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 Environ 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 Sixteenth Quarterly EM&A report
presenting the EM&A works carried out during the period from 1 September
2017 to 30 November 2017 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;
·
Excavation of Sub-sea Tunnel – TBM tunnel;
·
Corbel Construction – TBM Tunnel;
·
Phase 2 Surcharge Removal – Portion N-A;
·
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 November 2017 during the exclusion zone monitoring.
Summary of Breaches of Action/Limit Levels
Breaches of
Action and Limit Levels for Air Quality
Fourteen (14) Action Level exceedances and two (2)
Limit Level exceedance of 1-hour TSP were recorded in the air quality
monitoring of this reporting period. One
(1) Action Level exceedances of 24-hour TSP was recorded. Investigation report is provided in Appendix J.
Breaches of
Action and Limit Levels for Water Quality
Ten (10) 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
one (1) Limit Level exceedance was observed for the quarterly dolphin
monitoring data between September and November 2017, 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 light pollution at Tuen Mun Pier was
referred by IEC on 25 October 2017.
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;
·
Phase 2 Surcharge Removal – Portion N-A;
·
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 Enhancement works – Portion N-C
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 Environ 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
Environ 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 |
Jovy Tam |
2271 3113 |
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; ·
Excavation of Sub-sea Tunnel – TBM tunnel; ·
Corbel Construction – TBM Tunnel; ·
Phase 2 Surcharge Removal – Portion N-A; ·
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 – September 2017 to November
2017
|
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 |
3, 6, 9, 12, 15, 18, 21, 24, 27 and 30 September
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 |
3, 6, 9, 12, 18, 21, 24, 27 and 30 October 2017 |
Pillar Point Fire Station |
Office |
|
AQMS1 |
2, 5, 8, 11, 14, 17, 20, 23, 26 and 29 November 2017 |
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 AQM on 15/10/2017 was cancelled due to
adverse weather.
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 Forty-seventh
to Forty-ninth 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) |
September 2017
to November 2017 |
ASR 1 |
179 |
52
- 545 |
331 |
500 |
ASR 5 |
185 |
59
- 456 |
340 |
500 |
|
AQMS1 |
118 |
32
- 473 |
335 |
500 |
|
ASR6 |
149 |
50
- 388 |
338 |
500 |
|
ASR10 |
113 |
18
- 816 |
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) |
September 2017
to November 2017 |
ASR 1 |
120 |
35
- 220 |
213 |
260 |
ASR 5 |
100 |
30
- 222 |
238 |
260 |
|
AQMS1 |
69 |
28
- 207 |
213 |
260 |
|
ASR6 |
79 |
32
- 150 |
238 |
260 |
|
ASR10 |
79 |
26
- 205 |
214 |
260 |
Fourteen (14) Action Level exceedances and two (2) Limit
Level exceedance of 1-hour TSP were recorded in the air quality monitoring of
this reporting period. One (1) Action
Level exceedance of 24-hour TSP was 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 |
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 Forty-seventh to Forty-ninth 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 Ten (10) Action Level exceedances of Suspended Solids (SS) for impact
water quality monitoring were recorded.
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 802.12 km of survey effort was conducted,
with 96.0% 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, 297.00 km and 505.12 km of survey effort were
conducted from NEL and NWL survey areas, respectively. The total survey effort conducted on primary
and secondary lines were 578.16 km and 223.96 km, respectively. The survey efforts are summarized in Appendix H.
A total of 13 groups of 50 Chinese White Dolphins
sightings were recorded during the six sets of surveys
in this reporting quarter. All thirteen dolphin
sightings were made
during on-effort search, and twelve of the thirteen 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: Sep 15th/18th |
0.00 |
0.00 |
Set 2: Sep 22th/29th |
0.00 |
0.00 |
|
Set 3: Oct 4th/9th |
0.00 |
0.00 |
|
Set 4: Oct 18th
/26th |
0.00 |
0.00 |
|
Set 5: Nov 1st/8th |
0.00 |
0.00 |
|
Set 6: Nov 17th/24th |
0.00 |
0.00 |
|
NWL |
Set 1: Sep 15th/18th |
0.00 |
0.00 |
Set 2: Sep 22th/29th |
3.63 |
16.34 |
|
Set 3: Oct 4th/9th |
1.86 |
9.30 |
|
Set 4: Oct 18th
/26th |
4.89 |
4.89 |
|
Set 5: Nov 1st/8th |
4.99 |
26.60 |
|
Set 6: Nov 17th/24th |
3.33 |
5.00 |
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 2017 |
September
– November 2011 |
September
– November 2017 |
September
– November 2011 |
|
Northeast Lantau |
0.0 |
6.00 ± 5.05 |
0.0 |
22.19 ± 26.81 |
Northwest Lantau |
3.12
± 1.91 |
9.85 ± 5.85 |
10.35 ± 9.66 |
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 - 12 individuals per group in North Lantau region during
September 2017 to November 2017. 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 |
|
September
– November 2017 |
September - November 2011 |
|
Overall |
3.85
± 3.39 (n = 13) |
3.72
± 3.13 (n = 66) |
Northeast Lantau |
--- |
3.18
± 2.16 (n = 17) |
Northwest Lantau |
3.85
± 3.39 (n = 13) |
3.92
± 3.40 (n = 49) |
Whilst one limit level exceedance was observed for the
quarterly dolphin monitoring data between September 2017 and November 2017, 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 November 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 September 2017; 4, 11, 18 and 25 October 2017; 1, 8, 15, 22
and 29 November 2017.
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 September
2017 |
Works
Area - Portion N-C Drip
tray should be provided to the oil drum. Reminder
from SOR Works
Area - Portion N-B Stagnant
water should be removed. Works
Area - Portion S-B Stagnant
water on the concrete block should be removed. Label
should be displayed on the discharge point and pipe. |
Works
Area - Portion N-C The
Contractor was reminded to provide drip tray to the oil drum. Reminder
from SOR Works
Area - Portion N-B The
Contractor was reminded to remove the stagnant water. Works
Area - Portion S-B The
Contractor was reminded to remove the stagnant water on the concrete block. The
Contractor was reminded to display label on the discharge point and pipe. |
|
13
September 2017 |
Works
Area – TBM tunnel Cements
bags should be covered by impervious sheeting. Drip
tray should be provided for the chemical container. Works
Area - Portion S-B Adequate
drip tray should be provided for chemical storage. Repaired
drip tray should be provided for the machine. |
Works
Area – TBM tunnel The
Contractor was reminded to cover the cement bags with impervious sheeting. The
Contractor was reminded to provide drip tray for the chemical container. Works
Area - Portion S-B The
Contractor was reminded to provide adequate drip tray for chemical storage. The
Contractor was reminded to provide repaired drip tray for the machine. |
|
20 September
2017 |
Works
Area – Portion N-C Drip
tray should be provided for the chemical container. Works
Area - Portion N-B Cement
bags should be covered with tarpaulin sheeting. Works
Area - Portion S-B Drip
tray should be provided for the chemical container. Drip
tray should be provided for the chemical container. Reminder
from SOR: Proper
label should be displayed on the water pipe. |
Works
Area – Portion N-C The
Contractor was reminded to provide drip tray for the chemical container. Works
Area - Portion N-B The
Contractor was reminded to cover the cement bags with tarpaulin sheeting. Works
Area - Portion S-B The
Contractor was reminded to provide drip tray for the chemical container. The
Contractor was reminded to provide drip tray for the chemical container. Reminder
from SOR: The
Contractor was reminded to put proper label on the water pipe. |
|
27
September 2017 |
Works
Area – Portion N-C Accumulated
rubbish should be removed from the waste container. Works
Area – Portion N-A Drip
tray should be provided for the oil drum. The
surface of slope should be covered with tarpaulin sheeting. Works
Area - Portion S-B Cement
bags should be covered with tarpaulin sheeting. |
Works
Area – Portion N-C The
Contractor was reminded to remove accumulated rubbish from the waste
container. Works
Area – Portion N-A The
Contractor was reminded to provide drip tray for the oil drum. The
Contractor was reminded to cover the surface of slope with tarpaulin
sheeting. Works
Area - Portion S-B The
Contractor was reminded to cover the cement bags with tarpaulin sheeting. |
|
4 October 2017 |
Works
Area - Portion S-A Accumulated
rubbish should be removed from the waste container.. Works
Area - Portion S-B Stagnant
water should be removed and chemical labels should be provided for the
chemical drums. Accumulated
rubbish should be removed from the waste container. 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-A The
Contractor was reminded to remove accumulated rubbish from the waste
container. Works
Area - Portion S-B The
Contractor was reminded to remove the stagnant water and provide chemical
labels for the chemical drums. The
Contractor was reminded to remove accumulated rubbish from the waste
container. 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. |
|
11
October 2017 |
Works
Area –Portion N-C Water
spraying should be applied more frequently during dry conditions. Works
Area - Portion N-A Water
spraying should be applied more frequently during dry conditions. Reminder
from SOR: Works
Area - Portion N-C Stagnant
water should be removed and larvacide should be sprayed regularly. Works
Area - Portion S-B Stagnant
water should be removed. |
Works
Area –Portion N-C The
Contractor was reminded to apply water spraying more frequently during dry
conditions. Works
Area - Portion N-A The
Contractor was reminded to apply water spraying more frequently during dry
conditions. Reminder
from SOR: Works
Area - Portion N-C The
Contractor was reminded to remove the stagnant water and spray larvacide
regularly. Works
Area - Portion S-B The
Contractor was reminded to remove the stagnant water. |
|
18 October
2017 |
Works
Area – TBM tunnel Drip
tray should be provided for the chemical containers. Works
Area - Portion S-B Drip
tray should be provided for the chemical containers. |
Works
Area – TBM tunnel The
Contractor was reminded to provide drip tray for the chemical containers. Works
Area - Portion S-B The
Contractor was reminded to provide drip tray for the chemical containers. |
|
25
October 2017 |
Works
Area – Portion N-C Drip
tray should be provided for the chemical containers. Works
Area – Portion N-A "Stop
work" label should be put on the unused grouting machine. Works
Area - Portion S-B Slurry
paddles should be tidied up. |
Works
Area – Portion N-C The
Contractor was reminded to provide drip tray for the chemical containers. Works
Area – Portion N-A The
Contractor was reminded to put the "Stop work" label on the unused
grouting machine. Works
Area - Portion S-B The
Contractor was reminded to tidy up the slurry paddles. |
|
1 November
2017 |
Works
Area – TBM tunnel Accumulated
waste in the skip should be removed. Drip
tray should be provided for the chemical containers. Works
Area - Portion S-B Drip
tray should be provided for the chemical containers. Accumulated
waste in the skip should be removed. |
Works
Area – TBM tunnel 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-B The
Contractor was reminded to provide drip tray for the chemical containers. The
Contractor was reminded to remove the accumulated waste in the skip. |
|
8
November 2017 |
Works
Area –Portion N-C Accumulated
waste in the skip should be removed. Works
Area - Portion N-A Standard
NRMM label should be displayed on the generator. Works
Area –Portion S-B Proper
label should be provided to identify the waste sorting area. Cement
bags should be covered with tarpaulin sheets. Proper
label showing the direction of flow should be displayed on the water pipe. |
Works
Area –Portion N-C The
Contractor was reminded to remove the accumulated waste in the skip. Works
Area - Portion N-A The
Contractor was reminded to displayed standard NRMM label on the generator. Works
Area –Portion S-B The
Contractor was reminded to provide proper label to identify the waste sorting
area. The
Contractor was reminded to cover the cement bags with tarpaulin sheets. The
Contractor was reminded to display proper label showing the direction of flow
on the water pipe. |
|
15 November
2017 |
Works
Area – Portion S-A Proper
NRMM label should be displayed on the generator. Drip
tray should be provided for the oil drums. Works
Area - Portion S-C Proper
chemical label should be displayed on the chemical containers. Works
Area - Portion N-B Proper
chemical label should be displayed on the oil drums. Proper
chemical label should be displayed on the oil drums. |
Works
Area – Portion S-A The
Contractor was reminded to display proper NRMM label on the generator. The
Contractor was reminded to provide drip tray for the oil drums. Works
Area - Portion S-C The
Contractor was reminded to display proper chemical labels on the chemical
containers. Works
Area - Portion N-B The
Contractor was reminded to display proper chemical labels on the oil drums. The
Contractor was reminded to display proper chemical labels on the oil drums. |
|
22
November 2017 |
Works
Area – Portion N-C Drip
tray and proper chemical label should be provided to the chemical containers. Accumulated
general refuse should be removed. Cement
bags should be covered with tarpaulin sheeting. Works
Area – Portion S-A Cement
bags should be covered with tarpaulin sheeting. Drip
tray and proper chemical label should be provided 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. The
Contractor was reminded to remove accumulated general refuse. The
Contractor was reminded to cover cement bags with tarpaulin sheeting. Works
Area – Portion S-A The
Contractor was reminded to cover cement bags with tarpaulin sheeting. The
Contractor was reminded to provide drip tray and proper chemical label to the
chemical containers. |
|
29
November 2017 |
Works
Area – Portion N-C Drip
tray and proper chemical label should be provided to the chemical containers. Drip
tray and proper chemical label should be provided to the chemical containers. Works
Area – Portion S-A General
refuse should be disposed of to the waste containers. Accumulated
water on the ground should be removed. |
Works
Area – Portion N-C The
Contractor was reminded to provide drip tray and proper chemical label to the
chemical containers. 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 dispose of the general refuse to the waste
containers. The
Contractor was reminded to remove the accumulated water on the ground. |
|
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 |
|
||||||
September 2017 |
886 |
0 |
300 |
200 |
0 |
0 |
0 |
|
October 2017 |
706 |
0 |
244 |
132,270 |
0 |
0 |
2,312 |
|
November 2017 |
3259 |
0 |
345 |
343,470 |
3,800 |
0 |
5,836 |
|
Total |
4,851 |
0 |
889 |
475,940 |
3,800 |
0 |
8,148 |
|
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 |
WT00018433-2014 |
6 March 2014 |
31 March 2019 |
DBJV |
N6 Site |
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 |
WT00025944-2016 |
15 December 2016 |
31 December 2021 |
DBJV |
Southern Landfall |
Marine
Dumping Permit |
EP/MD/18-036 |
21 October 2017 |
20 November 2017 |
DBJV |
Type 1 (Dedicated site) and Type 2 (Confined Marine
Disposal) |
Marine
Dumping Permit |
EP/MD/18-087 |
21 November 2017 |
20 December 2017 |
DBJV |
Type 1 (Dedicated site) and Type 2 (Confined Marine
Disposal) |
Construction
Noise Permit |
GW-RW0247-17 |
19 May 2017 |
9 November 2017 |
DBJV |
For
Urmston Road in front of Pillar Point |
Construction
Noise Permit |
GW-RW0279-17 |
13 June 2017 |
12 December 2017 |
DBJV |
WA23
@ Tsing Yi |
Construction Noise Permit |
GW-RS0713-17 |
1 September 2017 |
28 February 2018 |
DBJV |
Southern Landfall |
Construction Noise Permit |
GW-RS0878-17 |
11 October 2017 |
2 April 2018 |
DBJV |
Southern Landfall |
Construction
Noise Permit |
GW-RW0538-17 |
16 October 2017 |
15 April 2018 |
DBJV |
For
Urmston Road in front of Pillar Point |
Construction Noise Permit |
PP-RS0019-17 |
31
August 2017 |
30 November 2017 |
DBJV |
Southern Landfall (Percussive Piling) |
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 fourteen (14) Action
Level exceedances and two (2) Limit Level exceedance of 1-hour TSP were
recorded in the air quality monitoring of this reporting period. One (1) Action Level exceedance of 24-hour
TSP was 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 |
2017-09-18 |
- |
1 |
0 |
Limit Level |
- |
- |
0 |
0 |
|
ASR1 |
Action Level |
2017-09-12 |
- |
2 |
0 |
|
2017-10-21 |
- |
2 |
1 |
|
Limit Level |
2017-09-12 |
- |
1 |
0 |
|
ASR5 |
Action Level |
2017-09-12 |
- |
1 |
0 |
|
2017-09-27 |
- |
2 |
0 |
|
|
2017-10-27 |
- |
1 |
0 |
|
|
2017-11-02 |
- |
1 |
0 |
|
|
2017-11-11 |
- |
1 |
0 |
|
Limit Level |
- |
- |
0 |
0 |
|
ASR6 |
Action Level |
2017-10-27 |
- |
1 |
0 |
Limit Level |
- |
- |
0 |
0 |
|
ASR10 |
Action Level |
2017-11-02 |
- |
1 |
0 |
|
2017-11-29 |
|
1 |
0 |
|
Limit Level |
2017-11-02 |
- |
1 |
0 |
|
Total number
of Action level Exceedances: |
14 |
1 |
|||
Total number
of Limit level Exceedances: |
2 |
0 |
For marine water quality impact monitoring, a total of
thirteen monitoring events were undertaken in which Ten (10) 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 most monitoring stations are well below the ambient
mean values (Table 2.16). Quarterly mean values of depth-averaged SS at
IS14 and IS15 are higher than the ambient mean values. As the quarterly mean is
not significantly higher than the 1.3 ambient mean value, 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 (November 2017) |
|||
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
|
CS4 |
10.2 |
9.0 |
13.3 |
11.7 |
7.69 |
9.83 |
CS6 |
10.9 |
11.7 |
14.1 |
15.2 |
7.29 |
9.49 |
IS12 |
9.2 |
9.5 |
12.0 |
12.3 |
10.01 |
10.68 |
IS13 |
10.0 |
10.5 |
13.0 |
13.7 |
9.90 |
13.07 |
IS14 |
10.4 |
9.7 |
13.5 |
12.6 |
8.80 |
15.38 |
IS15 |
9.6 |
11.0 |
12.5 |
14.2 |
7.14 |
14.71 |
SR10A |
10.3 |
10.2 |
13.3 |
13.3 |
7.74 |
9.64 |
SR8 |
10.1 |
11.3 |
13.1 |
14.7 |
8.41 |
11.97 |
SR9 |
8.8 |
9.9 |
11.4 |
12.8 |
8.38 |
11.24 |
Grand Total |
10.0 |
10.3 |
13.0 |
13.4 |
8.37 |
11.78 |
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 |
- |
- |
- |
- |
- |
- |
2017-11-06 |
2017-11-06 |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
IS13 |
AL |
- |
- |
- |
- |
- |
- |
2017-11-06 |
2017-11-06 |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
IS14 |
AL |
- |
- |
- |
- |
- |
- |
- |
2017-11-08 |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
IS15 |
AL |
- |
- |
- |
- |
- |
- |
- |
2017-11-22 |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
SR8 |
AL |
- |
- |
- |
- |
- |
- |
- |
2017-11-06 |
|
|
|
|
|
|
|
|
2017-11-08 |
|
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
SR9 |
AL |
- |
- |
- |
- |
- |
- |
- |
2017-11-08 |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
SR10A |
AL |
- |
- |
- |
- |
- |
- |
- |
2017-11-06 |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
Total AL
Exceedances: |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
8 |
|
Total LL
Exceedances: |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Notes: |
|||||||||
(a) AL = Action Level; LL = Limit Level |
One (1) Limit Level exceedance was observed for the
quarterly dolphin monitoring data between September and November 2017, 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 light pollution at Tuen Mun Pier was
referred by IEC on 25 October 2017.
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; ·
Phase 2 Surcharge Removal – Portion N-A; ·
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 Enhancement works – Portion N-C |
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 Sixteenth Quarterly EM&A Report presents the
findings of the EM&A activities undertaken during the period from 1
September 2017 to 30 November 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. Fourteen (14)
Action Level exceedances and two (2) Limit Level exceedance of 1-hour TSP were
recorded in the air quality monitoring of this reporting period. One (1) Action Level exceedances of 24-hour
TSP was recorded.
Ten (10) Action Level exceedances of Suspended Solids (SS) were
recorded in the water quality monitoring of this reporting period.
A total of 13 groups of 50 Chinese
White Dolphins sightings were recorded during the six sets of surveys
in this reporting quarter. All thirteen dolphin
sightings were made
during on-effort search, and twelve of the thirteen on-effort dolphin sightings
were made on primary lines. Whilst one limit level exceedance was
observed for the quarterly dolphin monitoring data between September and November 2017, 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.