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.49 (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....... Environmental Site Inspection and Audit
6.2 Advice on the Solid and Liquid Waste Management Status
6.3 Environmental Licenses and Permits
6.4 Implementation Status of Environmental Mitigation Measures
6.5 Summary of Exceedances of the Environmental Quality Performance
Limit
6.6 Summary of Complaints, Notification of Summons and Successful
Prosecution
7.1 Construction Programme for the Coming Months
7.2 Environmental Monitoring Schedule for the Coming Month
Figures
Figure 1.1 Location of
the Site
Figure 2.1 Environmental
Monitoring Stations
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
J Cumulative
Statistics on Complaints
Appendix
K Environmental
Licenses and Permits
Appendix
L Implementation
Schedule of Environmental Mitigation Measures
Appendix
M Record of
¡§Notification of Summons and Prosecutions¡¨
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-ninth 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 31 October 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 |
5, 11, 17 and 27 October 2016 |
24-hr TSP
Monitoring |
4, 8, 14, 20 and 26 October 2016 |
Noise
Monitoring |
5, 11, 17 and 27 October 2016 |
Water Quality
Monitoring |
3, 5, 7, 10,
12, 14, 17, 19, 24, 26, 28 and 31 October 2016 |
Chinese White
Dolphin Monitoring |
4, 7, 11 and
13 October 2016 |
Site
Inspection |
5, 12, 19 and
28 October 2016 |
Due to boat availability and weather
condition, the dolphin monitoring
schedule was rescheduled from 19 October 2016 to 13 October 2016.
As Strong Wind Signal No. 3 was
hoisted by Hong Kong Observatory on 17 October 2016, water quality monitoring
(WQM) was not carried out at stations SR10A and SR10B for mid-ebb tide.
As Tropical Cyclone Warning Signal No. 8
was hoisted by Hong Kong Observatory on 21 October 2016, water quality
monitoring (WQM) was not carried out at all stations for mid-ebb tide and
mid-flood tide. Due to boat availability, the WQM could not be re-scheduled on 22
October 2016.
As Tropical Cyclone Warning
Signal No.8 was hoisted by the Hong Kong Observatory on 21 October 2016, air
quality monitoring at AMS5 (Ma Wan Chung Village) and AMS6 (Dragonair Building)
were cancelled for safety reason. The monitoring was not able to be
re-scheduled on 22 October 2016 because there was some problem with the
equipment. Subsequent to internal checking, the equipment is normal for
operation as scheduled.
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) |
0 |
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 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 |
130 |
87-179 |
352 |
500 |
AMS6 |
115 |
94-146 |
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 |
33 |
10-45 |
164 |
260 |
AMS6 |
45 |
34-63 |
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 |
59 |
54 ¡V 60 |
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 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: October 4th / 7th |
0.0 |
0.0 |
Set 2: October 11th / 13th |
0.0 |
0.0 |
|
NWL |
Set 1: October 4th / 7th |
4.1 |
9.6 |
Set 2: October 11th / 13th |
2.9 |
8.5 |
Remarks:
1. Dolphin Encounter Rates Deduced from the Two
Sets of Surveys (Two Surveys in Each Set) in October 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 |
3.5 |
3.2 |
9.1 |
8.1 |
Remarks:
1.
Monthly Average Dolphin Encounter Rates (Sightings Per 100 km of
Survey Effort) from All Four Surveys Conducted in October 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 Summary of Environmental Site Inspections
Date
of Audit |
Observations |
Actions
Taken by Contractor / Recommendation |
Date
of Observations Closed |
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 Shaft 3. 5.
Stagnant water was
observed at S8. 6.
Waste accumulation was
observed at Shaft 3. 7.
The drain hole of drip
tray was opened at Shaft 3. |
1. The
silt curtains were maintained by the Contractor at Portion X. 2. The
stagnant water was removed by the Contractor at Shaft 3. 3. The
chemical container was removed by the Contractor at Shaft 3. 4. The
stagnant water in I-beam was removed by the Contractor at Shaft 3. 5. The
stagnant water was removed by the Contractor at S8. 6. The
accumulation waste was removed from Shaft 3. 7.
The drain hole of drip
tray was blocked by the Contractor at Shaft 3. |
5 Oct 2016 |
5 Oct 2016 |
1.
Gaps were observed
between silt curtains at Portion X. 2.
No drip trays were
provided for oil drums at S11. 3.
Rubbish was scattered on
the ground at C&C. 4.
No drip tray was provided
for oil drums at HMA. 5.
The waste container was
full at S11. 6.
No drip tray was provided
for oil drums at C&C. 7.
Stagnant water was found
inside a pit at HMA. 8.
Rubbish was found at HMA. 9.
No sand bags were
provided along the along the haul road at S7 to avoid washing away of
sand/silt into the sea. 10. Stagnant
water pool was observed at S8. 11. Wheel
wash water was brought by vehicles onto a public road and flew into a gully
at S15. 12. Stagnant
water was found inside a H beam at S23. 13. An
oil stain was found at S23. 14. A
rubbish bin without cover next to the sea shore was full and rubbish was
accumulated next the rubbish bin at WA6. |
1. The
silt curtains were maintained by the Contractor at Portion X. 2. Some
oil drums were stored inside drip trays and some oil drums were removed by
the Contractor from S11. 3. The
rubbish was removed by the Contractor from C&C. 4. The
oil drums were removed by the Contractor from HMA. 5. The
accumulated waste was removed by the Contractor from S11. 6. The
oil drums were removed by the Contractor from C&C. 7. The
stagnant water was removed from the pit at HMA. 8. The
rubbish was removed by the Contractor from HMA. 9. Sand
bags were placed along the sea front at S7. 10. The
stagnant water pool was removed by the Contractor from S8. 11. The
wheel wash water was cleaned by the Contactor at S15. 12. The
stagnant water was removed from the H beam at S23. 13. The
oil stain was cleaned up at S23. 14. The
accumulation waste was removed from the rubbish bin at WA6. |
12 Oct 2016 |
12 Oct
2016 |
1.
The drain hole of drip
tray was opened at HMA. 2.
General refuse were observed
to store inside a construction waste container at HMA. 3.
Oil drums were found
without drip tray at S25. 4.
Chemical containers were
observed without drip tray at N30. 5.
Treated wastewater was
discharged at gravels at PR9. 6.
One of the wastewater
treatment plant was not operated at PR9. The capacity of the wastewater
treatment system for this area might not be sufficient. 7.
No earth bund was
provided along the sea front at S7. 8.
No earth bund was
provided by the Contractor on the deck of vessel at S7. 9.
No drip tray was provided
for chemical containers at S8. 10. No
drip tray was provided for oil drums at S8. 11. Steel
waste were observed at S7. 12. Cement
mixing station was observed without 3-sides enclosed at S15. However, the cement mixing station was not in operation. 13. No
drip tray was observed for oil drums at S15. 14. Stagnant
water was found inside a drip tray at S15. 15. Accumulated
waste was observed at WA6. |
1.
The drain hole of drip tray was sealed at HMA. 2. The general refuse
waste was separated from the construction waste at HMA. 3.
The oil drums were removed
by contractor at S25. 4.
Chemical containers were removed from N30. 5.
Treated wastewater was connected to two
additional sedimentation tanks and then discharged into drains at PR9. 6.
The wastewater treatment plant was resumed
operation at PR9. 7.
Sand bags were placed next to the sea front at
S7. 8.
Sand bags were provided
on the deck of vessel at S7. 9.
The chemical containers were removed by
contractor at S8. 10. A drip tray was
provided by contractor at S8. 11. The steel waste was
removed at S7. 12. The
cement mixing station was removed at S15. 13. A drip tray was
provided for oil drums at S15. 14. Stagnant water was
cleaned up by contractor at S15. 15. The waste was removed
from WA6. |
19 Oct
2016 |
19 Oct
2016 |
1.
Gap of silt curtain was observed at Portion
X. 2.
The waste container was full at S11. 3.
No drip tray was observed for chemical
containers at C&C. 4.
Groundwater was not pumped into
sedimentation tanks prior to discharge at PR9. 5.
Wastewater treatment plant was malfunction
at PR9. 6.
Stagnant water was observed inside the
abandon oil drums at S7. 7.
Wastewater overflow from a waste water
treatment plant was observed at N1. 8.
General waste was scattered next to a waste
container at N1. 9.
Cement mixing plant was observed without
3-sides cover at West Portal. However, the cement mixing station was not in
operation. 10. No cover was provided for more than 20 bags of cement at West Portal. 11. General waste was accumulated on the ground at West Portal. |
1.
The silt curtains were
maintained and no gaps between sections of silt curtain were found at Portion
X. 2.
The accumulated waste was
removed by the Contractor from S11. 3.
The chemical containers
were removed from C&C. 4.
Groundwater was pumped
into sedimentation tanks prior to discharge. at PR9. 5.
The wastewater treatment
plant was immediately stopped for repair and was resumed in operation at PR9. 6.
The stagnant water was
removed at S7. 7.
The wastewater treatment
plant was fixed and no overflow from the plant was observed at N1. 8.
General refuse next to the
waste container was removed at N1. 9.
The cement mixing plant
was removed at West Portal. 10. The
bags of cement were covered entirely at West Portal. 11. The
general waste was removed on the ground West Portal. |
28 Oct
2016 |
28 Oct
2016 |
1.
Drip tray was not provided for chemical
containers at Shaft 2. 2.
Stagnant water was observed at Shaft
2. 3.
Drip tray was not provided for chemical
containers at S23. 4.
The checklists of wastewater treatment
plant at S23 were not updated. 5.
Damaged cover of dump truck was observed at
S23. 6.
Waste accumulated at S8 was observed.
7.
No water spraying was observed at S8. |
The Contractor
was recommended to: 1.
Provide drip tray for the chemical
containers at Shaft 2. 2.
Remove the stagnant water at Shaft 2. 3.
Provide drip tray for the chemical
containers at S23. 4.
Update the checklist of wastewater
treatment plant at S23. 5.
Repair the cover of the dump truck at S23. 6.
Remove accumulated water at S8. 7.
Provide water spraying for the dust
emission area at S8. |
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 7.1 Construction
Activities for November 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 |
The tentative schedule for environmental monitoring in November 2016 is
provided in Appendix D.