-12-08 |
|
|||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
SR8 |
AL |
- |
- |
- |
- |
- |
- |
|
|
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
SR9 |
AL |
- |
- |
- |
- |
- |
- |
|
|
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
SR10A |
AL |
- |
- |
- |
- |
- |
- |
|
2017-12-08 |
|
||
LL |
- |
- |
- |
- |
- |
- |
|
|
|
|||
Total AL
Exceedances: |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
4 |
|
|||
Total LL Exceedances: |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
|||
Notes: |
||||||||||||
(a) AL = Action Level; LL = Limit Level |
||||||||||||
Two (2) Action Level exceedances were observed for the
quarterly dolphin monitoring data between December 2017 and February 2018,
whilst no unacceptable impact from the construction activities of the TM-CLKL
Northern Connection Sub-sea Tunnel Section on Chinese White Dolphins was
noticeable from general observations.
Cumulative statistics are provided in Appendix J.
The Environmental Complaint Handling Procedure is
provided in Figure 2.3.
One
(1) environmental complaint case regarding air, noise and light pollution at Tuen
Mun Pier was referred by IEC on 30 January 2018.
No environmental summons was received in this
reporting period.
Statistics on complaints, notifications of summons and
successful prosecutions are summarized in Appendix J.
As informed by the Contractor, the major works for the
Project in the coming quarter are summarized in Table 3.1.
Table 3.1 Construction Works to Be Undertaken in the Coming Quarter
Works to be undertaken |
Land-based
Works ·
Box Culvert Extension at Works Area – Portion N-A; ·
Construction of North Ventilation Building – Portion
N-C; ·
Construction of Cross Passage Tympanum – TBM tunnel; ·
Cross Passage Lining Installation – TBM Tunnel; ·
Excavation of Sub-sea Tunnel – TBM tunnel; ·
Corbel Construction – TBM Tunnel; ·
Bulk Excavation – Portion S-A; ·
TBM Excavation – Portion S-A; ·
CSM treatment, Jet Grouting works and D-wall
Construction; and ·
Ground Freezing Works – Portion S-A Marine-based
Works ·
Seawall Modification Works – Portion S-A |
Potential environmental impacts arising from the above
upcoming construction activities in the coming quarterly period are expected to
be mainly associated with dust, marine water quality, marine ecology and waste
management issues.
Impact monitoring for air quality and
marine ecology (include dolphin monitoring) are scheduled to continue for the
next reporting period.
The monitoring programme has been reviewed and
was considered as adequate to cater for the nature of works in progress. Change to the monitoring programme
was thus not considered to be necessary at this stage. The monitoring programme will be evaluated as
appropriate in the next reporting period.
This Seventeenth Quarterly EM&A Report presents
the findings of the EM&A activities undertaken during the period from 1
December 2017 to 28 February 2017, in accordance with the Updated EM&A
Manual and the requirements of EP-354/2009/D.
Air quality (including 1-hour TSP and 24-hour TSP),
water quality monitoring and dolphin monitoring were carried out in the
reporting period. Fifteen
(15) Action Level exceedances of 1-hour TSP were recorded in the air quality
monitoring of this reporting period. Two
(2) Action Level and three (3) Limit Level exceedances of 24-hour TSP were
recorded.
Four (4) Action Level exceedances of Suspended Solids (SS) were
recorded in the water quality monitoring of this reporting period.
A total of 17 groups of 45 Chinese
White Dolphins sightings were recorded during the six sets of surveys
in this reporting quarter. Sixteen of the seventeen
dolphin sightings were made
during on-effort search, and fourteen of the sixteen on-effort dolphin
sightings were made on primary lines. Whilst two action level exceedances were
observed for the quarterly dolphin monitoring data between December 2017 and February
2018, no unacceptable impact from the construction activities of this
Contract was recorded from the general observations. Although the dolphins infrequently occurred
along the alignment of TM-CLKL Northern Connection Sub-Sea Tunnel Section in
the past and during the baseline monitoring period, it is apparent that dolphin
usage has been significantly reduced in NEL.
It is critical to monitor the dolphin usage in North Lantau region in
the upcoming quarters, to determine whether the dolphins are continuously
affected by the various construction activities in relation to the construction
works of the Contract, and whether suitable mitigation measure can be applied
to improve the situation.
Thirteen weekly environmental site inspections
were carried out in the reporting period.
Recommendations on remedial actions provided for the deficiencies
identified during the site audits were properly implemented by the Contractor. No non-compliance event was
recorded during the reporting period.
The monitoring programme has been reviewed and was considered as
adequate to cater for the nature of works in progress. Change to the monitoring programme
was thus not recommended at this stage.
The monitoring programme will be evaluated as appropriate in the next
reporting period. The ET will keep track
on the construction works to confirm compliance of environmental requirements
and the proper implementation of all necessary mitigation measures.