Revision History

Rev.

Description of Modification

Date

First Issue for Comments

13/03/2023

Revised according to IEC and SOR’s comment

16/03/2023

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 36th 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 February to 28 February 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 no. 3

Chemical building

- Installation of louvre building services and mechanical equipment

- Applying interior wall outstanding paint

- Construction of Staircases

- Underground utility construction work

Main Electrical & Central Chiller Plant Building

- Construction of fuel tank room

- Installation metal and timber Doors

- Installation of chillers, building services, electrical switchboard

ActiDAFF

- Erection of glass block wall

- Underground utility construction work

- Laying of roof floor screed and tiles

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

Product Water Storage Tank Building

- Resin Injection Work & Water Test for 3 Water Tanks

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

- Installation of Underground utility construction, building services, mechanical equipment, and steel pipe

OSCG Building

- Installation of Design for Manufacturing and Assembly Panel

- Resin Injection work & water test for Brine Tank

- Underground utility construction work

- Construction of Staircase ST-1 & Construction of Partition Walls

- Installation of building services and mechanical equipment

Reverse Osmosis Building

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

- Construction of Staircase ST-6

- Underground utility construction

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

Post Treatment Building

- Installation of Louvres & Windows, roller shutter, building services, mechanical equipment and Glass Reinforced Plastics pipe

- Installation of Design for Manufacturing and Assembly Panels

- Underground utility construction

- Construction of External Wall

Inspection corridor

- Slab construction for segments 1‐7

- construction of stair tower No. 1 and 2

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

- Installation of door subframe

- Underground utility construction

- Staircases and internal finishing, puddle pipe installation, stop log wall construction

- Waterproofing works

- Installation of mechanical equipment and pipes, stoplogs, band screens, window, doors and louvers

Pump room

- internal finishing, waterproofing; E&M installation

Elevated Walkway

- Lift shaft construction

Other

- 132 kV temporary emergency vehicular access (eva) Construction

- Permanent road construction at Zone A, B, C

- Construction of parapet on top slab of backwash tank

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. Forty-four (44) 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, 4, 6, 8, 10, 13, 15, 17, 21, 23,25 and 28 February 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, 48 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, 15, 21 and 28 February 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 no. 3

Chemical building

- Installation of louvre building services and mechanical equipment

- Applying interior wall outstanding paint

- Construction of Staircases

- Underground utility construction work

Main Electrical & Central Chiller Plant Building

- Construction of fuel tank room

- Installation metal and timber Doors

- Installation of chillers, building services, electrical switchboard

ActiDAFF

- Erection of glass block wall

- Underground utility construction work

- Laying of roof floor screed and tiles

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

Product Water Storage Tank Building

- Resin Injection Work & Water Test for 3 Water Tanks

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

- Installation of Underground utility construction, building services, mechanical equipment, and steel pipe

OSCG Building

- Installation of Design for Manufacturing and Assembly Panel

- Resin Injection work & water test for Brine Tank

- Underground utility construction work

- Construction of Staircase ST-1 & Construction of Partition Walls

- Installation of building services and mechanical equipment

Reverse Osmosis Building

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

- Construction of Staircase ST-6

- Underground utility construction

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

Post Treatment Building

- Installation of Louvres & Windows, roller shutter, building services, mechanical equipment and Glass Reinforced Plastics pipe

- Installation of Design for Manufacturing and Assembly Panels

- Underground utility construction

- Construction of External Wall

Inspection corridor

- Slab construction for segments 1‐7

- construction of stair tower No. 1 and 2

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

- Installation of door subframe

- Underground utility construction

- Staircases and internal finishing, puddle pipe installation, stop log wall construction

- Waterproofing works

- Installation of mechanical equipment and pipes, stoplogs, band screens, window, doors and louvers

Pump room

- internal finishing, waterproofing; E&M installation

Elevated Walkway

- Lift shaft construction

Other

- 132 kV temporary emergency vehicular access (eva) Construction

- Permanent road construction at Zone A, B, C

- Construction of parapet on top slab of backwash tank

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 36th Monthly EM&A Report for the Contract which summarizes the key findings of the EM&A programme during the reporting period from 1 February to 28 February 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

Benny Lam

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 no. 3

Chemical building

- Installation of louvre building services and mechanical equipment

- Applying interior wall outstanding paint

- Construction of Staircases

- Underground utility construction work

Main Electrical & Central Chiller Plant Building

- Construction of fuel tank room

- Installation metal and timber Doors

- Installation of chillers, building services, electrical switchboard

ActiDAFF

- Erection of glass block wall

- Underground utility construction work

- Laying of roof floor screed and tiles

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

Product Water Storage Tank Building

- Resin Injection Work & Water Test for 3 Water Tanks

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

- Installation of Underground utility construction, building services, mechanical equipment, and steel pipe

OSCG Building

- Installation of Design for Manufacturing and Assembly Panel

- Resin Injection work & water test for Brine Tank

- Underground utility construction work

- Construction of Staircase ST-1 & Construction of Partition Walls

- Installation of building services and mechanical equipment

Reverse Osmosis Building

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

- Construction of Staircase ST-6

- Underground utility construction

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

Post Treatment Building

- Installation of Louvres & Windows, roller shutter, building services, mechanical equipment and Glass Reinforced Plastics pipe

- Installation of Design for Manufacturing and Assembly Panels

- Underground utility construction

- Construction of External Wall

Inspection corridor

- Slab construction for segments 1‐7

- construction of stair tower No. 1 and 2

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

- Installation of door subframe

- Underground utility construction

- Staircases and internal finishing, puddle pipe installation, stop log wall construction

- Waterproofing works

- Installation of mechanical equipment and pipes, stoplogs, band screens, window, doors and louvers

Pump room

- internal finishing, waterproofing; E&M installation

Elevated Walkway

- Lift shaft construction

Other

- 132 kV temporary emergency vehicular access (eva) Construction

- Permanent road construction at Zone A, B, C

- Construction of parapet on top slab of backwash tank

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	Valid	-

Permit/ Licences	Valid Period		Status	Remark
	From	To
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 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.