CONTENTS

Executive Summary. 1

1....... Introduction. 1

1.1        Background. 1

1.2        Scope of the EM&A Report 1

1.3        Organisation Structure. 1

1.4        Summary of Construction Activities. 2

1.5        Summary of EM&A Programme Requirements. 3

1.6        Status of Other Statutory Environmental Requirements. 4

2....... Summary of EM&A Results. 5

2.1        Environmental Site Inspection. 5

2.2        Waste Management Status. 8

2.3        Marine Water Quality Monitoring. 12

2.3.1        Monitoring Requirements. 12

2.3.2        Action and Limit Levels for Marine Water Quality Monitoring. 14

2.3.3        Monitoring Results. 16

2.3.4        Comparison of Monitoring Results with EIA Predictions. 19

2.4        Pilot Test on the Efficiency of Silt Curtain System.. 22

2.4.1        Monitoring Requirements. 22

2.4.2        Monitoring Results. 23

2.5        Marine Mammal Monitoring. 23

2.5.1        Monitoring Requirements. 23

2.5.2        Action and Limit Levels for Marine Mammal Monitoring. 24

2.5.3        Monitoring Results. 24

2.5.4        Comparison of Monitoring Results with EIA Predictions. 25

2.6        Marine Mammal Exclusion Zone Monitoring. 25

2.6.1        Monitoring Requirements. 25

2.6.2        Monitoring Results. 26

2.7        Records of Operating Speeds and Marine Travel Routes of Working Vessels. 26

2.8        Implementation Status of Environmental Mitigation Measures. 27

2.9        Summary of Exceedances of the Environmental Quality Performance Limit 27

2.10      Summary of Environmental Complaints, Notification of Summons and Successful Prosecutions. 27

3....... Conclusion and recommendations. 28

 

Annexes

Annex A         Project Organisation

Annex B         Construction Programme

Annex C        Environmental Mitigation Implementation Schedule (EMIS)

Annex D        Status of Statutory Environmental Requirements

Annex E         Cumulative Statistics on Exceedances, Environmental Complaints, Notification of Summons and Successful Prosecutions

Annex F         Graphical Presentations of Construction Phase Marine Water Quality Monitoring Results

 

List of Tables

Table 1.1       Contact Information of Key Personnel 2

Table 1.2       Major Construction Activities Undertaken in the Reporting Period. 2

Table 1.3       Summary of Status for the EM&A Programme under the Updated EM&A Manual 3

Table 2.1       Summary of Aspects for Key Observations Recorded during Site Inspections. 5

Table 2.2       Quantities of Waste Generated for FEP-01/558/2018/A. 8

Table 2.3       Quantities of Waste and Marine Sediment Generated for FEP-02/558/2018/A. 9

Table 2.4       Quantities of Waste and Marine Sediment Generated for FEP-03/558/2018/B. 11

Table 2.5       Location of Marine Water Quality Monitoring Stations. 13

Table 2.6       Action and Limit Levels for Marine Water Quality Monitoring  14

Table 2.7       Percentage Compliance of Marine Water Quality Monitoring Data within Action and Limit Levels. 16

Table 2.8       Impact Stations for Marine Water Quality Monitoring and the Corresponding Sensitive Receivers and Model Observation Points. 19

Table 2.9       Efficiencies of Cage-type Silt Curtains for Dredging and Jetting Operations. 23

Table 2.10      Action and Limit Levels for Marine Mammal Monitoring. 24

Table 2.11      Running Quarterly STG and ANI for Finless Porpoise. 24

Table 2.12      Marine Mammal Exclusion Zone Requirements. 25

Table 2.13      Monitoring Results for Marine Mammal Exclusion Zone Monitoring  26

 

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 for LPS Pipeline

Figure 2.3      Monitoring Locations for Silt Curtain Pilot Test for Dredging Operation for BPPS Pipeline

Figure 2.4      Monitoring Locations for Silt Curtain Pilot Test for Jetting Operation for BPPS and LPS Pipelines

Figure 2.5      Vessel-based Marine Mammal Survey Location

Figure 2.6      Underwater PAM Survey Location

Figure 2.7      Distribution of Finless Porpoise Sightings in December 2020 and July to September 2021


Executive Summary

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/B) – 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 Annual EM&A Review Report presenting the EM&A works carried out during the period from 23 September 2020 to 30 September 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-01/558/2018/A

Marine Mammal Monitoring (vessel-based line transect survey)

24

Passive Acoustic Monitoring (C-POD deployment)

On-going

Marine Mammal Exclusion Zone Monitoring

During percussive piling works for construction of the Jetty

Environmental Site Inspection

5

For FEP-02/558/2018/A

Marine Water Quality Monitoring

34

Marine Mammal Exclusion Zone Monitoring

During dredging / jetting operation 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

10

For FEP-03/558/2018/B

Marine Water Quality Monitoring

32

Marine Mammal Exclusion Zone Monitoring

During dredging / jetting operation for construction of BPPS Pipeline

Pilot Test on the Efficiency of Silt Curtain System – Cage-type Silt Curtain for Dredging Operation

1

Environmental Site Inspection

39

For FEP-02/558/2018/A and FEP-03/558/2018/B

Pilot Test on the Efficiency of Silt Curtain System – Cage-type Silt Curtain for Jetting Operation

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, including checking of compliance with the approval conditions given by the Director of Environmental Protection for the entry of working vessels within marine parks and the proposed South Lantau Marine Park (SLMP), in pursuant to Condition 3.1 of FEP-01/558/2018/A, Condition 3.4 of FEP-02/558/2018/A and Condition 3.4 of FEP-03/558/2018/B, were conducted in the reporting period, as appropriate.   No non-compliance of environmental statutory requirements was identified.

Breaches of Action and Limit Levels

There were no Project-related Action and Limit Level exceedances for marine water quality monitoring in the reporting period.

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.

Comments, Recommendations and Conclusions for the Reporting Period

The recommended environmental mitigation measures for the Project were effectively implemented and the EM&A programme undertaken by the ET has effectively monitored the construction activities as well as ensured proper implementation of mitigation measures in the reporting period.  The monitoring and audit activities conducted in the reporting period have been reviewed and are considered effective.  As such, no change to the monitoring methodology is recommended.  Based on the EM&A findings for the reporting period, the environmental performance for the construction of the Project is generally in line with the EIA predictions and considered acceptable.

 


1.                 Introduction

1.1             Background

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 (FEPs) 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/B) ([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.

1.2             Scope of the EM&A Report

This is the Annual EM&A Review Report for the Project which summarises the key findings of the EM&A programme during the reporting period from 23 September 2020 to 30 September 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/B). 

1.3             Organisation Structure

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/B)

 

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 3281

Independent Environmental Checker (IEC)

(Mott MacDonald Hong Kong Limited)

 

IEC

Arthur Lo (Note 1)

 

2828 5757

Lydia Chak (Note 2)

2585 8473

Contractor

(CNOOC Offshore Oil Engineering Co. Ltd.)

Environmental Manager

H Y Tang

6111 5789

 

Environmental Officer

Kelvin Cheung

9060 1020

Notes:

(1) The duties of IEC were discharged up to 11 June 2021; and (2) The duties of IEC had been discharged since 12 June 2021.

1.4             Summary of Construction Activities

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

§   Jacket installation

§   Pile installation

FEP-02/558/2018/A

§   Preparation of intermediate hydrotesting for pipeline

§   Pre-trenching

§   Dredging works

§   De-burial (pre-trenching) of pre-installed pipeline by Mass Flow Excavator (1)

§   Pipe-laying works

§   Intermediate hydrotesting for pipeline

§   Post-trenching

FEP-03/558/2018/B

§   Preparation works at the new GRS (including set-up of site offices, erection of hoarding and mobilisation of wastewater treatment facilities)

§   Plate Load Test – Pipe Rack

§   Cable pulling

§   Construction of reinforced concrete foundation

§   Underground drainage works

§   Drainage installation

§   Seawall construction

§   Backfill and permanent paving works

§   Excavation, drainage and backfilling works

§   Pipe rack – erection and assembly

§   Building superstructure works

§   Pipe-laying works

§   Pre-trenching

§   Sheet pile installation

§   Post-trenching

Remark: (1) Mass flow excavator is a variance of jetting machine.

1.5             Summary of EM&A Programme Requirements

The status of EM&A Programme for all environmental aspects required under the Updated EM&A Manual are presented in Table 1.3.  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/B

§   Completed

Efficiency of Silt Curtain System

FEP-02/558/2018/A

FEP-03/558/2018/B

§   Completed for cage-type silt curtain for dredging operation (under FEP-02/558/2018/A and FEP-03/558/2018/B)

§   Completed for cage-type silt curtain for jetting operation (under FEP-02/558/2018/A and FEP-03/558/2018/B)

§   To be implemented upon early stage of construction works for jetting operation for floating silt curtain (under FEP-02/558/2018/A and FEP-03/558/2018/B)

Construction Phase Monitoring

FEP-02/558/2018/A

FEP-03/558/2018/B

§   On-going for dredging / jetting operations for FEP-02/558/2018/A and FEP-03/558/2018/B

Post-Construction Monitoring

FEP-02/558/2018/A

FEP-03/558/2018/B

§   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/B

§   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/B

§   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

§   On-going (for percussive piling works for construction of the Jetty between July and December)

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/B

§   On-going for FEP-01/558/2018/A (marine mammal exclusion zone with 500m radius)

§   On-going for marine dredging / jetting operations for FEP-02/558/2018/A and FEP-03/558/2018/B (marine mammal exclusion zone with 250m radius)

Environmental Site Inspection

Regular Site Inspection

FEP-01/558/2018/A

FEP-02/558/2018/A

FEP-03/558/2018/B

§   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/B

§   On-going

Environmental Log Book

FEP-01/558/2018/A

FEP-02/558/2018/A

FEP-03/558/2018/B

§   On-going

 

 

1.6             Status of Other Statutory Environmental Requirements

The environmental licenses and permits, including further environmental permits, registration as chemical waste producer, construction noise permits, wastewater discharge license, marine dumping permits, etc., which were valid in the reporting period.  No non-compliance with environmental statutory requirements was identified.  The status of statutory environmental requirements is presented in Annex D.

The environmental mitigation implementation schedule (EMIS) is presented in Annex C.


 

2.                 Summary of EM&A Results

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 audit on waste management practice, marine water quality monitoring, including pilot tests on the efficiency of silt curtain system, marine mammal monitoring (i.e. vessel-based line transect survey and passive acoustic monitoring) and marine mammal exclusion zone monitoring were conducted during the reporting period, and the findings are summarised below.

2.1             Environmental Site Inspection

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, 54 environmental site inspections were carried out, of which 5 sessions were for FEP-01/558/2018/A, 10 sessions were for FEP-02/558/2018/A and 39 sessions were for FEP-03/558/2018/B.  The Independent Environmental Checker (IEC) attended 25 environmental site inspections as the IEC audits during the reporting period.  Aspects for the key observations recorded during site inspections are summarised in Table 2.1.  Details of observations recorded can be referred to the associated Monthly EM&A Reports for the reporting period.  The environmental mitigation implementation schedule (EMIS) is presented in Annex C.

Table 2.1      Summary of Aspects for Key Observations Recorded during Site Inspections

Aspect

Number of Observations

Cumulative Number of Observations

FEP-01/558/2018/A (1) (2)

Oct-Dec 2020

Air quality

0

0

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Jan-Mar 2021

Air quality

0

0

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Apr-Jun 2021

Air quality

0

0

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Jul-Sep 2021

Air quality

0

0

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Total

0

FEP-02/558/2018/A (3) (4)

Oct-Dec 2020

Air quality

0

0

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Jan-Mar 2021

Air quality

0

0

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Apr-Jun 2021

Air quality

0

0

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Jul-Sep 2021

Air quality

1

1

Water quality

0

0

Waste management

0

0

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Total

1

FEP-03/558/2018/B (5)

Oct-Dec 2020

Air quality

0

0

Water quality

0

0

Waste Management

1

1

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

0

Jan-Mar 2021

Air quality

2

2

Water quality

0

0

Waste Management

1

2

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

1

1

Apr-Jun 2021

Air quality

4

6

Water quality

2

2

Waste Management

4

6

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

0

1

Jul-Sep 2021

Air quality

3

9

Water quality

1

3

Waste Management

2

8

Ecology

0

0

Visual

0

0

Hazard to life

0

0

Others

1

2

Total

22

Notes:

(1)   Commencement date of construction for FEP-01/558/2018/A was 27 November 2020.

(2)   The piling installation vessel for construction of the jetty was under quarantine from 19 November 2020 to 2 December 2020 in Hong Kong waters.  Therefore, no marine-based works for FEP-01/558/2018/A was undertaken in November 2020.  Marine-based works for FEP-01/558/2018/A commenced in December 2020.

(3)   Commencement date of construction for FEP-02/558/2018/A was 13 December 2020.

(4)   The preparation works for marine-based works for FEP-02/558/2018/A (e.g. approval of marine dumping permit) were undertaken in December 2020.  Therefore, no marine-based works for FEP-02/558/2018/A were undertaken in December 2020.  Marine-based works for FEP-02/558/2018/A are expected to commence in January 2021.

(5)   Commencement date of construction for FEP-03/558/2018/B was 23 September 2020.

2.2             Waste Management Status

Waste management audits were performed with reference to the Waste Management Checklists for the corresponding Waste Management Plans detailed in Annex E of the associated Monthly EM&A Reports 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 and marine sediment generated 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 was generated under the three FEPs.  Inert C&D materials (public fill) and marine sediment were generated under FEP-03/558/2018/B of which the excavated marine sediment was either disposed of in the dedicated disposal grounds properly or delivered to other project as re-use while all the excavated marine sediment under FEP-02/558/2018/A was disposed of in the dedicated disposal grounds properly.  Detailed waste flow tables can be referred to Annex F of the associated Monthly EM&A Reports for the reporting period.

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

Oct 2020

N/A

N/A

N/A

N/A

N/A

N/A

Nov 2020 (1)

0

0

0

0

0

0

Dec 2020

0

0

0

0

0

0

Jan 2021

0

0

0

0

0

0

Feb 2021

0

0

0

0

0

0

Mar 2021

0

0

0

0

0

0

Apr 2021

0

0

0

0

0

0

May 2021

0

0

0

0

0

0

Jun 2021

0

0

0

0

0

0

Jul 2021

0

0

0

0

0

0

Aug 2021

0

0

0

0

0

0

Sep 2021

0

0

0

0

0

0

Total

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)

 

Oct 2020

N/A

N/A

N/A

N/A

N/A

N/A

 

Nov 2020 (1)

0

0

0

0

0

0

 

Dec 2020

0

0

0

0

0

6.910

 

Jan 2021

0

0

0

0

0

0

 

Feb 2021

0

0

0

0

0

0

 

Mar 2021

0

0

0

0

0

0

 

Apr 2021

0

0

0

0

0

0

 

May 2021

0

0

0

0

0

0

 

Jun 2021

0

0

0

0

0

0

 

Jul 2021

0

0

0

0

0

5.140

 

Aug 2021

0

0

0

0

0

8.000

 

Sep 2021

0

0

0

0

0

19.030

 

Total

0

0

0

0

0

39.080

 

Note:

(1)   Commencement date of construction for FEP-01/558/2018/A was 27 November 2020.

 

Table 2.3      Quantities of Waste and Marine Sediment Generated 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

Oct 2020

N/A

N/A

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

N/A

N/A

Dec 2020 (1)

0

0

0

0

0

0

Jan 2021

0

0

0

0

0

0

Feb 2021

0

0

0

0

0

0

Mar 2021

0

0

0

0

0

0

Apr 2021

0

0

0

0

0

0

May 2021

0

0

0

0

0

0

Jun 2021

0

0

0

0

0

0

Jul 2021

0

0

0

0

0

0

Aug 2021

0

0

0

0

0

0

Sep 2021

0

0

0

0

0

0

Total

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)

 

Oct 2020

N/A

N/A

N/A

N/A

N/A

N/A

 

Nov 2020

N/A

N/A

N/A

N/A

N/A

N/A

 

Dec 2020 (1)

0

0

0

0

0

0

 

Jan 2021

0

0

0

0

0

26.930

 

Feb 2021

0

0

0

0

0

21.500

 

Mar 2021

0

0

0

0

0

26.230

 

Apr 2021

0

0

0

0

0

0

 

May 2021

0

0

0

0

0

0

 

Jun 2021

0

0

0

0

0

0

 

Jul 2021

0

0

0

0

0

0

 

Aug 2021

0

0

0

0

0

5.460

 

Sep 2021

0

0

0

0

0

4.920

 

Total

0

0

0

0

0

85.04

 

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

Open Sea Disposal

Oct 2020

N/A

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

N/A

Dec 2020 (1)

0

0

0

0

0

Jan 2021

0

0

0

0

0

Feb 2021

4.388

0

0

0

4.388

Mar 2021

0

0

0

0

0

Apr 2021

0

0

0

0

0

May 2021

0

0

0

0

0

Jun 2021

0

0

0

0

0

Jul 2021

0

0

0

0

0

Aug 2021

0

0

0

0

0

Sep 2021

0

0

0

0

0

Total

4.388

0

0

0

4.388

Note:

(1)   Commencement date of construction for FEP-02/558/2018/A was 13 December 2020.

Table 2.4      Quantities of Waste and Marine Sediment Generated for FEP-03/558/2018/B

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

Sep 2020 (1)

0

0

0

0

0

0

Oct 2020

0

0

0

0

0

0

Nov 2020

0

0

0

0

0

0

Dec 2020

0

0

0

0

0

0

Jan 2021

244.400

0

0

0

244.400

0

Feb 2021

360.640

0

0

0

360.640

0

Mar 2021

1,274.410

0

0

0

1,274.410

0

Apr 2021

622.900

0

0

0

622.900

0

May 2021

3,077.620

0

0

0

3,077.620

0

Jun 2021

785.540

0

0

0

785.540

0

Jul 2021

1,211.060

0

0

0

1,211.060

0

Aug 2021

2,269.600

0

0

0

2,269.600

0

Sep 2021

767.130

0

0

0

767.130

0

Total

10,613.300

0

0

0

10,613.300

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)

 

Sep 2020 (1)

0

0

0

0

0

0

 

Oct 2020

0

0

0

0

0

0

 

Nov 2020

0

0

0

0

0

0

 

Dec 2020

0

0

0

0

0

0

 

Jan 2021

0

0

0

0

0

0

 

Feb 2021

0

0

0

0

0

0

 

Mar 2021

0

0

0

0

0

0

 

Apr 2021

0

0

0

0

0

41.230

 

May 2021

0

0

0

0

0

52.280

 

Jun 2021

0

0

0

0

0

28.500

 

Jul 2021

0

0

0

0

0

24.720

 

Aug 2021

0

0

0

0

0

40.550

 

Sep 2021

0

0

0

0

0

53.990

 

Total

0

0

0

0

0

241.270

 

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

Open Sea Disposal

 

Sep 2020 (1)

0

0

0

0

0

 

Oct 2020

0

0

0

0

0

 

Nov 2020

0

0

0

0

0

 

Dec 2020

0

0

0

0

0

 

Jan 2021

0

0

0

0

0

 

Feb 2021

0

0

0

0

0

 

Mar 2021

0

0

0

0

0

 

Apr 2021

3.438

0

0

0

3.438

 

May 2021

79.672

23.169

0

1.602

101.239

 

Jun 2021

3.650

35.771

0

0

39.421

 

Jul 2021

0

0

0

0

0

 

Aug 2021

0

0.556

0

0

0.556

 

Sep 2021

0.282

0.114

0

0

0.396

 

Total

87.042

59.610

0

1.602

145.050

 

Note:

(1)   Commencement date of construction for FEP-03/558/2018/B was 23 September 2020.

 

2.3             Marine Water Quality Monitoring

2.3.1       Monitoring Requirements

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.

2.3.2       Action and Limit Levels for Marine Water Quality Monitoring

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)

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.

The Event and Action Plan for marine water quality monitoring can be referred to the Updated EM&A Manual.

2.3.3       Monitoring Results

A total of 66 monitoring events for construction phase marine water quality monitoring were conducted for construction of BPPS Pipeline and LPS Pipeline within the works area(s) for the associated marine-based activities in the reporting period.  The percentage compliance of marine water quality monitoring results within the corresponding Action and Limit Levels is presented in Table 2.7.  There were no Project-related Action and Limit Level exceedances for marine water quality monitoring in the reporting period.  Graphical presentations are provided in Annex F.

Table 2.7      Percentage Compliance of Marine Water Quality Monitoring Data within Action and Limit Levels

Month/Year

DO
(Surface and Middle)

DO
(Bottom)

Turbidity

SS

Group 1 – During construction at the pipeline shore approach at LPS (KP17.4 - 18.2), West Lamma Channel (KP14.5 - 17.4)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

N/A

N/A

N/A

N/A

Feb 2021

100%

100%

100%

100%

Mar 2021

100%

100%

100%

100%

Apr 2021

N/A

N/A

N/A

N/A

May 2021

N/A

N/A

N/A

N/A

Jun 2021

N/A

N/A

N/A

N/A

Jul 2021

100%

83.3%

100%

100%

Aug 2021

N/A

N/A

N/A

N/A

Sep 2021

N/A

N/A

N/A

N/A

Total

100%

94.4%

100%

100%

Group 2 – During construction at the Double Berth Jetty to West Lamma Channel (KP0.0 - 14.5)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

100%

100%

100%

100%

Feb 2021

100%

100%

100%

100%

Mar 2021

N/A

N/A

N/A

N/A

Apr 2021

N/A

N/A

N/A

N/A

May 2021

N/A

N/A

N/A

N/A

Jun 2021

N/A

N/A

N/A

N/A

Jul 2021

N/A

N/A

N/A

N/A

Aug 2021

100%

89.3%

100%

100%

Sep 2021

100%

87.5%

100%

100%

Total

100%

94.2%

100%

100%

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)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

N/A

N/A

N/A

N/A

Feb 2021

N/A

N/A

N/A

N/A

Mar 2021

N/A

N/A

N/A

N/A

Apr 2021

100%

100%

100%

100%

May 2021

100%

100%

100%

97.9%

Jun 2021

N/A

N/A

N/A

N/A

Jul 2021

N/A

N/A

N/A

N/A

Aug 2021

N/A

N/A

N/A

N/A

Sep 2021

N/A

N/A

N/A

N/A

Total

100%

100%

100%

99.0%

Group 4 – During construction at the Adamasta Channel (KP12.1 - 15.6), Southwest Lantau (KP15.6 - 21.3)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

N/A

N/A

N/A

N/A

Feb 2021

N/A

N/A

N/A

N/A

Mar 2021

N/A

N/A

N/A

N/A

Apr 2021

N/A

N/A

N/A

N/A

May 2021

N/A

N/A

N/A

N/A

Jun 2021

N/A

N/A

N/A

N/A

Jul 2021

N/A

N/A

N/A

N/A

Aug 2021

N/A

N/A

N/A

N/A

Sep 2021

N/A

N/A

N/A

N/A

Total

N/A

N/A

N/A

N/A

Group 5 – During construction at the West of Tai O to West of HKIA (KP21.3 - 31.5)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

N/A

N/A

N/A

N/A

Feb 2021

N/A

N/A

N/A

N/A

Mar 2021

N/A

N/A

N/A

N/A

Apr 2021

N/A

N/A

N/A

N/A

May 2021

N/A

N/A

N/A

N/A

Jun 2021

N/A

N/A

N/A

N/A

Jul 2021

N/A

N/A

N/A

N/A

Aug 2021

N/A

N/A

N/A

N/A

Sep 2021

100%

100%

100%

100%

Total

100%

100%

100%

100%

Group 6 – During construction at the West of HKIA to Lung Kwu Chau (KP31.5 - 37.5)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

N/A

N/A

N/A

N/A

Feb 2021

N/A

N/A

N/A

N/A

Mar 2021

N/A

N/A

N/A

N/A

Apr 2021

N/A

N/A

N/A

N/A

May 2021

N/A

N/A

N/A

N/A

Jun 2021

N/A

N/A

N/A

N/A

Jul 2021

N/A

N/A

N/A

N/A

Aug 2021

N/A

N/A

N/A

N/A

Sep 2021

N/A

N/A

N/A

N/A

Total

N/A

N/A

N/A

N/A

Group 7 – During construction at the Lung Kwu Chau to Urmston Anchorage (37.5 - 41.1), Urmston Road (KP41.1 - 42.9)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

N/A

N/A

N/A

N/A

Feb 2021

N/A

N/A

N/A

N/A

Mar 2021

N/A

N/A

N/A

N/A

Apr 2021

100%

100%

83.3%

83.3%

May 2021

100%

100%

93.9%

95.5%

Jun 2021

100%

100%

90.0%

93.3%

Jul 2021

N/A

N/A

N/A

N/A

Aug 2021

N/A

N/A

N/A

N/A

Sep 2021

N/A

N/A

N/A

N/A

Total

100%

100%

89.1%

90.7%

Group 8 – During construction at the West of BPPS (KP42.9 - 44.9), Pipeline shore approach at BPPS (KP44.9 - 45.0)

Oct 2020

N/A

N/A

N/A

N/A

Nov 2020

N/A

N/A

N/A

N/A

Dec 2020

N/A

N/A

N/A

N/A

Jan 2021

N/A

N/A

N/A

N/A

Feb 2021

N/A

N/A

N/A

N/A

Mar 2021

N/A

N/A

N/A

N/A

Apr 2021

N/A

N/A

N/A

N/A

May 2021

N/A

N/A

N/A

N/A

Jun 2021

N/A

N/A

N/A

N/A

Jul 2021

N/A

N/A

N/A

N/A

Aug 2021

100%

95.8%

100%

100%

Sep 2021

100%

100%

93.8%

93.8%

Total

100%

97.9%

96.9%

96.9%

Notes:

(1)  The figures in percentage are calculated with reference to the number of depth-averaged data with the corresponding Action and Limit Levels divided by the total number of depth-averaged data for each monitoring parameter.

(2)  N/A denotes that no marine water quality monitoring (WQM) was required to be conducted in the month.

Amongst the eight groupings for marine water quality monitoring (WQM) (i.e. Groups 1 to 8), no marine WQM was required to be conducted for Group 4 and Group 6 as no marine dredging / jetting operations were undertaken within the respective works areas for construction of BPPS Pipeline in the reporting period while marine WQM data of the four monitoring parameters (i.e. DO (Surface and Middle), DO (Bottom), turbidity and SS) for Group 5 recorded in the reporting period were within the corresponding Action and Limit Levels.

In general, the levels of DO, turbidity and SS complied with the Action and Limit Levels during most of the time (~ >90%).  Investigations on all the Action and/or Limit Levels exceedances were carried out in accordance with the Event and Action Plan for marine WQM, and all the exceedances were considered non-Project related based on the investigation results which have been presented in the corresponding Monthly EM&A Reports for the reporting period.

Notwithstanding, the Contractor was reminded to ensure the mitigation measures for water quality impacts as set out in the Updated EM&A Manual are fully and properly implemented.

2.3.4       Comparison of Monitoring Results with EIA Predictions

SS and DO levels in terms of SS elevation and DO depletion, respectively, at each sensitive receiver as a result of marine-based construction activities were assessed and predicted in the approved EIA Report.  With reference to Figures 7.2 and 7.3 of the approved EIA Report, 22 impact stations and the corresponding sensitive receivers and/or model observation points are presented in Table 2.8.

Table 2.8      Impact Stations for Marine Water Quality Monitoring and the Corresponding Sensitive Receivers and Model Observation Points

Impact Station

Fisheries Sensitive Receiver

Ecological Sensitive Receiver

Water Quality Sensitive Receiver

Model Observation Point

Group 1 – During construction at the pipeline shore approach at LPS (KP17.4 - 18.2), West Lamma Channel (KP14.5 - 17.4)

IM1

§ Fisheries Spawning/ Nursery Grounds in South Lantau (B8, B9, MPE)

§ Potential South Lamma MP (MPE)

§ Corals at Hung Shing Yeh and Ha Mei Wan (CR20, CR21)

§ Gazetted Beaches at Hung Shing Yeh Beach and Lo So Shing Beach (B8, B9)

§ Seawater Intake at Lamma Power Station (C13)

§ N/A

IM2

§ N/A

§ Corals at Shek Kok Tsui and Pak Kok (CR12, CR13)

§ N/A

§ N/A

Group 2 – During construction at the Double Berth Jetty to West Lamma Channel (KP0.0 - 14.5)

IM3

§ Fisheries Spawning/ Nursery Grounds in South Lantau (NB9)

§ N/A

§ Non-gazetted Beaches at Po Yue Wan (NB9)

§ N/A

IM4

§ Fisheries Spawning/ Nursery Grounds in South Lantau (CR4)

§ Corals at Shek Kwu Chau (CR4)

§ N/A

§ N/A

IM5

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPD-6)

IM6

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPD-5)

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

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPD-5)

IM7

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPD-4)

IM8

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPD-3)

IM9

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPD-2)

Group 4 – During construction at the Adamasta Channel (KP12.1 - 15.6), Southwest Lantau (KP15.6 - 21.3)

IM10

§ N/A

§ Intertidal Mudflats/ Mangroves/ Horseshoe Crab Nursery Grounds at Fan Lau Tung Wan (MPC-5)

§ Non-gazetted Beaches at Fan Lau Tung Wan (NB4)

§ Boundary of existing and proposed MPs (MPC-5)

IM11A

§ N/A

§ N/A

§ Non-gazetted Beaches at Fan Lau Sai Wan (NB3)

§ Boundary of existing and proposed MPs (MPC-4)

IM12

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPC-3)

IM13

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPC-2)

IM14

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPC-1)

Group 5 – During construction at the West of Tai O to West of HKIA (KP21.3 - 31.5)

IM15

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPA-3)

Group 6 – During construction at the West of HKIA to Lung Kwu Chau (KP31.5 - 37.5)

IM15

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPA-3)

IM16A

§ Fisheries Spawning Ground in North Lantau (CR3)

§ Artificial Reef Deployment Area at Sha Chau and Lung Kwu Chau (AR1)

§ Sha Chau and Lung Kwu Chau MP (MPA-5)

§ Corals at Pak Chau (CR3)

§ N/A

§ N/A

IM17

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPA-2)

Group 7 – During construction at the Lung Kwu Chau to Urmston Anchorage (37.5 - 41.1), Urmston Road (KP41.1 - 42.9)

IM17

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPA-2)

IM18

§ N/A

§ N/A

§ N/A

§ Boundary of existing and proposed MPs (MPA-1)

IM19

§ N/A

§ Intertidal Mudflats/ Mangroves/ Horseshoe Crab Nursery Grounds at Lung Kwu Sheung Tan (NB1)

§ Non-gazetted Beaches at Lung Kwu Sheung Tan (NB1)

§ N/A

Group 8 – During construction at the West of BPPS (KP42.9 - 44.9), Pipeline shore approach at BPPS (KP44.9 - 45.0)

IM19

§ N/A

§ Intertidal Mudflats/ Mangroves/ Horseshoe Crab Nursery Grounds at Lung Kwu Sheung Tan (NB1)

§ Non-gazetted Beaches at Lung Kwu Sheung Tan (NB1)

§ N/A

IM20A

§ N/A

§ Intertidal Mudflats/ Mangroves/ Horseshoe Crab Nursery Grounds at Ha Pak Nai (H1)

§ Seagrass Beds at Ha Pak Nai (H1)

§ Seawater Intake at Sludge Treatment Facilities (C1)

§ N/A

IM21A

§ N/A

§ Corals at Artificial Seawall at BPPS (CR1)

§ N/A

§ N/A

IM22A

§ N/A

§ Corals at Artificial Seawall at BPPS (CR2)

§ N/A

§ N/A

 

 

 

 

 

2.3.4.1  Suspended Solids Elevation

For the marine WQM stations under Group 1 and Group 2 (i.e. IM1 and IM2 for Group 1; and IM3, IM4, IM5 and IM6 for Group 2), all SS levels at these marine WQM stations in the reporting period were within the corresponding Action/Limit Levels resulting in being in line with the EIA predictions (i.e. compliance with Water Quality Objective (WQO) for SS in terms of percentage in both dry and wet seasons under Dredging Scenario C01A and Jetting Scenario C06 as reported in Table 7C.1 and Table 7C.8 of Annex 7C in the approved EIA Report, respectively).

For the marine WQM stations under Group 3 (i.e. IM6, IM7, IM8, IM9), all SS levels at these marine WQM stations in the reporting period were within the corresponding Action/Limit Levels except that at IM9 on 24 May 2021 with an Action Level exceedance recorded, resulting in 99.0% being within the corresponding Action/Limit Levels within the reporting period.  Given the Action Level exceedance in SS recorded at IM9 on 24 May 2021 was considered non-Project related upon investigation, all SS levels were considered being generally in line with the EIA predictions (i.e. compliance with WQO for SS in terms of percentage in both dry and wet seasons under Dredging Scenario C01A as reported in Table 7C.1 of Annex 7C in the approved EIA Report).

For the marine WQM station under Group 5 (i.e. IM15), all SS levels at this marine WQM station in the reporting period were within the corresponding Action/Limit Levels resulting in being in line with the EIA predictions (i.e. compliance with WQO for SS in terms of percentage in both dry and wet seasons under Jetting Scenario C04 as reported in Table 7C.6 of Annex 7C in the approved EIA Report).

For the marine WQM stations under Group 7 (i.e. IM17, IM18 and IM19), most of the SS levels at these stations in the reporting period were within the corresponding Action/Limit Levels except those at IM17 and IM18 on 28 April 2021; at IM18 and IM19 on 10 May 2021; at IM18 on 26 May 2021; at IM18 on 7 June 2021; and at IM19 on 9 June 2021 with Action/Limit Level exceedances recorded, resulting in 90.7% being within the corresponding Action/Limit Levels within the reporting period.  Given the Action/Limit Level exceedances in SS recorded at the marine WQM stations on these dates were considered non-Project related upon investigation, all SS levels were considered being generally in line with the EIA predictions (i.e. compliance with WQO for SS in terms of percentage in both dry and wet seasons under Dredging Scenario C01C as reported in Table 7C.3 of Annex 7C in the approved EIA Report).

For the marine WQM stations under Group 8 (i.e. IM19, IM20A, IM21A and IM22A), most of the SS levels at these stations in the reporting period were within the corresponding Action/Limit Levels except the one at IM19 on 6 September 2021 with Action Level exceedance recorded, resulting in 96.9% being within the corresponding Action/Limit Levels within the reporting period.  Given the Action Level exceedances in SS recorded at IM19 on these dates were considered non-Project related upon investigation, all SS levels were considered being generally in line with the EIA predictions (i.e. compliance with WQO for SS in terms of percentage in both dry and wet seasons under Dredging Scenario C01A as reported in Table 7C.1 of Annex 7C in the approved EIA Report).

In addition, the SS levels at the corresponding marine WQM stations (e.g. IM6, IM15, IM16A, IM21A, IM22A, etc.) in the reporting period were all in line with the EIA predictions under mitigated scenarios (i.e. implementation of the recommended mitigation measures for water quality impacts for associated with marine-based construction activities such as deployment of silt curtains during the course of dredging/ jetting operations) with reference to Tables 7C.10, 7C.12, 7C.15 and 7C.17 of Annex 7C in the approved EIA Report.

2.3.4.2  Dissolved Oxygen Depletion

According to Annex 7D of the approved EIA Report, the predicted maximum DO depletion values for all sensitive receivers associated with marine-based construction activities are well below their corresponding allowable DO depletion values, of which the maximum DO depletion of 0.2 mg/L amongst all sensitive receivers was predicted and no unacceptable depletion of DO from the marine-based construction activities was also anticipated as documented in the approved EIA Report (see Section 7.7.1).

Despite the Action/Limit Level exceedances in DO were recorded throughout the reporting period, all were considered non-Project related upon investigation, implying that the DO levels at the relevant sensitive receivers were considered being generally in line with the EIA predictions as reported in Table 7D.1 of Annex 7D in the approved EIA Report.

2.3.4.3  Review of Monitoring Methodology for Marine Water Quality

The monitoring methodology for marine water quality was reviewed, including the routine operations of marine water quality monitoring associated with construction phase marine water quality monitoring data within the reporting period, the monitoring was able to detect change in water quality with reference to the EIA predictions based on the monitoring data in terms of DO and SS levels.  Therefore, the monitoring methodology for marine water quality is considered effective and no change to monitoring methodology is recommended.

2.4             Pilot Test on the Efficiency of Silt Curtain System

2.4.1       Monitoring Requirements

According to Condition 2.10 of FEP-02/558/2018/A and FEP-03/558/2018/B, 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.

2.4.2       Monitoring Results

Pilot tests on the efficiencies of cage-type silt curtain at grab dredgers for LPS Pipeline and BPPS Pipeline were conducted on 2 February and 7 June 2021, respectively, while pilot test on the efficiency of cage-type silt curtain at jetting machine for both LPS and BPPS Pipelines was conducted on 26 August 2021.  The monitoring stations for the pilot tests are presented in Figures 2.2, 2.3 and 2.4.

The monitoring results of the pilot tests are summarised in Table 2.9, which shows that the silt removal efficiencies of cage-type silt curtains were greater than the EIA assumptions (75% and 85% for cage-type silt curtain at grab dredger and jetting machine, respectively) demonstrating that the tested silt curtains are capable of achieving efficiencies greater than the required as assumed in the approved EIA Report for the Project.  As such, the proposed cage-type silt curtains are effective for the dredging and jetting operations for the Project to minimize water quality impacts and no further measures/recommendations are required.

Table 2.9     Efficiencies of Cage-type Silt Curtains for Dredging and Jetting Operations

Round

Silt Curtain Efficiency (%)

Individual

Overall-average

For silt curtain at grab dredger for LPS Pipeline

1

N/A

87.01 (*)

2

87.25

3

86.77

For silt curtain at grab dredger for BPPS Pipeline

1

83.89

92.59

2

96.27

3

97.61

For silt curtain at jetting machine for both BPPS and LPS Pipelines

1

99.74

96.05

2

99.88

3

88.54

Remark: (*) Only representative SS data for Rounds 2 and 3 of the pilot test were used for determination of silt curtain efficiency with respect to fact that the relatively low SS levels were detected inside silt curtain for the dredging operation during Round 1 of the pilot test.

2.5             Marine Mammal Monitoring

2.5.1       Monitoring Requirements

2.5.1.1  Vessel-based Line Transect Survey

In accordance with the Updated EM&A Manual, vessel-based marine mammal survey by means of systematic line-transect boat survey was undertaken to examine the distribution and encounter rate of Finless Porpoise (FP) in southern Lantau where a majority of Project construction works would take place.  Survey transects covered three survey areas for line-transect boat surveys, namely Southwest Lantau (SWL), Southeast Lantau (SEL) and Lamma (LM) are presented in Figure 2.5.  The methodology of the survey is consistent and compatible with that adopted in the EIA baseline surveys as well as the long-term marine mammal monitoring programme conducted by AFCD since 1995 to allow potential comparisons and pooling data for analysis.  Vessel-based line transect marine mammal surveys are conducted during construction of the LNG Terminal.  Each transect line is surveyed twice per month.  The detailed methodology is presented in the Updated EM&A Manual.

2.5.1.2  Passive Acoustic Monitoring (PAM)

In accordance with the Updated EM&A Manual, underwater PAM survey using C-POD (Cetacean-Porpoise Detector) was conducted at five locations as presented in Figure 2.6.  C-PODs are left in place during construction of the LNG Terminal.  Such duration should allow for a robust record of marine mammal usage of the area to be obtained and allow for the inter-seasonal differences already known for finless porpoises.  The C-PODs have to be serviced every two to four months, subject to review on an as-needed basis, to download accumulated data and replace batteries.

2.5.2       Action and Limit Levels for Marine Mammal Monitoring

The Action and Limit Levels for marine mammal monitoring are established using encounter rate calculated from the six-month baseline vessel-based line transect surveys from the three survey areas as a whole in accordance with the Updated EM&A Manual.  The combined baseline encounter rate will be used to compare with the encounter rate obtained during construction phase monitoring calculated from last three month’s monitoring data (i.e. running quarterly value).  This approach would allow natural seasonal fluctuations in FP encounter rate to be accounted for, and allow data to be reviewed every month such as appropriate remedial actions could be taken timely if the threshold values are triggered.  The Action and Limit Levels are provided in Table 2.10.

Table 2.10    Action and Limit Levels for Marine Mammal Monitoring

Monitoring Area

Action Level

Limit Level

SWL, SEL and LM as a whole

Running quarterly STG < 1.12 & ANI < 2.18 

Two consecutive running quarterly STG < 1.12 & ANI < 2.18

Notes:

STG = Encounter Rate of Number of Porpoise Sightings

ANI = Encounter Rate of Number of Porpoises

Action / Limit Levels will be triggered if both STG and ANI fall below the criteria.

The Event and Action Plan for marine mammal monitoring can be referred to relevant Annexes of the associated Monthly EM&A Reports for the reporting period.

2.5.3       Monitoring Results

2.5.3.1  Vessel-based Line Transect Survey

A total of 24 vessel-based line transect surveys were conducted during the reporting period.  The FPs sighted in the three survey areas, SWL, SEL and LM, in the reporting period are presented in Figure 2.7.

The running quarterly STG and ANI for the combined survey areas from SWL, SEL and LM during the reporting period are summarised in Table 2.11.

Table 2.11    Running Quarterly STG and ANI for Finless Porpoise

Survey Period

On-effort (km)

No. of Sighting

No. of Porpoise

STG

ANI

Running STG

Running ANI

Dec 2020

219.30

3

7

1.36

3.18

-

-

Jul 2021

375.86

0

0

0.00

0.00

0.83

2.95

Aug 2021

379.00

2

10

0.53

2.64

Sep 2021

331.64

7

22

2.11

6.63

Notes:

Only data collected at Beaufort Sea State 2 or below were included for encounter rate analysis.

Running STG and Running ANI were calculated by combining three consecutive survey months data (i.e. running STG/ANI for Sep 2021 were calculated by combining the data in Jul – Sep 2021).

The running quarterly values of encounter rate in terms of STG and ANI were 0.83 and 2.95, respectively.  Therefore, there were no breaches of Action and Limit Levels for marine mammal monitoring in the reporting period.

2.5.3.2  Underwater PAM Survey

Five C-POD units have been deployed at the five locations since the commencement of construction for FEP-01/558/2018/A on 27 November 2020.  These units will be serviced every two to four months, subject to review on an as-needed basis, to download accumulated data and replace batteries.  The latest round of C-POD servicing was conducted in early July 2021.

2.5.4       Comparison of Monitoring Results with EIA Predictions

The results of the vessel-based line transect marine mammal surveys within the reporting period indicated that there were no breaches of Action and Limit Levels for marine mammal monitoring, indicating that there were no unacceptable/ unforeseen changes in FP distribution as a result of jacket installation works.  It should be noted that with implementation of the recommended mitigation measures during construction phase of the Project, no unacceptable impacts on FPs were anticipated as documented in the approved EIA Report.  The recommended mitigation measures have been implemented/ adopted during the course of piling works, including the use of structural jacket and bubble curtain to enclose the pile installation work, acoustic decoupling of noisy equipment on work barges, piling with ramp-up procedures; use of hydraulic hammering with noise reduction system; avoidance of underwater percussive piling at night time and during the peak occurrence season of FP; and monitoring of marine mammal exclusion zone with a radius of 500m.  The review on the encounter rates of FP (i.e. 0.83 for running STG and 2.95 for running ANI) for the reporting period, at which no Action / Limit Level exceedances in marine mammal monitoring were triggered during the piling works.  Therefore, variation between the EIA study predictions and the EM&A monitoring results was not found.

2.6             Marine Mammal Exclusion Zone Monitoring

2.6.1       Monitoring Requirements

According to Condition 3.7 of FEP-02/558/2018/A, Condition 3.8 of FEP-03/558/2018/B, Section 9.11.3 of the approved EIA Report and Section 7 of the Updated EM&A Manual, marine mammal exclusion zone monitoring is required during dredging / jetting operations for construction of BPPS Pipeline or LPS Pipeline and during percussive piling works for construction of the Jetty.  Marine mammal exclusion zone requirements are presented in Table 2.12.

Table 2.12    Marine Mammal Exclusion Zone Requirements

Activity

Exclusion Zone

Requirement

Marine dredging or jetting operations for construction of BPPS Pipeline or LPS Pipeline

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.

Percussive piling works for construction of the Jetty

500m

Before percussive piling commences, the exclusion zone must have been continuously clear of marine mammals for 30 minutes.  During percussive piling, if marine mammals are spotted within the exclusion zone, percussive piling 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.

2.6.2       Monitoring Results

Marine mammal exclusion zone monitoring was conducted during the reporting period when marine dredging / jetting operations for construction of BPPS / LPS Pipeline and percussive piling works for construction of the Jetty were undertaken.  No sightings of marine mammals were observed during marine mammal exclusion zone monitoring in the reporting period.  The monitoring results for marine mammal exclusion zone monitoring in the reporting period is summarised in Table 2.13.

 

 

Table 2.13    Monitoring Results for Marine Mammal Exclusion Zone Monitoring

Date

Active works activities

Monitoring results

11, 12, 14-16, 18, 19, 21 Dec 2020

Percussive piling works for construction of the Jetty

No sightings of marine mammals within the marine mammal exclusion zone

2, 3, 5, 7, 12, 14-17 Jul 2021

5-7, 9, 11, 13, 14, 21, 23-27 Aug 2021

13, 16, 18 Sep 2021

27 Jan 2021

Marine dredging operation at Double Berth Jetty for LPS Pipeline (1)

1, 2, 4 Feb 2021

23, 26, 27 Feb 2021

De-burial (pre-trenching) of pre-installed pipeline by Mass Flow Excavator for LPS Pipeline

5, 6, 13-15 Mar 2021

24 Apr 2021

Marine dredging operation at Subsea Cable Sterile Corridors for BPPS Pipeline

16-28 May 2021

28-30 Apr 2021

Marine dredging operation at Urmston Road for BPPS Pipeline

1-26, 30, 31 May 2021

1-12 Jun 2021

5, 6, 8-18, 22-26 Jul 2021

Marine jetting operation at West Lamma Channel for LPS Pipeline

8-16, 24-31 Aug 2021

Marine jetting operation at South of Shek Kwu Chau to Lamma Channel for LPS Pipeline

1-8, 12-14, 17-23 Sep 2021