CONTENTS
1.4 Summary of Construction Activities
1.5 Summary of EM&A Programme Requirements
1.6 Status of Other Statutory Environmental Requirements
2.1 Environmental Site Inspection
2.3 Marine Water Quality Monitoring
2.3.2 Action and Limit Levels for Marine Water Quality Monitoring
2.3.3 Monitoring Schedule for the Reporting Period
2.4 Pilot Test on the Efficiency of Silt Curtain System
2.4.3 Evaluation of Pilot Test
2.5 Marine Mammal Exclusion Zone Monitoring
2.6 Records of Operating Speeds and Marine Travel Routes of Working Vessels
2.7 Implementation Status of Environmental Mitigation Measures
2.8 Summary of Exceedances of the Environmental Quality Performance Limit
2.9 Summary of Environmental Complaints, Notification of Summons and Successful Prosecutions
3....... forecast for the next reporting period
3.1 Works Programme for the Next Reporting Period
3.2 Monitoring Schedule for the Next Reporting Period
4....... Conclusion and recommendations
Annexes
Annex B Construction Programme
Annex C Environmental Mitigation Implementation Schedule (EMIS)
Annex D Status of Statutory Environmental Requirements
Annex E Waste Management Checklist
Annex G Construction Phase Marine Water Quality Monitoring Results
Annex H Calibration Certificates for Marine Water Quality Monitoring Equipment
Annex I Event and Action Plan for Marine Water Quality Monitoring
Annex J Marine Water Quality Monitoring Results for Silt Curtain Pilot Test
Annex L Monitoring Schedule for the Reporting Period
Annex M Tentative Schedule for the Next Reporting Period
Annex N Records of Operating Speeds and Marine Travel Routes of Working Vessels
List of Tables
Table 1.1 Contact Information of Key Personnel
Table 1.2 Major Construction Activities Undertaken in the Reporting Period
Table 1.3 Summary of Status for the EM&A Programme under the Updated EM&A Manual
Table 2.1 Key Observations from Site Inspections and Contractor’s Follow-up Actions
Table 2.2 Quantities of Waste Generated for FEP-01/558/2018/A
Table 2.3 Quantities of Waste Generated and Dredged Marine Sediment for FEP-02/558/2018/A
Table 2.4 Quantities of Waste Generated and Dredged Marine Sediment for FEP-03/558/2018/A
Table 2.5 Location of Marine Water Quality Monitoring Stations
Table 2.6 Action and Limit Levels for Marine Water Quality Monitoring
Table 2.7 Details of the Marine Water Quality Monitoring.
Table 2.8 Marine Water Quality Monitoring Equipment
Table 2.9 Efficiency of Cage-type Silt Curtain for Dredging Operation
Table 2.10 Marine Mammal Exclusion Zone Requirements
Table 3.1 Major Construction Activities for the Next Reporting Period
List of Figures
Figure 1.1 Indicative Location of Key Project Components
Figure 1.2 Location and Works Area of GRS at BPPS
Figure 1.3 Location and Works Area of GRS at LPS
Figure 2.1 Marine Water Quality Monitoring Location
Figure 2.2 Monitoring Locations for Silt Curtain Pilot Test for Dredging Operation
To support the increased use of natural gas in Hong Kong from 2020 onwards, Castle Peak Power Company Limited (CAPCO) and The Hongkong Electric Co., Ltd. (HK Electric) have identified that the development of an offshore liquefied natural gas (LNG) receiving terminal in Hong Kong using Floating Storage and Regasification Unit (FSRU) technology (‘the Project’) presents a viable additional gas supply option that will provide energy security through access to competitive gas supplies from world markets. The Project will involve the construction and operation of an offshore LNG import facility to be located in the southern waters of Hong Kong, a double berth jetty, and subsea pipelines that connect to the gas receiving stations (GRS) at the Black Point Power Station (BPPS) and the Lamma Power Station (LPS). To demarcate the works between different parties, the following Further Environmental Permits (FEPs) were issued for the Project:
§ the double berth jetty at LNG Terminal under the Hong Kong LNG Terminal Limited (HKLTL), joint venture between CAPCO and HK Electric (FEP-01/558/2018/A) – construction commenced on 27 November 2020;
§ the subsea gas pipeline for the BPPS and the associated GRS in the BPPS under CAPCO (FEP-03/558/2018/A) – construction commenced on 23 September 2020; and
§ the subsea gas pipeline for the LPS and the associated GRS in the LPS under HK Electric (FEP-02/558/2018/A) – construction commenced on 13 December 2020.
This is the Monthly EM&A Report presenting the EM&A works carried out during the period from 1 to 28 February 2021 for the Project in accordance with the Updated EM&A Manual. A summary of monitoring and audit activities conducted in the reporting period is listed below:
|
Activities |
Number of Sessions |
|
For FEP-02/558/2018/A |
|
|
Marine Water Quality Monitoring |
7 |
|
Marine Mammal Exclusion Zone Monitoring |
During dredging / jetting operations for construction of LPS Pipeline |
|
Pilot Test on the Efficiency of Silt Curtain System – Cage-type Silt Curtain for Dredging Operation |
1 |
|
Environmental Site Inspection |
3 |
|
For FEP-03/558/2018/A |
|
|
Environmental Site Inspection |
1 |
Environmental auditing works, including regular site inspections of construction works conducted by the ET, audit of implementation of Waste Management Plan and review of the acceptability of operating speeds and marine travel routes of working vessels were conducted in the reporting period. No non-compliance of environmental statutory requirements was identified.
Breaches of Action and Limit Levels
There were no breaches of Action and Limit Levels for marine water quality monitoring in the reporting period.
Since there were no construction activities conducted in the reporting period requiring impact monitoring of marine mammal in accordance with the Updated EM&A Manual, there were no breaches of Action and Limit Levels for marine mammal monitoring in the reporting period.
Environmental Complaints, Notification of Summons and Successful Prosecution
There were no environmental complaints, notification of summons and successful prosecutions recorded in the reporting period.
Reporting Changes
There were no reporting changes in the reporting period.
Forecast of Impact Predictions
As informed by the Contractor, construction activities to be undertaken in the next reporting period of March 2021 include the following:
|
FEP |
Land-based Works |
Marine-based Works |
|
FEP-01/558/2018/A |
§ Nil |
§ Nil |
|
FEP-02/558/2018/A |
§ Nil |
§ De-burial (pre-trenching) of pre-installed pipeline by Mass Flow Excavator (1); and § Pipe-laying |
|
FEP-03/558/2018/A |
§ Excavation for box culvert; § Construction of reinforced concrete foundation; § Underground drainage works; and § Drainage installation |
§ Nil |
Remark: (1) Mass flow excavator is a variance of jetting machine.
Potential environmental impacts arising from the above upcoming construction activities in the next reporting period of March 2021 are mainly associated with dust emission from construction activities and stockpiles, waste management, site surface runoff, wastewater discharge, and elevation in suspended solids and disturbance to marine mammals due to marine-based works.
To support the increased use of natural gas in Hong Kong from 2020 onwards, Castle Peak Power Company Limited (CAPCO) and The Hongkong Electric Co., Ltd. (HK Electric) have identified that the development of an offshore liquefied natural gas (LNG) receiving terminal in Hong Kong using Floating Storage and Regasification Unit (FSRU) technology (‘the Project’) presents a viable additional gas supply option that will provide energy security through access to competitive gas supplies from world markets. The Project will involve the construction and operation of an offshore LNG import facility to be located in the southern waters of Hong Kong, a double berth jetty, and subsea pipelines that connect to the gas receiving stations (GRS) at the Black Point Power Station (BPPS) and the Lamma Power Station (LPS).
The Environmental Impact Assessment (EIA) Report for the Project was submitted to the Environmental Protection Department (EPD) of the HKSAR Government in May 2018. The EIA Report (EIAO Register No. AEIAR-218/2018) was approved by EPD and the associated Environmental Permit (EP) (EP-558/2018) was issued in October 2018.
An application for Further Environmental Permits (FEP) were made on 24 December 2019 to demarcate the works between the different parties. The following FEPs were issued on 17 January 2020 and the EP under EP-558/2018 was surrendered on 5 March 2020.
§ the double berth jetty at LNG Terminal under the Hong Kong LNG Terminal Limited (HKLTL), joint venture between CAPCO and HK Electric (FEP-01/558/2018/A) ([1]) – construction commenced on 27 November 2020;
§ the subsea gas pipeline for the BPPS and the associated GRS in the BPPS under CAPCO (FEP-03/558/2018/A) ([2]) – construction commenced on 23 September 2020; and
§ the subsea gas pipeline for the LPS and the associated GRS in the LPS under HK Electric (FEP-02/558/2018/A) ([3]) – construction commenced on 13 December 2020.
The location of these components is shown in Figures 1.1, 1.2 and 1.3.
This is the Monthly EM&A Report for the Project which summarises the key findings of the EM&A programme during the reporting period from 1 to 28 February 2021 for the construction works for the Project in accordance with the Updated EM&A Manual and the requirements of the Further Environmental Permits (FEP-01/558/2018/A, FEP-02/558/2018/A & FEP-03/558/2018/A).
The organisation structure of the Project is shown in Annex A. The key personnel and contact details are summarised in Table 1.1 below.
Table 1.1 Contact Information of Key Personnel
|
Party |
Position |
Name |
Telephone |
|
CAPCO / HKLTL (For FEP-01/558/2018/A and FEP-03/558/2018/A)
|
Senior Environmental Manager |
Dr Helen Chiu |
2596 4116 |
|
HK Electric / HKLTL (For FEP-01/558/2018/A and FEP-02/558/2018/A)
|
Head of Mechanical Engineering, Projects Division
|
Norman Chan
|
3143 3819
|
|
Environmental Team (ET) (ERM-Hong Kong, Limited)
|
ET Leader
|
Raymond Chow
|
2271 3114 |
|
Independent Environmental Checker (IEC) (Mott MacDonald Hong Kong Limited)
|
IEC
|
Arthur Lo
|
2828 5757 |
|
Contractor (CNOOC Offshore Oil Engineering Co. Ltd.) |
Environmental Manager |
H Y Tang |
6111 5789
|
|
Environmental Officer |
Kelvin Cheung |
9060 1020 |
The programme of the construction is shown in Annex B.
As informed by the Contractor, details of the major construction activities undertaken in the reporting period are listed in Table 1.2 below:
Table 1.2 Major Construction Activities Undertaken in the Reporting Period
|
FEP |
Land-based Works |
Marine-based Works |
|
FEP-01/558/2018/A |
§ Nil |
§ Nil |
|
FEP-02/558/2018/A |
§ Nil |
§ Dredging works; § De-burial (pre-trenching) of pre-installed pipeline by Mass Flow Excavator (1) § Pipe-laying |
|
FEP-03/558/2018/A |
§ Excavation for Foundation and Box Culvert; § Construction of reinforced concrete foundation; and § Underground drainage works |
§ Nil |
Remark: (1) Mass flow excavator is a variance of jetting machine.
The environmental mitigation implementation schedule (EMIS) is presented in Annex C.
The status of EM&A Programme for all environmental aspects required under the Updated EM&A Manual are presented in Table 1.3. As no percussive piling works were undertaken in the reporting period, no marine mammal monitoring, including vessel-based line transect surveys and passive acoustic monitoring was required to be monitored in accordance with the Updated EM&A Manual. The requirements of relevant environmental monitoring, including monitoring parameters, Action and Limit Levels, Event and Action Plan(s), environmental mitigation measures, etc. are presented in Section 2.
Table 1.3 Summary of Status for the EM&A Programme under the Updated EM&A Manual
|
Aspects |
Relevant FEP(s) |
Status |
|
Water Quality |
||
|
Baseline Monitoring |
FEP-01/558/2018/A FEP-02/558/2018/A FEP-03/558/2018/A |
§ Completed |
|
Efficiency of Silt Curtain System |
FEP-02/558/2018/A FEP-03/558/2018/A |
§ Completed for cage-type silt curtain for dredging operation (under FEP-02/558/2018/A) § To be implemented upon early stage of construction works for dredging / jetting operations for FEP-02/558/2018/A and FEP-03/558/2018/A |
|
Construction Phase Monitoring |
FEP-02/558/2018/A FEP-03/558/2018/A |
§ On-going for dredging / jetting operations for FEP-02/558/2018/A § To be implemented upon commencement of construction works for dredging / jetting operations for FEP-03/558/2018/A |
|
Post-Construction Monitoring |
FEP-02/558/2018/A FEP-03/558/2018/A |
§ To be implemented upon completion of construction works for the Project |
|
Monitoring for Hydrotesting for the Subsea Gas Pipelines |
FEP-02/558/2018/A FEP-03/558/2018/A |
§ To be implemented during hydrotesting for the subsea gas pipelines |
|
First-year of LNG Terminal Operation |
FEP-01/558/2018/A |
§ To be implemented during LNG Terminal operation |
|
Maintenance Dredging |
FEP-01/558/2018/A |
§ To be implemented during maintenance dredging |
|
Waste Management |
||
|
Audit of Waste Management Practice |
FEP-01/558/2018/A FEP-02/558/2018/A FEP-03/558/2018/A |
§ On-going |
|
Ecology |
||
|
Baseline Monitoring (Vessel-based Line Transect Survey and Passive Acoustic Monitoring) |
FEP-01/558/2018/A
|
§ Completed |
|
Construction Phase Monitoring (Vessel-based Line Transect Survey and Passive Acoustic Monitoring) |
FEP-01/558/2018/A |
§ To be implemented when percussive piling works for construction of Jetty are undertaken |
|
Post-Construction Monitoring (Vessel-based Line Transect Survey and Passive Acoustic Monitoring) |
FEP-01/558/2018/A |
§ To be implemented upon completion of construction works for the Project |
|
Marine Mammal Exclusion Zone Monitoring |
FEP-01/558/2018/A FEP-02/558/2018/A FEP-03/558/2018/A |
§ On-going for marine dredging / jetting operations for FEP-02/558/2018/A (marine mammal exclusion zone with 250 m radius) § To be implemented when percussive piling works for construction of Jetty (under FEP-01/558/2018/A) or marine dredging / jetting operations (under FEP-03/558/2018/A) are undertaken |
|
Environmental Site Inspection |
||
|
Regular Site Inspection |
FEP-01/558/2018/A FEP-02/558/2018/A FEP-03/558/2018/A |
§ On-going |
|
Records of Operating Speeds and Marine Travel Routes for Working Vessels |
FEP-01/558/2018/A FEP-02/558/2018/A FEP-03/558/2018/A |
§ On-going for FEP-02/558/2018/A § To be implemented when marine-based works are undertaken for FEP-01/558/2018/A and upon commencement of marine-based construction works for FEP-03/558/2018/A |
|
Environmental Log Book |
FEP-01/558/2018/A FEP-02/558/2018/A FEP-03/558/2018/A |
§ On-going
|
The environmental licenses and permits, including further environmental permits, registration as chemical waste producer, construction noise permits, which were valid in the reporting period are presented in Annex D. No non-compliance with environmental statutory requirements was identified.
The EM&A programme for the Project required environmental monitoring for marine water quality and marine mammals as well as environmental site inspections for air quality, construction noise, water quality, waste management, marine ecology, landscape and visual, and hazard to life impacts. As presented in Section 1.5, environmental site inspections and/or audit on waste management practice were conducted for FEP-01/558/2018/A, FEP-02/558/2018/A and FEP-03/558/2018/A while marine water quality monitoring, pilot test on the efficiency of silt curtain system and marine mammal exclusion zone monitoring with 250 m radius were conducted for FEP-02/558/2018/A, and the findings are presented below.
Regular environmental site inspections were carried out with the Contractor and Project Proponents to confirm the implementation of appropriate environmental protection and pollution control mitigation measures for air quality, construction noise, water quality, waste management, marine ecology, landscape and visual, and hazard to life impacts under the Project. In the reporting period, four (4) environmental site inspections were carried out on 2, 11, 17 and 23 February 2021. The Independent Environmental Checker (IEC) attended the environmental site inspection as the IEC audit on 11 February 2021 during the reporting period. The key observations from site inspections and Contractor’s follow-up actions are summarised in Table 2.1. The environmental mitigation implementation schedule (EMIS) is presented in Annex C.
Table 2.1 Key Observations from Site Inspections and Contractor’s Follow-up Actions
|
Item |
Description |
Contractor’s Follow-up Action(s) Taken |
|
FEP-02/558/2018/A |
||
|
1 |
Reminder: The Contractor was reminded to review and control the operating speed of the grab dredger while lifting up the grab in order to prevent the excavated sediment from being left behind on the buoyance frame of the cage-type silt curtain and/or at the edge of the hopper barge. |
The excavated sediment left on the buoyance frame of cage-type silt curtain and/or at the edge of the hopper barge was removed. |
|
2 |
Reminder: Dark smoke emission from the engine for mass flow excavation situated on the support vessel at the start of operation was observed and the exhaust smoke in white was emitted during the course of operation as normal. The Contractor was reminded to regularly maintain all on-site plants and/or equipment for construction in a good condition. |
On-site plants and/or equipment for construction were maintained accordingly. |
|
FEP-03/558/2018/A |
||
|
3 |
Copies of updated Further Environmental Permit (i.e. FEP-03/558/2018/A) were not displayed at various locations within the construction site. |
Copies of updated FEP were displayed accordingly. |
|
4 |
Reminder: The Contractor was reminded to cover temporary stockpiles of dusty materials with impervious sheets while being idle. |
The temporary stockpiles were covered by impervious sheets. |
Waste management audits were performed with reference to the Waste Management Checklists for the corresponding Waste Management Plans detailed in Annex E during the regular environmental site inspections carried out in the reporting period. No non-compliance for Contractor’s waste management practices was identified during the audits.
The quantities of different types of waste generated and dredged marine sediment for the three FEPs are summarised in Tables 2.2, 2.3 and 2.4 with reference to the waste flow tables prepared by the Contractor. General refuse and marine sediments, and inert C&D materials (public fill) were generated under FEP-02/558/2018/A and FEP-03/558/2018/A, respectively, in the reporting period. Detailed waste flow tables are presented in Annex F.
Table 2.2 Quantities of Waste Generated for FEP-01/558/2018/A
|
Inert C&D Materials Generated (in ‘000kg) |
||||||
|
Month/Year |
Total Quantity Generated |
Hard Rock and Large Broken Concrete |
Reused in the Contract |
Reused in other Projects |
Disposed as Public Fill |
Imported Fill |
|
Feb 2021 |
0 |
0 |
0 |
0 |
0 |
0 |
|
C&D Wastes Generated |
||||||
|
Month/Year |
Metals (in ‘000kg3) |
Paper / Cardboard Packaging (in ‘000kg3) |
Plastics (in ‘000kg3) |
Chemical Waste |
Other (e.g. general refuse) (in ‘000kg) |
|
|
(in ‘000kg3) |
(in ‘000L) |
|||||
|
Feb 2021 |
0 |
0 |
0 |
0 |
0 |
0 |
Table 2.3 Quantities of Waste Generated and Dredged Marine Sediment for FEP-02/558/2018/A
|
Inert C&D Materials Generated (in ‘000kg) |
||||||||||
|
Month/Year |
Total Quantity Generated |
Hard Rock and Large Broken Concrete |
Reused in the Contract |
Reused in other Projects |
Disposed as Public Fill |
Imported Fill |
||||
|
Feb 2021 |
0 |
0 |
0 |
0 |
0 |
0 |
||||
|
C&D Wastes Generated |
||||||||||
|
Month/Year |
Metals (in ‘000kg3) |
Paper / Cardboard Packaging (in ‘000kg3) |
Plastics (in ‘000kg3) |
Chemical Waste |
Other (e.g. general refuse) (in ‘000kg) |
|||||
|
(in ‘000kg3) |
(in ‘000L) |
|||||||||
|
Feb 2021 |
0 |
0 |
0 |
0 |
0 |
21.500 |
||||
|
Marine Sediment Generated (in ‘000m3) |
||||||||||
|
Month/Year |
Total Quantity of Type L Generated |
Total Quantity of Type M Generated |
Reused in the Contract |
Reused in other Projects |
||||||
|
Feb 2021 |
4.388 |
0 |
0 |
0 |
||||||
Table 2.4 Quantities of Waste Generated and Dredged Marine Sediment for FEP-03/558/2018/A
|
Inert C&D Materials Generated (in ‘000kg) |
||||||||||
|
Month/Year |
Total Quantity Generated |
Hard Rock and Large Broken Concrete |
Reused in the Contract |
Reused in other Projects |
Disposed as Public Fill |
Imported Fill |
||||
|
Feb 2021 |
605.040 |
0 |
0 |
0 |
605.040 |
0 |
||||
|
C&D Wastes Generated |
||||||||||
|
Month/Year |
Metals (in ‘000kg3) |
Paper / Cardboard Packaging (in ‘000kg3) |
Plastics (in ‘000kg3) |
Chemical Waste |
Other (e.g. general refuse) (in ‘000kg) |
|||||
|
(in ‘000kg3) |
(in ‘000L) |
|||||||||
|
Feb 2021 |
0 |
0 |
0 |
0 |
0 |
0 |
||||
|
Marine Sediment Generated (in ‘000m3) |
||||||||||
|
Month/Year |
Total Quantity of Type L Generated |
Total Quantity of Type M Generated |
Reused in the Contract |
Reused in other Projects |
||||||
|
Feb 2021 |
0 |
0 |
0 |
0 |
||||||
In accordance with the Updated EM&A Manual, marine water quality monitoring shall be undertaken at the monitoring stations as shown in Figure 2.1 and Table 2.5 three times a week at both mid-ebb and mid-flood tides during periods when there are dredging / jetting operations during construction phase of BPPS Pipeline or LPS Pipeline. The interval between two sets of monitoring would not be less than 36 hours. Two replicates of in-situ measurements and samples were collected at each monitored water depth of each monitoring stations. Levels of dissolved oxygen (DO), pH value, salinity, temperature and turbidity were measured in-situ whereas the level of suspended solids (SS) were determined by a HOKLAS accredited laboratory. The detailed methodology is presented in the Updated EM&A Manual.
Table 2.5 Location of Marine Water Quality Monitoring Stations
|
Station |
Easting |
Northing |
Description |
|
Group 1 – During construction at the pipeline shore approach at LPS (KP17.4 - 18.2), West Lamma Channel (KP14.5 - 17.4) |
|||
|
IM1 |
829453 |
806896 |
Impact Station for Coastline of South Lamma |
|
IM2 |
828235 |
810347 |
Impact Station for Coastline of North Lamma |
|
E1 |
827317 |
811510 |
Control Station for Ebb Tide |
|
F1 |
827892 |
804243 |
Control Station for Flood Tide |
|
Group 2 – During construction at the Double Berth Jetty to West Lamma Channel (KP0.0 - 14.5) |
|||
|
IM3 |
820683 |
805931 |
Impact Station for Coastline of South Cheung Chau |
|
IM4 |
816997 |
805153 |
Impact Station for Coastline of South Shek Kwu Chau |
|
IM5 |
814068 |
804100 |
Boundary of Proposed South Lantau Marine Park (MP) |
|
IM6 |
814073 |
802029 |
Boundary of Proposed South Lantau MP |
|
E2 |
813367 |
808213 |
Control Station for Ebb Tide |
|
F2 |
822532 |
802161 |
Control Station for Flood Tide |
|
F3 |
815032 |
801161 |
Control Station for Flood Tide |
|
Group 3 – During construction at the Jetty Approach (KP0.0 - 5.0), South of Soko Islands (KP5.0 - 8.9), Southwest of Soko Islands (KP8.9 - 12.1) |
|||
|
IM6 |
814073 |
802029 |
Boundary of Proposed South Lantau MP |
|
IM7 |
811652 |
802029 |
Boundary of Proposed South Lantau MP |
|
IM8 |
810833 |
801430 |
Boundary of Proposed South Lantau MP |
|
IM9 |
807101 |
801595 |
Boundary of Proposed South Lantau MP |
|
E3 |
802686 |
804123 |
Control Station for Ebb Tide |
|
F3 |
815032 |
801161 |
Control Station for Flood Tide |
|
Group 4 – During construction at the Adamasta Channel (KP12.1 - 15.6), Southwest Lantau (KP15.6 - 21.3) |
|||
|
IM10 |
803145 |
806407 |
Boundary of Southwest Lantau MP |
|
IM11A |
801914 |
806510 |
Boundary of Southwest Lantau MP |
|
IM12 |
801041 |
807024 |
Boundary of Southwest Lantau MP |
|
IM13 |
800386 |
810750 |
Boundary of Southwest Lantau MP |
|
IM14 |
801376 |
810750 |
Boundary of Southwest Lantau MP |
|
E4 |
801571 |
811923 |
Control Station for Ebb Tide |
|
F4 |
809058 |
806567 |
Control Station for Flood Tide |
|
Group 5 – During construction at the West of Tai O to West of HKIA (KP21.3 - 31.5) |
|||
|
IM15 |
804820 |
821110 |
Boundary of Sha Chau and Lung Kwu Chau MP |
|
E5 |
804634 |
822606 |
Control Station for Ebb Tide |
|
F5 |
805185 |
816591 |
Control Station for Flood Tide |
|
Group 6 – During construction at the West of HKIA to Lung Kwu Chau (KP31.5 - 37.5) |
|||
|
IM15 |
804820 |
821110 |
Boundary of Sha Chau and Lung Kwu Chau MP |
|
IM17 |
804865 |
827855 |
Boundary of Sha Chau and Lung Kwu Chau MP |
|
IM16A |
805039 |
824343 |
Coral Colonies at Pak Chau |
|
E6 |
805418 |
832113 |
Control Station for Ebb Tide |
|
F5 |
805185 |
816591 |
Control Station for Flood Tide |
|
Group 7 – During construction at the Lung Kwu Chau to Urmston Anchorage (37.5 - 41.1), Urmston Road (KP41.1 - 42.9) |
|||
|
IM17 |
804865 |
827855 |
Boundary of Sha Chau and Lung Kwu Chau MP |
|
IM18 |
806220 |
827890 |
Boundary of Sha Chau and Lung Kwu Chau MP |
|
IM19 |
807274 |
829250 |
Impact Station for Coastline of Lung Kwu Tan |
|
E6 |
805418 |
832113 |
Control Station for Ebb Tide |
|
F6 |
808812 |
824266 |
Control Station for Flood Tide |
|
E5 |
804634 |
822606 |
Control Station for Flood Tide |
|
Group 8 – During construction at the West of BPPS (KP42.9 - 44.9), Pipeline shore approach at BPPS (KP44.9 - 45.0) |
|||
|
IM19 |
807274 |
829250 |
Impact Station for Coastline of Lung Kwu Tan |
|
IM20A |
809445 |
831728 |
Impact Station for Coastline of Deep Bay |
|
IM21A |
808879 |
830900 |
Coral Colony at Artificial Seawall at BPPS |
|
IM22A |
808703 |
830717 |
Coral Colony at Artificial Seawall at BPPS |
|
E7A |
808313 |
833524 |
Control Station for Ebb Tide |
|
F6 |
808812 |
824266 |
Control Station for Flood Tide |
|
Note: Alternative monitoring stations (E7A, IM11A, IM16A, IM20A, IM21A & IM22A) were proposed by the ET in consultation with the IEC and approved by EPD in accordance with the provision in Section 5.1 and Section 5.2.5 of the Updated EM&A Manual. |
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The Action and Limit Levels for marine water quality monitoring have been established based on the baseline marine water quality monitoring data in accordance with the Updated EM&A Manual. Action and Limit Levels of key assessment parameters for construction phase marine water quality monitoring including DO, turbidity and SS are summarised in Table 2.6.
Table 2.6 Action and Limit Levels for Marine Water Quality Monitoring
|
Parameter |
Action Level |
Limit Level |
|
|
Group 1 – During construction at the pipeline shore approach at LPS (KP17.4 - 18.2), West Lamma Channel (KP14.5 - 17.4) |
|||
|
DO in mg L-1 a |
Surface and Middle 4.2 mg L-1
Bottom 2.4 mg L-1 |
Surface and Middle 2.9 mg L-1
Bottom 1.6 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
14.4 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
19.9 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
20.8 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
29.6 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Group 2 – During construction at the Double Berth Jetty to West Lamma Channel (KP0.0 - 14.5) |
|||
|
DO in mg L-1 a |
Surface and Middle 3.4 mg L-1
Bottom 1.8 mg L-1 |
Surface and Middle 2.4 mg L-1
Bottom 1.4 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
17.1 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
26.8 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
25.7 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
37.1 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Group 3 – During construction at the Jetty Approach (KP0.0 - 5.0), South of Soko Islands (KP5.0 - 8.9), Southwest of Soko Islands (KP8.9 - 12.1) |
|||
|
DO in mg L-1 a |
Surface and Middle 4.1 mg L-1
Bottom 2.7 mg L-1 |
Surface and Middle 3.0 mg L-1
Bottom 2.0 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
17.0 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
30.9 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
22.3 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
36.9 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Group 4 – During construction at the Adamasta Channel (KP12.1 - 15.6), Southwest Lantau (KP15.6 - 21.3) |
|||
|
DO in mg L-1 a |
Surface and Middle 3.4 mg L-1
Bottom 2.8 mg L-1 |
Surface and Middle 2.5 mg L-1
Bottom 2.0 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
63.1 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
165.7 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
75.4 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
121.8 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Group 5 – During construction at the West of Tai O to West of HKIA (KP21.3 - 31.5) |
|||
|
DO in mg L-1 a |
Surface and Middle 4.6 mg L-1
Bottom 4.0 mg L-1 |
Surface and Middle 4.0 mg L-1
Bottom 2.0 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
31.9 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
46.6 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
64.9 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
72.5 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Group 6 – During construction at the West of HKIA to Lung Kwu Chau (KP31.5 - 37.5) |
|||
|
DO in mg L-1 a |
Surface and Middle 4.4 mg L-1
Bottom 3.9 mg L-1 |
Surface and Middle 3.9 mg L-1
Bottom 2.0 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
30.7 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
47.0 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
49.2 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
74.0 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Group 7 – During construction at the Lung Kwu Chau to Urmston Anchorage (37.5 - 41.1), Urmston Road (KP41.1 - 42.9) |
|||
|
DO in mg L-1 a |
Surface and Middle 3.8 mg L-1
Bottom 3.1 mg L-1 |
Surface and Middle 3.4 mg L-1
Bottom 2.0 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
34.5 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
79.2 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
37.8 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
98.2 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Group 8 – During construction at the West of BPPS (KP42.9 - 44.9), Pipeline shore approach at BPPS (KP44.9 - 45.0) |
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|
DO in mg L-1 a |
Surface and Middle 4.3 mg L-1
Bottom 3.6 mg L-1 |
Surface and Middle 3.4 mg L-1
Bottom 2.0 mg L-1 |
|
|
Turbidity in NTU (Depth-averaged b) c |
34.3 NTU, and 120% of the relevant control station's turbidity at the same tide of the same day |
58.5 NTU, and 130% of the relevant control station's turbidity at the same tide of the same day |
|
|
SS in mg L-1 (Depth-averaged b) c |
42.4 mg L-1, and 120% of the relevant control station's SS at the same tide of the same day |
78.2 mg L-1, and 130% of the relevant control station's SS at the same tide of the same day |
|
|
Notes: a. For DO, non-compliance of the water quality limits occurs when monitoring result is lower than the limits. b. “Depth-averaged” is calculated by taking the arithmetic means of reading of all three depths. c. For Turbidity and SS, non-compliance of the water quality limits occurs when monitoring result is higher than the limits. |
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The Event and Action Plan for marine water quality monitoring is provided in Annex I.
The schedule for marine water quality monitoring for the reporting period is provided in Annex L.
A total of seven monitoring events for construction phase marine water quality monitoring were conducted as presented in Table 2.7 for construction of LPS Pipeline within the works area(s) for the associated marine-based activities in the reporting period.
Table 2.7 Details of the Marine Water Quality Monitoring
|
No. |
Date |
Active Works Activities |
Monitoring Locations |
|
1 |
1 February 2021 |
Dredging works at the Double Berth Jetty (KP0.0 – 0.1) for LPS Pipeline conducted on 1, 2 and 4 February 2021 |
Group 2: E2 (mid-ebb tide) F2, F3 (mid-flood tide) |
|
2 |
3 February 2021 |
||
|
3 |
5 February 2021 |
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|
4 |
20 February 2021 |
De-burial (pre-trenching) of pre-installed pipeline at KP 17.3 to 17.4 by Mass Flow Excavator (1) for LPS Pipeline conducted on 23, 26 and 27 February 2021 |
Group 1: E1 (mid-ebb tide) F1 (mid-flood tide) |
|
5 |
22 February 2021 |
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|
6 |
24 February 2021 |
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|
7 |
26 February 2021 |
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|
Remark: (1) Mass flow excavator is a variance of jetting machine. |
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The equipment used in construction phase marine water quality monitoring is presented in Table 2.8. Copies of the calibration certificates for the monitoring equipment are provided in Annex H.
Table 2.8 Marine Water Quality Monitoring Equipment
|
Equipment |
Model |
|
Multi-parameter water quality system (measurement of DO, pH, turbidity, salinity & temperature) |
YSI 6920-V2-M (S/N: 08C100240 / MPP30) |
|
|
|
The monitoring results and graphical presentations are provided in Annex G. There were no breaches of Action and Limit Levels for marine water quality monitoring in the reporting period.
According to Condition 2.10 of FEP-02/558/2018/A and FEP-03/558/2018/A, and Section 5.3.2 of the Updated EM&A Manual, pilot tests on the efficiency of silt curtain system shall be conducted during the early stage of construction to confirm the removal efficiency of the silt curtains. The pilot tests on the efficiency of silt curtain system include i) testing of silt removal efficiency of 75% or higher for silt curtain at grab dredger; ii) testing of silt removal efficiency of 85% or higher for silt curtain at jetting machine; and iii) testing of silt removal efficiency of 80% or higher for double layer silt curtain at sensitive receivers, as determined by the difference between the SS levels near marine works area and that outside silt curtain in the event of the dredging / jetting operations being actively undertaken for BPPS Pipeline and/or LPS Pipeline. The detailed methodology of the pilot tests on the efficiency of silt curtain system is presented in the approved Silt Curtain Deployment Plans for the corresponding FEPs.
Pilot test on the efficiency of cage-type silt curtain at grab dredger was conducted on 2 February 2021 while dredging operation for construction of LPS Pipeline was undertaken on 1, 2 and 4 February 2021 and completed on 4 February 2021. Three rounds of monitoring (i.e. Rounds 1, 2 & 3) for the pilot test covering ebb and flood tides were conducted when dredging operation was operated at or close to the maximum productivity for LPS Pipeline. The dredging work rate ranged from 230 – 255 m3/hr, which is equivalent to 5,520 – 6,120 m3/day for 24 hours work. The monitoring stations for the pilot test are presented in Figure 2.2.
The monitoring results are presented in Annex J. No special phenomena was observed during the three rounds of the pilot test. It should be noted that the sensors for various monitoring parameters, including dissolved oxygen, turbidity, etc., during Rounds 2 and 3 of the pilot test were malfunctioned such that they were indicated as “N/A” in the dataset. The malfunctioning of sensors was possibly due to damage to sensors when the monitoring equipment, including the backup equipment, was impacted with the steel buoyance frame of the cage-type silt curtain while being deployed during the end of Round 1 of the pilot test. Due to unfavourable weather condition on the next day of dredging works on 4 February 2021 (i.e. the last day of dredging work for the LPS Pipeline), the pilot test was not re-arranged. Nevertheless, silt curtain efficiency is determined by the difference between the SS level near marine works area and that outside silt curtain in accordance with the approved Silt Curtain Deployment Plan. Therefore, the SS data obtained in this pilot test were used to determine silt curtain efficiency with the following equation:
where, SS (inside) is the SS level inside the marine works area (i.e. A1); and SS (outside) is determined by averaging the SS levels at monitoring stations outside the silt curtain (i.e. the average of B1 to B4 for cage-type silt curtain).
With reference to the monitoring results, the SS data for Station A1 (within silt curtain) at Round 1 were very low (ranged from 1.7 – 3.4 mg/L) and similar to those outside silt curtain (ranged from 0.5 – 3.2 mg/L). As such, the SS data for Round 1 were considered not representative as there were very low detection of SS for the dredging operation inside silt curtain. Therefore, only data for Rounds 2 and 3 were used to determine the efficiency of silt curtain system (i.e. cage-type silt curtain during dredging operation). The calculated efficiencies of cage-type silt curtain at grab dredger are summarised in Table 2.9, which shows that the efficiencies range from 86.77% to 87.25% with an average of 87.01% which is greater than the EIA assumption of 75% for cage-type silt curtain at grab dredger. The results of the pilot test have demonstrated that the tested silt curtain is capable of achieving an efficiency greater than 75% as assumed in the approved EIA Report for the HKOLNG Terminal project. As such, the proposed cage-type silt curtain is effective for the dredging operation for the Project to minimize water quality impacts and no further measures/recommendations are required.
Table 2.9 Efficiency of Cage-type Silt Curtain for Dredging Operation
|
Round |
Silt Curtain Efficiency (%) |
|
|
Individual |
Overall-average (*) |
|
|
1 |
N/A |
87.01 |
|
2 |
87.25 |
|
|
3 |
86.77 |
|
|
Remark: (*) Only representative SS data for Rounds 2 and 3 of the pilot test were used for determination of silt curtain efficiency. |
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According to Condition 3.7 of FEP-02/558/2018/A, Condition 3.8 of FEP-03/558/2018/A, Section 9.11.3 of the approved EIA Report and Section 7 of the Updated EM&A Manual, marine mammal exclusion zone monitoring with 250 m radius is required during the course of dredging / jetting operations for construction of BPPS Pipeline or LPS Pipeline. Marine mammal exclusion zone requirements for marine dredging or jetting operations for construction of BPPS Pipeline or LPS Pipeline are presented in Table 2.10.
Table 2.10 Marine Mammal Exclusion Zone Requirements
|
Activity |
Exclusion Zone |
Requirement |
|
Marine dredging or jetting operations |
250m |
Before pipeline dredging or jetting commence, the exclusion zone must have been continuously clear of marine mammals for 30 minutes. During pipeline dredging/ jetting, if marine mammals are spotted within the exclusion zone, pipeline dredging/ jetting works will cease and will not resume until the observer confirms that the zone has been continuously clear of marine mammals for a period of 30 minutes. |
Marine mammal exclusion zone monitoring with 250 m radius was conducted on 1, 2 and 4 February 2021 for dredging operation, and 23, 26 and 27 February 2021 for de-burial (pre-trenching) of pre-installed pipeline by Mass Flow Excavator for LPS Pipeline. No sightings of marine mammals were observed during marine mammal exclusion zone monitoring in the reporting period.
The operating speeds and marine travel routes of working vessels for construction of the Project within the reporting period were checked and reviewed. Eight working vessels were used for the construction of LPS Pipeline under FEP-02/558/2018/A during the reporting period. All these working vessels were operated at a speed lower than 10 knots and followed the relevant marine travel requirements stipulated in the FEP. No non-compliance on the operating speeds and marine travel routes of working vessels was identified. Records of operating speeds and marine travel routes of working vessels for construction of the Project provided by the Contractor are presented in Annex N.
A summary of the Environmental Mitigation Implementation Schedule (EMIS) is presented in Annex C. The necessary mitigation measures were implemented properly for the Project.
There were no breaches of Action and Limit Levels for marine water quality monitoring in the reporting period.
Since there were no construction activities conducted in the reporting period requiring impact monitoring of marine mammal in accordance with the Updated EM&A Manual, there were no breaches of Action and Limit Levels for marine mammal monitoring in the reporting period.
Cumulative statistics on exceedance is provided in Annex K.
There were no environmental complaints, notification of summons and successful prosecutions recorded in the reporting period.
Statistics on environmental complaints, notification of summons and successful prosecutions are summarised in Annex K.
Construction activities to be undertaken in the next reporting period of March 2021 are summarised in Table 3.1 below, together with the key issues:
Table 3.1 Major Construction Activities for the Next Reporting Period
|
Activities |
Key Issues |
|
Under FEP-01/558/2018/A |
|
|
Marine-based Works |
|
|
§ Nil |
§ N/A
|
|
Under FEP-02/558/2018/A |
|
|
Land-based Works |
|
|
§ Nil |
§ N/A |
|
Marine-based Works |
|
|
§ De-burial (pre-trenching) of pre-installed pipeline by Mass Flow Excavator (1) § Pipe-laying
|
§ Elevation of suspended solids § Disturbance to marine mammals
|
|
Under FEP-03/558/2018/A |
|
|
Land-based Works |
|
|
§ Excavation for box culvert § Construction of reinforced concrete foundation § Underground drainage works § Drainage installation |
§ Dust emission from construction activities and stockpiles § Waste management § Site surface runoff and wastewater discharge |
|
Marine-based Works |
|
|
§ Nil
|
§ N/A |
Remark: (1) Mass flow excavator is a variance of jetting machine.
The ET will keep track on the construction activities to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.
The tentative schedule for marine water quality monitoring is provided in Annex M.
This Monthly EM&A Report presents the key findings of the EM&A works during the reporting period from 1 to 28 February 2021 for the construction works for the Project in accordance with the Updated EM&A Manual and the requirements of the Further Environmental Permits (FEP-01/558/2018/A, FEP-02/558/2018/A & FEP-03/558/2018/A).
Environmental auditing works, including regular site inspections of construction works conducted by the ET, audit of implementation of Waste Management Plan and review of the acceptability of operating speeds and marine travel routes of working vessels were conducted in the reporting period. No non-compliance of environmental statutory requirements was identified.
Marine water quality monitoring was conducted during the reporting period in accordance with the Updated EM&A Manual. No breaches of Action and Limit Levels were recorded.
Pilot test on the efficiency of silt curtain system (cage-type silt curtain for dredging operation) was conducted during the reporting period in accordance with the approved Silt Curtain Deployment Plan. The results of the pilot test have demonstrated that the tested cage-type silt curtain for dredging operation is capable of achieving an efficiency greater than 75% as assumed in the approved EIA Report for the HKOLNG Terminal project. As such, the proposed cage-type silt curtain is effective for the dredging operation for the Project to minimize water quality impacts and no further measures/recommendations are required.
There were no environmental complaints, notification of summons and successful prosecutions recorded in the reporting period.
The ET will keep
track on the construction works to confirm compliance of environmental
requirements and the proper implementation of all necessary mitigation
measures.
([1]) Application for variation of an environmental permit for FEP-01/558/2018 was undertaken and the latest FEP (FEP-01/558/2018/A) was issued on 6 November 2020.