Tung Chung New Town Extension (TCNTE) is
one of the major initiatives under the Government's multi-pronged approach to
increase land supply to meet Hong Kong's medium- to long-term needs for
housing, economic and social developments. The Environmental Impact Assessment
(EIA) Report for TCNTE (Register No. AEIAR-196/2016) was approved on 8 April
2016 and the Environmental Permit (EP) No. EP-519/2016, covering the
construction and operation of TCNTE, was granted on 9 August 2016. The EIA
Report and EP cover both Tung Chung East (TCE) and Tung Chung West (TCW). ERM-Hong
Kong, Limited (ERM) is commissioned to undertake the role of Environmental Team
(ET) for the construction and operation of TCE Project (¡§the Project¡¨) in
accordance with the requirements specified in the EP, Updated Environmental Monitoring and Audit
(EM&A) Manual, EIA Report of the TCNTE project
and other relevant
statutory requirements. The construction of the Project
commenced on 9 July 2018.
This is the Monthly EM&A report presenting the EM&A works
carried out during the period from 9 to 31 July 2018 for the Project in
accordance with the Updated EM&A Manual. As informed by the Contractor, major
activities in the reporting period included:
Land-based Works:
Ÿ
Construction
of site office near Ying Tung Estate and Siu Ho Wan Sewage Treatment Works;
Ÿ
Removal
of rock armour above +2.5mPD; and
Ÿ
Reprovision
of Pak Mong Pier.
Marine-based Works:
Ÿ Pipe-piling for ground investigation and wave
protection measures;
Ÿ Marine ground investigation works;
Ÿ Removal of rock armour below +2.5mPD; and
Ÿ Laying of geotextile and sand blanket and ground
improvement works for Deep Cement Mixing (DCM) trial embankment.
A summary of monitoring and audit activities conducted in the reporting
period is listed below:
Air Quality Monitoring 4
sessions
Noise Monitoring 4
sessions
Water Quality Monitoring 8
sessions (starting from the date of marine work commencement, i.e. 13 July
2018)
Environmental Site Inspection 3
sessions
Environmental Management Meeting 1
session
Environmental auditing works, including weekly site inspections of
construction works conducted by the ET, audit of works vessels and audit of
implementation of Dolphin Watching Plan were conducted in the reporting
period. Based on information
including ET¡¦s observations for the reporting period, environmental pollution
control and mitigation measures for the Project were properly implemented.
Snapshots of EM&A Activities in the Reporting
Period
|
|
|
|
|
Drill on Chemical Spill conducted by the Contractor
|
Noise Monitoring conducted by ET
|
Water Quality Monitoring conducted by ET
|
Breaches of
Action and Limit Levels for Air Quality
No exceedance of Action and Limit Levels was recorded for construction
air quality monitoring in the reporting period.
Breaches of
Action and Limit Levels for Noise
No exceedance of Action and Limit Levels was recorded for construction
noise monitoring in the reporting period.
Breaches of
Action and Limit Levels for Water Quality
The water quality monitoring results obtained during the reporting
period generally complied with the corresponding Action and Limit Levels
stipulated in the Baseline Monitoring Report. Relevant investigation and follow-up
actions were conducted according to the EM&A programme when the water
quality in terms of Dissolved Oxygen (DO), Turbidity and Suspended Solids (SS)
exceeded the corresponding Action and Limit Levels. The preliminary investigation findings
suggested that the exceedances were not related to the Project.
Environmental
Complaints, Non-compliance & Summons
There was no environmental complaint, notification of summons or
successful prosecution recorded in the reporting period.
Reporting Change
There was no reporting change in the reporting period.
Upcoming
Works for the Next Reporting Period
Works to be undertaken in the next monitoring period of August 2018
include the following:
Land-based Works:
Ÿ
Construction
of site office near Ying Tung Estate and Siu Ho Wan Sewage Treatment Works;
Ÿ
Removal
of rock armour above +2.5mPD; and
Ÿ
Reprovision
of Pak Mong Pier.
Marine-based Works:
Ÿ Pipe-piling for ground investigation and wave
protection measures;
Ÿ Marine ground investigation works;
Ÿ Removal of rock armour below +2.5mPD;
Ÿ Diversion of existing box
culvert; and
Ÿ Laying of geotextile and sand blanket and ground
improvement works for Deep Cement Mixing (DCM) trial embankment.
Future Key
Issues
Potential environmental impacts arising from the above upcoming
construction activities in the next reporting period of August 2018 are mainly
associated with dust emission from site office construction, noise from barge
and plant operation during normal working hours and restricted hours, elevation
in SS due to sediment loss from geotextile and sand blanket laying of DCM trial,
disturbance to Chinese White Dolphin (CWD) during marine ground investigation
works and DCM trial and waste management for C&D materials.
1
Introduction
Tung Chung New Town Extension (TCNTE) is
one of the major initiatives under the Government's multi-pronged approach to
increase land supply to meet Hong Kong's medium- to long-term needs for
housing, economic and social developments. The Environmental Impact Assessment
(EIA) Report for TCNTE (Register No. AEIAR-196/2016) was approved on 8 April
2016 and the Environmental Permit (EP) No. EP-519/2016, covering the
construction and operation of TCNTE, was granted on 9 August 2016. The EIA
Report and EP cover both Tung Chung East (TCE) and Tung Chung West (TCW).
ERM-Hong Kong, Limited (ERM) is
commissioned to undertake the role of Environmental Team (ET) for the
construction and operation of TCE Project (¡§the Project¡¨) in accordance with
the requirements specified
in the EP, Updated Environmental Monitoring and Audit (EM&A) Manual (),
EIA Report of the TCNTE project () and other relevant statutory requirements.
The
TCE Project (¡§the Project¡¨) comprises the following elements:
1.
Reclamation
of the seabed by a non-dredged method at TCE to form a total of about 130
hectares of land;
2.
Construction
of about 4.9 kilometres of seawalls, with an eco-shoreline, three drainage box
culvert outfalls, three circulation drains and a seawater intake at TCE;
3.
Construction
of a 470-metre (m) long multi-cell drainage box culvert at TCE;
4.
Provision
of infrastructure for Tung Chung Area 58, including construction of a single
two-lane road with a footpath of about 270 m in length and the associated
utility works;
5.
Construction
of roads, footbridges, drainage, sewerage, waterworks, sewage and salt water
pumping stations, fresh water and salt water service reservoirs, and flood
protection measures;
6.
Provision
of new cycle tracks connecting to the existing cycle track network;
7.
Landscaping,
reprovisioning and ancillary works; and
8.
Implementation
of environmental mitigation measures and environmental monitoring and audit
works.
The location of the Project, including the
associated infrastructure works, is shown in Figure 1.1. The construction and the reclamation
related marine works of the Project commenced on 9 and 13 July 2018,
respectively.
This is the Monthly EM&A Report for the Project which summarises the
key findings of the EM&A programme during the reporting period from 9 to 31
July 2018 for the construction works.
The organization structure of the Project is shown in Annex
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
|
|
Civil Engineering and Development Department
|
Senior Engineer
|
Eddie Lam
|
2231 4445
|
|
Engineer
|
Colin Wong
|
2231 4417
|
|
Engineer¡¦s Representative
(AECOM Asia Company Limited)
|
Principal Resident Engineer
|
Frankie Fan
|
9325 0903
|
|
Senior Resident Engineer
|
Robo Lo
|
6622 1130
|
|
Resident Engineer
|
Vincent Leung
|
9800 0448
|
|
Senior Inspector of Works
|
C K Liu
|
9433 6255
|
|
Environmental Team (ET) (ERM-Hong Kong, Limited)
|
ET Leader
|
Jovy Tam
|
2271 3113
|
|
Deputy ET Leader
Deputy ET Leader
|
Raymond Chow
Louis Kwan
|
2271 3114
9275 0975
|
|
Independent Environmental Checker
(IEC)
(Black & Veatch Hong Kong
Limited)
|
IEC
|
Manuel Chua
|
2608
7314
|
|
Deputy IEC
|
Ivan Ting
|
9222
9490
|
|
Contractor (Contract No. NL/2017/03 TCNTE ¡V
Reclamation and Advance Works)
(Build King ¡V SCT Joint Venture)
|
Site Agent
|
Keith Tse
|
9383 6173
|
|
Construction Team Leader
|
Lee Wai Man
|
9481 6024
|
|
Environmental Officer
|
Calvin Sze
|
9205 9277
|
|
|
24-hour Complaint Hotline
|
-
|
9862 2910
|
The programme of the construction is shown in Annex B.
As informed by the Contractor, details of the major works carried out in
this reporting period are listed below:
Land-based Works:
Ÿ
Construction
of site office near Ying Tung Estate and Siu Ho Wan Sewage Treatment Works;
Ÿ
Removal
of rock armour above +2.5mPD; and
Ÿ
Reprovision
of Pak Mong Pier.
Marine-based Works:
Ÿ Pipe-piling for ground investigation and wave
protection measures;
Ÿ Marine ground investigation works;
Ÿ Removal of rock armour below +2.5mPD; and
Ÿ Laying of geotextile and sand blanket and ground
improvement works for Deep Cement Mixing (DCM) trial embankment.
The environmental mitigation implementation schedule
is presented in Annex C.
The status for all environmental aspects are presented in Table 1.2. The EM&A requirements remained
unchanged during the reporting period.
Table 1.2 Summary of Status for the
Environmental Aspects under the Updated EM&A Manual
|
Parameters
|
Status
|
|
Air
Quality
|
|
Baseline Monitoring
|
The results of baseline air quality monitoring for
TCE were reported in Baseline Monitoring Report and submitted to EPD under EP
Condition 3.4
|
|
Impact Monitoring
|
On-going for TCE, monitoring conducted three times
every six days
|
|
|
|
|
Noise
|
|
Baseline Monitoring
|
The results of baseline noise monitoring for TCE were
reported in Baseline Monitoring Report and submitted to EPD under EP
Condition 3.4
|
|
Impact Monitoring
|
On-going for TCE, monitoring conducted once per week
|
|
Impact Monitoring for Road Traffic Noise during
Operational Phase
|
To be conducted during operational phase
|
|
Fixed Noise Commissioning Test
|
To be implemented by the Contractor
|
|
|
|
|
Water
Quality
|
|
Baseline Monitoring
|
The results of baseline water quality monitoring for
TCE were reported in Baseline Monitoring Report and submitted to EPD under EP
Condition 3.4
|
|
Impact Monitoring
|
On-going for TCE, monitoring conducted three times
per week
|
|
|
|
|
Waste
Management
|
|
Waste Monitoring
|
On-going
|
|
|
|
|
Land
Contamination
|
|
Contamination Assessment Plan (CAP), Remediation Action
Plan (RAP) and Remediation Report (RR)
|
Pending environmental site investigation and lab
testing works for TCW
|
|
|
|
|
Ecology
|
|
Monitoring for Compensation Woodland
|
To be conducted when compensation woodland are
planted
|
|
Monitoring for Emergent Plant inside the future
River Park
|
To be conducted in the future River Park
|
|
Monitoring for Translocated Amphibians of
Conservation Importance
|
To be conducted after translocation
|
|
Monitoring for Preserved/Transplanted Plant Species
of Conservation Importance
|
To be conducted after preservation/ transplantation
|
|
Monitoring for Tung Chung Stream EIS and Wong Lung
Hang EIS
|
To be conducted under TCW
|
|
Eco-shoreline Monitoring
|
To be conducted when eco-shoreline at TCE PDA and
Road P1 is built
|
|
Tung Chung Bay and Tai Ho Wan Baseline Monitoring
|
The results of baseline soft shore ecological
monitoring at Tung Chung Bay and Tai Ho Wan were reported in Baseline
Monitoring Report and submitted to EPD under EP Condition 3.4
|
|
Tung Chung Bay and Tai Ho Wan Impact Monitoring
|
Scheduled to be conducted in September
2018
|
|
|
|
|
Landscape
and Visual
|
|
|
Baseline Monitoring
|
The results of baseline landscape and visual
monitoring were reported in Baseline Monitoring Report and submitted to EPD
under EP Condition 3.4
|
|
|
|
|
Site
Environmental Audit
|
|
Regular Site Inspection
|
On-going
|
|
Dolphin Watching Plan implementation measures
|
Under implementation by the Contractor
|
|
Works Vessel Travel Route Plan implementation
measures
|
Under implementation by the Contractor
|
|
Silt Curtain Deployment Plan implementation measures
|
Under implementation by the Contractor
|
|
|
|
|
Spill Response Plan implementation measures
|
Under implementation by the Contractor
|
|
|
|
|
Waste Management Plan implementation measures
|
Under implementation by the Contractor
|
|
|
|
|
Complaint Hotline and Email Channel
|
Under implementation by the Contractor
|
|
Environmental Log Book
|
On-going
|
Taking into account the construction works, impact monitoring of air quality,
noise, water quality and waste management were carried out in the reporting
period. The monitoring schedule of
air quality, noise and water quality monitoring are provided in Annex
E2, Annex F2 and Annex G2, respectively.
The EM&A programme also involved environmental site inspections and
related auditing conducted by the ET for checking the implementation of the
required environmental mitigation measures recommended in the approved EIA
Report. To promote the
environmental awareness and enhance the environmental performance of the
contractors, environmental trainings and regular environmental management
meetings were conducted during the reporting period, which are summarized as
below:
Ÿ One (1) environmental management meeting was held on
20 July 2018;
Ÿ Bi-weekly environmental induction and toolbox trainings
provided by the contractor for the workers.
The status
of statutory environmental compliance with the EP conditions under the EIAO,
submission status under the EP and implementation status of mitigation measures
are presented in Table 1.3.
Table 1.3 Status
of Submissions and Implementation Status of Mitigation Measures under EP
|
EP
Condition
|
Submission
/ Implementation Status
|
Status
|
|
2.1
|
Set up of Community and Professional Liaison Groups
|
Community and Professional Liaison Groups were set
up.
|
|
2.1
|
Complaint Management Plan
|
Accepted by EPD
|
|
2.11
|
Management Organizations
|
Accepted by EPD
|
|
2.12
|
Construction Works Schedule and Location Plans
|
Accepted by EPD
|
|
2.13
|
Works Vessel Travel Route Plan
|
Accepted by EPD
|
|
2.14
|
Eco-shoreline Implementation Plan
|
To be prepared no
later than 3 months before the commencement of construction of the
eco-shoreline at TCE
|
|
2.15
|
Dolphin Watching Plan
|
Accepted by EPD
|
|
2.16
|
Silt Curtain Deployment Plan
|
Accepted by EPD
|
|
2.17
|
Spill Response Plan
|
Accepted by EPD
|
|
2.18
|
Plan on Provision of Buffer Zones
|
To be prepared no later than 3 months before the
commencement of construction works at Tung Chung Valley
|
|
2.19
|
River Park Plan
|
To be prepared no later than 3 months before the
commencement of construction works at Tung Chung Valley
|
|
2.20
|
Habitat Enhancement and Translocation Plan for
Amphibian Species of Conservation Importance
|
To be prepared no later than 3 months before the
commencement of construction works at Tung Chung Valley
|
|
2.21
|
Detailed Preservation and/or Translocation Plan for
Plant Species of Conservation Importance
|
To be prepared no later than 3 months before the
commencement of construction works at Tung Chung Valley
|
|
2.22
|
Detailed Compensatory Woodland Planting Plan
|
To be prepared no later than 3 months before the
commencement of construction works at Tung Chung Valley
|
|
2.23
|
Plan for Review of Use of New Low Noise Road
Surfacing Material(s)
|
To be prepared no later than 3 months before the
commencement of roadworks
|
|
2.24
|
Waste Management Plan
|
Accepted by EPD
|
|
2.25
|
(i) no dredging of marine sediment shall be carried
out for the Project
(ii) all reclamation filling
works shall be carried out within a leading seawall of at least 200m; and
(iii)
silt curtains surrounding the reclamation area shall be deployed in
accordance with the Silt Curtain Deployment Plan
|
Under implementation
Under implementation
Under implementation
|
|
2.26
|
Implement Silt Curtain Deployment Plan and Spill
Response Plan
|
Under implementation
|
|
2.27
|
Implement dolphin exclusion zone of 250m around the
reclamation site at Tung Chung East during the installation of the perimeter
silt curtains and any re-deployment of the perimeter silt curtains by
Qualified Ecologist(s)
|
Under implementation
|
|
2.28
|
Once the perimeter silt curtains are installed or
re-deployed, the Dolphin Watching Plan shall be implemented as part of the
EM&A programme
|
Under implementation
|
|
2.29
|
(i) no underwater blasting and percussive piling
shall be carried out for the Project; and
(ii)
air compressors and other noisy equipment mounted on works vessels shall
be acoustically-decoupled
|
Under implementation
Under implementation
|
|
2.30
|
Implement Works Vessel Travel Route Plan
Implement Eco-shoreline Implementation Plan
Implement Dolphin Watching Plan
|
Under implementation
To be implemented
Under implementation
|
|
2.31
|
Implement Plan on Provision of Buffer Zones, River Park
Plan, Habitat Enhancement and Translocation Plan for Amphibian Species of
Conservation Importance, Detailed Preservation and/or Translocation Plan for
Plant Species of Conservation Importance and Detailed Compensatory Woodland
Planting Plan
|
To be implemented
|
|
2.32
|
Implement Plan for review of the use of new road
surfacing material(s)
Implement Waste Management Plan
|
To be implemented
Under implementation
|
|
2.33
|
Install
noise barriers and low noise road surfacing at the extended Chung Mun
Road and Road D3
All
noise mitigation measures implemented shall be properly maintained during the
operation of the above roads
|
To be implemented
|
|
2.34
|
Implement a deodouriser with an odour removal
efficiency of at least 95% shall be installed, operated and maintained within
each sewage pumping station. The
exhaust of the deodouriser shall be oriented away from sensitive receivers;
and all odourous facilities of each sewage pumping
station shall be enclosed and negative pressure shall be maintained within
the facilities.
|
To be implemented
|
|
2.35
|
Enclose
all the pumps inside a building structure
|
To be implemented
|
|
2.36
|
(i) a
100% standby pumping capacity shall be installed and maintained
(ii) a
50% spare pumping capacity shall be installed and maintained
(iii) dual-feed
power supply shall be installed and maintained; and
(iv) an emergency
facility with a 6-hour storage capacity of average dry weather flow shall be
installed and maintained.
|
To be implemented
To be implemented
To be implemented
To be implemented
|
The environmental licenses and permits, including environmental permit,
waste discharge license, registration as chemical waste producer and
construction noise permit, which are valid in the reporting period are
presented in Annex D. No
non-compliance with environmental statutory requirements was recorded.
2
EM&A Results for Tung Chung East
The EM&A programme for the Project required environmental monitoring
for air quality, noise, 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.
2.1.1
Monitoring
Requirements and Equipment
According to the Updated
EM&A
Manual ()
of the Project, impact air quality monitoring in terms of 1-hour Total Suspended Particulate (TSP)
was conducted three (3) times every six (6) days when the highest dust impact
was expected. The Action and Limit
Levels of the air quality monitoring is provided in Table 2.1 below.
Table 2.1 Action
and Limit Levels for 1-hour TSP
|
Location
|
Action Level, µg/m3
|
Limit Level, µg/m3
|
|
Monitoring station for Tung Chung East
|
279
|
500
|
Portable
direct reading dust meters were used to measure 1-hour TSP levels in
undertaking the air quality monitoring for the Project. The proposed use of portable direct
reading dust meters was submitted to IEC and obtained agreement from the IEC as
stated in Section 5.5 of the Updated EM&A Manual. With the use of direct reading dust
meter, it can allow prompt and direct results for the EM&A reporting and
the implementation of the event and action plan. The portable direct reading dust meter
would be calibrated every year against High Volume Sampler (HVS) to check the validity
and
accuracy of the results measured by direct reading method.
The monitoring location and equipment used in the
impact air quality monitoring programme
are summarized in Table 2.2 and
illustrated in Figure 2.1. Copies of the calibration certificates for
the equipment are presented in Annex
E1, which showed that the portable direct
reading dust meter is capable of providing comparable results with that
provided by a HVS.
Table 2.2 Air
Quality Monitoring Details
|
Monitoring
Station
|
Location
|
Parameter
|
Frequency
and Duration
|
Monitoring
Dates
|
Equipment
|
|
DM-1
|
Tung
Chung Area 56 ¡V Planned Public Rental Housing Development
|
1-hour TSP
|
Three times per six days during
the construction period of the Project
|
13, 19, 25 & 31 July 2018
|
1-hour TSP Dust Meter
SIBATA LD-5R (S/N:
620402)
|
|
Remark:
It should be noted that
impact monitoring at other construction dust monitoring locations at TCE as stated in the Updated EM&A Manual will commence after the flat
intake (for Monitoring Stations DM-2, DM-3 and DM-4).
|
2.1.2
Monitoring
Schedule for the Reporting Month
The schedule for air quality monitoring during the reporting period is
provided in Annex E2.
2.1.3
Results and
Observations
The monitoring results for 1-hour TSP are summarized in Table 2.3. The monitoring data and the graphical
presentation are provided in Annex E3.
Table 2.3 Summary
of 1-hour TSP Monitoring Results in the Reporting Period
|
Monitoring Station
|
Average (µg/m3)
|
Range (µg/m3)
|
Action Level
(µg/m3)
|
Limit Level
(µg/m3)
|
|
DM-1
|
28
|
20-46
|
279
|
500
|
The major dust sources in the reporting period included sand blanket
laying works under the Project as well as nearby traffic emissions.
All the 1-hour TSP results were below the
Action and Limit Levels at the monitoring location in the reporting
period. No action is thus required
to be undertaken in accordance with the Event and Action Plan presented in Annex
E4.
2.2.1
Monitoring
Requirements and Equipment
According to the Updated EM&A Manual ()
of the Project, impact noise monitoring was conducted
once per week during the construction phase of the Project. The Action and Limit Level for
construction noise of the Project is provided in Table 2.4 below.
Table 2.4 Action and Limit Levels
for Construction Noise
|
Time Period
|
Action Level
|
Limit Level
|
|
0700 - 1900 hours on normal weekdays
|
When one documented complaint is received
|
75 dB(A) *
|
Notes:
If works are to be carried out during
restricted hours, the conditions stipulated in the construction noise permit
issued by the Noise Control Authority have to be followed.
* Reduce to 70 dB (A) for schools and 65
dB (A) during school examination periods.
Noise monitoring was performed using sound level meter at the designated
monitoring station NMS-CA-4 (Figure 2.2; Table 2.5) in
accordance with the requirements stipulated in the Updated EM&A Manual. Acoustic calibrator was deployed to
check the sound level meters at a known sound pressure level. Details of the deployed equipment are
provided in Table 2.5. Copies of the calibration certificates
for the equipment are presented in Annex F1.
Table 2.5 Noise
Monitoring Details
|
Monitoring
Station
|
Location
|
Parameter
|
Frequency
and Duration
|
Monitoring
Dates
|
Equipment
|
|
NMS-CA-4
|
Residential
premise in the reclamation area next to Tung Chung East
|
30-minute measurement between 0700 and 1900 on
normal weekdays (Monday to Saturday). Leq, L10 and L90
would be recorded.
|
Once per week for 30 mins
during the construction period of the Project
|
13, 19, 25 & 31 July 2018
|
Sound Level Meter: Rion NL-52 (S/N: 00331805)
Acoustic Calibrator: LARSON DAVIS CAL200 (S/N:
11333)
|
|
Remark:
It should be noted that
impact monitoring at other construction noise monitoring locations at TCE as stated in the Updated EM&A Manual will commence after the flat intake of residential premise in TCE (for Monitoring Stations NMS-CA-1) and operation of schools (for Monitoring Stations NMS-CA-2 and NMS-CA-3).
|
2.2.2
Monitoring
Schedule for the Reporting Month
The schedule for noise monitoring during the reporting period is
provided in Annex F2.
2.2.3
Results and
Observations
Results for noise monitoring are summarized in Table 2.6. The monitoring
data and the graphical presentation are provided in Annex F3.
Table 2.6 Summary
of Construction Noise Monitoring Results in the Reporting Period
|
Monitoring
Station
|
Average , dB(A),
Leq (30mins)
|
Range, dB(A),
Leq (30mins)
|
Limit Level, dB(A),
Leq (30mins)
|
|
NMS-CA-4
|
65.2
|
64.4-66.4
|
75
|
Major noise sources during the noise monitoring included noise from
armour rock removal, and nearby traffic noise and aircraft noise.
No noise Action or Limit Level exceedance was recorded in the reporting
period. No action is thus required
to be undertaken in accordance with the Event and Action Plan presented in Annex
F4.
2.3.1
Monitoring
Requirements and Equipment
Impact water quality monitoring was carried out to ensure that any
deterioration of water quality was detected, and that timely action was taken
to rectify the situation. Impact
water quality monitoring was undertaken three days per week since the
commencement of marine works during the reporting period in accordance with the
Updated EM&A Manual. Each
impact water quality monitoring was scheduled such that the interval between
two impact water quality monitoring was more than 36 hours to record
representative water quality data throughout the week during the marine works.
Two
(2) replicate in-situ measurements
and samples were collected at each monitored water depth of each designated
monitoring stations. Dissolved
Oxygen (DO), pH value, salinity, temperature and turbidity were measured in-situ whereas the level of suspended
solids (SS) were determined by ALS Technichem (HK) Pty
Ltd which is a HOKLAS accredited laboratory.
The Action and Limit Levels of the water quality monitoring are provided
in Table 2.7.
Table 2.7 Action and Limit Levels
for Water Quality
|
Parameters
|
Action Level
|
Limit Level
|
|
DO in mg/L
(Surface, Middle & Bottom)
|
Surface and Middle
5.9 mg/L [1]
Bottom
5.6 mg/L
|
Surface and Middle
4 mg/L [1]
Bottom
2 mg/L
|
|
SS in mg/L (Depth-averaged)
|
13.5 mg/L
or
120% of upstream control station at the same tide of the same day, whichever is higher. [2]
|
23.5 mg/L
or
130% of upstream control station at the same tide of the same day, whichever is higher. [2]
|
|
Turbidity in NTU (Depth-averaged)
|
17.1 NTU
or
120% of upstream control station at the same tide of the same day, whichever is higher. [2]
|
23.5 NTU
or
130% of upstream control station at the same tide of the same day, whichever is higher. [2]
|
Notes:
(1) For
DO, non-compliance occurs when monitoring results is lower than the limits.
(2) For SS and Turbidity,
non-compliance occurs when monitoring results is larger than the limits
The locations of the monitoring stations under the Project
are shown in Figure 2.3 and Table 2.8.
Table 2.8 Locations
of Impact Water Quality Monitoring Stations and the Corresponding Monitoring
Requirements
|
Monitoring
Station
|
Description
|
Coordinates
|
Parameters (1)
|
Frequency
|
Depth
|
|
|
|
Easting
|
Northing
|
|
|
|
TCE-WQM1
|
Near Airport Channel
|
811838
|
817341
|
Ÿ Dissolved Oxygen (DO) (mg/L and % saturation)
Ÿ Temperature (¢XC)
Ÿ Turbidity (NTU)
Ÿ Salinity (ppt)
Ÿ pH
Ÿ Water depth (m)
Ÿ Suspended Solid (SS) (mg/L)
|
Impact monitoring: 3 days per week, at mid-flood and
mid-ebb tides during the construction period of the Project
|
3 water depths: 1m
below sea surface,
mid-depth and 1m
above seabed. If the water depth is less than 3m,
mid-depth sampling only. If water
depth less than 6m, mid-depth may be omitted
|
|
TCE-WQM2a
|
Marine Park 1
|
814439
|
819879
|
|
TCE-WQM2b
|
Marine Park 2
|
814439
|
821905
|
|
TCE-WQM3A (2)
|
Outlet of Tai Ho Wan
|
814705
|
817859
|
|
TCE-WQM4
|
HKBCF
|
813344
|
818849
|
|
TCE-C1
|
Control Station - Outside
Airport Channel
|
804247
|
815620
|
|
TCE-C2
|
Control Station - Sunny Bay
|
819460
|
821473
|
|
Notes:
(1) In addition to the abovementioned parameters, other relevant data shall also
be recorded, including monitoring location / position, time, water depth,
tidal stages, weather conditions and any special phenomena or work underway
at the construction site.
(2) The sampling location was shifted for ~80m north
with coordinates 814680 (Easting) and 817940 (Northing) due to the presence
of nearby work barges since 26 July 2018. The ET was liaising with the
Contractor to obtain information on the expected duration and extent of the
works for further proposal of alternative monitoring location.
|
Table 2.9 summarizes the equipment
used in the impact water quality monitoring
works. Copies of the calibration
certificates are attached in Annex
G1.
Table 2.9 Water Quality Monitoring
Equipment
|
Equipment
|
Model
|
|
Water Sampler
|
Kahlsico Water Samplers
|
|
Multi-parameter Water
Quality System (measurement of DO,
Temperature, Turbidity, Salinity and pH) (Note 1)
|
YSI ProDSS (S/N: 16H104233;
S/N: 16H104234; S/N: 17E100747; S/N: 17H105557)
YSI 6920 v2 (S/N: 0001C6A7; S/N: 000109DF)
|
|
Note 1: Two of the
multi-parameter water quality systems were used at each monitoring station
during each survey day.
|
2.3.2
Monitoring Schedule
for the Reporting Month
The schedule for water quality monitoring during the reporting period is
provided in Annex G2.
2.3.3
Results and
Observations
A total of 8 monitoring events for impact water quality monitoring were
conducted at all designated monitoring stations from 13 to 31 July 2018 since
the commencement of marine works.
Impact water quality monitoring results and graphical presentations are
provided in Annex G3.
Action level exceedances were recorded for water
quality impact monitoring in the reporting period. Investigations on the action level
exceedances were conducted and summarized in Table 2.10 below.
Table
2.10 Details
of Exceedances Recorded for Water Quality Monitoring
|
Group
|
Date
|
Tide
|
Parameter
|
Station
|
Type
|
Remarks
|
|
1
|
14 Jul 2018
|
ME
|
DO(B)
|
TCE-WQM1
|
Action
|
The
exceedances were not considered as caused by the construction of the Project
due to the following reasons:
Ÿ Areas of reclamation
related marine works undertaken under the Project were surrounded by
perimeter silt curtain, which was observed to be in good condition and
functioning well.
Ÿ The DO levels
at corresponding control/upstream station TCE-C1/TCE-C2 was similar or lower
than the Action Level during the same tide.
Ÿ According to
EPD Routine Monitoring data collected from 2007-2016, similar DO levels were
recorded at the monitoring stations in Northwestern Water Control Zone.
Ÿ These
exceedances of DO levels were all above Water Quality Objective (WQO) (i.e.
limit levels).
Ÿ During summer
season, the marine water experienced temperature and salinity stratification,
where layers of water build up with different levels of temperature and
salinity which prevent mixing of water masses, leading to hypoxia (low oxygen
levels) at the sea bottom.
|
|
|
|
ME
|
DO
|
TCE-WQM2a
|
Action
|
|
|
|
ME
|
DO
|
TCE-WQM2b
|
Action
|
|
|
|
ME
|
DO
|
TCE-WQM3A
|
Action
|
|
|
|
ME
|
DO
|
TCE-WQM4
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM1
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2a
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2b
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM3A
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM4
|
Action
|
|
|
17 July 2018
|
ME
|
DO
|
TCE-WQM1
|
Action
|
|
|
|
ME
|
DO
|
TCE-WQM2a
|
Action
|
|
|
|
ME
|
DO
|
TCE-WQM2b
|
Action
|
|
|
|
ME
|
DO
|
TCE-WQM3A
|
Action
|
|
|
|
ME
|
DO(B)
|
TCE-WQM4
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM1
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2a
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2b
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM3A
|
Action
|
|
|
|
MF
|
DO(S&M)
|
TCE-WQM4
|
Action
|
|
|
19 July 2018
|
ME
|
DO(B)
|
TCE-WQM2a
|
Action
|
|
|
|
ME
|
DO
|
TCE-WQM2b
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2a
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2b
|
Action
|
|
|
21 July 2018
|
ME
|
DO(B)
|
TCE-WQM2a
|
Action
|
|
|
|
MF
|
DO(B)
|
TCE-WQM2a
|
Action
|
|
|
|
MF
|
DO(B)
|
TCE-WQM2b
|
Action
|
|
|
24 July 2018
|
MF
|
DO(B)
|
TCE_WQM1
|
Action
|
|
|
|
MF
|
DO(B)
|
TCEWQM2b
|
Action
|
|
|
26 July 2018
|
MF
|
DO(B)
|
TCE-WQM2b
|
Action
|
|
|
28 July 2018
|
ME
|
DO(S&M)
|
TCE-WQM2b
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2b
|
Action
|
|
|
31 July 2018
|
MF
|
DO(B)
|
TCE-WQM1
|
Action
|
|
|
|
MF
|
DO
|
TCE-WQM2b
|
Action
|
|
|
|
|
|
|
|
|
|
2
|
14 Jul 2018
|
ME
|
Turbidity
|
TCE-WQM2b
|
Action
|
The
exceedances were not considered as caused by the construction of the Project
due to the following reasons:
Ÿ Areas of reclamation
related marine works undertaken under the Project were surrounded by
perimeter silt curtain, which was observed to be in good condition and
functioning well.
Ÿ The monitoring
station is located further away from the Project works area and no action /
limit level exceedances were recorded at the monitoring stations located
closer to the works area (e.g. TCE-WQM2a) during the same monitoring event.
Ÿ The monitoring
conducted on 14 July 2018 was under adverse weather (rainstorm). Surface runoff from the nearby land
mass (e.g. Tai Mo To) to the sea might be resulted due to heavy rain, thus
increasing the turbidity/ SS of the water.
|
|
|
|
MF
|
Turbidity
|
TCE-WQM2b
|
Action
|
|
|
|
ME
|
SS
|
TCE-WQM2b
|
Action
|
|
|
|
MF
|
SS
|
TCE-WQM2b
|
Action
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3
|
14 Jul 2018
|
MF
|
SS
|
TCE-WQM1
|
Action
|
The
exceedances were not considered as caused by the construction of the Project
due to the following reasons:
Ÿ Areas of
reclamation related marine works undertaken under the Project were surrounded
by perimeter silt curtain, which was observed to be in good condition and
functioning well.
Ÿ The monitoring
was conducted during adverse weather on 14 July 2018. Surface runoff from the
nearby land mass (e.g. Tai Ho Wan, near airport channel) to the sea might be
resulted due to heavy rain, thus increasing the suspended solids of the
water.
|
|
|
|
MF
|
SS
|
TCE-WQM3A
|
Action
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4
|
24 July 2018
|
MF
|
SS
|
TCE-WQM3A
|
Action
|
The
exceedances were not considered as caused by the construction of the Project
due to the following reasons:
Ÿ During site inspection on
25 July 2018, the perimeter silt
curtain was found in good condition and functioning well.
Ÿ Site
observations confirmed no silt plumes or observable issues during marine
works (pipe-piling and laying of geotextile and sand blanket for DCM trial).
|
|
|
|
|
|
|
|
|
|
5
|
26 July 2018
|
ME
|
SS
|
TCE-WQM2b
|
Action
|
The
exceedances were not considered as caused by the construction of the Project
due to the following reasons:
Ÿ During site inspection on
27 July 2018, the perimeter silt
curtain was found in good condition and functioning well.
Ÿ Site
observations confirmed no silt plumes or observable issues during marine
works (pipe-piling and laying of geotextile and sand blanket for DCM trial).
Ÿ After checking
site record, it is confirmed that no construction works were carried out near
monitoring station TCE-WQM3A during the monitoring day.
|
|
|
|
ME
|
SS
|
TCE-WQM3A
|
Action
|
|
|
|
MF
|
Turbidity
|
TCE-WQM2b
|
Action
|
|
|
|
MF
|
SS
|
TCE-WQM1
|
Action
|
|
|
|
MF
|
SS
|
TCE-WQM2a
|
Action
|
|
|
|
MF
|
SS
|
TCE-WQM3A
|
Action
|
|
ME: Mid-ebb;
MF: Mid-flood
DO(B):
Bottom-depth DO; DO (S&M): Surface and middle-depth averaged DO
|
|
|
Based on the
preliminary investigation with the ER, the Contractor and the IEC, there is no
evidence showing the exceedances were related to the Project. Nevertheless,
the Contractor was reminded to implement all relevant mitigation measures for
the marine works, including regular checking of silt curtain integrity and
maintain good site practice. The ET
will keep on checking monitoring data, plant, equipment and Contractor¡¦s
working methods. The ET will also
conduct further investigation, including the review of water quality monitoring
data from adjacent projects, to substantiate the exceedances were not considered
as caused by the construction of the Project.
No impact soft shore ecological monitoring at Tung Chung Bay and Tai Ho
Wan was scheduled during the reporting period. The impact soft shore ecological
monitoring at Tung Chung Bay and Tai Ho Wan is scheduled to be conducted in
September 2018 in accordance with the Updated EM&A Manual.
Site
inspections were carried out on a weekly basis to monitor the implementation of
proper environmental pollution control and mitigation measures under the
Project. In the reporting period,
three (3) site inspections were carried out on 12, 20 and 26 July 2018.
Key
observations during the site inspections are summarized in Table 2.11.
Table 2.11 Key Observations
Identified during the Site Inspection in this Reporting Month
|
Inspection
Date
|
Environmental
Observations
|
Recommendations/
Remarks
|
|
12
July 2018
20 July 2018
26
July 2018
|
WA1 (Near Ying Tung Estate)
Ÿ Drill on the
ground
Ÿ Chemical on
the ground
Ÿ Empty chemical
container (without label)
Ÿ Housekeeping
Ÿ Chemical
storage
Vessel Gammon NO66
Ÿ Stagnant Water
Ÿ Chemical in
the restroom
Vessels TB232 and B142172
Ÿ Chemical
container (in doubt) without label
Ÿ Dolphin
Watcher List on board was not related to the Project
Ÿ Chemical
without drip tray
To Kau Wan (DCM Plant)
Ÿ Stagnant water
in the drip tray
Ÿ Paint
(Chemical) without drip tray
Ÿ Empty chemical
container without label
Ÿ Chemical
without label and drip tray
Ÿ Chemicals
without drip tray
|
WA1 (Near Ying Tung Estate)
Ÿ The contractor
was suggested to cover the ground by canvas, then put such drill on the
canvas in order to avoid soil contamination by chemical (e.g. lubricant);
Ÿ The contractor
was reminded to store chemicals properly;
Ÿ The contractor
was reminded to remove chemical waste properly off the site, and use
chemicals with proper labels;
Ÿ The contractor
was reminded to clear debris regularly;
Ÿ The contractor
was reminded to place chemicals properly on the drip tray.
Vessel Gammon NO66
Ÿ The Contractor
was reminded to clear such water, or spray larvicide oil on to it;
Ÿ The contractor
was reminded to store chemicals properly.
Vessels TB232 and B142172
Ÿ The contractor
should attach a label to the container;
Ÿ The contractor
should remove the old list and attach the new one;
Ÿ The contractor
should place the chemical on a drip tray.
To Kau Wan (DCM Plant)
Ÿ The contractor
was reminded to remove water in the drip tray;
Ÿ The contractor
was reminded to properly store chemicals with drip tray;
Ÿ The contractor
was reminded to provide chemical labels, and discard chemical waste properly;
Ÿ The contractor
was reminded to provide proper labels and drip trays for chemicals;
Ÿ The contractor
was reminded to provide drip tray for chemical storage.
|
The Contractor has rectified all of the observations identified during
environmental site inspections in the reporting period.
The Contractor has registered as chemical waste producer under the Contract. Sufficient numbers of receptacles were
available for general refuse collection and sorting.
All dump trucks engaged on site was equipped with GPS during the
reporting period. Illegal dumping
and landfilling of C&D materials were not recorded during the reporting
period.
As informed by the Contractor, wastes generated during this reporting
period include mainly non-inert construction wastes. Reference has been made to the waste
flow table prepared by the Contractor.
The quantities of different types of wastes are summarised in Table 2.12.
Table 2.12 Quantities of
Different Waste Generated in the Reporting Period
|
Month/
Year
|
Inert C&D Materials (a)
(m3)
|
Imported Fill (m3)
|
Inert Construction Waste Re-used
(m3)
|
Non-inert Construction Waste (b)
(m3)
|
Recyclable Materials (c) (kg)
|
Chemical Wastes (kg)
|
|
|
|
9 to 31 Jul 18
|
0
|
0
|
0
|
20.7
|
0
|
0
|
|
|
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, felled trees and others.
|
|
2.7
Implementation Status of Environmental Mitigation
Measures
A summary of the Environmental Mitigation Implementation Schedule is
presented in Annex C.
The necessary mitigation measures were implemented properly for the
Project.
Results for 1-hour TSP and construction noise monitoring complied with
the Action/ Limit levels in the reporting period. No Project-related Action/ Limit level
exceedances were recorded for water quality after investigation.
Cumulative statistics on exceedances is provided in Annex H.
There was no environmental complaint, notification of summons or
successful prosecution recorded in the reporting period.
Statistics on complaints, notifications of summons, successful
prosecutions are summarised in Annex H.
3
Future Key Issues
As informed by the Contractor, the major works for the Project in August
2018 will be:
Land-based Works:
Ÿ
Construction
of site office near Ying Tung Estate and Siu Ho Wan Sewage Treatment Works;
Ÿ
Removal
of rock armour above +2.5mPD; and
Ÿ
Reprovision
of Pak Mong Pier.
Marine-based Works:
Ÿ Pipe-piling for ground investigation and wave
protection measures;
Ÿ Marine ground investigation works;
Ÿ Removal of rock armour below +2.5mPD;
Ÿ Diversion of existing box
culvert; and
Ÿ Laying of geotextile and sand blanket and ground
improvement works for Deep Cement Mixing (DCM) trial embankment.
3.2
Key Issues for the Coming
Month
Potential environmental impacts arising from the above upcoming
construction activities in the next reporting period of August 2018 are mainly
associated with dust emission from site office construction, noise from barge
and plant operation during normal working hours and restricted hours, elevation
in SS due to sediment loss from geotextile and sand blanket laying of DCM
trial, disturbance to Chinese White Dolphin (CWD) during marine ground
investigation works and DCM trial and waste management for C&D materials.
The tentative schedules for environmental monitoring in August
2018
are provided in Annex I.
4
Conclusion and Recommendation
This EM&A Report presents the findings of the
EM&A activities undertaken during the period from 9 to 31 July 2018 in
accordance with the Updated EM&A Manual and the requirements of the Environmental Permit (EP-519/2016).
Air quality (1-hour TSP), noise and water quality (DO,
turbidity and SS) monitoring were carried out in the reporting period. Results for air quality and noise
monitoring complied with the Action and Limit levels in the reporting
period. No Project-related Action/
Limit level exceedances were recorded for water quality after preliminary
investigation.
Environmental site inspection was carried out during the reporting
period. Recommendations on remedial
actions were given to the Contractor for the deficiencies identified during the
site inspection.
There was no environmental complaint, notification of summons or
successful prosecution recorded in the 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.
