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 40th 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 June to 30 June 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 balustrade, metal cladding, building services, electrical switchboard, lift, cable laying

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

- Construction of block wall in the pipe duct.

Chemical building

- Installation of handrail, permanent door, building services, mechanical equipment, and 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

- Construction of plinths for saturator tanks

- Erection and dismantling of scaffolding, installation of mechanical equipment and piping, bubble test

- Installation of underdrain

Product Water Storage Tank Building

- Resin Injection Work & Water Test for 1 Water Tanks

- Installation of cat ladders in Water Tanks, and door

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

- Underground utility construction

OSCG Building

- Installation of Design for Manufacturing and Assembly (DfMA) Panel and metal door

- Underground utility construction work

- Installation of building services and mechanical equipment

Reverse Osmosis Building

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

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

- Installation of building services, electrical switchboard, mechanical equipment, steel pipe, Glass Reinforced Plastics (GRP) pipe and cable laying

- Underground utility construction work

Post Treatment Building

- Installation of Louvres & Windows, metal door and cat ladders

- Installation of Design for Manufacturing and Assembly(DfMA) Panels

- Installation of building services, mechanical equipment and GRP pipe

- Underground utility construction work

Inspection corridor

- Construction of bondek for segments 7

- construction of staircase 8

CO2 Tanks

- Installation of pipes and building services

Outfall Shaft

- GRP Diffuser Pipe installation and rock material backfill

Combined Shaft

- Installation of building services, electrical equipment, switchboard, cable laying, mechanical equipment and pipes, stoplogs and band screens

- Underground utility construction work

- Staircases and internal finishing

Pump room

- internal finishing and screeding

Other

- Excavation works, access erection, soil anchor installation and grouting construction works at the slope toe

- Foundation & structure construction at Elevated Walkway

- Watermain works at CLP 132 kV Substation

- Concrete Breaking, structure construction of Wave Deflector Wall at seawall area

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. Twenty-two (22) of the general water quality monitoring results of Suspended Solids (SS) obtained had exceeded the Action Level. Eighteen (18) 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 1, 8, 10, 13, 15 and 27 June 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, 75 times of landfill gas monitoring were conducted at TKO Area 137 (Ch1+340 - Ch1+600). 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 6, 13, 20 and 27 June 2023 to audit the mitigation measures implementation status. Observations and reminders 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 balustrade, metal cladding, building services, electrical switchboard, lift, cable laying

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

- Construction of block wall in the pipe duct.

Chemical building

- Installation of handrail, permanent doors, building services, mechanical equipment, and 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

- Construction of plinths for saturator tanks

- Erection and dismantling of scaffolding, installation of mechanical equipment and piping, bubble test

- Installation of underdrain

Product Water Storage Tank Building

- Resin Injection Work & Water Test for 1 Water Tanks

- Installation of cat ladders in Water Tanks, and door

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

- Underground utility construction

OSCG Building

- Installation of Design for Manufacturing and Assembly (DfMA) Panel and metal door

- Underground utility construction work

- Installation of building services and mechanical equipment

Reverse Osmosis Building

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

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

- Installation of building services, electrical switchboard, mechanical equipment, steel pipe, Glass Reinforced Plastics (GRP) pipe and cable laying

- Underground utility construction work

Post Treatment Building

- Installation of Louvres & Windows, metal door and cat ladders

- Installation of Design for Manufacturing and Assembly (DfMA) Panels

- Installation of building services, mechanical equipment and GRP pipe

- Underground utility construction work

Inspection corridor

- Construction of bondek for segments 7

- construction of staircase 8

CO2 Tanks

- Installation of pipes and building services

Outfall Shaft

- GRP Diffuser Pipe installation and rock material backfill

Combined Shaft

- Installation of building services, electrical equipment, switchboard, cable laying, mechanical equipment and pipes, stoplogs and band screens

- Underground utility construction work

- Staircases and internal finishing

Pump room

- internal finishing and screeding

Other

- Excavation works, access erection, soil anchor installation and grouting construction works at the slope toe

- Foundation & structure construction at Elevated Walkway

- Watermain works at CLP 132 kV Substation

- Concrete Breaking, structure construction of Wave Deflector Wall at seawall area

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

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 40th Monthly EM&A Report for the Contract which summarizes the key findings of the EM&A programme during the reporting period from 1 June to 30 June 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)

Mr. CHAN Yi

Chun, Alex

2618-2831

Summary of Construction Works

1.7. Details of the major construction activities undertaken in this reporting period are shown 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 balustrade, metal cladding, building services, electrical switchboard, lift, cable laying

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

- Construction of block wall in the pipe duct.

Chemical building

- Installation of handrail, permanent equipment, and cable laying

- Underground utility construction work

doors,

building

services,

mechanical

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

- Construction of plinths for saturator tanks

- Erection and dismantling of scaffolding, installation of mechanical equipment and piping, bubble test

- Installation of underdrain

Product Water Storage Tank Building

- Resin Injection Work & Water Test for 1 Water Tanks

- Installation of cat ladders in Water Tanks, and door

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

- Underground utility construction

OSCG Building

- Installation of Design for Manufacturing and Assembly (DfMA) Panel and metal door

- Underground utility construction work

- Installation of building services and mechanical equipment

Reverse Osmosis Building

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

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

- Installation of building services, electrical switchboard, mechanical equipment, steel pipe, Glass Reinforced Plastics (GRP) pipe and cable laying

- Underground utility construction work

Post Treatment Building

- Installation of Louvres & Windows, metal door and cat ladders

- Installation of Design for Manufacturing and Assembly (DfMA) Panels

- Installation of building services, mechanical equipment and GRP pipe

- Underground utility construction work

Inspection corridor

- Construction of bondek for segments 7

- construction of staircase 8

CO2 Tanks

- Installation of pipes and building services Outfall Shaft

- GRP Diffuser Pipe installation and rock material backfill

Combined Shaft

- Installation of building services, electrical equipment, switchboard, cable laying, mechanical equipment and pipes, stoplogs and band screens

- Underground utility construction work

- Staircases and internal finishing

Pump room

- internal finishing and screeding Other

- Excavation works, access erection, soil anchor installation and grouting

construction works at the slope toe

- Foundation & structure construction at Elevated Walkway

- Watermain works at CLP 132 kV Substation

- Concrete Breaking, structure construction of Wave Deflector Wall at seawall area

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	-
WT00044188-2023	16/06/2023	30/06/2028	Valid	For Plant T&C and operation
Marine Dumping Permits
EP/MD/23-122	31/03/2023	30/06/2023	Expired in the reporting period	-
Construction Noise Permit
GW-RE1338-22	22/12/2022	21/06/2023	Expired in the reporting period	-

Permit/ Licences

Valid Period

Status

Remark

From

GW-RE0640-23

22/06/2023

21/12/2023

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 monitoring are listed in Table 2.2 below.

Table 2.2 Noise Sensitive Receivers

NSR ID	Noise Sensitive Receivers	Monitoring Location	Position
NSR 4	Creative Secondary School	Roof Floor	1 m from facade
NSR 24	PLK Laws Foundation College	Pedestrian Road on Ground Floor	Free-field
NSR 31	School of Continuing and Professional Studies - CUHK	Roof Floor	1 m from facade

2.5. Three noise monitoring locations for impact monitoring at the nearby sensitive receivers are shown in Figure 2.1-2.3.

Figure 2.3 NSR31 School of Continuing and Professional Studies - CUHK

Impact Monitoring Methodology

2.6. Integrated sound level meter will be used for the noise monitoring. The meter will be in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications. Immediately prior to and following each noise measurement the accuracy of the sound level meter will be checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements will be accepted as valid only if the calibration levels before and after the noise measurements agree to within 1.0 dB(A).

2.7. Noise measurements were not made in the presence of fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

Action and Limit Levels

2.8. The Action/Limit Levels are in line with the criteria of Practice Note for Professional Persons (ProPECC PN 2/93) “Noise from Construction Activities - Non-statutory Controls” and Technical Memorandum on Environmental Impact Assessment Process issued by HKSAR Environmental Protection Department [“EPD”] under the Environmental Impact Assessment Ordinance, Cap 499, S.16 are presented in Table 2.3.

Table 2.3 Action and Limit Levels for Noise per EM&A Manual

Time Period

Action

Limit (dB(A))

0700-1900 on normal weekdays

When one documented complaint is received from any one of the noise sensitive receivers

- 70 dB(A) for school and

- 65 dB(A) during examination period

Note: Limits specified in the GW-TM and IND-TM for construction and operation noise, respectively.

2.9. If exceedances were found during noise monitoring, the actions in accordance with the Event and Action Plan shall be carried out according to Appendix E.

Monitoring Results and Observations

2.10. Referring to EM&A Manual Section 4.1.2, the impact noise monitoring should be carried out when there are Contract-related construction activities undertaken within a radius of 300m from the monitoring stations. No monitoring station was located within a radius of 300m of the Contract site as shown in Figure 2.4, no impact noise monitoring was conducted in the reporting period.

Figure 2.4 Site Layout Plan with Noise Sensitive Receivers and Desalination Plant