Revision History

Rev.

Description of Modification

Date

1.

1st Issue

19/12/2024

2.

2nd Issue

16/01/2025

3.

3rd Issue

20/01/2025

 

CONTENTS

Executive Summary 1

Basic Project Information 7

Noise 14

Water Quality 18

Waste 27

Landfill Gas Monitoring 28

Summary of Exceedance, Complaint, Notification of Summons and Prosecutions 32

EM&A Site Inspection 35

Conclusions and Recommendations 36

 

Appendix A

Master Programme

Appendix B

Overview of Desalination Plant in Tseung Kwan O

Appendix C

Summary of Implementation Status of Environmental Mitigation

Appendix D

Water Quality Monitoring Graphical Presentation

Appendix E

Summary of Exceedances

Appendix F

Waste Flow Table

Appendix G

Complaint Log

Appendix H

Event/Action Plan for Water Quality Monitoring

Appendix I

Event/Action Plan for Construction Noise Exceedance

Appendix J

Event/Action Plan for Coral Monitoring Exceedance

 

Acuity Sustainability Consulting Limited

Executive Summary

 

Introduction

 

A1. The Project, Design, Build and Operate First Stage of Tseung Kwan O Desalination Plant (TKODP), is a Designated Project under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO) and is currently governed by a Further Environmental Permit (EP No. FEP – 01/503/2015/B) for the construction and operation of the Contract.

A2. In accordance with the Environmental Monitoring and Audit (EM&A) Manual for the Contract, EM&A works for marine water quality, noise, waste management and ecology should be carried out by Environmental Team (ET), Acuity Sustainability Consulting Limited (ASCL), during the construction phase of the Contract.

A3. According to the contractor’s information, the works of TKODP were substantially completed on 30 June 2024 and the plant commenced the operation phase on 1 July 2024. The outstanding construction works were being carried out during this reporting period.

A4. This is the 19th Quarterly EM&A Report, prepared by ASCL, for the Contract summarizing the monitoring results and audit findings of the EM&A programme at and around Tseung Kwan O Area 137 (TKO 137) during the reporting period from 1 September 2024 to 30 November

2024.

 

A5. The EM&A programme for this contract has covered environmental monitoring on construction noise level at selected NSRs and Contractor’s environmental performance auditing in the aspects of construction dust, construction noise, water quality, waste management, Landscape and Visual and Ecology.

Summary of Main Works Undertaken & Key Mitigation Measures Implemented

 

A6. Key activities carried out in this reporting period for the Project included the followings:

All Area

·           Security Fence footing construction work

·           Footpath Construction

·           Landscape Construction

·           Irrigation System Construction

·           Water Pressure Test for FS and PL system

·           Landscape planting work

·           Traffic signage work

·           E&M Works and Mechanical Installation

 

 

PWST

·           Water Test in Tank A

·           Waterproofing work at Roof Slab on Tank A

·     Installation of building services, electrical switchboards and cables Installation of mechanical equipment, steel pipe, Pressure Test

Administration Building

·           External wall aluminum features installation

·           Finishing works for dog house

·           Minor Installation of building services, electrical switchboards & cables, Pressure Test, T&C

·           Fitting out works

·           Painting Works

Chemical building

·           Defect rectification

·           Repairing the defects inside the dangerous store

ActiDAFF

·           Installation of access opening covers for filtered water tank

·           Carrying out finishing works for staircase no. 3.

·           Minor Installation of mechanical equipment, piping system

·           Minor Installation of building services, electrical switchboards and cables, Installation of FRP Enclosure System

Product Water Storage Tank Building

·           Minor Installation of building services, cable laying and termination, PV Panel Installation, Testing & Commissioning

OSCG Building

·           Protective Coating for DG Rooms

·           Installation of Railing on Brine Maker Tank

·           Minor Installation of building services, cables and pipe works, T&C

·           Tank surface cleaning, T&C

Reverse Osmosis Building

·           Installation of Signage, AP doors, sanitary fitting, sanitary ware in toilet, tiling work and water meter cabinets

·                    Minor Installation of building services, minor cable laying and termination, Testing & Commissioning, PV Panel Installation

Post Treatment Building

·           Installation of Cat Ladders in Water Tanks

·           Placing Soil Mix at Roof

·           Curb Construction for Rescue Opening at Water Tanks

 

 

·           Installation of building services, piping system, mechanical equipment and piping system, Pressure Test

Inspection gallery

·           Construction of roof tiling works

·           Installation of steel balustrade at roof

·           Installation of movement joints

·           Construction of block works

·           Minor Installation of building service, T&C

RO and Electrical Building

·           Installation of Glass House

·           Minor Installation of building services, electrical switchboards and cables

·           Minor Installation of mechanical pipework and raised Floor,

·           PV Panel Installation, T&C

Chiller plant & Main Electrical Building

·           Minor Installation of building services, electrical switchboards and cables, Pressure Test, T&C

Others

·            Slope works*

·            Construction works of extended access road

Remark: *The slope works were completed in October 2024, and there was no site activities related to the slope works conducted in November 2024.

 

A7. The major environmental impacts brought by the above construction works and slope works include:

·     Construction dust and noise generation from excavation works, construction works;

·     Waste generation from the construction activities

 

A8. The key environmental mitigation measures implemented for the Project in this reporting period associated with the above construction works include:

·     Dust suppression by regular wetting and water spraying for construction works and slope works;

·     Reduction of noise from equipment and machinery on-site and regularly inspection to machinery and plants/vehicles on-site to ensure proper functioning;

·     Sorting and storage of general refuse and construction waste;

·     Deployment of silt curtain at the inshore water outflow; and

·     Deployment protective fencing for trees.

 

Summary of Exceedance & Investigation & Follow-up

 

A9. No noise monitoring was conducted during the reporting period since there are no project- related construction activities undertaken within a radius of 300m from the monitoring locations. No exceedance of the Action Level was recorded during the reporting period.

 

A10. Referring to EM&A Manual, the general water quality monitoring should be carried out when there are marine-related construction activities undertaken. General water quality monitoring at the ten monitoring stations (CE, CF, WSR1, WSR2, WSR3, WSR4, WSR16, WSR33, WSR36 and WSR37) was ceased from 1 September 2023 due to the completion of marine-related construction works.

 

A11. The operation phase water quality was conducted from 1 September 2024 to 30 November 2024. Thirty-six (36) of the operation phase water quality monitoring results of SS obtained had exceeded the Action Level. Eighty-five (85) of the operation phase water quality monitoring results of SS obtained during the reporting period had exceeded the Limit Level. After investigation, all exceedances were concluded unrelated to the Project.

A12. The continuous monitoring of effluent quality was conducted from 1 September 2024 to 30 November 2024 in accordance with the EM&A Manual. No exceedance of the sampling was obtained during the reporting period had exceeded the Limit Level. The plant was shut down from 7 a.m. to 7 p.m. on 3 November 2024. No effluent discharge from TKODP occurred during this period. Due to the plant has suspended production, there was no effluent discharge from the TKODP during the period between 24 November 2024 and 30 November 2024.

A13. In this reporting period, 132 times of Construction Phase landfill gas monitoring were recorded at Wan Po Road (Ch0+390 – Ch0+780) and (Ch0+400 - Ch1+200). No action and limit level exceedance for methane, oxygen and carbon dioxide was recorded. The Construction Phase landfill gas monitoring was ceased from 31 October 2024.

A14. In this reporting period, Operation Phase landfill gas monitoring was conducted on 25, 26 and 27 September 2024, 9 and 10 October 2024, 14 and 15 November 2024. No exceedances of action level and limit level was observed.

A15. Operation phase monthly coral monitoring was conducted during the reporting period on 18 September 2024, 21 October 2024, 11 November 2024. There is no AL/LL exceedance during the monitoring period.

A16. Operation phase fishery monitoring for wet season 2024 was carried out on 24 and 31 August 2024. The detail of the monitoring was presented in the 4th Operation Phase Monthly EM&A Report.

 

A17. Total thirteen (13) times of Weekly site inspections of the construction works were also carried out by ET to audit the mitigation measures implementation status. Three (3) times of monthly Joint site inspections were carried out by ET and IEC.

A18. A summary of the EM&A activities in this reporting period is listed in Table I and summary of the environmental exceedance of the reporting period is tabulated in Table II.

Table I Summary Table for EM&A Activities in the Reporting Period

EM&A Activities

Sep 2024

Oct 2024

Nov 2024

Noise Monitoring

N/A

N/A

N/A

Water Quality Monitoring

3, 7, 10, 12, 14, 17, 19,

21, 24, 26 and 28

September 2024

1, 3, 5, 8, 10, 12, 15, 17,

19, 22, 24, 26, 29 and

31 October 2024

2, 5, 7, 9, 12, 16, 19, 21,

23, 26, 28 and 30

November 2024

TRC Monitoring for

Main Disinfection

 

N/A

 

N/A

 

N/A

Coral Monitoring

18 September 2024

21 October 2024

11 November 2024

Fishery Monitoring

N/A

N/A

N/A

Landfill Gas Monitoring (Construction Phase)

2, 3, 4, 5, 6, 7, 9, 10, 11,

12, 13, 14, 16, 17, 19,

20, 21, 23, 24, 25, 26,

27, 28 and 30

September 2024

1, 2, 3, 4, 5, 7, 8, 9, 10,

12, 14, 15, 16, 17, 18,

19, 21, 22, 23, 24 and

25 October 2024

 

N/A

Landfill Gas Monitoring (Operation

Phase)

 

25, 26 and 27

September 2024

 

9 and 10 October 2024

 

14 and 15 November

2024

Environmental Site Inspection

3, 10, 17 and 24

September 2024

3, 8, 15, 22 and 28

October 2024

5, 14, 18 and 26

November 2024

Continuous Monitoring of Effluent Quality

From 1 to 30

September 2024

From 1 to 31 October

2024

From 1 to 30 November

2024

Table II Summary Table for Exceedance in the Reporting Period

 

Environmental Monitoring

 

Parameter

No. of non- Project

related exceedance

Total No. of non-Project related exceedance

No. of Project

related exceedance

Total No. of Project related exceedance

AL

LL

AL

LL

Noise

Leq (30min)

N/A

N/A

N/A

N/A

N/A

N/A

Water

DO

0

0

0

0

0

0

Turbidity

0

0

0

0

0

0

 

 

Environmental Monitoring

 

Parameter

No. of non- Project related

exceedance

Total No. of non-Project related exceedance

No. of Project related

exceedance

Total No. of Project related exceedance

AL

LL

AL

LL

SS

36

85

121

0

0

0

pH

0

0

0

0

0

0

Salinity

0

0

0

0

0

0

TRC

0

0

0

0

0

0

 

Landfill Gas

O2

0

0

0

0

0

0

CH4

0

0

0

0

0

0

CO2

0

0

0

0

0

0

 

Continuous Monitoring of Effluent Quality

Temperature

0

0

0

0

0

0

pH

0

0

0

0

0

0

Salinity

0

0

0

0

0

0

Total Residual Chlorine

0

0

0

0

0

0

Suspended Solids

0

0

0

0

0

0

Iron-Soluble

0

0

0

0

0

0

Total Inorganic Nitrogen

 

0

 

0

 

0

 

0

 

0

 

0

Total Phosphorus

0

0

0

0

0

0

Sodium

Metabisulphite

0

0

0

0

0

0

Anti-scalant as Reactive Phosphorus*

 

0

 

0

 

0

 

0

 

0

 

0

Coral Monitoring

/

0

0

0

0

0

0

Fisheries Monitoring

/

N/A

N/A

N/A

N/A

N/A

N/A

*Remark: Anti-scalant water quality testing will only be conducted whenever anti-scalant dosage is adopted.

 

Complaint Handling and Prosecution

 

A19. No environmental complaint was received during the reporting period. No notifications of summons or prosecution was received during the reporting period.

Reporting Change

 

A20. There was no change to be reported that may affect the on-going EM&A programme.

 

A21. According to the contractor’s information, the TKODP commenced operation phase on 1 July 2024. The outstanding construction works were being carried out during this reporting period.

Basic Project Information

 

1.           Background

The Acciona Agua, S.A. Trading, Jardine Engineering Corporation Limited and China State Construction Engineering (Hong Kong) Limited and as AJC Joint Venture (AJCJV) is contracted to carry out the Design, Build and Operate First Stage of Tseung Kwan O Desalination Plant (TKODP) under Contract No. 13/WSD/17 (the Contract).

Acuity Sustainability Consulting Limited (ASCL) is commissioned by AJCJV to undertake the Environmental Team (ET) services as required and/or implied, both explicitly and implicitly, in the Environmental Permit (EP), Environmental Impact Assessment Report (EIA Report) (Register No. AEIAR-192/2015) and Environmental Monitoring and Audit Manual (EM&A Manual) for the Contract; and to carry out the Environmental Monitoring and Audit (EM&A) programme in fulfillment of the EIA Report’s EM&A requirements and Contract No. 13/WSD/17 Specification requirements.

Pursuant to the Environmental Impact Assessment Ordinance (EIAO), the Director of Environmental Protection granted the Environmental Permit (No. EP-01/503/2015) and Variation of Environmental Permit (No. EP-01/503/2015/B) to Water Supplies Department (WSD); and granted the Further Environmental Permit (No. FEP-01/503/2015/B) to AJCJV for the Contract.