Revision History

Rev.

Description of Modification

Date

 

A.

 

First Issue for Comments

 

13/04/2023

 

B.

 

Revised according to SOR’s comments

 

19/04/2023

 

 

 

 

 

 


CONTENTS

Executive Summary..................................................................................................................... 1

1.         Basic Contract Information............................................................................................... 7

2.         Noise.............................................................................................................................. 12

3.         Water Quality................................................................................................................. 16

4.         Waste............................................................................................................................. 24

5.         Landfill Gas Monitoring.................................................................................................. 25

6.         Summary of Exceedance, Complaints, Notification of Summons and Prosecutions.......... 30

7.         EM&A Site Inspection..................................................................................................... 32

8.         Future Key Issues........................................................................................................... 33

9.         Conclusions and Recommendations................................................................................ 35

 

 

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                    Impact Monitoring Schedule

Appendix E                    Event/Action Plan

 

Appendix F                    Water Quality and Landfill Gas Equipment Calibration Certificate

Appendix G                    Water Quality and Landfill Gas Monitoring Data

Appendix H                    Waste Flow Table

 

Appendix I                     Site Inspection Proforma

 

Appendix J                     Complaint Log

 

Appendix K                    Exceedance Report(s)

 

 

 

 

 

 

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/A) 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.  This is the 37th Monthly 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 March to 31 March 2023.

A4. 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

A5. Key activities carried out in this reporting period for the Contract included the followings:

 

Administration Building

-            Installation of glass wall, glass balustrade building services, electrical switchboard, and lift

-            carrying out interior finishes at 2/F, 3/F and 4/F

-            Construction of staircase

-            Construction of block wall in the pipe duct

Chemical building

-            Installation of handrail on the dosing platform

-            Construction of Staircases

-            Installation of building services, mechanical equipment, cable laying

-            Underground utility construction work

Main Electrical & Central Chiller Plant Building

-            Construction of fuel tank room

-            Installation metal Doors, chillers, building services, electrical switchboard, cable laying

ActiDAFF

-            Underground utility construction work


 

-            Laying of roof floor screed and tiles

-            Erection and dismantling of scaffolding, installation of mechanical

Product Water Storage Tank Building

-            Resin Injection Work & Water Test for 1 Water Tanks

-            Installation of Cat Ladders in Water Tanks, louvres and cladding

-            Installation of Louvres & Metal Cladding

-            Underground utility construction

OSCG Building

-            Installation of Design for Manufacturing and Assembly Panel

-            Installation of metal door

-            Underground utility construction work

-            Installation of building services and mechanical equipment

Reverse Osmosis Building

-           Installation of Design for Manufacturing and Assembly Panels at East Sides

-           Installation of metal door, hand railings, Louvres & Windows

-           Underground utility construction

-           Installation of building services, electrical switchboard, mechanical equipment, steel pipe, louvres & windows and Glass Reinforced Plastics pipe

Post Treatment Building

-           Installation of Louvres & Windows, and metal door

-           Installation of Design for Manufacturing and Assembly Panels

-           roller shutter, building services, mechanical equipment and Glass Reinforced Plastics pipe

-           Installation of building services, cable laying, Installation of mechanical equipment, steel pipe

-           Underground utility construction

Inspection corridor

-            Construction of bondek for segments 7

-            construction of staircase 8

CO2 Tanks

-           Installation of pipes and building services

Outfall Shaft

-           Dredging for diffuser pipe; Glass Reinforced Plastics Diffuser Pipe installation; rock material back fill

-           Shafts backfill rock and excavation and lateral support (ELS) removal

Combined Shaft

-           Staircases and internal finishing,

-           Waterproofing works

-           Installation of window, doors, louvers, building services and electrical

-           Underground utility construction work


 

Pump room

-           internal finishing, waterproofing; E&M installation

Other

-           Rock anchor installation; rock drilling, grouting

 

 

A6.     The major environmental impacts brought by the above construction works include:

 

-                 Construction dust and noise generation from construction works, excavation works, rock cutting works and pipe piling driving works;

-                 Waste generation from the construction activities; and

-                 Impact on water quality from marine construction works and inland construction works.

A7.     The key environmental mitigation measures implemented for the Contract in this reporting period associated with the above construction works include:

 

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

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

-                 Deployment of temporary silt curtain in the area where marine construction works were conducted and deployment of water sedimentation tanks for treatment of wastewater at inland and marine areas before discharge; and

-                 Sorting and storage of general refuse and construction waste; and

 

Summary of exceedance & investigation & follow-up

 

A8. No noise monitoring was conducted during the reporting period since there are no Contract -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.

A9. The EM&A works for water quality were conducted during the reporting period in accordance with the EM&A Manual.

A10. Sixty (60) of the general water quality monitoring results of Suspended Solids (SS) obtained had exceeded the Action Level. Fifty (50) of the general water quality monitoring results of SS obtained during the reporting period had exceeded the Limit Level.

A11. Investigation on the reason of exceedance has been carried out, where the exceedances of SS on 2, 5, 7, 9, 11, 14, 16, 18, 21, 23 and 28 Mach 2023 were concluded to be unrelated to the Contract as detailed in the Incident Reports on Action Level or Limit Level Non- compliance along with supporting materials in Appendix K.


 

A12. In this reporting period, 54 times of landfill gas monitoring were conducted at TKO Area 137 (Ch0+750 - Ch0+780). No action or limit level exceedance was recorded during the reporting period.

A13. Joint site inspections of the construction work by ET and IEC were carried out on 7, 14, 22 and 31 March 2023 to audit the mitigation measures implementation status. Observations and recommendations were recorded in the site inspection checklists and provided to the contractors together with the appropriate follow-up actions where necessary.

 

Complaint Handling and Prosecution

 

A14. No environmental complaint, notification of summons and prosecution was received in the reporting period.

 

Reporting Change

 

A15. There was no change to be reported that may affect the on-going EM&A programme.

 

Summary of Upcoming Key Issues and Key Mitigation Measures

 

A16. Key activities anticipated in the next reporting period for the Contract will include the followings:

 

Administration Building

-            Installation of glass wall, glass balustrade building services, electrical switchboard, and lift

-            carrying out interior finishes at 2/F, 3/F and 4/F

-            Construction of staircase

-            Construction of block wall in the pipe duct

Chemical building

-            Installation of handrail on the dosing platform

-            Construction of Staircases

-            Installation of building services, mechanical equipment, cable laying

-            Underground utility construction work

Main Electrical & Central Chiller Plant Building

-            Construction of fuel tank room

-            Installation metal Doors, chillers, building services, electrical switchboard, cable laying

ActiDAFF

-            Underground utility construction work

-            Laying of roof floor screed and tiles

-            Erection and dismantling of scaffolding, installation of mechanical

Product Water Storage Tank Building

-            Resin Injection Work & Water Test for 1 Water Tanks


 

-            Installation of Cat Ladders in Water Tanks, louvres and cladding

-            Installation of Louvres & Metal Cladding

-            Underground utility construction

OSCG Building

-            Installation of Design for Manufacturing and Assembly Panel

-            Installation of metal door

-            Underground utility construction work

-            Installation of building services and mechanical equipment

Reverse Osmosis Building

-            Installation of Design for Manufacturing and Assembly Panels at East Sides

-            Installation of metal door, hand railings, Louvres & Windows

-            Underground utility construction

-            Installation of building services, electrical switchboard, mechanical equipment, steel pipe, louvres & windows and Glass Reinforced Plastics pipe

Post Treatment Building

-            Installation of Louvres & Windows, and metal door

-            Installation of Design for Manufacturing and Assembly Panels

-            roller shutter, building services, mechanical equipment and Glass Reinforced Plastics pipe

-            Installation of building services, cable laying, Installation of mechanical equipment, steel pipe

-            Underground utility construction

Inspection corridor

-            Construction of bondek for segments 7

-            construction of staircase 8

CO2 Tanks

-              Installation of pipes and building services

Outfall Shaft

-            Dredging for diffuser pipe; Glass Reinforced Plastics Diffuser Pipe installation; rock material back fill

-            Shafts backfill rock and excavation and lateral support (ELS) removal

Combined Shaft

-            Staircases and internal finishing,

-            Waterproofing works

-            Installation of window, doors, louvers, building services and electrical

-            Underground utility construction work

Pump room

-            internal finishing, waterproofing; E&M installation

Other

-            Rock anchor installation; rock drilling, grouting


 

A17. The major environmental impacts brought by the above construction works will include:

 

-                 Construction dust and noise generation from excavation and construction works;

-                 Waste generation from construction activities; and

-                 Impact on water quality from marine construction works and inland construction works.

A18. The key environmental mitigation measures for the Contract in the coming reporting period associated with the above construction works will include:

 

-                 Reduction of noise from equipment and machinery on-site;

-                 Dust suppression by regular wetting and water spraying for construction works and at main haul road;

-                 Sorting and storage of general refuse and construction waste; and

-                 Deployment of temporary silt curtain in the area where marine construction works were conducted and deployment of water sedimentation tanks for treatment of wastewater at inland and marine areas before discharge.


 

1.           Basic Contract Information

Background

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

1.2.        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.

1.3.        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/A) to Water Supplies Department (WSD); and granted the Further Environmental Permit (No. FEP- 01/503/2015/A) to AJCJV for the Contract.

The Reporting Scope

1.4.        This is the 37th Monthly EM&A Report for the Contract which summarizes the key findings of the EM&A programme during the reporting period from 1 March to 31 March 2023.

Contract Organization

1.5.        The Contract Organization structure for Construction Phase is presented in Figure 1.1.

 


 

                                                                                Figure 1.1       Contract Organization Chart

 

1.6.        Contact details of the key personnel are presented in Table 1.1 below:


 

                                Table 1.1        Contact Details of Key Personnel

 

Party

Position

Name

Telephone no.

Contract Proponent (Water Supplies Department)

 

SE/CM2

 

Milton Law

 

2634-3573

 

Supervising Officer (Binnies Hong Kong Limited)

Project Manager

 

Christina Ko

 

2608-7302

Chief Resident Engineer

 

Roger Wu

 

6343-1002

 

The Jardine Engineering Corporation, Limited, China State Construction Engineering (Hong Kong) Limited and Acciona Agua, S.A. Trading

Project Manager

Stephen Yeung

 

2807-4665

Environmental Monitoring Manager

 

Brian Kam

 

9456-9541

Acuity Sustainability Consulting Limited

Environmental Team Leader

 

Jacky Leung

 

2698-6833

 

ANewR Consulting Limited

Independent Environmental Checker (IEC)

 

Louis Kwan

 

2618-2831

 

Summary of Construction Works

1.7.        Details of the major construction activities undertaken in this reporting period are shown as below. The master programme is presented in Appendix A.

1.8.        Key activities carried out in this reporting period for the Contract included the followings:

 

Administration Building

-            Installation of glass wall, glass balustrade building services, electrical switchboard, and lift

-            carrying out interior finishes at 2/F, 3/F and 4/F

-            Construction of staircase

-            Construction of block wall in the pipe duct

Chemical building

-            Installation of handrail on the dosing platform

-            Construction of Staircases

-            Installation of building services, mechanical equipment, cable laying

-            Underground utility construction work

Main Electrical & Central Chiller Plant Building

-            Construction of fuel tank room


 

-           Installation metal Doors, chillers, building services, electrical switchboard, cable laying

ActiDAFF

-            Underground utility construction work

-            Laying of roof floor screed and tiles

-            Erection and dismantling of scaffolding, installation of mechanical

Product Water Storage Tank Building

-            Resin Injection Work & Water Test for 1 Water Tanks

-            Installation of Cat Ladders in Water Tanks, louvres and cladding

-            Installation of Louvres & Metal Cladding

-            Underground utility construction

OSCG Building

-            Installation of Design for Manufacturing and Assembly Panel

-            Installation of metal door

-            Underground utility construction work

-            Installation of building services and mechanical equipment

Reverse Osmosis Building

-              Installation of Design for Manufacturing and Assembly Panels at East Sides

-              Installation of metal door, hand railings, Louvres & Windows

-              Underground utility construction

-              Installation of building services, electrical switchboard, mechanical equipment, steel pipe, louvres & windows and Glass Reinforced Plastics pipe

Post Treatment Building

-              Installation of Louvres & Windows, and metal door

-              Installation of Design for Manufacturing and Assembly Panels

-              roller shutter, building services, mechanical equipment and Glass Reinforced Plastics pipe

-              Installation of building services, cable laying, Installation of mechanical equipment, steel pipe

-              Underground utility construction

Inspection corridor

-            Construction of bondek for segments 7

-            construction of staircase 8

CO2 Tanks

-            Installation of pipes and building services

Outfall Shaft

-            Dredging for diffuser pipe; Glass Reinforced Plastics Diffuser Pipe installation; rock material back fill

-            Shafts backfill rock and excavation and lateral support (ELS) removal

Combined Shaft

-            Staircases and internal finishing,


 

-            Waterproofing works

-            Installation of window, doors, louvers, building services and electrical

-            Underground utility construction work

Pump room

-            internal finishing, waterproofing; E&M installation

Other

-            Rock anchor installation; rock drilling, grouting

 

 

1.9.        A summary of the valid permits, licences, and/or notifications on environmental protection for this Contract is presented in Table 1.2.

Table 1.2 Summary of the Status of Valid Environmental Licence, Notification, Permit and Documentations

 

 

Permit/ Licences

Valid Period

 

Status

 

Remark

From

To

Environmental Permit

EP-503/2015/A

Throughout the Contract

Valid

-

FEP - 01/503/2015/A

Throughout the Contract

Valid

-

Notification of Construction Works under the Air Pollution Control (Construction Dust) Regulation (Form NA)

451539

Throughout the Contract

Valid

-

Billing Account for Disposal of Construction Waste

7036276

Throughout the Contract

Valid

-

Chemical Waste Producer Registration

5213-839-A2987-01

Throughout the Contract

Valid

-

Wastewater Discharge Licence (Land and Marine works)

WT00035775-2020

23/08/2021

31/07/2025

Valid

-

Marine Dumping Permits

EP/MD/23-053

07/12/2022

30/03/2023

Expired

-

EP/MD/23-122

31/03/2023

30/06/2023

Valid

-

Construction Noise Permit

GW-RE1338-22

22/12/2022

21/06/2023

Valid

-

 

1.10.    The status for all environmental aspects is presented in Table 1.3.


 

Table 1.3 Summary of Status for Key Environmental Aspects under the EM&A Manual

 

Parameters

Status

Water Quality

Baseline Monitoring under EM&A Manual

The baseline water quality monitoring was conducted between 12 May 2020 to 6 Jun 2020.

Impact Monitoring

On-going

Noise

 

Baseline Monitoring

The baseline noise monitoring result has been

reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4

Impact Monitoring

On-going

Waste Management

Mitigation Measures in Waste Management Plan

On-going

Landfill Gas

Regular Monitoring when construction works are within the

250 m Consultation Zone

 

On-going

Environmental Audit

Site Inspection covering Measures of Air Quality, Noise Impact, Water Quality, Waste, Ecological Quality,

Fisheries, Landscape and Visual

 

On-going

 

1.11.    Other than the EM&A work by ET, environmental briefings, trainings, and regular environmental management meetings were conducted, in order to enhance environmental awareness and closely monitor the environmental performance of the contractors.

 

1.12.    The EM&A programme has been implemented in accordance with the recommendations presented in the approved EIA Report and the EM&A Manual. A summary of implementation status of the environmental mitigation measures for the construction phase of the Contract during the reporting period is provided in Appendix C.


 

 

 

 

 

 

2.           Noise

Monitoring Requirements

2.1.        To ensure no adverse noise impact, noise monitoring is recommended to be carried out within 300m radius from the nearby noise sensitive receivers (NSRs), during construction phase. The NSRs selected as monitoring station are (i) NSR4 - Creative Secondary School, (ii) NSR24 - PLK Laws Foundation College, and (iii) NSR31 - School of Continuing and Professional Studies - CUHK respectively.

 

2.2.        Construction noise level were measured in terms of the A-weighted equivalent continuous sound pressure level (LAeq). Leq 30min was used as the monitoring parameter for the time period between 0700 and 1900 on normal weekdays. Construction works would follow stipulations of the valid Construction Noise Permits if works had to be conducted during restricted hours or public holidays. Table 2.1 summarizes the monitoring parameters, frequency, and duration of the impact noise monitoring.

Table 2.1        Noise Monitoring Parameters, Time, Frequency and Duration

 

Time

Duration

Interval

Parameters

 

Daytime: 0700-1900

Day time: 0700-1900

(during normal weekdays)

Continuously in

Leq 5min/Leq 30min (average of 6 consecutive Leq 5min)

 

Leq 30min

L10 30min & L90 30min

 

Monitoring Locations

2.3.        The monitoring locations were normally made at a point 1m from the exterior of the NSRs building façade and be at a position 1.2m above the ground. A correction of +3dB(A) should be made to the free-field measurements.

 

2.4.        According to the environmental findings detailed in the EIA report and Baseline Monitoring Report, the designated locations for the construction noise