Contract
No. HY/2011/03
Hong Kong-Zhuhai-Macao Bridge Hong Kong Link
Road
Section between Scenic Hill and Hong Kong Boundary Crossing
Facilities
Monthly EM&A Report No.48 (September 2016)
16 October 2016
Revision 1
Main Contractor Designer
Contents
Executive Summary
1.4 Construction Works Undertaken During the Reporting Month
2....... Air Quality Monitoring
2.4 Monitoring Parameters, Frequency and Duration
2.6 Monitoring Schedule for the Reporting Month
3.4 Monitoring Parameters, Frequency and Duration
3.6 Monitoring Schedule for the Reporting Month
4....... Water Quality Monitoring
4.3 Monitoring Parameters, Frequency and Duration
4.6 Monitoring Schedule for the Reporting Month
6.1 Sedimentation Rate Monitoring
6.3 Mudflat Ecology Monitoring Methodology
6.4 Event and Action Plan for Mudflat Monitoring
6.5 Mudflat Ecology Monitoring Results and Conclusion
7....... Environmental Site Inspection and Audit
7.2 Advice on the Solid and Liquid Waste Management Status
7.3 Environmental Licenses and Permits
7.4 Implementation Status of Environmental Mitigation Measures
7.5 Summary of Exceedances of the Environmental Quality Performance
Limit
7.6 Summary of Complaints, Notification of Summons and Successful
Prosecution
8.1 Construction Programme for the Coming Months
8.2 Environmental Monitoring Schedule for the Coming Month
Figures
Figure 1.1 Location
of the Site
Figure 2.1 Environmental
Monitoring Stations
Figure 6.1 Mudflat
Survey Area
Appendices
Appendix A Environmental
Management Structure
Appendix B Construction
Programme
Appendix C Calibration
Certificates
Appendix
D Monitoring
Schedule
Appendix E Monitoring
Data and Graphical Plots
Appendix F Event and
Action Plan
Appendix H Dolphin Monitoring
Results
Appendix I Mudflat
Monitoring Results
Appendix K Cumulative
Statistics on Complaints
Appendix L Environmental
Licenses and Permits
Appendix M Implementation Schedule
of Environmental Mitigation Measures
Executive Summary
The Hong Kong-Zhuhai-Macao
Bridge (HZMB) Hong Kong Link Road (HKLR) serves to connect the HZMB Main Bridge
at the Hong Kong Special Administrative Region (HKSAR) Boundary and the HZMB
Hong Kong Boundary Crossing Facilities (HKBCF) located at the north eastern
waters of the Hong Kong International Airport (HKIA).
The HKLR project has been
separated into two contracts. They are Contract No. HY/2011/03 Hong
Kong-Zhuhai-Macao Bridge Hong Kong Link Road-Section between Scenic Hill and
Hong Kong Boundary Crossing Facilities (hereafter referred to as the Contract)
and Contract No. HY/2011/09 Hong Kong-Zhuhai-Macao Bridge Hong Kong Link
Road-Section between HKSAR Boundary and Scenic Hill.
China State Construction
Engineering (Hong Kong) Ltd. was awarded by Highways Department as the
Contractor to undertake the construction works of Contract No. HY/2011/03. The main works of the Contract include land
tunnel at Scenic Hill, tunnel underneath Airport Road and Airport Express Line,
reclamation and tunnel to the east coast of the Airport Island, at-grade road
connecting to the HKBCF and highway works of the HKBCF within the Airport
Island and in the vicinity of the HKLR reclamation. The Contract is part of the HKLR Project
and HKBCF Project, these projects are considered to be ¡§Designated Projects¡¨,
under Schedule 2 of the Environmental Impact Assessment (EIA) Ordinance (Cap
499) and Environmental Impact Assessment (EIA) Reports (Register No.
AEIAR-144/2009 and AEIAR-145/2009) were prepared for the Project. The current Environmental Permit (EP)
EP-352/2009/D for HKLR and EP-353/2009/K for HKBCF were issued on 22 December
2014 and 11 April 2016, respectively. These documents are available through the
EIA Ordinance Register. The construction phase of Contract was
commenced on 17 October 2012.
BMT Asia Pacific Limited
has been appointed by the Contractor to implement the Environmental Monitoring
& Audit (EM&A) programme for the Contract in accordance with the
Updated EM&A Manual for HKLR (Version 1.0) and will be providing
environmental team services to the Contract.
This is the forty-eighth Monthly EM&A
report for the Contract which summarizes the monitoring results and audit
findings of the EM&A programme during the reporting period from 1 to 30 September 2016.
Environmental
Monitoring and Audit Progress
The monthly EM&A
programme was undertaken in accordance with the Updated EM&A Manual for
HKLR (Version 1.0). A summary of
the monitoring activities during this reporting month is listed below:
1-hr TSP
Monitoring |
1, 7, 13, 19, 23 and 29 September 2016 |
24-hr TSP
Monitoring |
6, 12, 17, 22 and 28
September 2016 |
Noise
Monitoring |
1, 7, 13, 19 and 29 September 2016 |
Water Quality
Monitoring |
2, 5, 7, 9,
12, 14, 16, 19, 21, 23, 26, 28 and 30 September 2016 |
Mudflat Monitoring (Mudflat) |
1, 3, 4, 17 and 18 September 2016 |
Mudflat
Monitoring (Sedimentation Rate) |
1 September 2016 |
Chinese White
Dolphin Monitoring |
13, 14, 21 and 23 September 2016 |
Site
Inspection |
7, 14, 21 and
30 September 2016 |
As thunderstorm warning was
hoisted by Hong Kong Observatory on 9 Sep 2016 (from 09:15 to 14:00), water
quality monitoring at all stations for mid-flood tide on 9 Sep 2016 was
cancelled for safety reason.
Due to boat availability, the
dolphin monitoring schedule was rescheduled from 26 Sep 2016 to 23 Sep 2016. As
a typhoon was approaching Hong Kong, the dolphin monitoring schedule was
rescheduled from 15 Sep to 14 Sep 2016.
Breaches of Action and Limit Levels
A summary of environmental
exceedances for this reporting month is as follows:
Environmental Monitoring |
Parameters |
Action Level (AL) |
Limit Level (LL) |
Air Quality |
1-hr TSP |
0 |
0 |
24-hr TSP |
0 |
0 |
|
Noise |
Leq (30
min) |
0 |
0 |
Water Quality |
Suspended
solids level (SS) |
1 |
0 |
Turbidity
level |
0 |
0 |
|
Dissolved
oxygen level (DO) |
0 |
0 |
Complaint
Log
There were no complaints
received in relation to the environmental impacts during the reporting period.
Notifications
of Summons and Prosecutions
There were no notifications
of summons or prosecutions received during this reporting month.
Reporting
Changes
This report has been
developed in compliance with the reporting requirements for the subsequent
EM&A reports as required by the Updated EM&A Manual for HKLR (Version
1.0).
The proposal for the change
of Action Level and Limit Level for suspended solid and turbidity was approved
by EPD on 25 March 2013.
The revised Event and
Action Plan for dolphin monitoring was approved by EPD on 6 May 2013.
The original monitoring
station at IS(Mf)9 (Coordinate- East:813273, North 818850) was observed inside
the perimeter silt curtain of Contract HY/2010/02 on 1 July 2013, as such the
original impact water quality monitoring location at IS(Mf)9 was temporarily
shifted outside the silt curtain. As advised by the Contractor of HY/2010/02 in
August 2013, the perimeter silt curtain was shifted to facilitate safe
anchorage zone of construction barges/vessels until end of 2013 subject to
construction progress. Therefore,
water quality monitoring station IS(Mf)9 was shifted to 813226E and 818708N
since 1 July 2013. According to the
water quality monitoring team¡¦s observation on 24 March 2014, the original
monitoring location of IS(Mf)9 was no longer enclosed by the perimeter silt
curtain of Contract HY/2010/02. Thus, the impact water quality monitoring works
at the original monitoring location of IS(Mf)9 has been resumed since 24 March
2014.
Transect lines 1, 2, 7, 8,
9 and 11 for dolphin monitoring have been revised due to the obstruction of the
permanent structures associated with the construction works of HKLR and the
southern viaduct of TM-CLKL, as well as provision of adequate buffer distance
from the Airport Restricted Areas.
The EPD issued a memo and confirmed that they had no objection on the
revised transect lines on 19 August 2015.
Future
Key Issues
The future key issues
include potential noise, air quality, water quality and ecological impacts and
waste management arising from the following construction activities to be
undertaken in the upcoming month:
¡P
Works for Diversion of Airport Road;
¡P
Excavation
and Lateral Support Works at shaft 3 extension north shaft (Package T1.12.1) at
Kwo Lo Wan Road;
¡P
Superstructure
works for Scenic Hill Tunnel West Portal Ventilation building at West Portal.
¡P
New reclamation along the east coast
of the approximately 23 hectares.
¡P
Tunnel of Scenic Hill (Tunnel SHT)
from Scenic Hill to the new reclamation, of approximately 1km in length with
three (3) lanes for the east bound carriageway heading to the HKBCF and four
(4) lanes for the westbound carriageway heading to the HZMB Main Bridge.
¡P
An abutment of the viaduct portion of
the HKLR at the west portal of Tunnel SHT and associated road works at the west
portal of Tunnel SHT.
¡P
An at grade road on the new
reclamation along the east coast of the HKIA to connect with the HKBCF, of
approximately 1.6 km along dual 3-lane carriageway with hard shoulder for each
bound.
¡P
Road links between the HKBCF and the
HKIA including new roads and the modification of existing roads at the HKIA,
involving viaducts, at grade roads and a Tunnel HAT.
¡P
A highway operation and maintenance
area (HMA) located on the new reclamation, south of the Dragonair Headquarters
Building, including the construction of buildings, connection roads and other
associated facilities.
¡P
Associated civil, structural,
building, geotechnical, marine, environmental protection, landscaping, drainage
and sewerage, tunnel and highway electrical and mechanical works, together with
the installation of street lightings, traffic aids and sign gantries, water
mains and fire hydrants, provision of facilities for installation of traffic
control and surveillance system (TCSS), reprovisioning works of affected
existing facilities, implementation of transplanting, compensatory planting and
protection of existing trees, and implementation of an environmental monitoring
and audit (EM&A) program.
Table
1.1 Contact
Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
Supervising Officer¡¦s
Representative |
(Chief
Resident Engineer, CRE) |
Robert Antony
Evans |
3968 0801 |
2109 1882 |
Environmental Project Office /
Independent Environmental Checker |
Environmental Project Office Leader |
Y. H. Hui |
3465
2888 |
3465
2899 |
Independent Environmental Checker |
Antony Wong |
3465
2888 |
3465
2899 |
|
Contractor |
Project Manager |
S. Y. Tse |
3968
7002 |
2109
2588 |
Environmental Officer |
Federick Wong |
3968
7117 |
2109
2588 |
|
Environmental Team |
Environmental Team Leader |
Claudine Lee |
2241
9847 |
2815
3377 |
24
hours complaint hotline |
--- |
--- |
5699
5730 |
--- |
Table 1.2 Construction Activities During Reporting Month
Description
of Activities |
Site
Area |
Dismantling/trimming of temporary 40mm stone platform for construction
of seawall |
Portion X |
Construction of seawall |
Portion X |
Loading and unloading of filling materials |
Portion X |
Pipe piling |
Portion X |
Excavation and lateral support works for Scenic Hill Tunnel (Cut &
Cover Tunnel) |
Portion X |
Construction of tunnel box structure at Scenic Hill Tunnel (Cut &
Cover Tunnel) |
Portion X |
Backfilling at Scenic Hill Tunnel (Cut & Cover Tunnel) |
Portion X |
Excavation for HKBCF to Airport Tunnel |
Portion X |
Excavation for HKBCF to Airport Tunnel |
Portion X |
Excavation for diversion of culvert PR9 and PR14 |
Portion X |
Works for diversion |
Airport Road |
Utilities detection |
Airport Road/
Airport Express Line/ East Coast Road |
Establishment of site access |
Airport Road/
Airport Express Line/ East Coast Road |
Mined tunnel excavation/ box jacking underneath Airport Road and Airport Express Line |
Airport
Road and Airport
Express Line |
Excavation and lateral support works at shaft 3 extension north shaft (Package
T1.12.1) |
Kwo Lo Wan
Road |
Excavation and Lateral Support Works & Construction of Tunnel Box
Structure for HKBCF to Airport Tunnel West (Cut & Cover Tunnel) |
Airport Road |
Excavation and lateral support works & construction of tunnel box
structure for HKBCF to Airport Tunnel East (Cut & Cover Tunnel) |
Portion X |
Utility culvert excavation |
Portion Y |
Sub-structure & superstructure works for Highway Operation and
Maintenance Area Building |
Portion Y |
Superstructure works for Scenic Hill Tunnel West Portal Ventilation
building |
West Portal |
Excavation for Scenic Hill Tunnel |
West Portal |
Table 2.1 Action
and Limit Levels for 1-hour TSP
Monitoring
Station |
Action Level,
µg/m3 |
Limit Level,
µg/m3 |
AMS 5 ¡V Ma Wan Chung Village (Tung Chung) |
352 |
500 |
AMS 6 ¡V Dragonair / CNAC (Group) Building (HKIA) |
360 |
Table 2.2 Action
and Limit Levels for 24-hour TSP
Monitoring
Station |
Action Level,
µg/m3 |
Limit Level,
µg/m3 |
AMS 5 ¡V Ma Wan Chung Village (Tung Chung) |
164 |
260 |
AMS 6 ¡V Dragonair / CNAC (Group) Building (HKIA) |
173 |
260 |
Table 2.3 Air
Quality Monitoring Equipment
Equipment |
Brand and
Model |
Portable direct reading
dust meter (1-hour TSP) |
Sibata Digital Dust
Monitor (Model No. LD-3B) |
High Volume Sampler |
Tisch Environmental
Mass Flow Controlled Total Suspended Particulate (TSP) High Volume Air
Sampler (Model No. TE-5170) |
Table
2.4 Locations
of Impact Air Quality Monitoring Stations
Monitoring Station |
Location |
AMS5 |
Ma Wan Chung Village
(Tung Chung) |
AMS6 |
Dragonair / CNAC
(Group) Building (HKIA) |
Table 2.5 Air
Quality Monitoring Parameters, Frequency and Duration
Parameter |
Frequency and Duration |
1-hour TSP |
Three times every 6 days while the highest dust
impact was expected |
24-hour TSP |
Once every 6 days |
(a) The HVS was installed in the vicinity of the air
sensitive receivers. The following criteria were considered in the installation
of the HVS.
(i) A horizontal platform with appropriate support to
secure the sampler against gusty wind was provided.
(ii) The distance between the HVS and any obstacles,
such as buildings, was at least twice the height that the obstacle protrudes
above the HVS.
(iii) A minimum of 2 meters separation from walls,
parapets and penthouse for rooftop sampler was provided.
(iv) No furnace or incinerator flues are nearby.
(v) Airflow around the sampler was unrestricted.
(vi) Permission was obtained to set up the samplers and
access to the monitoring stations.
(vii) A secured supply of electricity was obtained to
operate the samplers.
(viii) The sampler was located more than 20 meters from any
dripline.
(ix) Any wire fence and gate, required to protect the
sampler, did not obstruct the monitoring process.
(x) Flow control accuracy was kept within ¡Ó2.5%
deviation over 24-hour sampling period.
(b) Preparation of Filter Papers
(i) Glass fibre filters, G810 were labelled and
sufficient filters that were clean and without pinholes were selected.
(ii) All filters were equilibrated in the conditioning
environment for 24 hours before weighing. The conditioning environment
temperature was around
(iii) All filter papers were prepared and analysed by ALS
Technichem (HK) Pty Ltd., which is a HOKLAS accredited laboratory and has
comprehensive quality assurance and quality control programmes.
(c) Field Monitoring
(i) The power supply was checked to ensure the HVS
works properly.
(ii) The filter holder and the area surrounding the
filter were cleaned.
(iii) The filter holder was removed by loosening the four
bolts and a new filter, with stamped number upward, on a supporting screen was
aligned carefully.
(iv) The filter was properly aligned on the screen so
that the gasket formed an airtight seal on the outer edges of the filter.
(v) The swing bolts were fastened to hold the filter
holder down to the frame. The
pressure applied was sufficient to avoid air leakage at the edges.
(vi) Then the shelter lid was closed and was secured
with the aluminium strip.
(vii) The HVS was warmed-up for about 5 minutes to
establish run-temperature conditions.
(viii) A new flow rate record sheet was set into the flow
recorder.
(ix) On site temperature and atmospheric pressure
readings were taken and the flow rate of the HVS was checked and adjusted at
around 1.1 m3/min, and complied with the range specified in the
Updated EM&A Manual for HKLR (Version 1.0) (i.e. 0.6-1.7 m3/min).
(x) The programmable digital timer was set for a
sampling period of 24 hours, and the starting time, weather condition and the
filter number were recorded.
(xi) The initial elapsed time was recorded.
(xii) At the end of sampling, on site temperature and
atmospheric pressure readings were taken and the final flow rate of the HVS was
checked and recorded.
(xiii) The final elapsed time was recorded.
(xiv) The sampled filter was removed carefully and folded
in half length so that only surfaces with collected particulate matter were in
contact.
(xv) It was then placed in a clean plastic envelope and
sealed.
(xvi) All monitoring information was recorded on a
standard data sheet.
(xvii) Filters were then sent to ALS Technichem (HK) Pty
Ltd. for analysis.
(d) Maintenance and Calibration
(i) The HVS and its accessories were maintained in good
working condition, such as replacing motor brushes routinely and checking
electrical wiring to ensure a continuous power supply.
(ii) 5-point calibration of the HVS was conducted using
TE
(iii) Calibration certificate of the HVSs are provided in
Appendix C.
(a) Measuring Procedures
The measuring procedures of
the 1-hour dust meter were in accordance with the Manufacturer¡¦s Instruction
Manual as follows:-
(i)
Turn
the power on.
(ii) Close the air collecting opening cover.
(iii) Push the ¡§TIME SETTING¡¨ switch to [BG].
(iv) Push ¡§START/STOP¡¨ switch to perform background
measurement for 6 seconds.
(v) Turn the knob at SENSI ADJ position to insert the
light scattering plate.
(vi) Leave the equipment for 1 minute upon ¡§SPAN CHECK¡¨ is
indicated in the display.
(vii) Push ¡§START/STOP¡¨ switch to perform automatic
sensitivity adjustment. This measurement takes 1 minute.
(viii) Pull out the knob and return it to MEASURE
position.
(ix) Push the ¡§TIME SETTING¡¨ switch the time set in the
display to 3 hours.
(x) Lower down the air collection opening cover.
(xi) Push ¡§START/STOP¡¨ switch to start measurement.
(b) Maintenance and Calibration
(i) The
1-hour TSP meter was calibrated at 1-year intervals against a Tisch Environmental
Mass Flow Controlled Total Suspended Particulate (TSP) High Volume Air Sampler.
Calibration certificates of the Laser Dust Monitors are provided in Appendix C.
Table 2.6 Summary of 1-hour TSP
Monitoring Results During the Reporting Month
Monitoring Station |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
AMS5 |
89 |
57-113 |
352 |
500 |
AMS6 |
103 |
59-181 |
360 |
500 |
Table 2.7 Summary
of 24-hour TSP Monitoring Results During the Reporting Month
Monitoring
Station |
Average (mg/m3) |
Range (mg/m3) |
Action
Level (mg/m3) |
Limit Level (mg/m3) |
AMS5 |
61 |
28-107 |
164 |
260 |
AMS6 |
56 |
26-92 |
173 |
260 |
Table 3.1 Action
and Limit Levels for Noise during Construction Period
Monitoring Station |
Time Period |
Action Level |
Limit Level |
NMS5 ¡V Ma Wan
Chung Village (Ma Wan Chung Resident Association) (Tung Chung) |
0700-1900
hours on normal weekdays |
When one
documented complaint is received |
75 dB(A) |
Table 3.2 Noise
Monitoring Equipment
Equipment |
Brand and Model |
Integrated
Sound Level Meter |
B&K 2238 |
Acoustic
Calibrator |
B&K 4231 |
Table 3.3 Locations
of Impact Noise Monitoring Stations
Monitoring Station |
Location |
NMS5 |
Ma Wan Chung
Village (Ma Wan Chung Resident Association) (Tung Chung) |
Table 3.4 Noise
Monitoring Parameters, Frequency and Duration
Parameter |
Frequency and Duration |
30-mins
measurement at each monitoring station between 0700 and 1900 on normal
weekdays (Monday to Saturday). Leq, L10 and L90
would be recorded. |
At least once
per week |
(a) The sound level
meter was set on a tripod at a height of
(b) The battery
condition was checked to ensure the correct functioning of the meter.
(c)
Parameters such
as frequency weighting, the time weighting and the measurement time were set as
follows:-
(i) frequency
weighting: A
(ii) time weighting:
Fast
(iii) time
measurement: Leq(30-minutes) during non-restricted hours i.e. 07:00
¡V 1900 on normal weekdays
(d) Prior to and
after each noise measurement, the meter was calibrated using the acoustic
calibrator for 94.0 dB(A) at 1000 Hz.
If the difference in the calibration level before and after measurement
was more than 1.0 dB(A), the measurement would be considered invalid and repeat
of noise measurement would be required after re-calibration or repair of the
equipment.
(e) During the
monitoring period, the Leq, L10 and L90 were
recorded. In addition, site
conditions and noise sources were recorded on a standard record sheet.
(f) Noise
measurement was paused during periods of high intrusive noise (e.g. dog
barking, helicopter noise) if possible. Observations were recorded when
intrusive noise was unavoidable.
(g) Noise monitoring
was cancelled in the presence of fog, rain, wind with a steady speed exceeding
(a) The microphone
head of the sound level meter was cleaned with soft cloth at regular intervals.
(b) The meter and
calibrator were sent to the supplier or HOKLAS laboratory to check and
calibrate at yearly intervals.
(c) Calibration
certificates of the sound level meters and acoustic calibrators are provided in
Appendix C.
Table 3.5 Summary
of Construction Noise Monitoring Results During the Reporting Month
Monitoring Station |
Average Leq (30 mins), dB(A) |
Range of Leq (30 mins), dB(A) |
Limit Level Leq (30 mins), dB(A) |
NMS5 |
58 |
54 ¡V 63 |
75 |
Table 4.1 Action
and Limit Levels for Water Quality
Parameter (unit) |
Water Depth |
Action Level |
Limit Level |
Dissolved
Oxygen (mg/L) (surface, middle and bottom) |
Surface and
Middle |
5.0 |
4.2 except 5
for Fish Culture Zone |
Bottom |
4.7 |
3.6 |
|
Turbidity
(NTU) |
Depth average |
27.5 or 120%
of upstream control station¡¦s turbidity at the same tide of the same day; The action
level has been amended to ¡§27.5 and 120% of upstream control
station¡¦s turbidity at the same tide of the same day¡¨ since 25 March 2013. |
47.0 or 130%
of turbidity at the upstream control station at the same tide of same day; The limit
level has been amended to ¡§47.0 and 130% of turbidity at the
upstream control station at the same tide of same day¡¨ since 25 March 2013. |
Suspended
Solid (SS) (mg/L) |
Depth average |
23.5 or 120%
of upstream control station¡¦s SS at the same tide of the same day; The action
level has been amended to ¡§23.5 and 120% of upstream control
station¡¦s SS at the same tide of the same day¡¨ since 25 March 2013. |
34.4 or 130%
of SS at the upstream control station at the same tide of same day and 10mg/L
for Water Services Department Seawater Intakes; The limit
level has been amended to ¡§34.4 and 130% of SS at the upstream
control station at the same tide of same day and 10mg/L for Water Services
Department Seawater Intakes¡¨ since 25 March 2013 |
Notes:
(1)
Depth-averaged is calculated by taking the
arithmetic means of reading of all three depths.
(2)
For DO, non-compliance of the water quality limit
occurs when monitoring result is lower that the limit.
(3)
For SS & turbidity non-compliance of the water
quality limits occur when monitoring result is higher than the limits.
(4)
The change to the Action and limit Levels for Water
Quality Monitoring for the EM&A works was approved by EPD on 25 March 2013.
Table 4.2 Water
Quality Monitoring Equipment
Equipment |
Brand and Model |
DO and
Temperature Meter, Salinity Meter, Turbidimeter and pH Meter |
YSI Model 6820
V2-M, 650 |
Positioning
Equipment |
DGPS ¡V KODEN :
KGP913MkII, KBG3 |
Water Depth
Detector |
Layin
Associates: SM-5 & SM5A |
Water Sampler |
Wildlife
Supply Company : 5487-10 |
Table 4.3 Impact
Water Quality Monitoring Parameters and Frequency
Monitoring Stations |
Parameter, unit |
Frequency |
No. of depth |
Impact Stations: Control/Far Field
Stations: Sensitive Receiver
Stations: |
¡P
Depth, m ¡P
Temperature, oC ¡P
Salinity, ppt ¡P
Dissolved Oxygen (DO), mg/L ¡P
DO Saturation, % ¡P
Turbidity, NTU ¡P
pH ¡P
Suspended Solids (SS), mg/L |
Three times per week
during mid-ebb and mid-flood tides (within ¡Ó 1.75 hour of the predicted time) |
3 (1 m below water surface,
mid-depth and 1 m above sea bed, except where the water depth is less than 6
m, in which case the mid-depth station may be omitted. Should the water depth
be less than 3 m, only the mid-depth station will be monitored). |
Table 4.4 Impact
Water Quality Monitoring Stations
Monitoring Stations |
Description |
Coordinates |
|
Easting |
Northing |
||
IS5 |
Impact Station
(Close to HKLR construction site) |
811579 |
817106 |
IS(Mf)6 |
Impact Station
(Close to HKLR construction site) |
812101 |
817873 |
IS7 |
Impact Station
(Close to HKBCF construction site) |
812244 |
818777 |
IS8 |
Impact Station
(Close to HKBCF construction site) |
814251 |
818412 |
IS(Mf)9 |
Impact Station
(Close to HKBCF construction site) |
813273 |
818850 |
IS10 |
Impact Station
(Close to HKBCF construction site) |
812577 |
820670 |
SR3 |
Sensitive
receivers (San Tau SSSI) |
810525 |
816456 |
SR4 |
Sensitive
receivers (Tai Ho Inlet) |
814760 |
817867 |
SR5 |
Sensitive
receivers (Artificial Reef In NE Airport) |
811489 |
820455 |
SR10A |
Sensitive
receivers (Ma Wan Fish Culture Zone) |
823741 |
823495 |
SR10B |
Sensitive
receivers (Ma Wan Fish Culture Zone) |
823686 |
823213 |
CS2 |
Control
Station (Mid-Ebb) |
805849 |
818780 |
CS(Mf)5 |
Control
Station (Mid-Flood) |
817990 |
821129 |
(a) The
in-situ water quality parameters including dissolved oxygen, temperature, salinity
and turbidity, pH were measured by multi-parameter meters.
(a) Digital Differential Global Positioning
Systems (DGPS) were used to ensure that the correct location was selected prior
to sample collection.
(b) Portable, battery-operated echo sounders
were used for the determination of water depth at each designated monitoring
station.
(c) All in-situ measurements were taken at 3
water depths, 1 m below water surface, mid-depth and 1 m above sea bed, except
where the water depth was less than 6 m, in which case the mid-depth station
was omitted. Should the water depth be less than 3 m, only the mid-depth
station was monitored.
(d) At each measurement/sampling depth, two
consecutive in-situ monitoring (DO concentration and saturation, temperature,
turbidity, pH, salinity) and water sample for SS. The probes were retrieved out
of the water after the first measurement and then re-deployed for the second
measurement. Where the difference in the value between the first and second
readings of DO or turbidity parameters was more than 25% of the value of the
first reading, the reading was discarded and further readings were taken.
(e) Duplicate samples from each independent
sampling event were collected for SS measurement. Water samples were collected
using the water samplers and the samples were stored in high-density polythene
bottles. Water samples collected were well-mixed in the water sampler prior to
pre-rinsing and transferring to sample bottles. Sample bottles were pre-rinsed
with the same water samples. The sample bottles were then be packed in
cool-boxes (cooled at 4oC without being frozen), and delivered to
ALS Technichem (HK) Pty Ltd. for the analysis of suspended solids
concentrations. The laboratory determination work would be started within 24
hours after collection of the water samples. ALS Technichem (HK) Pty Ltd. is a
HOKLAS accredited laboratory and has comprehensive quality assurance and
quality control programmes.
(f) The analysis method and detection limit for
SS is shown in Table 4.5.
Table 4.5 Laboratory Analysis for Suspended Solids
Parameters |
Instrumentation |
Analytical Method |
Detection Limit |
Suspended
Solid (SS) |
Weighting |
APHA 2540-D |
0.5mg/L |
(g) Other relevant data were recorded, including
monitoring location / position, time, water depth, tidal stages, weather
conditions and any special phenomena or work underway at the construction site
in the field log sheet for information.
Table 4.6 Summary
of Water Quality Exceedances
Station |
Exceedance Level |
DO (S&M) |
DO (Bottom) |
Turbidity |
SS |
Total number of exceedances |
|||||
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
Ebb |
Flood |
||
IS5 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
IS(Mf)6 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
IS7 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
IS8 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
IS(Mf)9 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
IS10 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
19
Sep 2016 |
0 |
1 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
SR3 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
SR4 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
SR5 |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
SR10A |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
SR10B |
Action Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
Limit Level |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0 |
0 |
|
Total |
Action |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1** |
|
Limit |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0** |
Notes:
S: Surface;
M: Mid-depth;
** The total number of exceedances
Table 5.1 Action
and Limit Levels for Dolphin Monitoring
|
North Lantau Social Cluster |
|
NEL |
NWL |
|
Action Level |
STG < 4.2 & ANI < 15.5 |
STG < 6.9
& ANI < 31.3 |
Limit Level |
(STG < 2.4
& ANI < 8.9) and (STG < 3.9 & ANI < 17.9) |
Remarks:
1. STG means quarterly encounter rate of number of dolphin sightings.
2. ANI means quarterly encounter rate of total number of dolphins.
3. For North Lantau Social Cluster, AL will be trigger if either NEL or NWL fall below the criteria; LL will
be triggered if both NEL and NWL
fall below the criteria.
Table 5.2 Co-ordinates
of Transect Lines
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 |
805475 |
815913* |
|
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 |
820880* |
|
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 |
820872 |
|
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 |
|
|
|
|
|
12 |
End Point |
815542 |
824882 |
|
|
|
|
|
Note:
Co-ordinates in red and marked with asterisk are revised co-ordinates of
transect line.
Table
5.3 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: September 13th / 14th |
0.0 |
0.0 |
Set 2: September 21st / 23rd |
0.0 |
0.0 |
|
NWL |
Set 1: September 13th / 14th |
0.0 |
0.0 |
Set 2: September 21st / 23rd |
5.8 |
30.2 |
Remarks:
1. Dolphin Encounter Rates Deduced from the Two
Sets of Surveys (Two Surveys in Each Set) in September 2016 in
Northeast Lantau (NEL) and Northwest Lantau (NWL).
Table 5.4 Monthly
Average Encounter Rates
|
(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 |
Both Primary and
Secondary Lines |
Primary Lines Only |
Both Primary and
Secondary Lines |
|
Northeast Lantau |
0.0 |
0.0 |
0.0 |
0.0 |
Northwest Lantau |
3.2 |
2.5 |
16.8 |
12.9 |
Remarks:
1.
Monthly Average Dolphin
Encounter Rates (Sightings Per 100 km of Survey Effort) from All Four Surveys
Conducted in September 2016 on Primary Lines only as well as Both Primary
Lines and Secondary Lines in Northeast Lantau (NEL) and Northwest Lantau (NWL).
Table 6.1 Reference
Station Survey result and GNSS RTK calibration result of Round 1
Reference
Station |
Easting
(m) |
Northing
(m) |
Baseline
reference elevation (mPD) (A) |
Round
1 Survey (mPD) (B) |
Calibration
Adjustment (B-A) |
T1 |
811248.660mE |
816393.173mN |
3.840 |
3.817 |
-0.023 |
T2 |
810806.297mE |
815691.822mN |
4.625 |
4.653 |
+0.028 |
T3 |
810778.098mE |
815689.918mN |
4.651 |
4.660 |
+0.009 |
T4 |
810274.783mE |
816689.068mN |
2.637 |
2.709 |
+0.072 |
Table 6.2 Measured
Mudflat Surface Level Results
Baseline Monitoring (September
2012) |
Impact Monitoring (June 2016) |
|||||
Monitoring Station |
Easting (m) |
Northing (m) |
Surface Level (mPD) |
Easting (m) |
Northing (m) |
Surface Level (mPD) |
S1 |
810291.160 |
816678.727 |
0.950 |
810291.189 |
816678.707 |
1.044 |
S2 |
810958.272 |
815831.531 |
0.864 |
810958.257 |
815831.465 |
0.929 |
S3 |
810716.585 |
815953.308 |
1.341 |
810716.522 |
815953.252 |
1.372 |
S4 |
811221.433 |
816151.381 |
0.931 |
811221.407 |
816151.382 |
0.959 |
Table 6.3 Comparison
of measurement
Comparison of measurement |
Remarks and Recommendation |
|||
Monitoring
Station |
Easting
(m) |
Northing
(m) |
Surface
Level (mPD) |
|
S1 |
0.029 |
-0.020 |
0.094 |
Level continuously
increased |
S2 |
-0.015 |
-0.066 |
0.065 |
Level continuously
increased |
S3 |
-0.063 |
-0.056 |
0.031 |
Level continuously
increased |
S4 |
-0.026 |
0.001 |
0.028 |
Level continuously
increased |
Table 6.4 Impact Water
Quality Monitoring Results (Depth Average)
Date |
Mid Ebb
Tide |
Mid Flood
Tide |
||||
DO (mg/L) |
Turbidity
(NTU) |
SS (mg/L) |
DO (mg/L) |
Turbidity
(NTU) |
SS (mg/L) |
|
2-Sep-16 |
5.89 |
14.65 |
17.55 |
5.48 |
7.20 |
7.25 |
5-Sep-16 |
6.23 |
9.30 |
9.30 |
5.90 |
5.90 |
6.85 |
7-Sep-16 |
5.98 |
7.35 |
6.05 |
5.91 |
4.20 |
6.10 |
9-Sep-16 |
6.29 |
3.20 |
4.20 |
See Remark 1 |
See Remark 1 |
See Remark 1 |
12-Sep-16 |
5.90 |
4.75 |
4.15 |
6.59 |
2.85 |
3.35 |
14-Sep-16 |
6.86 |
5.75 |
6.80 |
6.91 |
7.05 |
8.65 |
16-Sep-16 |
6.89 |
4.85 |
5.20 |
7.13 |
5.00 |
6.45 |
19-Sep-16 |
5.66 |
9.30 |
10.60 |
5.31 |
7.65 |
9.90 |
21-Sep-16 |
5.43 |
6.35 |
10.70 |
5.53 |
6.60 |
11.95 |
23-Sep-16 |
6.15 |
5.10 |
4.25 |
5.73 |
5.75 |
6.55 |
26-Sep-16 |
5.86 |
3.20 |
5.30 |
6.23 |
4.30 |
6.00 |
28-Sep-16 |
5.78 |
10.45 |
14.10 |
6.10 |
7.75 |
9.95 |
30-Sep-16 |
5.99 |
11.20 |
13.65 |
5.75 |
10.50 |
13.15 |
Average |
6.07 |
7.34 |
8.60 |
6.05 |
6.23 |
8.01 |
Remark:
1.
As thunderstorm warning was hoisted by Hong Kong Observatory on 9
Sep 2016 (from 09:15 to 14:00), water quality monitoring at all stations for
mid-flood tide on 9 Sep 2016 was cancelled for safety reason.
H¡¦= -£U ( Ni / N ) ln ( Ni / N ) (Shannon and
Weaver, 1963)
J = H¡¦
/ ln S, (Pielou, 1966)
where S is the total number of species in
the sample, N is the total number of individuals, and Ni is the number of
individuals of the ith species.
Table
6.5 Event and
Action Plan for Mudflat Monitoring
Event |
ET Leader |
IEC |
SO |
Contractor |
Density or the distribution pattern of horseshoe crab, seagrass or
intertidal soft shore communities recorded in the impact or post-construction
monitoring are significantly
lower than or different from those recorded in the baseline monitoring. |
Review historical data to ensure differences are as a result of
natural variation or previously observed seasonal differences; Identify source(s) of impact; Inform the IEC, SO and Contractor; Check monitoring data; Discuss additional monitoring and any other measures, with the IEC and
Contractor. |
Discuss monitoring with the ET and the Contractor; Review proposals for additional monitoring and any other measures submitted
by the Contractor and advise the SO accordingly. |
Discuss with the IEC additional monitoring requirements and any other
measures proposed by the ET; Make agreement on the measures to be implemented. |
Inform the SO and in writing; Discuss with the ET and the IEC and propose measures to the IEC and
the ER; Implement the agreed measures. |
Notes:
ET ¡V Environmental Team
IEC ¡V Independent Environmental Checker
SO ¡V Supervising Officer
Population
difference among the sampling zones
Box plot of horseshoe crab populations in TC3
Impact of the HKLR project
Temporal variation of seagrass beds
Unfavourable conditions to seagrass Halophila
ovalis
Recolonization of seagrass beds
Impact of the HKLR project
Dominant species
in every sampling zone
Biodiversity and abundance of soft shore communities
Table 7.1 Summary of Environmental Site Inspections
Date
of Audit |
Observations |
Actions
Taken by Contractor / Recommendation |
Date
of Observations Closed |
30 Aug
2016 |
1.
It was observed that
wastewater treatment plant was overloaded at PR9. 2.
No drip tray was provided
for chemical containers at Shaft 3. 3.
Concrete waste was observed
at Shaft 3. 4.
No drip tray was provided
for chemical containers at N1. 5.
Over 20 bags of cement
were not entirely covered with impervious sheets at N1. . 6.
Stagnant water was
observed at N1 adjacent to HY/2011/09 site. 7.
Stagnant water was
observed inside the building at N1. 8.
Rubbish was accumulated
at N1. |
1.
The wastewater treatment
facility was functioned properly at PR9. 2.
The chemical containers
were removed at Shaft 3. 3.
The concrete waste was
removed by contractor at Shaft 3. 4.
The chemical container
was removed at N1. 5.
The bags of cement were
covered properly at N1. 6.
The stagnant water was
removed by a pump at N1. 7.
The stagnant water was
removed by contractor at N1. 8.
The rubbish was removed
at N1. |
7 Sep 2016 |
7 Sep 2016 |
1.
Gaps were observed
between silt curtains at Portion X. 2.
Abandon blue hoses were
observed at PR9. 3.
A gap was found between
the water barrier and construction materials at S7. 4.
A gap was found below the
earth bund at S7. 5.
Oil leakages were
observed at Shaft 2. 6.
No water spraying was
provided for concrete breaking activities at Shaft 2. 7.
Stagnant water was found
inside a H-beam at Shaft 2. 8.
No drip tray was provided
for oil drums at Shaft 2. 9.
Stagnant water was
observed at Shaft 2. 10. Stagnant
water was observed at West Portal. 11. Rubbish
and plastic containers were scattered inside the West Portal. 12. Rubbish
was scattered inside the West Portal. 13. Empty
chemical drums were found inside the West Portal. 14. More
than 20 bags of cement were not covered inside the West Portal. 15. No
drip tray was provided for oil drums inside the West Portal. |
1.
The silt curtains were
maintained by contractor at Portion X. 2.
Abandon blue hoses were
removed by the Contractor at PR9. 3.
Sand bags were placed to
seal the gap between the water barrier and construction materials at S7. 4.
The gap under earth bund
was sealed by the Contractor at S7. 5.
The oil leakages was
cleaned up by the Contractor at Shaft 2.
6.
Water spraying was
provided for the concrete breaking activities at Shaft 2. 7.
The stagnant water was
removed from the H-beam at Shaft 2. 8.
The oil drums were
removed from Shaft 2. 9.
The stagnant water was
removed from Shaft 2. 10. The
stagnant water was removed from West Portal. 11. The
rubbish and plastic containers were removed from West Portal. 12. The
rubbish was removed from West Portal. 13. The
empty chemical drums were removed from West Portal. 14. Properly
cover was provided for cement bags at West Portal. 15. The
oil drums were removed from West Portal. |
14 Sep 2016 |
14 Sep
2016 |
1.
Gaps were observed between
silt curtains at Portion X. 2.
General waste was not
stored in a container at S11. 3.
More than 20 bags of
cement were not covered at HMA. 4.
Stagnant water was found
at HMA. 5.
Stagnant water was found
at HMA. 6.
Gaps of earth bund were
found at S11. 7.
No drip tray was provided
for oil drums and oil leakage was found at S15. 8.
No labels were not attached on the chemical containers at S15. |
1.
The silt curtains were
maintained by the Contractor at Portion X. 2.
The general waste was
removed by the Contractor at S11. 3.
The cement bags were
removed from HMA. 4.
The stagnant water was
removed from HMA. 5.
The stagnant water was
removed from HMA. 6.
Earth bund was provided
by contractor at S11. 7.
The stagnant water and
chemical containers had been removed at 15. 8.
Label was provided by contactor on the chemical storage area at S15. |
21 Sep
2016 |
21 Sep
2016 |
1.
Gaps were observed
between silt curtains at Portion X. 2.
No water spraying was
provided for the concrete breaking activities at S11. 3.
Temporary hoarding were
not completed along the East Coast Road. 4.
Stagnant water was
observed at HMA. 5.
Blue hoses for
discharging treated wastewater were not placed on ground and not at the
discharge point at PR9. 6.
No earth bund was
provided next to seafront at S7. 7.
No drip tray was provided
for a chemical container at S7. 8.
No drip tray was provided
for oil drums at S15. 9.
No drip tray was provided
for chemical containers at Ventilation Building. |
1.
The silt curtains were
maintained by the Contractor at Portion X. 2.
Water spraying was
provided for the concrete breaking activities at s11. 3.
Temporary hoarding was
installed completely along the East Coast Road. 4.
The stagnant water has
been removed. 5.
The location of blue hoses were arranged and treated
water was discharged at the discharge point at PR9. 6.
Earth bund was provided
next to seafront at S7. 7.
The chemical container
was removed at S7. 8.
Drip tray was provided
for the oil drums at S15. 9.
The chemical containers
were removed at Ventilation Building. |
30 Sep
2016 |
30 Sep
2016 |
1.
Silt curtain with gap was
observed at Portion X. 2.
Stagnant water was
observed at Shaft 3. 3.
No drip tray was provided
for a chemical container at Shaft 3. 4.
Stagnant water was
observed at S8. 5.
Waste accumulation was
observed at Shaft 3. 6.
The drain hole of drip
tray was opened at Shaft 3. |
The Contractor
was recommended to: 1.
Maintain the silt
curtains at Portion X. 2.
Remove stagnant water at Shaft 3. 3.
Provide drip tray for the chemical container or place the chemical
container tot proper storage area at Shaft 3. 4.
Remove the stagnant water at S8. 5.
Remove the waste at Shaft 3. 6.
Seal the drain hole to avoid land contamination at Shaft 3. |
Follow-up
actions for the observations issued for the last weekly site inspection of
the reporting month will be inspected during the next site inspections. |
Table 8.1 Construction
Activities for October 2016
Site Area |
Description of
Activities |
Portion X |
Dismantling/Trimming
of Temporary 40mm Stone Platform for Construction of Seawall |
Portion X |
Construction of Seawall |
Portion X |
Loading and Unloading of
Filling Materials |
Portion X |
Pipe Piling |
Portion X |
Excavation and Lateral Support Works at Scenic
Hill Tunnel (Cut & Cover Tunnel) |
Portion X |
Backfilling at Scenic Hill Tunnel (Cut &
Cover Tunnel) |
Portion X |
Construction of Tunnel Box Structure at Scenic
Hill Tunnel (Cut & Cover Tunnel) |
Portion X |
Excavation
for HKBCF to Airport Tunnel |
Portion X |
Excavation
for Diversion of culvert PR9 and PR14 |
Airport Road |
Works for Diversion of
Airport Road |
Airport Road / Airport Express Line/East Coast
Road |
Utilities Detection |
Airport Road / Airport Express Line/East Coast
Road |
Establishment of Site Access |
Airport Road/Airport Express Line |
Mined Tunnel Excavation/ Box Jacking underneath
Airport Road and Airport Express Line |
Kwo Lo Wan Road |
Excavation and Lateral Support Works at shaft 3
extension north shaft (Package T1.12.1) |
Portion X |
Excavation and Lateral Support Works &
Construction of Tunnel Box Structure
or HKBCF to Airport Tunnel East (Cut & Cover Tunnel) |
Airport Road |
Excavation and Lateral Support Works &
Construction of Tunnel Box Structure for HKBCF to
Airport Tunnel West (Cut & Cover Tunnel) |
Portion Y |
Utility Culvert Excavation |
Portion Y |
Sub-structure & superstructure
works for Highway Operation and Maintenance Area Building |
West Portal |
Excavation for Scenic Hill Tunnel |
West Portal |
Superstructure works for Scenic Hill Tunnel West Portal Ventilation
building |