table of Contents
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 Post Translocation Coral
Monitoring
2.5 EM&A Site Inspection
2.6 Waste Management Status
2.7 Environmental Licenses and
Permits
2.8 Implementation Status of
Environmental Mitigation Measures
2.9 Summary of Exceedances of the
Environmental Quality Performance Limit
2.10 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
Appendix
A |
|
Appendix
B |
|
Appendix
C |
Environmental Mitigation
And Enhancement Measure Implementation Schedules (EMIS) |
Appendix
D |
|
Appendix
E |
|
Appendix
F |
|
Appendix
G |
|
Appendix
H |
|
Appendix
I |
|
Appendix
J |
|
Appendix
K |
Under Contract No. HY/2012/08,
Dragages ¡V 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 ¡V 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. ENVIRON Hong Kong Ltd. was employed by HyD as the Independent Environmental Checker (IEC) and
Environmental Project Office (ENPO).
Another application for variation of environmental
permit (VEP) (EP-354/2009/B) was
granted on 28 January 2014.
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 Second Quarterly EM&A report presenting the EM&A works carried
out during the period from 1 March 2014 to 31 May 2014 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:
Marine-based Works
¡P Dredging
at Portion N-C
¡P Reclamation
Filling at Portion N-A
¡P Construction
of Vertical Seawall and Sloping Seawall at Portion N-B
¡P Marine
Sheet Piling for Box Culvert extension at Portion N-A
Land-based Works
Site WA 18
¡P Site
office structural works
Portion N6
¡P CLP
Substation structure works
¡P CLP
Substation E&M works
¡P Bored
Piling
¡P Pile
Cap Construction
Reclamation
Area ¡V Portion N-A
¡P Construction
of temporary access
¡P Diaphragm
Wall Construction
A summary of
monitoring and audit activities conducted in the reporting period is listed
below:
24-hour TSP Monitoring 16
sessions
1-hour TSP Monitoring 16
sessions
Impact Water
Quality Monitoring 39
sessions
Impact Dolphin
Monitoring 6
sessions
Joint
Environmental Site Inspection 13
sessions
Daily
marine mammal exclusion zone monitoring was undertaken during the period of
dredging works. No sighting of the
Indo-Pacific humpback dolphin Sousa chinensis was observed during the exclusion zone
monitoring.
Summary of
Breaches of Action/Limit Levels
Breaches of Action and Limit Levels for Air Quality
Three Action Level
and no Limit Level exceedances for 1-hr TSP; no Action Level or Limit Level
exceedances for 24-hr TSP were recorded from the air quality monitoring in this
reporting period. The exceedances
were considered to be due to the sporadic events from cumulative anthropogenic
activities in this area of Hong Kong.
Breaches of Action and Limit Levels for Water Quality
One Action
Level and one Limit Level exceedances for depth-averaged suspended solids (SS)
were recorded in this reporting period.
The exceedances were considered to be the increased input of turbid
water from the Pearl River due to heavy rainfall.
Dolphin Monitoring
Whilst two
Action Level exceedances were observed for the quarterly dolphin monitoring
data between March 2014 and May 2014, 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.
The exceedances are
considered to be the natural variation of Chinese White Dolphin ranging pattern.
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
potential complaint/ enquiry case was notified by the Contractor on 25 April
2014. The investigation findings
showed that the case was considered not related to the works under this
Contract and is thus invalid.
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:
Marine-based works
¡P Dredging
¡P Reclamation
Filling
¡P Vertical
seawall construction
¡P Sloping
seawall construction
¡P Marine
sheet piling for box culvert extension
¡P Predrilling
for box culvert foundation
Land-based works
Portion N6
¡P CLP
substation utilities works
¡P Bored
Piling
Reclamation
Area ¡V Portion N-A
¡P Diaphragm
Wall Construction
¡P Construction
of temporary access; and,
¡P Pile
Cap Construction
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 water quality, marine ecology and waste management.
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 ¡V
Zhuhai ¡V Macao Bridge (HZMB). In
order to cope with the anticipated traffic demand, two new road sections
between NWNT and North Lantau ¡V Tuen Mun ¡V 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-145/2009), 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-354/2009A) was issued on 8 December 2010. Another application for VEP
(EP-354/2009/B) was granted on 28 January 2014.
Under
Contract No. HY/2012/08,
Dragages ¡V 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. 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
16/HZMB |
Kenneth Lee |
2762
4996 |
3188
6614 |
SOR (AECOM Asia
Company Limited) |
Chief
Resident Engineer |
Edwin
Ching Andrew
Westmoreland |
2450
3111 2450
3511 |
2450
3099 2450
3099 |
ENPO / IEC (ENVIRON
Hong Kong Ltd.) |
ENPO Leader |
Y.H. Hui |
3465 2888 |
3465 2899 |
IEC |
F. C. Tsang |
3465 2828 |
3465 2899 |
|
Contractor (Dragages ¡V
Bouygues Joint Venture) |
Environmental
Manager |
C.F. Kwong |
2293
7322 |
2670
2798 |
Environmental
Officer 24-hour
complaint hotline |
Bryan Lee Rachel Lam |
2293
7323 2293
7342 |
2670
2798 |
|
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 |
Marine-based Works |
¡P
Dredging at Portion N-C |
¡P
Reclamation Filling at Portion N-A |
¡P
Construction of Vertical Seawall and Sloping Seawall
at Portion N-B |
¡P
Marine Sheet Piling for Box Culvert extension at
Portion N-A |
Land-based Works |
Site
WA 18 |
¡P
Site office structural works |
Portion
N6 |
¡P
CLP Substation structure works |
¡P
CLP Substation E&M works |
¡P
Bored Piling |
¡P
Pile Cap Construction |
Reclamation
Area ¡V Portion N-A |
¡P
Construction of temporary access |
¡P
Diaphragm Wall Construction |
Figure
1.2 Locations
of Construction Activities ¡V March 2014 to May 2014
|
|
|
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/A and EP-354/2009/B, 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.
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 |
Location |
Description |
Parameters & Frequency |
Monitoring Dates |
ASR1 |
Tuen Mun Fireboat Station |
Office |
1-hour Total Suspended Particulates (1-hour
TSP, µg/m3), 3 times per day in every 6 days
24-hour Total Suspended Particulates
(24-hour TSP, µg/m3), daily for 24-hour in every 6 days |
6, 12, 18, 24 and 28 March 2014; 3, 9, 15, 18, 24 and 30 April 2014; 5, 10, 16, 22 and 28 May 2014 |
ASR5 |
Pillar
Point Fire Station |
Office |
||
AQMS1 |
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 |
MetPak (Model: MetPak II (S/N: 13130002) |
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 [JY1] and
detailed impact air quality monitoring data were reported in the Fifth to Seventh 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) |
March 2014
to May 2014 |
ASR 1 |
160 |
62
¡V 391 |
331 |
500 |
ASR 5 |
192 |
82
¡V 402 |
340 |
500 |
|
AQMS1 |
144 |
56
¡V 299 |
335 |
500 |
|
ASR6 |
145 |
52
¡V 318 |
338 |
500 |
|
ASR10 |
120 |
59
¡V 381 |
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) |
March 2014
to May 2014 |
ASR 1 |
90 |
46
¡V 135 |
213 |
260 |
ASR 5 |
93 |
55
¡V 119 |
238 |
260 |
|
AQMS1 |
75 |
43
¡V 129 |
213 |
260 |
|
ASR6 |
74 |
44
¡V 107 |
238 |
260 |
|
ASR10 |
69 |
40
¡V 108 |
214 |
260 |
In this
reporting period, a total of sixteen monitoring events were undertaken in which
three Action Level exceedances and no Limit Level exceedances for 1-hr TSP; no
Action Level exceedances or Limit Level exceedances for 24-hr TSP were recorded.
Summary of Exceedances for Air
Quality Impact Monitoring in this Reporting Quarter is detailed in Table 2.15.
The baseline
water quality monitoring undertaken by the Hong Kong ¡V Zhuhai ¡V Macao Bridge
Hong Kong Projects (HKZMB) between 6 and 31 October 2011 has included all
monitoring stations for the Project.
Thus, the baseline monitoring results and Action/Limit Levels presented
in HKZMB Baseline Monitoring Report ([2]) are
adopted for this Project.
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(¢XC)
pH(pH unit)
Turbidity (NTU)
Water depth (m)
Salinity (ppt)
DO (mg/L and % of saturation) ¡P
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 |
Qty. |
Water Sampler |
Kahlsico Water-Bottle Model 135DW 150 |
1 |
Dissolved Oxygen Meter |
YSI Pro 2030 |
1 |
pH Meter |
HANNA HI 8314 |
1 |
Turbidity Meter |
HACH 2100Q |
1 |
Monitoring Position Equipment |
¡§Magellan¡¨ Handheld GPS Model eXplorist GC |
4 |
DGPS Koden KGP913MK2 (1) |
1 |
The Action and
Limit Levels of the water quality monitoring is provided in Appendix D. The Event and Action plan is presented in
Appendix I.
The schedules
for water quality monitoring in the reporting period are provided in Appendix E.
During this
reporting period, major marine dredging activities included dredging at Portions
N-B and N-C and reclamation filling at Portion N-A. A closed grab dredger was used and silt
curtains (cage-type and single floating type) were deployed during dredging
works in accordance with the EP.
The level of dredging activities was within the working rate described
in the EP and the approved EIA Report.
In addition, reclamation filling was undertaken between the 200 m of
leading seawalls using filling materials specified in the EP and the approved
EIA Report with a single layer silt curtain being deployed as a precautionary
measure to reduce dispersion of suspended solids. It is useful to note that heavy marine
traffic (not associated with the Project) was commonly observed nearby the
Project site and its vicinity.
Impact water
quality monitoring was conducted at all designated monitoring stations in the
reporting period
under favourable weather conditions. Monitoring results are presented
graphically in Appendix G and
detailed impact water quality monitoring data were reported in the Fifth to Seventh Monthly EM&A Report.
In this
reporting period, a total of thirty-nine monitoring events were undertaken in
which one Action Level exceedance and one Limit Level exceedances for
depth-averaged SS were recorded. Summary of Exceedances for Water
Quality Impact Monitoring in this Reporting Quarter is detailed in Table 2.17.
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 summarises 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 2.3. 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 |
814577 |
13 |
Start Point |
816506 |
819480 |
1 |
End Point |
804671 |
831404 |
13 |
End Point |
816506 |
824859 |
2 |
Start Point |
805475 |
815457 |
14 |
Start Point |
817537 |
820220 |
2 |
End Point |
805477 |
826654 |
14 |
End Point |
817537 |
824613 |
3 |
Start Point |
806464 |
819435 |
15 |
Start Point |
818568 |
820735 |
3 |
End Point |
806464 |
822911 |
15 |
End Point |
818568 |
824433 |
4 |
Start Point |
807518 |
819771 |
16 |
Start Point |
819532 |
821420 |
4 |
End Point |
807518 |
829230 |
16 |
End Point |
819532 |
824209 |
5 |
Start Point |
808504 |
820220 |
17 |
Start Point |
820451 |
822125 |
5 |
End Point |
808504 |
828602 |
17 |
End Point |
820451 |
823671 |
6 |
Start Point |
809490 |
820466 |
18 |
Start Point |
821504 |
822371 |
6 |
End Point |
809490 |
825352 |
18 |
End Point |
821504 |
823761 |
7 |
Start Point |
810499 |
820690 |
19 |
Start Point |
822513 |
823268 |
7 |
End Point |
810499 |
824613 |
19 |
End Point |
822513 |
824321 |
8 |
Start Point |
811508 |
820847 |
20 |
Start Point |
823477 |
823402 |
8 |
End Point |
811508 |
824254 |
20 |
End Point |
823477 |
824613 |
9 |
Start Point |
812516 |
820892 |
21 |
Start Point |
805476 |
827081 |
9 |
End Point |
812516 |
824254 |
21 |
End Point |
805476 |
830562 |
10 |
Start Point |
813525 |
820872 |
22 |
Start Point |
806464 |
824033 |
10 |
End Point |
813525 |
824657 |
22 |
End Point |
806464 |
829598 |
11 |
Start Point |
814556 |
818449 |
23 |
Start Point |
814559 |
821739 |
11 |
End Point |
814556 |
820992 |
23 |
End Point |
814559 |
824768 |
12 |
Start Point |
815542 |
818807 |
|
|
|
|
12 |
End Point |
815542 |
824882 |
|
|
|
|
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 891.87
km of survey effort was collected, with 87.4% 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, 350.40 km and 541.47 km of survey effort were collected from NEL and NWL
survey areas, respectively. The
total survey effort conducted on primary and secondary lines were 642.67 km and
249.20 km, respectively. The survey
efforts are summarized in Appendix H.
A total of 31 groups of 103 Chinese
White Dolphin sightings were recorded
during the six sets
of surveys in this reporting quarter.
All except one sighting were made during on-effort search. Twenty-five on-effort sightings were
made on primary lines, while five other on-effort sightings were made on
secondary lines. During this
reporting quarter, all
dolphin groups were sighted in NWL, while none was sighted in NEL.
For the
detailed comparison of dolphin occurrence and usage of NEL and NWL survey area
between the impact phase and baseline phase monitoring, only the quarterly data
of March 2014 to May 2014 from the impact phase monitoring was used in the
present report to tally with the three-month period of baseline monitoring
(September 2011 to November 2011).
As the baseline monitoring period was in the autumn
season (September 2011 to November 2011) while the present monitoring period
was in the spring season (March 2014 to May 2014), a direct comparison in
dolphin distribution between the two quarterly periods of spring months in 2013
and 2014 was also made to avoid the potential bias in seasonal variation.[JY2]
Between the two spring periods, none of the
dolphin sightings was made in NEL in spring 2014, while there were two
sightings made in spring 2013.
Moreover, more dolphin sightings were made in the middle portion of
North Lantau waters and to the west of the airport platform in spring 2013 than
in spring 2014.
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: Mar
5th/11th |
0.0 |
0.0 |
Set 2: Mar
17th/25th |
0.0 |
0.0 |
|
Set 3: Apr
4th/14th |
0.0 |
0.0 |
|
Set 4: Apr
16th/24th |
0.0 |
0.0 |
|
Set 5: May
2nd/19th |
0.0 |
0.0 |
|
Set 6: May21st/26th |
0.0 |
0.0 |
|
NWL |
Set 1: Mar
5th/11th |
6.43 |
23.57 |
Set 2: Mar
17th/25th |
13.15 |
24.83 |
|
Set 3: Apr
4th/14th |
4.89 |
26.88 |
|
Set 4: Apr
16th/24th |
4.94 |
11.54 |
|
Set 5: May
2nd/19th |
5.47 |
18.24 |
|
Set 6: May21st/26th |
4.18 |
9.75 |
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 Monthly
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) |
||
March 2014 ¡V May 2014 |
September 2011 ¡V November 2011 |
March 2014 ¡V May 2014[JY3] |
September 2011 ¡V November 2011 |
|
Northeast Lantau |
0.0 |
6.00 ¡Ó 5.05 |
0.0 |
22.19 ¡Ó 26.81 |
Northwest Lantau |
6.51 ¡Ó 3.34 |
9.85 ¡Ó 5.85 |
19.14 ¡Ó 7.19 |
44.66 ¡Ó 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 - 13 individuals per group in North Lantau region during March 2014 to May
2014. 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 |
|
March 2014 ¡V May 2014 |
September 2011 ¡V November 2011 |
|
Overall |
3.32 ¡Ó 2.87 |
3.72 ¡Ó 3.13 |
Northeast Lantau |
0.0 |
3.18 ¡Ó 2.16 |
Northwest Lantau |
3.32 ¡Ó 2.87 |
3.92 ¡Ó 3.40 |
During this reporting
quarter of dolphin monitoring, 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 250 m marine
mammal exclusion zone monitoring was undertaken during the period of dredging
activities under this Contract. No sighting of the Indo-Pacific humpback dolphin
(i.e. Chinese White Dolphin) Sousa chinensis was recorded during the exclusion zone
monitoring.
The second
quarterly Coral Post-Translocation Monitoring was conducted on 16 April 2014
and the results were provided in the Second
Quarterly Post-Translocation Coral Monitoring Report. The findings indicated that the Action
or Limit Levels for coral monitoring were not exceeded as increase in
percentage of partial mortality was not detected for both the tagged translocated and natural coral colonies when comparing to
the pre-translocation dataset.
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 4, 11, 19 and 26 March;
1, 8, 16, 22 and 30 April; 7, 13, 21, 27 May 2014.
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 |
4 March 2014 |
Barge ¡V GD2 ¡P
Sediment outflow was observed outside the cage-type
silt curtain. Cage-type silt curtain should be maintained regularly. ¡P
Acoustic decoupling measures should be placed
underneath all generators. |
Barge ¡V GD2 ¡P
The Contractor was reminded to regularly maintain
the cage-type silt curtain to prevent sediment out flow. ¡P
The Contractor was reminded to check for all
generators if the acoustic decoupling measures have been placed underneath
all generators. |
Barge ¡V Wing
Go ¡P
Excess sandy materials should be regularly cleaned
from decks and exposed fittings of the barge. Works Area -
WA23 ¡P
Sandy materials should be regularly cleared to avoid
runoff. |
Barge ¡V Wing
Go ¡P
The Contractor was reminded to regularly clear
excess sandy materials from decks and exposed fittings of the barge. Works Area -
WA23 ¡P
The Contractor was reminded to clear the sandy
materials more often to avoid runoff. |
|
11 March
2014 |
Barge ¡V GD12
and GD2 |
Barge ¡V GD12
and GD2 |
¡P
Acoustic decoupling measures should be placed
underneath all generators. |
¡P
The Contractor was reminded to place the proper
isolation material underneath all generators. |
|
Barge ¡V GD2 |
Barge ¡V GD2 |
|
¡P
Oily water and surface runoff was observed on the
deck.
¡P
Cage-type silt curtain should be maintained
regularly throughout the dredging works. |
¡P
The Contractor was reminded to clean up the oily
water as chemical waste immediately and to check for oil spill
regularly.
¡P
The Contractor was reminded to fix the cage-type
silt curtain before dredging works commence. |
|
19 March
2014 |
Barge ¡V CA11
and GD2 ¡P
Excess material should be regularly cleaned from
decks and the side of the barge. ¡P
Cage-type silt curtain should be maintained
regularly throughout the dredging works. Works Area -
Portion N6 ¡P
C&D waste material sorting area should be set up
properly. |
Barge ¡V CA11
and GD2 ¡P
The Contractor was reminded to do regular cleaning
of excess material on the side decks of the barge. ¡P
The Contractor was reminded to perform regular maintanence on the cage-type silt curtain. Works Area -
Portion N6 ¡P
The Contractor was reminded to set up a proper
C&D waste material sorting area. |
26 March
2014 |
Marine Works Area - Portion N-A and
N-B ¡P
The Contractor was reminded to tie the
floating type silt curtain. Works Area - Portion N6 ¡P
Stagnant water should be cleared. ¡P
Water spraying should be applied during ground
breaking works to control dust. |
Marine Works Area - Portion N-A and
N-B ¡P
The Contractor was reminded to regularly
check and maintain the floating type silt curtain. |
Works Area - Portion N6 ¡P
The Contractor was reminded to clear the
stagnant water. ¡P
The Contractor was reminded to apply water
spraying during ground breaking works and provide adequate water spraying
throughout the day to avoid dust generation. |
||
1 April 2014 |
Barge ¡V Tai
Hip 2 ¡P
Chemical
containers on the barge was observed without drip tray. ¡P
Oil spillage was observed in the water adjacent to
the barge. Works Area -
Portion N6 ¡P
Bunds should be provided to avoid sediment runoff
into the sea. |
Barge ¡V Tai
Hip 2 ¡P
The Contractor was reminded to provide drip tray for
the chemical containers to avoid chemical spillage. ¡P
The Contractor was reminded to clean up the oil
spill as chemical waste. Works Area -
Portion N6 ¡P
The Contractor was reminded to provide bunds. |
8 April 2014 |
Barge ¡V GBFC ¡P
Chemical containers and oil drum on the barge were
observed without drip tray. Reclamation
Area ¡V Zone E ¡P
Sandy materials were observed on the seawall block
next to the barge. Barge ¡V
Leader F53 ¡P
Acoustic decoupling measures should be placed
underneath all generators. |
Barge ¡V GBFC ¡P
The Contractor was reminded to provide drip tray for
chemical containers and oil drum on the barge. Reclamation
Area ¡V Zone E ¡P
The Contractor was reminded to regularly clear the
sandy materials on the seawall block. Barge ¡V
Leader F53 ¡P
The Contractor was reminded to check all generators
for acoustic decoupling measures on newly arrived vessels. |
16 April
2014 |
Reclamation
Area ¡V Zone E ¡P
Drip tray should be provided to the chemical
containers. |
Reclamation
Area ¡V Zone E ¡P
The Contractor was reminded to provide drip tray for
the chemical containers. |
22 April
2014 |
Barge ¡V CA1 ¡P
Acoustic decoupling
measures should be properly installed underneath the generator. Barge ¡V Wing Ko ¡P
Excess materials were
observed on the deck of the barge and on top of seawall blocks. Works Area - Portion N6 ¡P
Excess
materials were observed on the edge of the site area. |
Barge ¡V CA1 ¡P
The Contractor was
reminded to check all the generators for proper implementation of acoustic
decoupling measures. Barge ¡V Wing Ko ¡P
Excess materials should
be cleared regularly on the deck of the barge and on top of seawall blocks. Works Area - Portion N6 ¡P
Excess
materials should be cleared regularly on the edge of the site area to avoid
runoff. |
30 April
2014 |
Works Area -
Portion N6 ¡P
Silty
water was observed near the drilling machine. ¡P
Excess materials were observed on the edge
of the site area. |
Works Area -
Portion N6 ¡P
The Contractor was reminded to clear the silty water. ¡P
The Contractor was reminded to clear the
excess materials to avoid runoff. |
7 May 2014 |
Barge ¡V CA1 ¡P
Cage-type silt curtain
should be properly installed. ¡P
Sediment flow was
observed behind hopper barge. Works Area - Portion N6 ¡P
Drip tray
should be provided to the chemical containers. |
Barge ¡V CA1 ¡P
The Contractor was
reminded to properly install the cage-type silt curtain before dredging
commences. ¡P
The Contractor was
reminded to maintain the silt curtain behind hopper barge. Works Area - Portion N6 ¡P
The
Contractor was reminded to provide drip tray to the chemical containers. |
13 May 2014 |
Reclamation
Area - Portion N-A ¡P
Drip tray should be provided for the generator once
in use.
Marine Works
Area - Portion N-A ¡P
Muddy plume was observed near the seawall.
|
Reclamation
Area - Portion N-A ¡P
The Contractor was reminded to provide drip tray for
the generator.
Marine Works
Area - Portion N-A ¡P
The Contractor was reminded to provide a layer of
geotextile next to the seawall to prevent muddy plume. |
21 May 2014 |
Reclamation
Area - Portion N-A ¡P
Silt curtain should be maintained regularly.
¡P
Mechanical equipment should be covered during
rainstorm to avoid chemical spillage. |
Reclamation
Area - Portion N-A ¡P
The Contractor was reminded to properly tie the silt
curtain. ¡P
The Contractor was reminded to cover the mechanical
equipment during rainstorm. |
27 May 2014 |
Works Area ¡V
Portion N6 ¡P
Water inside drip tray should be cleared. Reclamation
Area - Portion N-A ¡P
EP should be displayed at the site entrance.
|
Works Area ¡V
Portion N6 ¡P
The Contractor was reminded to regularly check the
capacity of drip trays. Reclamation
Area - Portion N-A ¡P
The Contractor was reminded to display EP at the
site entrance. |
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), imported fill, recyclable materials, and marine
sediments. 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) |
Imported Fill (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 |
|||||||
March 2014 |
105 |
516,400 |
0 |
36 |
0 |
0 |
37,300 |
40,450 |
April 2014 |
22 |
467,867 |
0 |
26 |
160 |
0 |
28,600 |
15,400 |
May 2014 |
1,016 |
516,368 |
0 |
42 |
0 |
0 |
18,700 |
29,150 |
Total |
1,143 |
1,500,635[JY4] |
0 |
104 |
160 |
0 |
84,600 |
85,000 |
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/B |
28
January 2014 |
Throughout
the Contract |
HyD |
Application for VEP
on 20 January 2014 to replace EP-354/2009/A |
Construction Dust Notification |
363510 |
19 August
2013 |
Throughout
the Contract |
DBJV |
- |
Chemical Waste Registration |
5213-422-D2516-01 |
10
September 2013 |
Throughout
the Contract |
DBJV |
- |
Construction Waste Disposal Account |
7018108 |
19 August
2013 |
Throughout
the Contract |
DBJV |
Waste disposal in Contract HY/2012/08 |
Waste Water Discharge License |
WT00017707-2013 |
18 November
2013 |
30 November
2018 |
DBJV |
For works in site WA18 |
Waste Water Discharge License |
WT00018433-2014 |
6 March
2014 |
31 March
2019 |
DBJV |
For works in site Portion N6 |
Construction Noise Permit |
GW-RW0223-14 |
29 March 2014 |
28 September 2014 |
DBJV |
For works in site Portion N6 |
Construction Noise Permit |
GW-RW0691-13 |
15 October
2013 |
14 April
2014 |
DBJV |
For Dredging and Reclamation Works |
Construction Noise Permit |
GW-RW0095-14 |
10 February 2014 |
9 August 2014 |
DBJV |
For Dredging and Reclamation Works |
Construction Noise Permit |
GW-RW0234-14 |
29 March 2014 |
28 September 2014 |
DBJV |
For Dredging and Reclamation Works |
Construction Noise Permit |
GW-RW0822-13 |
14 November
2013 |
10 May 2014 |
DBJV |
For works in site WA18 |
Construction Noise Permit |
GW-RS0814-13 |
15 November
2013 |
10 May 2014 |
DBJV |
For works in site WA23 |
Construction Noise Permit |
GW-RS0362-14 |
11
May 2014 |
10 November 2014 |
DBJV |
For works in site WA23 |
Construction Noise Permit |
GW-RW0077-14 |
17 February 2014 |
16 August 2014 |
DBJV |
For Portion N6 |
Marine Dumping Permit |
EP/MD/14-072 |
1 November
2013 |
30 April
2014 |
DBJV |
For Type 1 |
Marine Dumping Permit |
EP/MD/14-140 |
1 March
2014 |
31 March
2014 |
DBJV |
For Type 1 (dedicated site) and Type
2 |
Marine Dumping Permit |
EP/MD/14-072 |
3 April
2014 |
30 April
2014 |
DBJV |
For Type 1 (dedicated site) and Type
2 |
Marine Dumping Permit |
EP/MD/15-007 |
1 May 2014 |
31 May 2014 |
DBJV |
For Type 1 (dedicated site) and Type
2 |
Notes: |
|
|
|
|
|
HyD = Highways
Department DBJV = Dragages
¡V 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 sixteen monitoring events were undertaken
in which three Action Level exceedances and no Limit Level exceedances for 1-hr
TSP; no Action Level exceedances or Limit Level exceedances for 24-hr TSP were
recorded. (Table 2.15). Upon further investigation, the recorded
exceedances in air quality monitoring were considered to be sporadic events of
cumulative anthropogenic activities in this area of Hong Kong. Detailed investigation findings were
presented in Appendix L of the Fifth to Sixth Monthly EM&A Report.
Table 2.15 Summary
of Exceedances for Air Quality Impact Monitoring in this Reporting Quarter
Station |
Exceedance Level |
1-hr TSP |
24-hr TSP |
Number of Exceedances |
|
1-hr TSP |
24-hr TSP |
||||
AQMS1 |
Action Level |
- |
- |
0 |
0 |
Limit Level |
- |
- |
0 |
0 |
|
ASR1 |
Action Level |
2014-03-24 |
- |
1 |
0 |
Limit Level |
- |
- |
0 |
0 |
|
ASR5 |
Action Level |
2014-03-24 |
- |
1 |
0 |
Limit Level |
- |
- |
0 |
0 |
|
ASR6 |
Action Level |
- |
- |
0 |
0 |
Limit Level |
- |
- |
0 |
0 |
|
ASR10 |
Action Level |
2014-04-03 |
- |
1 |
0 |
Limit Level |
- |
- |
0 |
0 |
|
Total number of Action level Exceedances: |
3 |
0 |
|||
Total number of Limit level Exceedances: |
0 |
0 |
For marine
water quality impact monitoring, a total of thirty-nine monitoring events were
undertaken in which one Action Level exceedance and one Limit Level exceedances
for depth-averaged SS were recorded (Table
2.17). The exceedances
were considered to be the increased input of turbid water from the Pearl River
due to heavy rainfall upon further investigation. Detailed investigation findings are
presented in Appendix L of the Fifth Monthly EM&A Report. 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), thus
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 (March 2014 to May
2014) |
|||
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
Mid-ebb |
Mid-flood |
|
CS4 |
10.2 |
9.0 |
13.3 |
11.7 |
4.3 |
4.2 |
CS6 |
10.9 |
11.7 |
14.1 |
15.2 |
4.2 |
4.3 |
IS12 |
9.2 |
9.5 |
12.0 |
12.3 |
4.6 |
5.0 |
IS13 |
10.0 |
10.5 |
13.0 |
13.7 |
4.4 |
4.5 |
IS14 |
10.4 |
9.7 |
13.5 |
12.6 |
4.4 |
4.8 |
IS15 |
9.6 |
11.0 |
12.5 |
14.2 |
4.3 |
4.6 |
SR10A |
10.3 |
10.2 |
13.3 |
13.3 |
4.3 |
4.6 |
SR8 |
10.1 |
11.3 |
13.1 |
14.7 |
4.2 |
4.4 |
SR9 |
8.8 |
9.9 |
11.4 |
12.8 |
4.4 |
4.4 |
Grand Total |
10.0 |
10.3 |
13.0 |
13.4 |
4.3 |
4.5 |
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 |
- |
- |
- |
- |
- |
- |
- |
2014-03-31 |
|
IS13 |
AL |
- |
- |
- |
- |
- |
- |
- |
- |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
IS14 |
AL |
- |
- |
- |
- |
- |
- |
- |
2014-03-31 |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
IS15 |
AL |
- |
- |
- |
- |
- |
- |
- |
- |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
SR8 |
AL |
- |
- |
- |
- |
- |
- |
- |
- |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
SR9 |
AL |
- |
- |
- |
- |
- |
- |
- |
- |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
SR10 |
AL |
- |
- |
- |
- |
- |
- |
- |
- |
LL |
- |
- |
- |
- |
- |
- |
- |
- |
|
Total AL Exceedances: |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
|
Total LL Exceedances: |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
|
Notes: |
|||||||||
(a) AL =
Action Level; LL = Limit Level |
Two Action
Level exccedances of impact dolphin monitoring were
recorded in this reporting quarter.
Following the review of monitoring data and marine works details in
accordance with the procedures stipulated in the Event and Action Plan of the Updated
EM&A Manual, the recorded exceedances were considered to be due to natural
variation of dolphin ranging pattern.
Detailed investigation findings are presented in Appendix J.
Cumulative
statistics are provided in Appendix J.
The
Environmental Complaint Handling Procedure is provided in Figure 2.4.
No
non-compliance event was recorded during the reporting period.
One
potential complaint/ enquiry case was notified by the Contractor on 25 April
2014. The investigation findings
showed that the case was considered not related to the works under this
Contract and is thus invalid. Detailed
investigation findings are provided in Appendix
L of the Seventh EM&A
Monthly Report.
No summons/
prosecution was received during the 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 |
Marine-based Works |
¡P
Dredging |
¡P
Reclamation Filling |
¡P
Vertical Seawall construction |
¡P
Sloping Seawall construction |
¡P
Marine Sheet Piling for Box Culvert extension |
¡P
Predrilling
for Box culvert Foundation |
Land-based Works |
Works Area -
Portion N6 |
¡P
CLP Substation utilities works |
¡P
Bored
Piling Reclamation
Area ¡V Portion N-A ¡P
Construction
of temporary access ¡P
Pile Cap Construction ¡P
Diaphragm
Wall Construction |
Potential
environmental impacts arising from the above upcoming construction activities
are mainly associated with dust, marine water quality, marine ecology and waste
management issues.
Impact
monitoring for air quality, marine water quality and marine ecology (include
dolphin monitoring and post-translocation coral monitoring) are scheduled to
continue for the next reporting period.
This Second Quarterly
EM&A Report presents the findings of the EM&A activities undertaken
during the period from 1 March 2014 to 31 May 2014, in accordance with the
Updated EM&A Manual and the requirements of EP-354/2009/B.
Air quality
(including 1-hour TSP and 24-hour TSP), marine water quality and dolphin monitoring
were carried out in the reporting period.
Three Action Level and no Limit Level exceedances
for 1-hr TSP, and no Action Level or Limit Level exceedances for 24-hr TSP were
recorded during the reporting period.
One Action Level and one Limit Level exceedances for depth-averaged SS
were recorded in marine water quality impact monitoring during the reporting period.
The review of monitoring data
suggested that no unacceptable impact was resulting from the construction
activities under this Contract in the reporting period. Nevertheless, the Contractor was
reminded to ensure that all dust mitigation measures are provided at the
construction sites and the proper deployment of cage-type silt curtains at the
dredging site.
A total of 31 groups of 103 Chinese
White Dolphin sightings were recorded
during the six sets
of surveys from March 2014 to May 2014. Whilst two Action Level exceedances were
recorded for the quarterly dolphin monitoring data between March and May 2014,
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.
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.
One
potential complaint/ enquiry case was notified by the Contractor on 25 April
2014. The investigation findings
showed that the case was considered not related to the works under this Contract
and is thus invalid.
No summons/
prosecution was received 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.