Environmental
Monitoring Works
Key
Information in the Reporting Month
Key
Construction Work in the reporting month & the next reporting month
Construction
Activities undertaken during the Reporting Month
Status of Environmental
Licences, Notification and Permits
Monitoring
Parameters and Frequency
Monitoring Methodology and
QA/QC Procedure
Monitoring Parameters and
Frequency
Sampling Management and
Supervision
Post-Translocation Coral
Monitoring
Alert, Alarm and Action
Levels
Mitigation Measures for Cultural Heritage
8. LANDSCAPE AND VISUAL IMPACT REQUIREMENTS
Monitoring Parameters and
Frequency
Monitoring Equipment noise
mitigation
Implementation Status of
Environmental Mitigation Measures
12. ENVIRONMENTAL NON-CONFORMANCE
Summary of Environmental
Complaint
Summary of Environmental
Summon and Successful Prosecution
Key Issues for the Coming
Month
14. CONCLUSIONS AND RECOMMENDATIONS
lIST OF TABLES
Table I Non-compliance
(exceedance) Recorded for the Project in the Reporting Month
Table II Key Information in the Reporting Month
Table III Summary Table for Complaint Details in the Reporting Month
Table IV Summary Table for Key Construction Work in the Reporting
Month
Table V Summary
Table for Site Activities in the next Reporting Period
Table 2.1 Key Project Contacts
Table 2.2 Summary Table for Major Site Activities in the Reporting
Month
Table 2.4 Summary of the Status of Environmental Licences, Notification and Permits
Table 3.1 Locations for Air Quality Monitoring
Table 3.2 Air Quality Monitoring Equipment
Table 3.3 Impact Dust Monitoring Parameters, Frequency and Duration
Table 3.4 Major Dust Source during Air Quality Monitoring
Table 4.1 Noise Monitoring Stations
Table 4.2 Noise Monitoring Equipment
Table 4.3 Noise Monitoring Parameters, Frequency and Duration
Table 4.4 Major Noise Source during Noise Monitoring
Table 4.5 Baseline Noise Level and Noise Limit Level for Monitoring
Stations
Table 4.7 Baseline Noise Level and Noise Limit Level for Monitoring
Stations (Night-time)
Table 5.1 Not Used
Table 5.2 Marine Water Quality Monitoring Stations
Table 5.3 Water Quality Monitoring Equipment
Table 5.4 Water Quality Monitoring Parameters and Frequency
Table 5.5 Methods for Laboratory Analysis for Water Samples
Table 5.6 Not Used
Table 7.1 Cultural Heritage Monitoring Equipment
Table 7.2 AAA Levels for Monitoring for Cultural Heritage
Table 9.1 Landfill Gas Monitoring Equipment
Table 13.1 Summary Table for Site Activities in the next Reporting Period
lIST OF
FIGUREs
Figure 1a Site Portions under Works Contract No. NE/2015/01 (Lam Tin
Side)
Figure 1b Site Portions under Works Contract No. NE/2015/01 (Tseung
Kwan O Side)
Figure 1c Site Portions under Works Contract No. NE/2015/02
Figure 1d Site Portions under Works Contract No. NE/2015/03
Figure 1e Site Portions under Works Contract No. NE/2017/01
Figure 1f Site Portions under Works Contract No. NE/2017/01
Figure 1g Site Portions under Works Contract No. NE/2017/02
Figure 1h Site Portions under Works Contract No. NE/2017/02
Figure 2 Locations of Air Quality Monitoring Stations
Figure 3 Locations of Construction Noise Monitoring Stations
Figure 4 Not Used
Figure 5 Locations of Marine Water Quality Monitoring Stations
Figure 6 Locations of Landfill Gas Monitoring
Figure 7 Location of Post-translocation Coral Monitoring
Figure 8 Location of Monitoring for Cultural Heritage
Figure 9 Not Used
lIST OF
APPENDIces
Appendix
A
Action and Limit Levels
Appendix
B
Copies of Calibration Certificates
Appendix
C
Weather Information
Appendix
D
Environmental Monitoring Schedules
Appendix
E
1-hour TSP Monitoring Results and
Graphical Presentations
Appendix
F
24-hour TSP Monitoring Results and
Graphical Presentations
Appendix
G
Noise Monitoring Results and
Graphical Presentations
Appendix
H
Not Used
Appendix
I
Marine Water Quality Monitoring
Results and Graphical Presentations
Appendix J
Not Used
Appendix K
Summary of Exceedance
Appendix L
Site Audit Summary
Appendix M Event and
Action Plans
Appendix N Implementation Schedule And Recommended Mitigation Measures
Appendix O Summaries of Environmental
Complaint, Warning, Summon and Notification of Successful Prosecution
Appendix P
Waste Generation in the Reporting
Month
Appendix Q Tentative Construction Programme
Appendix
R
Record of Landfill Gas Monitoring by Contractor
Appendix
S
Not Used
Appendix T
Cultural
Heritage Monitoring Results
Appendix
U
Not Used
Appendix
V
Surface Runoff Management Plan
1. This is the 55th Environmental
Monitoring and Audit (EM&A) Report prepared by Cinotech Consultants Limited
for the “Agreement No. CE 59/2015 (EP) Environmental Team for Tseung Kwan O –
Lam Tin Tunnel – Design and Construction” (hereinafter called “the
Project”). This report documents the
findings of EM&A Works conducted in May 2021.
2. During the reporting month, the following
works contracts were undertaken:
·
Contract
No. NE/2015/01 – Tseung Kwan O – Lam Tin Tunnel – Main Tunnel and Associated
Works;
·
Contract
No. NE/2015/02 – Tseung Kwan O – Lam Tin Tunnel – Road P2 and Associated Works;
· Contract No. NE/2015/03 – Tseung Kwan O – Lam
Tin Tunnel – Northern Footbridge;
· Contract No. NE/2017/01 – Tseung Kwan O – Lam
Tin Tunnel –Tseung Kwan O Interchange and Associated Works
· Contract No. NE/2017/02 – Tseung Kwan O – Lam
Tin Tunnel – Road P2/D4 and Associated Works.
· Contract No. NE/2017/06 – Tseung
Kwan O – Lam Tin Tunnel – Traffic Control and Surveillance System(TCSS) and
Associated Works
· Contract No. NE/2017/07 – Cross Bay
Link, Tseung Kwan O – Main Bridge and Associated Works.
3. Environmental monitoring for the Project
was performed in accordance with the EM&A Manual and the monitoring results
were checked and reviewed. Site Inspections/Audits were conducted once per
week. The implementation of the environmental mitigation measures, Event Action
Plans and environmental complaint handling procedures were also checked.
4. Summary of the non-compliance
(exceedance) in the reporting month for the Project is tabulated in Table I.
Table I Non-compliance (exceedance) Record for the Project in the Reporting Month
|
Environmental Monitoring |
No. of Non-compliance (Exceedance) |
No. of Non-compliance (Exceedance) due to Construction Activities of this Project |
Action Taken |
||
|
Action Level |
Limit Level |
Action Level |
Limit Level |
||
|
Air Quality |
0 |
0 |
0 |
0 |
N/A |
|
Noise |
2 |
1 |
1 |
0 |
Refer to Appendix K &
O |
|
Marine Water Quality |
32 |
112 |
0 |
0 |
Refer to Appendix K |
|
Groundwater Level
Monitoring (Piezometer Monitoring) |
0 |
N/A1 |
0 |
N/A1 |
N/A |
|
Ecological |
N/A |
N/A |
N/A |
N/A |
N/A |
|
Cultural Heritage |
0 |
0 |
0 |
0 |
N/A |
|
Landfill Gas |
0 |
0 |
0 |
0 |
N/A |
Note:(1) No Limit Level for Groundwater Level Monitoring (Piezometer
Monitoring).
Air Quality Monitoring
5. No Action/Limit Level exceedance for
1-hour TSP monitoring was recorded.
6. No Action/Limit Level exceedance for
24-hour TSP monitoring was recorded.
Construction Noise Monitoring
7. One (1) Action Level exceedances were
recorded due to documented project-related complaints received in this
reporting month. The Summary of Documented Complaints in Reporting Month is
tabulated in Table III.
8. No project-related Limit Level
exceedance for construction noise monitoring were recorded in the reporting
month.
Water Quality Monitoring
9. Groundwater quality monitoring had been
suspended since October 2019 upon the agreement by EPD. Further
details should be founded at Section 5.1.
10. All marine water quality monitoring was
conducted as scheduled in the reporting month. There were thirty-two (32) Action Level and
one-hundred-and-twelve (112) Limit Level exceedances
recorded in Monitoring Stations (M) during marine water quality monitoring. During this reporting month, no sand plume
was observed during the water quality monitoring and site audits, therefore
there is no direct evidence that the recent exceedances were due to the construction
works of the Project. Details of this investigation are presented in Section 5. Daily silt curtain
inspection and weekly diving inspection have been carried out by contractor,
the record, as reviewed by the site auditors, indicated that silt curtains were
found in good conditions.
11. Construction phase daily piezometer
monitoring by the Contractor commenced in June 2018. It has switched to monthly
basis since 3 October
2018 as the construction activity was 120m away from the piezometer gate. No
monitoring was conducted in the reporting month.
Ecological Monitoring
12. Post-translation coral monitoring
survey shall be conducted once every 3 months for a period of 12 months after
completion of coral translocation. The post-translocation coral monitoring
surveys were completed in November 2017.
Monitoring on Cultural Heritage
13. Monitoring of impacts on Cultural
Heritage at Cha Kwo Ling Tin Hau Temple commenced in May 2017. No Alert, Alarm and Action (AAA) Level
exceedance was recorded in the reporting month.
Landscape and Visual Monitoring and
Audit
14. The implementation of landscape and
visual mitigation measures was checked during the environmental site
inspections. Recommended follow-up actions have been discharged by the
Contractor. Details of the audit findings
and implementation status are presented in Section 10.
Landfill Gas Monitoring
15. Monitoring of landfill gases
commenced in December 2016 and were
carried out by the Contractor at excavation
location, Portion III. No Limit Level exceedance was
recorded.
Environmental Site Inspection
16. Joint weekly site inspections were
conducted by representatives of the Contractor, Engineer and Environmental
Team. The representative of the IEC joined the site inspection for NE/2015/01 and
NE/2017/07 on 14 April 2021 & NE/2015/02, NE/2017/01, NE/2017/02 and NE/2017/06
on 15 April 2021 respectively. Details of the audit
findings and implementation status are presented in Section 10.
Waste Management
17. Wastes generated from this Project include inert construction and demolition (C&D) materials, non-inert C&D materials and marine sediment. Details of waste management data is presented in Section 11 and Appendix P.
18. Summary of key information in the
reporting month is tabulated in Table II
Table II Key Information in the
Reporting Month
|
Monthly Complaints |
Event Details |
Action Taken |
Status |
|
|
Number |
Nature |
|||
|
May 2021 |
3 |
Air / Noise |
Details refer to App O |
Draft CIRs submitted /
On-going |
|
April 2021 |
13*1 |
Noise |
Details refer to App O |
Closed/ Draft CIRs
submitted/ On-going |
|
March 2021 |
18*2 |
Noise |
Details refer to App O |
Draft CIRs submitted /
On-going |
|
February 2021 |
3 |
Noise |
Details refer to App O |
Closed/ Draft CIRs
submitted/ On-going |
|
January 2021 |
13 |
Noise / Air |
Details refer to App O |
On-going /Closed |
|
December 2020 |
13 |
Noise / Operating hours |
Details refer to App O |
Draft CIRs submitted /
Closed |
|
November 2020 |
14 |
Air / Noise |
Details refer to App O |
Closed |
|
Notifications of any summons & prosecutions received |
0 |
--- |
N/A |
N/A |
*1: 1 complaint at April 2021 was received at early May
2021.
*2: 4 new complaints in March 2021 was received by
Environmental Team in April 2021.
19. Summary of complaints received in
the reporting month is tabulated in Table
III.
Table
III Summary of Complaints Details in
Reporting Month
|
Complaint No. |
Complaint |
Investigation Findings |
Follow-up Action /
Mitigation Measure |
|
Tseung Kwan O Side |
|||
|
550 |
Noise
nuisance at early Morning (C2&C3 – May 2021) |
Investigation
finding shows that no PME and construction works were conducted at the time
of complaint. The complaint is considered as non-project-related and details
shall be referred to CIR-N139. |
NIL |
|
551 &553 |
Air Quality
Impact nearby Po Yap Road (C3 – April & May 2021) |
The complaint
is considered as project-related. The Contractor had sprinkled water and
covered stockpile of dusty materials to suppress dust impact. The details
shall be referred to CIR-A21. |
The
Contractor has applied tarpaulin fabric to the fence to reduce dust impact
towards the climbing wall at Tiu Keng Leng Sport Centre. |
|
Lam Tin Side |
|||
|
552 |
Noise Nuisance
from Construction Works (C1 – May 2021) |
Investigation
undergoing |
|
20. Summary of key construction work in
the reporting month is tabulated in Table
IV.
Table IV Summary Table for Key Construction
Work in the Reporting Month
|
Contract No. |
Project Title |
Site Activities (May 2021) |
|
|
NE/2015/01 |
Tseung Kwan O – Lam Tin
Tunnel – Main Tunnel and Associated Works |
Lam Tin Interchange |
1)
EHC2 U-Trough 2)
Site Formation – Area 1G1, Area 1G2, Area 2 &
Area 5 3)
Site Formation – Slope stabilization & Retaining
Wall 4)
Aministration Building, West Ventilation Building
& Bridge Construction 5)
Stormwater Tank & Pumping Station Construction 6)
S01_2, EHC1&4 Construction 7)
CKLR Underground Utilities 8)
Landscape Deck |
|
Main Tunnel |
9)
S02_2 Excavation 10) Main Tunnel
Lining Works |
||
|
TKO Interchange |
11) Bridge
Construction 12) East Ventilation
Building |
||
|
NE/2015/02 |
Tseung Kwan O – Lam Tin
Tunnel – Road P2 and Associated Works |
1)
Sloping Seawall Construction 2)
Construction of Underpass at CH821-CH105 3)
Construction of Underpass at CH105-CH318 4)
Construction of Seawall Coping 5)
Construction of Road P2 and SR2 |
|
|
NE/2015/03 |
Tseung Kwan O – Lam Tin Tunnel – Northern Footbridge |
The construction
works under the contract had been completed in December 2019. The EM&A
works were terminated in late April 2020. |
|
|
NE/2017/01 |
Tseung Kwan O – Lam Tin Tunnel – Tseung Kwan O
Interchange and Associated Works |
1)
Construction of
Pier 2)
Construction of
Pier Head Works 3)
Construction of Pile Cap 4)
Segment Erection Works 5)
Installation of Parapet Skin |
|
|
NE/2017/02 |
Tseung Kwan O – Lam Tin
Tunnel – Road P2/D4 and Associated Works |
1)
Inspection pit excavation and utility diversion
works 2)
Construction of drainage and watermain 3)
Asphalt Paving 4)
Pier, Staircase and Lift Shalt Construction 5)
Road Works |
|
|
NE/2017/06 |
Tseung Kwan O – Lam Tin Tunnel – Traffic Control and
Surveillance System(TCSS) and Associated Works |
1)
System Integration Test 2)
Installation works at Admin Building 3)
Goods arrival & storage on site |
|
|
NE/2017/07 |
Cross Bay Link, Tseung Kwan O – Main Bridge and
Associated Works |
1)
Predrilling
Work at Portion I had completed with 26 out of 35 numbers 2)
Precast Shell
Installation 3)
1st Stage
Concrete for pile caps 4)
Precast Pier
Installation 5)
2nd Stage
Concrete for pile caps 6)
Precast Box
Girder Installation 7)
E&M Work
and External Work at Portion V 8)
Fabrication of
deck segment panels steel 9)
Round deck
segment assembly 10)
Fabrication of
arch rib panels steel 11)
Round arch rib
segment assembly 12)
Load-out and
Transportation of Steel Main Bridge 13)
Load-out,
Transportation and Floating-in of Steel Bridge |
|
21. The future key environmental issues
in the coming month include:
Table V Summary Table for Site Activities in the next Reporting Period
|
Contract No. and Project Title |
Site Activities (June 2021) |
Key Environmental Issues * |
|
|
NE/2015/01 -
Tseung Kwan O – Lam Tin Tunnel – Main Tunnel and Associated Works |
Lam Tin
Interchange |
1)
EHC2 U-Trough 2)
Site Formation – Area 1G1, Area 1G2, Area 2 &
Area 5 3)
Site Formation – Slope stabilization & Retaining
Wall 4)
Administration Building, West Ventilation Building
& Bridge Construction 5)
Stormwater Tank and Pumping Station Construction 6)
S01_2, EHC1&4 Construction 7)
CKLR Underground Utilities 8)
Landscape Deck |
(A) / (B) / (C) /
(D) / (E) / (G) |
|
Main Tunnel |
9)
S02_2 Excavation 10) Main Tunnel
Lining Works |
(B) |
|
|
TKO Interchange |
11) Bridge
Construction 12) East Ventilation
Building |
(A) / (C) / (D) /
(E) / (F) / (I) |
|
|
NE/2015/02 -
Tseung Kwan O – Lam Tin Tunnel – Road P2 and Associated Works |
1)
Sloping Seawall Construction 2)
Construction of Underpass at CH821-CH105 3)
Construction of Underpass at CH105-CH318 4)
Construction of Seawall Coping 5)
Construction of Road P2 and SR2 |
(A) / (B) / (C) /
(D) / (E) / (G) / (I) |
|
|
NE/2015/03 -
Tseung Kwan O – Lam Tin Tunnel – Northern Footbridge |
The construction works under the contract had been completed
in December 2019. Materials are being removed from works area. |
N/A |
|
|
NE/2017/01 –
Tseung Kwan O Interchange and Associated Works |
1)
Construction of
Pier 2)
Construction of
Pier Head works 3)
Segment
erection works 4)
Construction of Bridge Decks 5)
Installation of Parapet Skin |
(A) / (B) / (E) /
(F) / (G) |
|
|
NE/2017/02
–Tseung Kwan O - Lam Tin Tunnel - Road P2/D4 and Associated Works |
1)
Inspection pit excavation and utility diversion
works 2)
Construction of drainage and watermain 3)
Asphalt Paving 4)
Pier, Staircase and Lift Shalt Construction 5)
Road Works |
(A) / (B) / (E) /
(F) / (G) |
|
|
NE/2017/06 –
Tseung Kwan O – Lam Tin Tunnel – Traffic Control and Surveillance
System(TCSS) and Associated Works |
1)
System Integration Test 2)
Goods arrival & storage on site 3)
Installation in Admin Building 4)
Installation in Tunnel Building |
(E) |
|
|
NE/2017/07 -
Cross Bay Link, Tseung Kwan O – Main Bridge and Associated Works |
1)
Fabrication
work for precast pier 2)
Preparation for
Rolling out for Precast Box Girder 3)
Jointing deck
segments 4)
Dismantle of
temporary support towers and loading out steel main bridge to barge 5)
Preparation of
temporary support tower 6)
Fabrication of
Precast Segment and Precast Shell 7)
Pre-drilling 8)
Bored piling |
(A) / (B) / (D) /
(E) / (F) / (G) / (H) / (I) |
|
Note:
(A)
Watering for dust generation
from haul road, stockpiles of dusty materials, exposed site area, excavation
works and rock breaking activities;
(B)
Noisy construction activity
such as rock-breaking activities and piling works;
(C)
Runoff from exposed slope or
site area;
(D)
Wastewater and runoff
discharge from site;
(E)
Accumulation of silt, mud
and sand along U-channels and sedimentation tanks;
(F)
Set up and implementation of
temporary drainage system for the surface runoff;
(G)
Storage of chemicals/fuel
and chemical waste/waste oil on site;
(H)
Accumulation and storage of
general and construction waste on site; and
(I)
Marine water quality impact and indirect impact to coral
communities due to marine construction for TKO-LTT reclamation
1.1
Cinotech
Consultants Limited (Cinotech) was commissioned by Civil Engineering and Development Department
(CEDD) as the Environmental Team (ET) to undertake environmental monitoring
and auditing services for the Works Contracts involved in the implementation of
Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) project to ensure that the environmental performance of the Works
Contracts comply with the requirements specified in the Environmental Permit
(EP), Environmental Monitoring & Audit (EM&A) Manual, Environmental
Impact Assessment (EIA) Report of the TKO-LTT project and other relevant statutory
requirements. This is the 55th
Monthly EM&A report summarizing the EM&A works for the Project in May
2021.
1.2
This
is the 55th Monthly EM&A Report which summarises the impact
monitoring results and audit findings for the EM&A programme during the
reporting period in May 2021.
1.3
The
structure of the report is as follows:
Section 1: Introduction – purpose and structure of the report.
Section 2: Contract Information
– summarises background and scope of the Contract, site description, project
organization and contact details, construction programme, the construction
works undertaken and the status of Environmental Permits/Licenses during the
reporting month.
Section 3: Air Quality Monitoring
– summarises the monitoring parameters, monitoring programmes, monitoring
methodologies, monitoring frequency, monitoring locations, Action and Limit
Levels, monitoring results and Event / Action Plans.
Section 4: Noise Monitoring –
summarises the monitoring parameters, monitoring programmes, monitoring
methodologies, monitoring frequency, monitoring locations, Action and Limit
Levels, monitoring results and Event / Action Plans.
Section 5: Water Quality
Monitoring – summarises the monitoring parameters, monitoring programmes,
monitoring methodologies, monitoring frequency, monitoring locations, Action
and Limit Levels, monitoring results and Event / Action Plans.
Section 6: Ecological Monitoring
– summarises the monitoring parameters, monitoring programmes, monitoring
methodologies, monitoring frequency, monitoring locations and Action and Limit
Levels, monitoring results and Event / Action Plans.
Section 7: Cultural Heritage
–summarises the monitoring parameters, monitoring programmes, monitoring
methodologies, monitoring frequency, monitoring locations and monitoring
results.
Section 8: Landscape and Visual
Monitoring Requirements – summarises the requirements of landscape and
visual monitoring
Section 9: Landfill Gas
Monitoring – summarises the monitoring parameters, monitoring programmes,
monitoring methodologies, monitoring frequency, monitoring locations,
monitoring results and Limit Levels and Action Plan
Section 10: Environmental Site
Inspection – summarises the audit findings of the weekly site inspections undertaken
within the reporting month.
Section 11: Waste Management
– summarises the waste management data in the reporting month.
Section 12: Environmental
Non-conformance – summarises any monitoring exceedance, environmental
complaints, environmental summons and successful prosecutions within the
reporting month.
Section 13: Future Key Issues
– summarises the impact forecast and monitoring schedule for the next three
months.
Section 14: Conclusions and
Recommendation
2.1 In 2002, Civil Engineering and Development Department (CEDD) commissioned an integrated planning and engineering study under Agreement No. CE 87/2001 (CE) “Further Development of Tseung Kwan O – Feasibility Study” (the “TKO Study”) to formulate a comprehensive plan for further development of TKO New Town. It recommended to further develop TKO to house a total population of 450,000 besides the district’s continuous commercial and industrial developments.
2.2 At present, the Tseung Kwan O Tunnel is the main connection between Tseung Kwan O (TKO) and other areas in the territory. To cope with the anticipated transport need, the TKO Study recommended the provision of Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) (hereinafter referred to as “the Project”) and Cross Bay Link (CBL) to meet the long-term traffic demand between TKO and the external areas. The site layout plan for the Project is shown in Figure 1. CBL was also entrusted with part of the marine viaducts near Tseung Kwan O Interchange since the commencement of the CBL project the December 2018.
2.3 The Environmental Impact Assessment (EIA) Report for the TKO-LTT project was approved under the Environmental Impact Assessment Ordinance (EIAO) in July 2013. The corresponding Environmental Permit (EP) was issued in August 2013 (EP no.: EP-458/2013). Variations to the EP was applied and the latest EP (EP no.: EP-458/2013/C) was issued by the Director of Environmental Protection (DEP) in January 2017.
2.4 The commencement dates of construction of this Project are:
Ÿ Contract No. NE/2015/01 and Contract No. NE/2015/02: 7 November 2016.
Ÿ Contract No. NE/2015/03: 29 May 2017.
Ÿ Contract No. NE/2017/02: 15 March 2018.
Ÿ Contract No. NE/2017/01: 23 May 2018.
Ÿ Contract No. NE/2017/06: 09 November 2018.
Ÿ Contract No. NE/2017/07: 22 February 2021
2.5 Different parties with different levels of involvement in the project organization include:
·
Project
Proponent – Civil Engineering and Development Department (CEDD)
·
The
Engineer and the Engineer’s Representative (ER) – AECOM
·
Environmental
Team (ET) – Cinotech Consultants Limited (Cinotech)
·
Independent
Environmental Checker (IEC) – AnewR Consulting Limited (AnewR)
2.6 The key contacts of the Project are shown in Table 2.1.
Table 2.1 Key Project Contacts
|
Role |
Contact Person |
Phone No. |
Fax No. |
|
|
CEDD |
Project Proponent |
Mr. LO Sai Pak, Sunny |
2301 1384 |
2739 0076 |
|
AECOM |
Engineer’s
Representative |
Mr. KY Chan |
3922 9000 |
2759 1698 |
|
Cinotech |
Environmental Team |
Dr. HF Chan |
2151 2088 |
3107 1388 |
|
Mr. KS Lee |
2151 2091 |
|||
|
AnewR |
Independent Environmental Checker |
Mr. James Choi |
2618 2836 |
3007 8648 |
2.7 The major site activities undertaken in the reporting month included:
Table 2.2 Summary Table for Major Site Activities in
the Reporting Month
|
Contract No. |
Project Title |
Site Activities (May 2021) |
|
|
NE/2015/01 |
Tseung Kwan O – Lam Tin
Tunnel – Main Tunnel and Associated Works |
Lam Tin Interchange |
1)
NE/2015/01 |
|
Main Tunnel |
2)
S02_2 Excavation 3)
Main Tunnel Lining Works |
||
|
TKO Interchange |
4)
Bridge Construction 5)
East Ventilation Building |
||
|
NE/2015/02 |
Tseung Kwan O – Lam Tin
Tunnel – Road P2 and Associated Works |
6)
Sloping Seawall Construction 7)
Construction of Underpass at CH821-CH105 8)
Construction of Underpass at CH105-CH318 9)
Construction of Seawall Coping 1) Construction
of Road P2 and SR2 |
|
|
NE/2015/03 |
Tseung Kwan O – Lam Tin Tunnel – Northern Footbridge |
The construction works under the contract had been
completed in December 2019. The EM&A works were terminated in late April
2020. |
|
|
NE/2017/01 |
Tseung Kwan O – Lam Tin Tunnel – Tseung Kwan O
Interchange and Associated Works |
6)
Construction of
Pier 7)
Construction of
Pier Head Works 8)
Construction of Pile Cap 9)
Segment Erection Works 1)
Installation of Parapet Skin |
|
|
NE/2017/02 |
Tseung Kwan O – Lam Tin
Tunnel – Road P2/D4 and Associated Works |
6)
Inspection pit excavation and utility diversion
works 7)
Construction of drainage and watermain 8)
Asphalt Paving 9)
Pier, Staircase and Lift Shalt Construction 1)
Road Works |
|
|
NE/2017/06 |
Tseung Kwan O – Lam Tin Tunnel – Traffic Control and
Surveillance System(TCSS) and Associated Works |
4)
System Integration Test 5)
Installation works at Admin Building 1)
Goods arrival & storage on site |
|
|
NE/2017/07 |
Cross Bay Link, Tseung Kwan O – Main Bridge and
Associated Works |
14)
Predrilling
Work at Portion I had completed with 26 out of 35 numbers 15)
Precast Shell
Installation 16)
1st Stage
Concrete for pile caps 17)
Precast Pier
Installation 18)
2nd Stage
Concrete for pile caps 19)
Precast Box
Girder Installation 20)
E&M Work
and External Work at Portion V 21)
Fabrication of
deck segment panels steel 22)
Round deck
segment assembly 23)
Fabrication of
arch rib panels steel 24)
Round arch rib
segment assembly 25)
Load-out and
Transportation of Steel Main Bridge 1)
Load-out,
Transportation and Floating-in of Steel Bridge |
|
2.8 The construction programme showing the inter-relationship with environmental protection/mitigation measures are presented in Table 2.3.
Table 2.3 Construction Programme Showing the
Inter-Relationship with Environmental Protection/Mitigation Measures
|
Construction Works |
Major Environmental Impact |
Control Measures |
|
As mentioned in Table 2.2 |
Noise, dust
impact, water quality and waste generation |
Ÿ
Sufficient watering of the works site with active
dust emitting activities Ÿ
Properly cover the stockpiles Ÿ
On-site waste sorting and implementation of trip
ticket system Ÿ
Appropriate desilting/sedimentation devices provided
on site for treatment before discharge Ÿ
Use of quiet plant and well-maintained construction
plant Ÿ
Provide movable noise barrier |
2.9 A summary of the relevant permits, licences, and/or notifications on environmental protection for this Project is presented in Table 2.4.
Table
2.4 Summary of the
Status of Environmental Licences, Notification and Permits
|
Contract No. |
Permit / License
No. |
Valid Period |
Status |
|
|
From |
To |
|||
|
Environmental Permit (EP) |
||||
|
N/A |
EP-458/2013/C |
20/1/2017 |
N/A |
Valid |
|
Notification
pursuant to Air Pollution Control (Construction Dust) Regulation |
||||
|
NE/2015/01 |
EPD Ref no.: 405305 |
21/07/2016 |
N/A |
Valid |
|
EPD Ref no.:
405582 |
28/07/2016 |
N/A |
Valid |
|
|
NE/2015/02 |
EPD Ref no.: 406100 |
12/08/2016 |
N/A |
Valid |
|
NE/2015/03 |
EPD Ref no.: 416072 |
26/04/2017 |
N/A |
Valid |
|
NE/2017/02 |
EPD Ref no.: 429867 |
19/01/2018 |
N/A |
Valid |
|
NE/2017/01 |
EPD Ref no.: 430070 |
25/01/2018 |
N/A |
Valid |
|
NE/2017/06 |
EPD Ref no.: 461507 |
03/11/2020 |
N/A |
Valid |
|
Billing Account
for Construction Waste Disposal |
||||
|
NE/2015/01 |
Account No. 7025431 |
11/07/2016 |
N/A |
Valid |
|
NE/2015/02 |
Account No. 7025654 |
16/08/2016 |
N/A |
Valid |
|
NE/2015/03 |
Account No. 7026805 |
30/12/2016 |
N/A |
Valid |
|
NE/2017/02 |
Account No. 7029651 |
22/12/2017 |
N/A |
Valid |
|
NE/2017/01 |
Account No. 7029994 |
01/02/2018 |
N/A |
Valid |
|
NE/2017/06 |
Account No. 7032520 |
22/11/2018 |
N/A |
Valid |
|
NE/2017/07 |
Account No. 7031412 |
24/07/2018 |
N/A |
Valid |
|
Registration
of Chemical Waste Producer |
||||
|
NE/2015/01 |
Waste Producer No. 5218-290-L2881-02 |
22/08/2016 |
N/A |
Valid |
|
Waste Producer
No. 5213-833-L2532-03 |
22/08/2016 |
N/A |
Valid |
|
|
NE/2015/02 |
Waste Producer No. 5213-838-C4094-01 |
23/08/2016 |
N/A |
Valid |
|
NE/2015/03 |
Waste Producer No. 5213-265-W3435-04 |
19/07/2017 |
N/A |
Valid |
|
NE/2017/02 |
Waste Producer No. 5213-833-Z4004-04 |
01/02/2018 |
N/A |
Valid |
|
NE/2017/01 |
Waste Producer No. 5213-833-C4262-01 |
12/02/2018 |
N/A |
Valid |
|
NE/2017/07 |
Waste Producer No. 5213-839-C1232-19 |
28/08/2018 |
N/A |
Valid |
|
Effluent Discharge License under Water
Pollution Control Ordinance |
||||
|
NE/2015/01 |
WT00025806-2016 |
18/07/2018 |
30/11/2021 |
Valid |
|
WT00026212-2016 |
16/05/2017 |
30/11/2021 |
Valid |
|
|
WT00027354-2017 |
22/03/2017 |
31/03/2022 |
Valid |
|
|
WT00027405-2017 |
22/03/2017 |
31/03/2022 |
Valid |
|
|
WT00028495-2017 |
11/08/2017 |
31/08/2022 |
Valid |
|
|
NE/2015/02 |
WT00026386-2016 |
15/12/2016 |
31/12/2021 |
Valid |
|
WT00027226-2017 |
23/02/2017 |
28/02/2022 |
Valid |
|
|
WT00030654-2018 |
16/04/2018 |
30/04/2023 |
Valid |
|
|
NE/2015/03 |
WT00027295-2017 |
20/03/2017 |
31/03/2022 |
Valid |
|
NE/2017/01 |
WT00030711-2018 |
11/04/2018 |
30/04/2023 |
Valid |
|
WT00030716-2018 |
23/05/2018 |
31/05/2023 |
Valid |
|
|
NE/2017/02 |
WT00030654-2018 |
16/04/2018 |
30/04/2023 |
Valid |
|
NE/2017/07 |
WT00032842-2018 |
01/03/2019 |
31/03/2024 |
Valid |
|
WT00034178-2019 |
15/07/2019 |
31/07/2024 |
Valid |
|
|
Construction Noise Permit (CNP) |
||||
|
NE/2015/01 |
GW-RE1070-20 |
22/12/2020 |
21/06/2021 |
Valid |
|
GW-RE0199-21 |
22/03/2021 |
21/09/2021 |
Valid |
|
|
GW-RE0229-21 |
05/04/2021 |
04/07/2021 |
Valid |
|
|
NE/2015/02 |
GW-RE0503-20 |
12/06/2020 |
04/12/2020 |
Valid |
|
NE/2017/01 |
GW-RE0250-21 |
24/03/2021 |
23/06/2021 |
Valid |
|
GW-RE0391-21 |
01/05/2021 |
01/11/2021 |
Valid |
|
|
Marine Dumping
Permit |
||||
|
NE/2017/01 |
EP/MD/21-011 |
N/A |
N/A |
N/A |
|
NE/2015/01 |
CEDD01062 |
N/A |
10/11/2020 |
Valid |
2.10 The EM&A programme requires construction noise monitoring, air quality monitoring, water quality monitoring, environmental site audit, etc. The EM&A requirements for each parameter are described in the following sections, including:
·
All
monitoring parameters;
·
Action
and Limit levels for all environmental parameters;
·
Event
Action Plans;
·
Environmental
mitigation measures, as recommended in the Project EIA Report.
2.12 This report presents the monitoring results, observations, locations, equipment, period, methodology and QA/QC procedures of the monitoring parameters of the required environmental monitoring works and audit works for the Project in May 2021.
3.1
According
to EM&A Manual of the Project, 1-hour and 24-hour TSP monitoring are
required to monitor the air quality. For regular impact monitoring, a sampling
frequency of at least once in every six days shall be undertaken at all of the
monitoring stations for 24-hour TSP monitoring. For 1-hour TSP monitoring, the
sampling frequency of at least three times in every six days shall be
undertaken when the highest dust impact occurs. Appendix A shows the established Action/Limit Levels for the
environmental monitoring works.
3.2
Six
designated monitoring stations were selected for air quality monitoring
programme. Table 3.1 describes the
air quality monitoring locations, which are also depicted in Figure 2.
Table 3.1 Locations
for Air Quality Monitoring
|
Monitoring Stations |
Location |
Location of Measurement |
|
AM1 |
Tin Hau Temple |
Ground Level |
|
AM2 |
Sai Tso Wan
Recreation Ground |
Ground Level |
|
AM3 |
Yau Lai Estate
Bik Lai House |
Rooftop (41/F) |
|
AM4(1) |
Sitting-out Area
at Cha Kwo Ling Village |
Ground Level |
|
AM4(A)(2)
(*) |
Cha Kwo Ling
Public Cargo Working Area Administrative Office |
Rooftop (3/F) |
|
AM5(A)(*) |
Tseung Kwan O DSD
Desilting Compound |
Ground Level |
|
AM6(A) (*) |
Park Central,
L1/F Open Space Area |
1/F |
Remarks: (1) For 1-hour TSP monitoring; (2) For 24-hour TSP monitoring
(*) Air quality monitoring
at designated station AM4(24-hr TSP), AM5 and AM6 was rejected by the premise
owners. Therefore, baseline and impact air quality monitoring works
were carried out at alternative air quality monitoring stations AM4(A) (24-hr
TSP only), AM5(A) and AM6(A) respectively.
3.3
High
Volume Samplers (HVS) were used to carry out 24-hour TSP monitoring. Direct
reading dust meter were also used to measure 1-hour average TSP levels. The
1-hour sampling was determined periodically by HVS to check the validity and
accuracy of the results measured by direct reading method.
3.4
Wind
data monitoring equipment was set at rooftop (about 41/F) of Yau Lai Estate Bik
Lai House for logging wind speed and wind direction such that the wind sensors
are clear of obstructions or turbulence caused by building. The wind data
monitoring equipment is re-calibrated at least once every six months and the
wind directions are divided into 16 sectors of 22.5 degrees each. The location
is shown in Figure 2.
3.5
Table 3.2 summarizes the equipment to be used
in the air quality monitoring. Copies of
calibration certificates are attached in Appendix
B.
Table 3.2 Air Quality Monitoring Equipment
|
Equipment |
Model and Make |
Quantity |
|
Calibrator |
TISCH Model: TE-5025A |
1 |
|
1-hour TSP Dust Meter |
Sibata Model No.: LD-3B / LD-5R |
5 |
|
Met One Instruments Model No.: AEROCET-831 |
0 |
|
|
Handheld Particle Counter Hal-HPC300 / Hal-HPC301 |
0 |
|
|
HVS Sampler |
TISCH Model: TE-5170 |
1 |
|
GMW Model: GS2310 |
5 |
|
|
Wind Anemometer |
Davis Weather Monitor II, Model no. 7440 |
1 |
|
Davis Weather Stations, Vantage Pro 2, Model No.
6152CUK |
0 |
3.6
Table 3.3 summarizes the monitoring parameters, monitoring period and frequencies
of air quality monitoring.
Table 3.3 Frequency and Parameters of Air Quality
Monitoring
|
Monitoring
Stations |
Parameter |
Frequency |
|
AM1, AM2, AM3, AM4, AM5(A) and AM6(A) |
1-hour TSP |
3 times per 6 days |
|
AM1, AM2, AM3, AM4(A), AM5(A) and AM6(A) |
24-hour TSP |
Once per 6 days |
1-hour TSP Monitoring
Measuring Procedures
3.7
The
measuring procedures of the 1-hour dust meter are in accordance with the
Manufacturer’s Instruction Manual as follows:
(Model LD3 / LD3B / LD5R)
Ÿ The 1-hour dust meter is placed at
least 1.3 meters above ground.
Ÿ Set POWER to “ON” and make sure that
the battery level was not flash or in low level.
Ÿ Allow the instrument to stand for
about 3 minutes and then the cap of the air sampling inlet has been released.
Ÿ Push the knob at MEASURE position.
Ÿ Set time/mode setting to [BG] by
pushing the time setting switch. Then,
start the background measurement by pushing the start/stop switch once. It will take 6 sec. to complete the
background measurement.
Ÿ Push the time setting switch to
change the time setting display to [MANUAL] at the bottom left of the liquid
crystal display. Finally, push the
start/stop switch to stop the measuring after 1 hour sampling.
Ÿ Information such as sampling date,
time, count value and site condition were recorded during the monitoring
period.
(AEROCET-531)
Ÿ The 1-hour dust meter is placed at
least 1.3 meters above ground.
Ÿ Remove the red rubber cap from the
AEROCET-531 inlet nozzle.
Ÿ Turn on the power switch that is
located on the right side of the AEROCET-531.
Ÿ On power up the product intro screen
is displayed for 3 seconds. The intro screen displays the product name and
firmware version.
Ÿ Then the main counter screen will be
displayed.
Ÿ Press the START button. Internal
vacuum pump start running. After 1 minute the pump will stop and the 0.5µm and
5µm channels will show the cumulative counts of particles larger than 0.5µm and
5µm per cubic foot.
Ÿ The AEROCET-531 is now checked out
and ready for use.
Ÿ To switch off the AEROCET-531 power
to stop the measuring after 1 hour sampling.
Ÿ Information such as sampling date,
time, and display value and site condition were recorded during the monitoring
period.
(Equipment: Hal Technology; Model no. Hal-HPC300 / Hal-HPC301)
Ÿ The 1-hour dust meter is placed at
least 1.3 meters above ground.
Ÿ Set POWER to “ON” and make sure that
the battery level was not flash or in low level.
Ÿ Allow the instrument to stand for
about 3 minutes and then the cap of the air sampling inlet has been released.
Ÿ Push the knob at MEASURE position.
Ÿ Set time/mode setting to [BG] by
pushing the time setting switch. Then,
start the background measurement by pushing the start/stop switch once. It will take 6 sec. to complete the
background measurement.
Ÿ Push the time setting switch to
change the time setting display to [MANUAL] at the bottom left of the liquid
crystal display. Finally, push the
start/stop switch to stop the measuring after 1 hour sampling.
Ÿ Information such as sampling date,
time, count value and site condition were recorded during the monitoring
period.
Maintenance/Calibration
3.8
The
following maintenance/calibration is required for the direct dust meters:
Ÿ Check and calibrate the meter by HVS
to check the validity and accuracy of the results measured by direct reading
method at 2-month intervals throughout all stages of the air quality
monitoring.
24-hour TSP Monitoring
Instrumentation
3.9
High
volume samplers (HVS) (TISCH Model: TE-5170 and GMW Model: GS2310) completed
with appropriate sampling inlets were employed for 24-hour TSP monitoring. The sampler is composed of a motor, a filter
holder, a flow controller and a sampling inlet and its performance
specification complied with that required by USEPA Standard Title 40, Code of
Federation Regulations Chapter 1 (Part 50).
3.10
The
positioning of the HVS samplers are as follows:
· a horizontal platform with
appropriate support to secure the samplers against gusty wind shall be
provided;
· no two samplers shall be placed less
than 2 meter apart
· the distance between the sampler and
an obstacle, such as buildings, must be at least twice the height that the
obstacle protrudes above the sampler;
· a minimum of 2 metres of separation
from walls, parapets and penthouses is required for rooftop samplers;
· a minimum of 2 metres of separation
from any supporting structure, measured horizontally is required;
· no furnace or incinerator flue is
nearby;
· airflow around the sampler is
unrestricted;
· the sampler is more than 20 metres
from the dripline;
· any wire fence and gate, to protect
the sampler, shall not cause any obstruction during monitoring;
· permission must be obtained to set
up the samplers and to obtain access to the monitoring stations; and
· a secured supply of electricity is
needed to operate the samplers.
Operating/analytical procedures for the operation of HVS
3.11
Prior
to the commencement of the dust sampling, the flow rate of the high volume
sampler was properly set (between 1.1 m3/min. and 1.4 m3/min.)
in accordance with the manufacturer's instruction to within the range
recommended in USEPA Standard Title 40, CFR Part 50.
3.12
For
TSP sampling, fiberglass filters with a collection efficiency of > 99% for
particles of 0.3μm diameter were used.
3.13
The
power supply was checked to ensure the sampler worked properly. On sampling, the sampler was operated for 5
minutes to establish thermal equilibrium before placing any filter media at the
designated air monitoring station.
3.14
The
filter holding frame was then removed by loosening the four nuts and a weighted
and conditioned filter was carefully centred with the stamped number upwards,
on a supporting screen.
3.15
The
filter was aligned on the screen so that the gasket formed an airtight seal on
the outer edges of the filter. Then the
filter holding frame was tightened to the filter holder with swing bolts. The
applied pressure should be sufficient to avoid air leakage at the edges.
3.16
The
shelter lid was closed and secured with the aluminium strip.
3.17
The
timer was then programmed. Information
was recorded on the record sheet, which included the starting time, the weather
condition and the filter number (the initial weight of the filter paper can be
found out by using the filter number).
3.18
After
sampling, the filter was removed and sent to the HOKLAS laboratory (ALS Hong
Kong) for weighing. The elapsed time
will be also recorded.
3.19
Before
weighing, all filters was equilibrated in a conditioning environment for 24
hours. The conditioning environment temperature should be between 25°C and 30°C
and not vary by more than ±3°C; the relative humidity (RH) should be < 50%
and not vary by more than ±5%. A convenient working RH is 40%.
Maintenance/Calibration
3.20
The
following maintenance/calibration is required for the HVS:
Ÿ The high volume motors and their
accessories will be properly maintained. Appropriate maintenance such as
routine motor brushes replacement and electrical wiring checking will be made
to ensure that the equipment and necessary power supply are in good working
condition.
Ÿ High volume samplers will be
calibrated at bi-monthly intervals using TE-5025A Calibration Kit throughout
all stages of the air quality monitoring.
3.21
No
Action/Limit Level exceedance was recorded for both 1-hour TSP and 24-hour TSP
monitoring respectively.
3.22
The
air temperature, precipitation and the relative humidity data was obtained from
Hong Kong Observatory where the wind speed and wind direction were recorded by
the installed Wind Anemometer at rooftop of Yau Lai Estate Bik Lai House (41/F). The location is shown
in Figure 2. This weather
information for the reporting month is summarized in Appendix C.
3.23
The
monitoring data and graphical presentations of 1-hour and 24-hour TSP
monitoring results are shown in Appendix
E and Appendix F respectively.
3.24
According
to our field observations, the major dust source identified at the designated
air quality monitoring stations are as follows:
Table 3.4 Major
Dust Source during Air Quality Monitoring
|
Station |
Major Dust Source |
|
AM1 – Tin Hau Temple |
Road Traffic at Cha Kwo Ling Road |
|
AM2 – Sai Tso Wan Recreation Ground |
N/A |
|
AM3 – Yau Lai Estate Bik Lai House |
Road Traffic near Eastern Cross Harbour Tunnel Toll
Plaza |
|
AM4 - Sitting-out Area at Cha Kwo Ling Village |
Road Traffic at Cha Kwo Ling Road |
|
AM4(A) - Cha Kwo Ling Public Cargo Working Area
Administrative Office |
Road Traffic at Cha Kwo Ling Road |
|
AM5(A) - Tseung Kwan O DSD Desilting Compound |
Vehicle Movement within the Desilting Compound |
|
AM6(A) - Park Central, L1/F Open Space Area |
Road Traffic at Po Yap Road |
4.1
According
to EM&A Manual of the Project, construction noise monitoring was conducted
to monitor the construction noise arising from the construction activities. The
regular monitoring frequency for each monitoring station shall be on a weekly
basis and conduct one set of measurements between 0700 and 1900 hours on normal
weekdays. Appendix A shows the
established Action and Limit Levels for the environmental monitoring works.
4.2
Noise
monitoring was conducted at 9 designated monitoring stations (CM1, CM2, CM3,
CM4, CM5, CM6(A), CM7(A), CM8(A), CM9(A)) in the reporting period. Table 4.1 and Figure 3 show the locations of these stations.
Table 4.1 Noise Monitoring Stations
|
Monitoring Stations |
Locations |
Location of Measurement |
|
CM1 |
Nga Lai House,
Yau Lai Estate Phase 1, Yau Tong |
Rooftop (41/F) |
|
CM2 |
Bik Lai House,
Yau Lai Estate Phase 1, Yau Tong |
Rooftop (41/F) |
|
CM3 |
Block S, Yau Lai
Estate Phase 5, Yau Tong |
Rooftop (40/F) |
|
CM4 |
Tin Hau Temple,
Cha Kwo Ling |
Ground Level |
|
CM5 |
CCC Kei Faat
Primary School, Yau Tong |
Rooftop (6/F) |
|
CM6(A)* |
Site Boundary of Contract No. NE/2015/02 near Tower
1, Ocean Shores |
Ground Level |
|
CM7(A)* |
Site Boundary of Contract No. NE/2015/02 near Tower
7, Ocean Shores |
Ground Level |
|
CM8(A)* |
Park Central, L1/F Open Space Area |
1/F |
|
CM9(A)1 |
Rooftop of Capri Tower 10 |
Rooftop (12/F) |
* Noise monitoring
at designated station CM6, CM7 & CM8 was rejected by the premise owners.
Therefore, baseline and impact noise monitoring works were carried out at
alternative noise monitoring stations CM6(A), CM7(A) and CM8(A) respectively.
1 Ad-hoc noise
monitoring at station CM9(A) was commenced in September 2019.
4.3 Since the population intake of Capri had commenced during the construction of the TKOLTT, the noise monitoring work in daytime period was conducted at CM9(A) – Rooftop of Capri Tower 10 on normal weekdays. The background Noise Level was recorded during the Lunch Hour of Construction Site (i.e. 12:00-13:00) and to be used as the referencing value for compliance checking for Noise Action and Limit Level.
4.4
Integrating
Sound Level Meter was used for impact noise monitoring. The meters are Type 1
sound level meter capable of giving a continuous readout of the noise level
readings including equivalent continuous sound pressure level (Leq)
and percentile sound pressure level (Lx) that also complied with
International Electrotechnical Commission Publications 651:1979 (Type 1) and
804:1985 (Type 1) specifications. Table
4.2 summarizes the noise monitoring equipment being used. Copies of
calibration certificates are attached in Appendix
B.
Table 4.2 Noise Monitoring
Equipment
|
Equipment |
Model and Make |
Quantity |
|
Integrating Sound Level Meter |
SVAN 957/ 959 /
979 |
2 |
|
BSWA308 SLM |
3 |
|
|
Calibrator |
SV30A |
0 |
|
Brüel & Kjær
4231 |
1 |
|
|
ST-120 |
2 |
4.5
Table 4.3 summarizes the monitoring parameters, frequency and total duration of
monitoring. The noise monitoring schedule is shown in Appendix D. Additional weekly impact monitoring are carried out for
evening time (1900 – 2300 hours) for monitoring stations CM1, CM2, CM3 &
CM6(A) and night-time (2300 – 0700 hours) for monitoring stations CM1, CM2
& CM3.
Table 4.3 Frequency and Parameters of Noise Monitoring
|
Monitoring Stations |
Parameter |
Period |
Frequency |
Measurement |
|
CM1 |
L10(30 min) dB(A) L90(30 min) dB(A) Leq(30 min) dB(A) |
0700-1900 hrs on normal weekdays |
Once per week |
Façade |
|
CM2 |
Façade |
|||
|
CM3 |
Façade |
|||
|
CM4 |
Façade |
|||
|
CM5 |
Façade |
|||
|
CM6(A) |
Free Field |
|||
|
CM7(A) |
Free Field |
|||
|
CM8(A) |
Façade |
|||
|
CM9(A) |
Façade |
|||
|
CM1 |
L10(5 min) dB(A) L90(5 min) dB(A) Leq(5 min) dB(A) |
1900 – 0700 hrs on normal weekdays |
Façade |
|
|
CM2 |
Façade |
|||
|
CM3 |
Façade |
|||
|
CM6(A) |
1900 – 2300 hrs on normal weekdays |
Free Field |
Monitoring Methodology and QA/QC Procedure
4.6
The
monitoring procedures are as follows:
· The monitoring station was normally
be at a point 1m from the exterior of the sensitive receivers building façade
and be at a position 1.2m above the ground.
· For free field measurement, the
meter was positioned away from any nearby reflective surfaces. All records for
free field noise levels was adjusted with a correction of +3 dB(A).
· The battery condition was checked to
ensure the correct functioning of the meter.
· Parameters such as frequency
weighting, the time weighting and the measurement time was set as follows:
- frequency weighting : A
- time weighting : Fast
- measurement time : 30 minutes
· Prior to and after each noise
measurement, the meter was calibrated using a Calibrator for 94.0 dB at 1000
Hz. If the difference in the calibration level before and after measurement
will be more than 1.0 dB, the measurement would be considered invalid and
repeat of noise measurement would be required after re-calibration or repair of
the equipment.
· At the end of the monitoring period,
the Leq, L90 and L10 was recorded. In addition, noise sources was recorded on a
standard record sheet.
· Noise monitoring will be cancelled
in the presence of fog, rain, and wind with a steady speed exceeding 5 m/s, or
wind with gusts exceeding 10 m/s. Supplementary monitoring was provided to
ensure sufficient data would be obtained.
Maintenance and Calibration
4.7
The
microphone head of the sound level meter and calibrator was cleaned with a soft
cloth at quarterly intervals.
4.8
The
sound level meter and calibrator was checked and calibrated at yearly
intervals.
4.9
Immediately
prior to and following each noise measurement the accuracy of the sound level
meter was checked using an acoustic calibrator generating a known sound
pressure level at a known frequency. Measurements may be accepted as valid only
if the calibration levels from before and after the noise measurement agree to
within 1.0 dB.
4.10
One (1) Action Level exceedances were recorded due to the documented
complaints received in this reporting month. No project-related Limit level exceedances
for evening/night-time construction noise monitoring were recorded and no Limit
Level exceedance for day time was recorded in the reporting month.
4.11
Noise
monitoring results and graphical presentations are shown in Appendix G.
4.12
The
major noise source identified at the noise monitoring stations are shown in Table 4.4.
Table 4.4 Major
Noise Source during Noise Monitoring
|
Monitoring Stations |
Locations |
Major Noise Source |
|
CM1 |
Nga Lai House, Yau Lai Estate Phase 1, Yau Tong |
Road Traffic near Eastern
Cross Harbour Tunnel Toll Plaza |
|
CM2 |
Bik Lai House, Yau Lai Estate Phase 1, Yau Tong |
Road Traffic near Eastern
Cross Harbour Tunnel Toll Plaza |
|
CM3 |
Block S, Yau Lai Estate Phase 5, Yau Tong |
Road Traffic near Eastern
Cross Harbour Tunnel Toll Plaza |
|
CM4 |
Tin Hau Temple, Cha Kwo Ling |
Road Traffic at Cha Kwo Ling
Road |
|
CM5 |
CCC Kei Faat Primary School, Yau Tong |
Road Traffic at Yau Tong
Road |
|
CM6(A) |
Site Boundary of Contract No. NE/2015/02 near Tower
1, Ocean Shores |
Road Traffic at O King Road
near Ocean Shores |
|
CM7(A) |
Site Boundary of Contract No. NE/2015/02 near Tower
7, Ocean Shores |
Road Traffic at Tong Yin
Street |
|
CM8(A) |
Park Central, L1/F Open Space Area |
Road Traffic at Po Yap Road |
|
CM9(A) |
Rooftop of Capri Tower 10 |
Construction Noise from
Portion V/Area A of NE/2015/02 site area |
4.13
All
the Construction Noise Levels (CNLs) reported in this report were adjusted with
the corresponding baseline level (i.e. Measured Leq – Baseline Leq
= CNL), in order to facilitate the interpretation of the noise exceedance. The
baseline noise level and the Noise Limit Level at each designated noise
monitoring station are presented in Table
4.5, 4.6 and 4.7.
Table 4.5 Baseline
Noise Level and Noise Limit Level for Monitoring Stations
|
Station |
Baseline Noise Level, dB (A) |
Noise Limit Level, dB (A) (at 0700
– 1900 hrs on normal weekdays) |
|
CM1 |
65.5 |
75 |
|
CM2 |
63.6 |
|
|
CM3 |
65.6 |
|
|
CM4 |
62.0 |
|
|
CM5 |
68.2 |
70* |
|
CM6(A) |
61.9 |
75 |
|
CM7(A) |
58.3 |
|
|
CM8(A) |
69.1 |
|
|
CM9(A) |
N/A(1) |
|
|
(*) Noise Limit Level is 65 dB(A) during school examination periods. (1) ) The background Noise Level was recorded during the Lunch Hour of Construction Site (i.e. 12:00-13:00) and to be used as the referencing value for compliance checking for Noise Action and Limit Level. |
||
Table 4.6 Baseline
Noise Level and Noise Limit Level for Monitoring Stations (Evening-time &
Daytime (Holiday))
|
Station |
Baseline Noise Level, dB (A) (Evening time on all days (1900-2300 hrs) and Holidays (including
Sundays) during daytime (0700-1900 hrs)) |
Noise Limit Level, dB (A) (Evening time on all days (1900-2300 hrs) and Holidays (including
Sundays) during daytime (0700-1900 hrs)) |
|
CM1 |
64.4 |
70 |
|
CM2 |
62.2 |
|
|
CM3 |
64.7 |
|
|
CM6(A) |
60.2 |
651 |
|
1. ASR B was adopted according to the EIA as traffic in the
surrounding area has not been changed. |
||
Table 4.7 Baseline Noise
Level and Noise Limit Level for Monitoring Stations (Night-time)
|
Station |
Baseline Noise Level, dB (A) (Night-time (2300 – 0700 hrs) |
Noise Limit Level, dB (A) (Night-time (2300 – 0700 hrs) |
|
CM1 |
14-day baseline
monitoring results for the time period of impact measurement at each station
would be adopted |
55 |
|
CM2 |
||
|
CM3 |
Current Tunnel Blasting Arrangement
4.14
The
drill and blast method was evaluated as the most appropriate method and the
general practice of this method was introduced during the EIA report
assessment. The paragraphs 2.9.9 and 2.9.33 of the EIA Report mention that
there might be one blast or multiple blasts and the maximum number of blast
location per day would be determined by the Contractor to suite his method of
working.
4.15
Notwithstanding
the information provided by the Engineer at paragraphs 4.6.4 and 6.6.12 of the
EIA Report, to minimize blast nuisance to the public and to respond to the
community concerns, the tunnel blast should be arranged, where possible,
avoiding the blast to be carried out during night time and shortening the blast
duration by arranging various work fronts to be blasted at different time
slots. Hence, it has become more desirable to split one tunnel blasting
operation, which may consist of several blasting work fronts along the tunnels,
into a total of two to three tunnel blasts per day. The tunnel blasts, which
locate outside the MTR Protection Zone (RPZ) possessing insignificant risk to
the MTR's structures would be carried out during day time and before 22:00. For
the tunnel blasts within and in close vicinity to RPZ, Contractor's blasting
assessment report revealed that those blasts have to be carried out after train
service and, generally, at around 01:40.
Groundwater Quality
5.1
The existing groundwater quality monitoring
programme has been suspended as the monitoring results had been deemed
non-representative of the impact from the project justified by two major
factors: (1) influence on the monitoring results from non-project related
factors, such as anthropogenic activities and natural phenomenon; and (2) large
separation between the monitoring stations and works area. In addition, as no alternative
locations for the groundwater quality monitoring were available, the
groundwater quality monitoring has been suspended since October 2019 upon the
agreement by EPD.
Marine Water Quality
5.2
Marine
water quality monitoring was conducted three times per week at the designated
monitoring stations. Monitoring took place two times per monitoring day during
mid ebb and mid flood tides at three depths (1 meter from surface, mid depth
and 1 meter from the bottom). For Tseung Kwan O Salt Water Intake (i.e. Station
M6), water sampling and in-situ measurements was taken at the vertical level
where the water abstraction point of the intake is located (i.e. approximately
mid-depth level). If the water depth is less than 6m, the mid-depth measurement
may be omitted. If the depth is less than 3m, only the mid-depth measurements
need to be taken.
5.3
Duplicate
in-situ measurements (Dissolved oxygen (DO) concentration, DO saturation,
turbidity, pH, temperature and salinity) and water samples (suspended solids
(SS)) at each depth were monitored in accordance with the requirements in the
EM&A Manual. For selection of tides for in-situ measurement and water
sampling, tidal range of individual flood and ebb tides were not less than
0.5m.
5.4
According
to the Environmental Review Report (ERR) for Variations of Environmental Permit
(Ref: C45-03), water quality monitoring and audit programme was implemented for
monitoring of oxygen depletion (e.g. Dissolved Oxygen (DO) level) in this
embayed waters during the period when the fully enclosed barrier is installed.
A “Proposal for Water Quality Monitoring in Temporary Marine Embayment” has
been submitted to EPD in July 2017 to propose the monitoring frequency,
parameter, location, etc. EPD has no further comment on the Proposal. Since
January 2020, the cofferdam has been partially removed and the seawater is no
longer enclosed. Therefore, no embayment water quality monitoring is required.
Groundwater
Level Monitoring (Piezometer Monitoring)
5.5
Daily piezometer monitoring at any time of the day
shall be carried throughout the whole period when any tunnel construction
activities are carried out within +/- 50m of the piezometer gate in plan. The
monitoring commenced in June 2018. It has switched to monthly basis since 3 October 2018 as the construction activity was
120m away from the piezometer gate. No monitoring was conducted in the
reporting month.
Marine Water Quality
5.6
A
total of twelve monitoring stations are designated for the water quality
monitoring program according to EM&A Manual. One additional monitoring
station (W1) is designated for monitoring of oxygen depletion in the embayed
waters during the period when the fully enclosed barrier is installed. The
locations are also summarized in Table
5.2 and shown on Figure 5.
Table 5.2 Marine
Quality Monitoring Stations
|
Descriptions |
Coordinates |
||
|
Easting |
Northing |
||
|
M1 |
Junk Bay Coral Site – Junk Bay near Chiu Keng Wan |
844255 |
817565 |
|
M2 |
Junk Bay Coral Site – Junk Bay |
844076 |
817087 |
|
M3 |
Junk Bay Coral Site – Junk Island |
844491 |
817890 |
|
M4 |
Junk Bay Coral Site –Chiu Keng Wan |
843209 |
816416 |
|
M5 |
Junk Bay Coral Site – Fat Tong Chau |
845463 |
815769 |
|
M6 |
Tseung Kwan O Salt Water Intake |
845512 |
817442 |
|
C1 |
Control Station – Southeast |
844696 |
814773 |
|
C2 |
Control Station – Northwest |
842873 |
816014 |
|
G1 |
Gradient Station |
844418 |
817560 |
|
G2 |
Gradient Station |
844290 |
817384 |
|
G3 |
Gradient Station |
844488 |
817735 |
|
G4 |
Gradient Station |
844967 |
817551 |
5.7
For in-situ monitoring, a multi-parameter meter
(Aquaread AP-2000-D) was used to measure Dissolved oxygen (DO) concentration, DO saturation (DO %), pH,
temperature and turbidity. A
sampler was used to collect water samples for laboratory analysis of SS, BOD5,
TOC, Total Nitrogen, Ammonia-N and Total Phosphate.
Dissolved
Oxygen (DO) and Temperature Measuring Equipment
5.8
The instrument for measuring dissolved oxygen and
temperature was portable and weatherproof complete with cable, sensor,
comprehensive operation manuals and use DC power source. It was capable of
measuring:
Ÿ
a dissolved oxygen level in the range of 0-20 mg/L
and 0-200% saturation; and
Ÿ
a temperature of 0-45 degree Celsius.
5.9
It has a membrane electrode with automatic
temperature compensation complete with a cable.
5.10
Sufficient stocks of spare electrodes and cables
were available for replacement where necessary.
5.11
Salinity compensation was built-in in the DO
equipment.
Turbidity
5.12
Turbidity was measured in-situ by the nephelometric
method. The instrument was portable and weatherproof using a DC power source
complete with cable, sensor and comprehensive operation manuals. The equipment
was capable of measuring turbidity between 0-1000 NTU. The probe cable was not
be less than 25m in length.
pH
5.13
The instrument was consisting of a potentiometer, a
glass electrode, a reference electrode and a temperature-compensating device.
It was readable to 0.1pH in a range of 0 to 14. Standard buffer solutions of at
least pH 7 and pH 10 were used for calibration of the instrument before and
after use.
Water
Depth Detector
5.14
A portable, battery-operated echo sounder was used
for the determination of water depth at each designated monitoring station.
Water
Sampler
5.15
Water samples collected for laboratory analysis
were stored in high density polythene bottles sample containers, with
appropriate preservatives added. All sampling bottles were labelled
(waterproof) with the sampling date and time, sample lot number and sampling
location reference number to avoid mishandling.
Sample
Container and Storage
5.16
Following collection, water samples for laboratory
analysis were stored in high density polythene bottles, with preservative
appropriately added where necessary. They will be packed in ice (cooled to 4°C without being frozen), delivered to the
laboratory and analysed as soon as possible.
Calibration
of In-Situ Instruments
5.17
All in-situ monitoring instruments were checked,
calibrated and certified by a laboratory accredited under HOKLAS or other
international accreditation scheme before use, and subsequently re-calibrated
at 3 monthly intervals throughout all stages of the water quality monitoring.
5.18
For the on-site calibration of field equipment, the
BS 1427:1993, "Guide to Field and on-site test methods for the analysis of
waters" was observed.
5.19
Before each round of monitoring, a zero check in
distilled water was performed with the turbidity probe of Aquaread AP-2000-D.
The probe was then be calibrated with a solution of known NTU.
5.20
Sufficient stocks of spare parts were maintained
for replacements when necessary. Backup monitoring equipment was also made
available so that monitoring can proceed uninterrupted even when some equipment
is under maintenance, calibration, etc.
5.21
Table 5.3
summarizes the equipment used in the water
quality monitoring program. Copies of the calibration certificates of the
equipment are shown in Appendix B.
Table 5.3 Water
Quality Monitoring Equipment
|
Equipment |
Model and Make |
Qty. |
|
Water Sampler |
Kahlsico
Water-Bottle Model 135DW 150 |
1 |
|
Multi-parameter
Water Quality System |
YSI 6820-C-M |
0 |
|
Aquaread AP-2000-D |
0 |
|
|
YSI EXO1 Multiparameter Sondes |
1 |
|
|
Monitoring
Position Equipment |
“Magellan”
Handheld GPS Model GPS-320 |
1 |
|
Water Depth
Detector |
Fishfinder 140 |
1 |
5.22
Table 5.4 summarizes the monitoring parameters, monitoring period and frequencies
of the water quality monitoring in the reporting period.
Table 5.4 Water Quality Monitoring Parameters and
Frequency
|
Monitoring
Stations |
Parameters, unit |
Depth |
Frequency |
|
M1 M2 M3 M4 M5 M6 C1 C2 G1 G2 G3 G4 |
In-situ: Dissolved oxygen
(DO) concentration, DO saturation, turbidity, pH, temperature and salinity Laboratory
Testing: Suspended Solids
(SS) |
M1-M5, C1-C2, G1-G4 ·
3 water depths: 1m below water surface, mid-depth
and 1m above sea bed. ·
If the water depth is less than 3m, mid-depth
sampling only. ·
If the water depth is less than 6m, omit mid-depth
sampling. M6 ·
at the vertical level where the water abstraction
point of the intake is located(i.e. approximately mid-depth level) |
3 days per week / 2 per monitoring day (1 for mid-ebb and 1 for mid-flood) |
Marine Water Quality
5.23
The
monitoring stations were accessed using survey boat by the guide of a hand-held
Global Positioning System (GPS). The depth of the monitoring location was
measured using depth meter in order to determine the sampling depths.
Afterwards, the probes of the in-situ measurement equipment was lowered to the
predetermined depths (1 m below water surface, mid-depth and 1 m above seabed)
and the measurements was carried out accordingly. The in-situ measurements at
predetermined depths was carried out in duplicate. In case the difference in
the duplicate in-situ measurement results was larger than 25%, the third set of
in-situ measurement would be carried out for result confirmation purpose.
5.24
Water
sampler was lowered into the water to the required depths of sampling. Upon
reaching the pre-determined depth, a messenger to activate the sampler was then
released to travel down the wire. The water sample was sealed within the
sampler before retrieving. At each station, water samples for SS at three
depths (1 m below water surface, mid-depth and 1 m above seabed) were collected
accordingly. Water samples were stored in a cool box and kept at less than 4°C but without frozen and sent to the laboratory as soon as possible.
5.25
The
testing of all parameters were conducted by ALS Hong Kong (HOKLAS Registration
No.083) and comprehensive quality assurance and control procedures in place in
order to ensure quality and consistency in results. The testing method and
limit of reporting are provided in Table
5.5.
Table 5.5 Methods for Laboratory Analysis for Water
Samples
|
Parameters (Unit) |
Proposed Method |
Reporting Limit |
Detection Limit |
|
SS (mg/L) |
APHA 2540 D |
0.5 mg/L (1) |
0.5 mg/L |
|
BOD5 (mg
O2/L) |
APHA 19ed 5210B |
2 mg O2/L |
-- |
|
TOC (mg-TOC/L) |
In-house method
SOP020 (Wet Oxidation) |
1 mg-TOC/L |
-- |
|
Total Nitrogen |
In-house method
SOP063 (FIA) |
0.6 mg/L |
-- |
|
Ammonia-N |
In-house method
SOP057 (FIA) |
0.05 mg NH3-N/L |
-- |
|
Total Phosphorus |
In-house method
SOP055 (FIA) |
0.05 mg-P/L |
-- |
Note:
1) Limit of Reporting is reported as Detection Limit
for non-HOKLAS report.
2) Parameter Total
Phosphorus represents the laboratory testing for total phosphate content in
water which is the sum of all three forms of phosphates in water.
5.26
Water
sampling equipment used during the course of the monitoring programme was decontaminated
by manual washing and rinsed clean seawater/distilled water after each sampling
event. All disposal equipment was discarded after sampling.
Sampling Management and Supervision
5.27
Water samples were dispatched to the testing
laboratory for analysis as soon as possible after the sampling. All samples
were stored in a cool box and kept at less than 4°C but without frozen. All water samples were
handled under chain of custody protocols and relinquished to the laboratory
representatives at locations specified by the laboratory.
5.28
QA/QC procedures as attached in Appendix J are available for the
parameters analysed in the HOKLAS-accredited laboratory, ALS Hong Kong.
Groundwater Quality Monitoring
5.29
Monitoring
of groundwater quality had been suspended since October 2019. (Details refer to
Section 5.1)
Marine Water Quality Monitoring
5.30
Marine
water monitoring results and graphical presentations are shown in Appendix I. Other relevant data was also recorded, such
as monitoring location / position, time, sampling depth, weather conditions and
any special phenomena or work underway nearby.
Calculated
Action and Limit Levels for Marine
Water Quality is presented in Appendix I.
There were thirty-two (32)
Action Level and one-hundred-and-twelve (112) Limit Level exceedances
recorded in Monitoring Stations (M) during marine water quality monitoring.
5.31
Exceedances
of turbidity and suspended solid were recorded on from various monitoring
stations non-specifically among all stations including the control stations. Investigations over May
2021 showed that the range of SS levels recorded in April 2021 remained
consistent with the records in recent months. All Contractor is reminded to
strictly follow the approved drainage plan and clear drainage regularly. In
particular, all drainage shall be checked and cleared after heavy rainstorm as
sediments may accumulate along pipes and culverts. Further details can be found
in Appendix K.
5.32 Silt curtain inspections are carried out before the commencement of the construction works every day and diving surveys are also conducted once a week to inspect the silt curtain below the water level. The inspection report are verified by both the RE and the diving specialist and the records are reviewed weekly during the site audits.
Groundwater
Level Monitoring (Piezometer Monitoring)
5.33
Daily
piezometer monitoring at any time of the day shall be carried throughout the
whole period when any tunnel construction activities are carried out within +/-
50m of the piezometer gate in plan.
5.34
Construction
phase daily piezometer monitoring by the Contractor commenced in June 2018. As the
construction activity was 120m away from the piezometer gate, no monitoring was
conducted in this reporting month.
5.35
During
dry season, the Contractors have maintained the mitigation measures adopted on
Site, in order to prevent surface run-off and muddy water from discharging to
the public areas. The mitigation measures adopted by each Contract are
summarised below:
NE2015/01
5.36
At Lam Tin Side, the Site
drainage systems are divided into two parts, namely the site formation and
tunnel site drainage which includes:
1. Site formation drainage system collects
surface run-off from open excavation areas including slope works and flows
naturally to the lowest point in the Site, where they are pumped to the wetseps
and sedimentation tank for treatment near LTI site entrance before they are
discharged to the designated discharge point.
2. Tunnel drainage system collects surface
run-off from the tunnel which are then pumped to the sedimentation tanks near
tunnel adit, where three sets of wetseps and sedimentation tanks were set up.
The treated water will be discharged to designated discharge point near the
Eastern Harbour Crossing (EHC) area.
5.37
At
Eastern Harbour Crossing (EHC), two sets of wetseps and sedimentation tanks are
set up on site. The wastewater will flow to the lowest catchpit by gravity,
which are then pumped to wetseps for wastewater treatment. The sandbags/bunds
are also set up at the vehicle entrance to surface run-off from the Site.
5.38
At
Tseung Kwan O (TKO), the surface run-off from the slope are directed to the
lowest point at cavern via the permanent drainage, which are then pumped to the
sedimentation tanks for wastewater treatment via temporary pipes. The treated
water will be discharged at designated discharge points. The wetseps and
sedimentation tanks are provided under the BMCPC bridge and at the two sides of
marine working platform. Water from natural stream will also be diverted to
existing drainage to avoid overloading the capacity of the wastewater treatment
system. The reservoir on the right side of marine working platform will be
enlarged to cater for higher water storage demands. During heavy rainfall, the
water stored at the exit of the tunnel shall be pumped into the sedimentation
tanks on the right.
NE2015/02
5.39
The
exposed sloped area at Portion 9 has been covered with geotextile or tarpaulin to
avoid surface run-off. Since March 2021, the stormwater at Portion IX, VIII,
VII, VI, II and I will be collected towards to the sedimentation tanks at the
edge of site boundary.
5.40
Certain
amount of stormwater received in Portion 9 will be directed and pumped via the
flex tube and sump towards the water treatment system and the approved
discharge points (as shown in Appendix V).
Water generated from Portion VI and V and some water in Portion IX are treated
via storage tanks and sedimentation tanks and discharged into approved discharge
points (manholes of DN2100 Drain and Area Z).
5.41
The
peripheral open U-channel are also provided along the site boundary, which
shall be directed to the storage tank and WetSep for treatment in Area A.
5.42
Regular
cleaning depending on site conditions are provided for the WetSep at Area A and
Z; and the storage tanks and sedimentation tanks at Area A. The water treated
by the sedimentation tank and the wetsep shall be discharged towards the
designated discharge point. Quality of the effluent are also monitored
regularly.
NE2017/02
5.43
Existing
manholes are covered with sandbags and geotextiles to avoid surface run-off
from entering the channels.
5.44
Stockpiles
are covered with tarpaulin to avoid surface run-off.
5.45
Concrete
blocks and sandbags are placed along the periphery of the site boundary to
avoid surface run-off.
5.46
Stormwater
within the site enters the excavated area and flow naturally into the sump due
height difference. The stormwater collected in the sump shall be pumped into
the sedimentation tank where the run-off is treated before discharging into the
designated discharge point.
NE2015/03
5.47
The
existing manhole cover are covered with geotextile to prevent muddy water from
entering the existing U-channels along the side of Po Shun Road. Manhole
inspection are carried out by taking silt measurement regularly in case if silt
enters the channel, and silt shall be removed from the manhole if silt were
found.
5.48
Sandbags
were placed at the periphery of the site along the hoarding to prevent surface
runoff from escaping the site.
5.49
Exposed
slopes are covered with tarpaulin to prevent surface run-off.
5.50
The
surface run-off shall be pumped into the sedimentation tank where they are
treated before entering the designated discharge points.
NE2017/01
5.51
Temporary
peripheral open U-channels and sumps are provided for collecting the
stormwater, which are pumped and directed towards the sedimentation tank for
treatment. The treated water shall be directed to the designated discharge
point.
6.2
Under
Contract No. NE/2015/01 and NE/2015/02, a total of 14 and 29 coral colonies
were tagged and translocated respectively from the Donor Site to the Recipient
Site in November 2016. Ten (10) corals at the Recipient Site were also tagged
by each Contract as reference for post-translocation monitoring.
6.3
The
post-translocation coral monitoring shall be conducted once every 3 months
after completion for a period of 12 months. Location of post-translocation coral
monitoring is shown in Figure 7. The
fourth post-translocation coral monitoring was carried out on 07 November 2017.
No further monitoring is required.
7.1
According to the EP Conditions and EM&A Manual, monitoring of vibration
impacts was conducted when the construction works are less than 100m from the
Built Heritage in close proximity of the worksite, namely the Cha Kwo Ling Tin
Hau temple. Tilting and settlement monitoring should be applied on the Cha Kwo
Ling Tin Hau Temple. Construction works less than 100m from the Cha Kwo Ling
Tin Hau temple commenced on 8 May 2017.
7.2
As
stated in the “Built Heritage Mitigation Plan” for this Project, during
the period of the construction works conducted within 100m from the Cha Kwo
Ling Tin Hau Temple, monitoring on settlement and tilting will be conducted
once a day for the Cha Kwo Ling. Monitoring of vibration will be conducted
during blasting at Cha Kwo Ling area once a day. When there is no blasting to be conducted at
the area, vibration monitoring at the Cha Kwo Ling Tin Hau Temple will be
conducted once per day when there are piling works or rock breaking works
within the 100m from the Cha Kwo Ling Tin Hau Temple.
7.3
One
vibration monitoring point and three building settlement monitoring points were
proposed for monitoring of the cultural heritage. The building settlement markers were placed
on the wall on three sides of the Temple, except the front, of the Cha Kwo Ling
Tin Hau Temple and the vibration monitoring point is located within the Cha Kwo
Ling Tin Hau Temple. Monitoring Location is shown in Figure 8.
7.4
Building settlement is measured via a settlement
marker attached to the wall of Cha Kwo Ling Tin Hau Temple by adhesive tape.
7.5
Vibration
monitoring was conducted by using vibrographs: Minimate Plus manufactured by
Instantel. These vibrographs will be
calibrated annually and its performance follows the requirements given in the “Guidance
Note on Vibration Monitoring” (GN-VM) issued by the Civil Engineering and
Development Department, which is based on the Performance Specification for
Blasting Seismographs by International Society of Explosive Engineers (ISEE
(2000)).
7.6
Table 7.1 summarizes the equipment employed by the Contractor for cultural heritage monitoring. Copies of calibration certificates are attached in Appendix
B.
Table 7.1 Cultural Heritage
Monitoring Equipment
|
Equipment |
Manufacturer and Model |
Quantity |
|
Digital Level for tilting |
Leica LS15 Serial No.: 701141 |
1 |
|
Digital Caliper for tilting |
Mitutoyo CD-6” ASX Serial No.: A17047921 |
1 |
|
iCivil-1011 Inclinometer for building settlement |
iCivil-1011 Inclinometer Serial No.: HK110118 / HK110120 |
2 |
|
Vibrographs for vibration monitoring |
MiniMate Plus / MicroMate manufactured by Instantel Model No.: 716A0403 / 721A2501 |
33 |
7.7
Vibrograph
(velocity seismograph) was deployed at each monitoring station to measure and
record the PPV and amplitude of ground motion in three mutually perpendicular
directions. Vibration monitoring equipment fulfils the requirements stated in
the Government guidelines and is calibrated to HOKLAS standards. Each
monitoring would not be more than 10 minutes. Settlement monitoring should be
conducted by surveyors manually.
Alert, Alarm and Action Levels
7.8
The
Alert, Alarm and Action (AAA) Levels are given in Table 7.2.
Table 7.2 AAA Levels for
Monitoring for Cultural Heritage
|
Parameter |
Alert Level |
Alarm Level |
Action Level |
|
Vibration |
ppv: 4.5 mm/s |
ppv: 4.8 mm/s |
ppv: 5mm/s Maximum Allowable Vibration Amplitude:
0.1mm |
|
Building Settlement Markers |
6mm |
8mm |
10mm |
|
Building Tilting(1) |
1:2000 |
1:1500 |
1:1000 |
(1)
Building tilting measurement was replaced by building settlement point
measurement. The tilting can be calculated by the ratio of the maximum
settlement difference between 2 points and the distance between the 2 points.
7.9
In the reporting month, cultural heritage
monitoring was carried out by the Contractor at the aforesaid location on 26 occasions.
No AAA Level exceedance was recorded in the reporting month. The monitoring
results are presented in Appendix T.
Mitigation Measures for Cultural Heritage
7.10
According
to Condition 3.6 of the EP (EP No.: EP-458/2013/C), to prevent damage to Cha Kwo Ling Tin Hau
Temple and its Fung Shui rocks (Child-given rocks) during the construction
phase, a temporarily fenced-off buffer zone (Rocks
buffer zone is 5 m from the edge of Rocks and 15m from the edge of Rocks alter)
with allowance for public access (minimum 1 m) around the temple and the Fung Shui rocks shall be provided. The open yard in front of the temple should
be kept as usual for annual Tin Hau festival.
7.11
As
there is a large buffer distance from the current works to Cha Kwo Ling Tin Hau Temple and the Fung Shui rocks (Child-given rocks), the temporarily fenced-off rocks buffer zone and from the edge of Rocks alter is not required. The fenced-off rocks buffer zone would be implemented
when there is construction activities in vicinity of the cultural heritage.
8.1
Landscape
and visual mitigation measures during the construction phase shall be checked
to ensure that they are fully realized and implemented on site.
8.2
Site audits were carried out on a weekly basis to
monitor and audit the timely implementation of landscape and visual mitigation
measures listed in “Implementation Schedule and Recommended Mitigation Measures” (shown in Appendix N). The summaries of observations and
recommendations related to landscape and visual impacts, if any, are shown in Appendix L.
8.3
No non-compliance of the landscape and visual
impact was recorded in the reporting month.
9.1
In
accordance with the EM&A Manual, monitoring of landfill gas is required for
construction works within the Sai Tso Wan Landfill Consultation Zone during the
construction phase. This section presents the results of landfill gas
measurements performed by the Contractor.
Appendix A shows the Limit
Levels for the monitoring works.
9.2
The
“Landfill Gas Monitoring Proposal”, including the monitoring programme and
detailed actions, is submitted to the EPD for approval. Details of monitoring in this
Proposal is in line with the monitoring requirements stipulated in the EM&A
Manual.
Monitoring Parameters and Frequency
9.3
Monitoring
parameters for Landfill gas monitoring include Methane, Carbon dioxide and
Oxygen.
9.4
According
to the implementation schedule and recommended mitigation measures of the
EM&A Manual, measurements of the following frequencies should be carried
out:
Excavations
deeper than 1m
Ÿ
at the ground surface before excavation commences;
Ÿ
immediately before any worker enters the
excavation;
Ÿ
at the beginning of each working day for the entire
period the excavation remains open; and
Ÿ
periodically throughout the working day whilst
workers are in the excavation.
Excavations
between 300mm and 1m deep
Ÿ
directly after the excavation has been completed;
and
Ÿ
periodically whilst the excavation remains open.
For
excavations less than 300mm deep
Ÿ
monitoring may be omitted, at the discretion of the
Safety Officer or other appropriately qualified person
9.5
Monitoring
of oxygen, methane and carbon dioxide was performed for excavations at 1m depth
or more within the Consultation Zone. In
this reporting month, the area required to be monitored for landfill gas are
shown below and Figure 6 shows the
landfill gas monitoring locations.
Ø Excavation Locations : Portion III
Ø Manholes and Chambers : N/A
Ø Relocation of monitoring wells : N/A
Ø
Any
other Confined Spaces : N/A
Monitoring Equipment noise mitigation
9.6
Table 9.1 summarizes the equipment employed by the Contractor for the landfill
gas monitoring.
Table 9.1 Landfill
Gas Monitoring Equipment
|
Equipment |
Model and Make |
Quantity |
|
Portable gas detector |
ALTAIR 5X Multigas Detector (Serial No. 137333) |
1 |
9.7
In
the reporting month, landfill gas monitoring was carried out by the Contractor
at the aforesaid locations on 130 occasions. No Limit Level exceedance for
landfill gas monitoring was recorded in the reporting month. The monitoring
results are provided in Appendix R.
Copies of calibration certificates are attached in Appendix B.
10.1
Site
audits were carried out on a weekly basis to monitor the timely implementation
of proper environmental management practices and mitigation measures in the
Project site. The summaries of site
audits are attached in Appendix L.
10.2
Joint
weekly site audits by the representatives of the Engineer, Contractor and the
ET were conducted in the reporting month as shown in below:
Ÿ Contract No. NE/2015/01: 5, 12, 20,
27
Ÿ Contract No. NE/2015/02: 6, 14, 20,
27
Ÿ Contract No. NE/2017/01: 6, 14, 20,
27
Ÿ Contract No. NE/2017/02: 6, 14, 20,
27
Ÿ Contract No. NE/2017/06: 6, 14, 20,
27
Ÿ Contract No. NE/2017/07: 5, 12, 18,
26
10.3 Monthly joint site inspection with the representative of IEC was conducted for NE/2015/01 on 27 Jun 2021, NE/2017/07 on 26 Jun 2021; while NE/2015/02, NE/2017/01, NE/2017/02 and NE/2017/06 were conducted on 14 April 2021.
10.4 The EM&A programme of Contract No. NE/2015/03 had been terminated on 21 April 2020 under the approval of EPD.
10.5
According
to the EIA Study Report, Environmental Permit and the EM&A Manual of the
Project, the mitigation measures detailed in the documents are recommended to
be implemented during the construction phase. An updated summary of the
Implementation Schedule and Recommended Mitigation Measures is provided in Appendix N.
10.6
During
site inspections in the reporting month, no non-compliance was recorded on reporting month. The
observations and recommendations made during the audit sessions are summarized
in Appendix L.
11.1
Waste generated from this
Project includes inert construction and demolition (C&D) materials,
non-inert C&D materials and marine sediments. Inert C&D waste includes
soil, broken rock, broken concrete and building debris, while non-inert C&D
materials are made up of C&D waste which cannot be reused or recycled and
has to be disposed of at the designated landfill sites. Marine sediment shall be expected from excavation and dredging works of
this Project.
11.2
With reference to relevant
handling records of this Project, the quantities of different types of waste
generated in the reporting month are summarised and presented in Appendix P.
11.3
The
Contractors are advised to minimize the wastes generated through the recycling
or reusing. All mitigation measures stipulated in the approved EM&A Manual
and waste management plans shall be fully implemented. The status of
implementation of waste management and reduction measures are summited in Appendix N.
12.1
1
(One) Action Level exceedances of noise were recorded due to the documented
complaints received in the reporting month. No Limit Level exceedances of construction
noise monitoring were recorded in the reporting month.
12.2
Thirty-two (32) Action Level and one-hundred-and-twelve (112) Limit Level exceedances were
recorded in Monitoring Stations (M) during marine water quality monitoring.
12.3
Actions
carried out in accordance with the Event and Action Plans in Appendix M are presented in Appendix K – Summary of Exceedance.
12.4
Four (4) environmental complaints were received in the reporting month. The
Cumulative Complaint Log is presented in Appendix
O. The investigation status and
result is also reported in Appendix O.
12.5
No
notification of summon or successful environmental prosecution was received in
this reporting period. The Cumulative Log for environmental summon and
successful prosecution since the commencement of the Project is presented in Appendix O.
13.1
Tentative
construction programmes for the next three months are provided in Appendix Q.
13.2
Major
site activities to be undertaken for the next reporting period are summarized
in Table 13.1.
Table 13.1 Summary Table for
Site Activities in the next Reporting Period
|
Site Activities (May 2021) |
Key Environmental Issues * |
||
|
NE/2015/01 - Tseung Kwan O – Lam Tin Tunnel – Main
Tunnel and Associated Works |
Lam Tin Interchange |
1) EHC2 U-Trough 2) Site Formation –
Area 1G1, Area 1G2, Area 2 & Area 5 3) Site Formation –
Slope stabilization & Retaining Wall 4) Administration
Building, West Ventilation Building & Bridge Construction 5) Stormwater Tank
Construction 6) S01_2, EHC1&4
Construction 7) CKLR Underground
Utilities 8)
Landscape Deck |
(A) / (C) / (D) /
(E) / (F) / (I) |
|
Main Tunnel |
9) S02_2 Excavation 10)
Main Tunnel Lining Works |
(B) |
|
|
TKO Interchange |
11) Bridge
Construction 12)
East Ventilation Building |
(A) / (C) / (D) /
(E) / (F) / (I) |
|
|
NE/2015/02 -
Tseung Kwan O – Lam Tin Tunnel – Road P2 and Associated Works |
1)
Construction of pillar box and ducting
system at Portion IV adjacent to Ocean Shores EVA 2)
Site formation at Road P2 CH500-CH650 and
SR1 3)
Road and drainage works at Road P2 CH500 –
650, slip road SR1 footpath and cycle track, slip road SR2 CH250 – CH350 4)
ELS at underpass P2 CH105 – CH318 5)
4th of excavation at CH105 – CH318
cofferdam 6)
Excavation/ELS at CH821 – CH105 Cofferdam 7)
Installation of socketed H-pile at CT01 CH117
– CH336 8)
Reinstatement of Tong Yin Street 9)
Installation of de-watering system at
CH821 – CH105 10)
Excavation & ELS installation works at
CH821 – CH105 11)
Construction of U-tough at CH821 – CH105 12)
Drainage works at U-trough CH318 –
CH363.50 13)
Pre-bore/ELS works for U-trough CH363.50 –
CH411/U-trough SR2 CH110-CH170 14)
Construction of profile barrier at
U-trough CH318 – CH363.50 15)
Construction of sloping seawall 16)
Removal of temporary cofferdam 17)
Construction of seawall coping 18)
Drainage works at SR1 footpath / cycle
truck 19)
Installation of ELS at cofferdam CH105 –
CH318 20)
Backfilling works for reinstatement of
Tong Yin Street 21)
Construction of U-trough at CH821 – CH 105
Cofferdam 22)
Excavation and re-compaction at S100 CH280
– S200 CH755 and S300 CH405 – CH326 23)
Waterworks – DN300/PE315 24)
RC Structure works for U-trough A-B 25) RC
Structure works for U-trough C 26) Construction
of Site Hull Road adjacent to SR2 CH110 – CH170 |
(A) / (B) / (C) /
(D) / (E) / (G) / (I) |
|
|
NE/2015/03 - Tseung Kwan O – Lam Tin Tunnel –
Northern Footbridge |
The construction works under the contract had been
completed in December 2019. Materials are being removed from works area. |
N/A |
|
|
NE/2017/01 – Tseung Kwan O Interchange and
Associated Works |
1)
Construction of
Pier 2)
Construction of
Pier Head works 3)
Segment
erection works 4)
Construction of Bridge Decks 5)
Installation of Parapet Skin |
(A) / (B) / (E) /
(F) / (G) |
|
|
NE/2017/02 –Tseung Kwan O - Lam Tin Tunnel - Road
P2/D4 and Associated Works |
1)
Inspection pit excavation and utility diversion
works 2)
Construction of drainage and watermain 3)
Asphalt Paving 4)
Pier, Staircase and Lift Shalt Construction 5)
Road Works |
(A) / (B) / (E) /
(F) / (G) |
|
|
NE/2017/06 – Tseung Kwan O – Lam Tin Tunnel –
Traffic Control and Surveillance System(TCSS) and Associated Works |
1)
System Integration Test 2)
Goods arrival & storage on site 3)
Installation works at Admin Building 4)
Installation works at Tunnel |
(E) |
|
|
NE/2017/07 - Cross Bay Link, Tseung Kwan O – Main
Bridge and Associated Works |
1)
Fabrication
work for precast pier 2)
Preparation for
Rolling out for Precast Box Girder 3)
Jointing deck
segments 4)
Dismantle of
temporary support towers and loading out steel main bridge to barge 5)
Preparation of
temporary support tower 6)
Fabrication of
Precast Segment and Precast Shell 7)
Pre-drilling 8)
Bored piling |
(A) / (B) / (D) /
(E) / (F) / (G) / (H) / (I) |
|
Note:
(A)
Watering for dust generation from haul road,
stockpiles of dusty materials, exposed site area, excavation works and rock
breaking activities;
(B)
Noisy construction activity such as rock-breaking
activities and piling works;
(C)
Runoff from exposed slope or site area;
(D)
Wastewater and runoff discharge from site;
(E)
Accumulation of silt, mud and sand along U-channels
and sedimentation tanks;
(F)
Set up and implementation of temporary drainage system
for the surface runoff;
(G)
Storage of chemicals/fuel and chemical waste/waste oil
on site;
(H)
Accumulation and storage of general and construction
waste on site; and
(I)
Marine water quality impact and indirect
impact to coral communities due to marine construction for TKO-LTT reclamation.
13.3
Key
environmental issues in the coming month include:
·
Watering
for dust generation from haul road, stockpiles of dusty materials, exposed site
area, excavation works and rock breaking activities;
·
Noisy
construction activity such as rock-breaking activities and piling works;
·
Runoff
from exposed slope or site area;
·
Wastewater
and runoff discharge from site;
·
Accumulation
of silt, mud and sand along U-channels and sedimentation tanks;
·
Set
up and implementation of temporary drainage system for the surface runoff;
·
Precaution
measures in case of heavy rainfall brought along by typhoon;
·
Storage
of chemicals/fuel and chemical waste/waste oil on site;
·
Accumulation
and storage of general and construction waste on site; and
·
Marine
water quality
impact and indirect impact to coral communities due to marine construction for
TKO-LTT reclamation.
14.1
This
is the 55th Environmental Monitoring and Audit (EM&A) Report
which presents the EM&A works undertaken during the period in May 2021 in
accordance with EM&A Manual and the requirement under EP.
Air Quality Monitoring
14.2
No
Action/Limit Level exceedance for 1-hour TSP monitoring was recorded.
14.3
No
Action/Limit Level exceedance for 24-hour TSP monitoring was recorded.
Construction Noise Monitoring
14.4
One
(1) Action Level exceedances were recorded due to the documented complaints
received in this reporting month.
14.5
No
Limit Level exceedances was recorded for daytime/evening-time construction
noise in the reporting month. One (1) limit level exceedances were recorded for
night-time.
Water Quality Monitoring
14.6
Groundwater
quality monitoring had been suspended since October 2019. Details shall be
referred to Section 5.1.
14.7
Thirty-two (32) Action Level and
one-hundred-and-twelve (112) Limit Level exceedances were recorded in Monitoring
Stations (M) during marine water quality monitoring.
14.8
Tunnel
construction activities are within +/- 50m of the piezometer gate in plan.
Construction phase daily piezometer monitoring by the Contractor commenced in
June 2018. It has switched to monthly basis since 3 October
2018 as the construction activity was 120m away from the piezometer gate. No
monitoring was conducted in the reporting month.
Ecological Monitoring
14.9
The
post-translocation coral monitoring surveys were completed in November 2017.
Monitoring on Cultural Heritage
14.10 No Alert Alarm and Action (AAA)
Level exceedance of cultural heritage monitoring on cultural
heritage was recorded in the reporting month.
Landscape and Visual Monitoring and Audit
14.11 No non-compliance of the landscape and
visual impact was recorded in the reporting month.
Landfill Gas Monitoring
14.12 Monitoring of landfill gases in the
reporting month was carried
out by the Contractor at excavation
location, Portion III. No Limit Level exceedance was
recorded.
Environmental Site Inspection
14.13 Joint weekly site inspections were
conducted by representatives of the Contractor, Engineer and Environmental
Team. During site inspections in the reporting month, no
non-compliance was identified. The environmental
deficiency observed during the reporting month are shown in Appendix L.
Complaint, Prosecution and Notification of
Summons
14.14 Four (4) environmental
complaints, no successful prosecution and notification of summon were received
during the reporting period.
14.15 The following recommendations were
made to the Contractor for the reporting month:
Air Quality Impact
·
To
regularly apply watering on dry surface should be applied to minimize erosion.
·
To
aim the water spray at the rock breaking point for effective dust suppression.
·
To water materials before loading/unloading.
·
To
turn off idle equipment.
Construction Noise
·
To provide sufficient noise barriers for noisy PMEs
as practically at LTI according to CNMP.
·
To
repair the gaps between the noise barriers.
·
To place compatible noise barrier close to the
breaking point for effective noise screening.
·
To erect sound proof canvases on derrick lighter
barge
Water Quality Impact
·
To clear the oil slick
and check for any damage of the silt curtain.
·
To
repair damaged or missing silt curtain
·
To check whether the curtain has been set to the
seabed.
·
To ensure that the pumping rate of bored pile is
sufficient to avoid discharging waste water into the sea.
·
To
clear floating refuse between the cofferdam and silt curtain.
·
To clear oil slick within and outside cofferdam.
·
To
control the amount of loading materials in the barge to avoiding spillage.
·
To
cover stockpile near seafront.
·
To
remove wastewater and oil in drip tray.
·
To
remove pond/still water.
Waste/Chemical Management
·
To bund or lock the chemical storage area.
·
To clear dripping oil from bored piling machine.
·
To clear oil slick on seawater.
·
To clear oil on the floor.
Landscape and Visual
·
To
avoid placing any construction materials in the tree protection zone.