ENVIRONMENTAL PROTECTION DEPARTMENT

Development of Integrated Waste Management Facilities Phase 2(IPARK2)

Project Profile

March 2024

CONTENTS
1
1.1
1.2
1.3
1.4
1.5
1.6
2

BASIC INFORMATION............................................................................................................ 1
Project Title .................................................................................................................................... 1
Purpose and Nature of the Project.................................................................................................. 1
Name of Project Proponent ............................................................................................................ 2
Location and Scale of Project and History of Site ......................................................................... 2
Number and Types of Designated Projects to be Covered by the Project Profile ......................... 2
Name and Telephone Number of Contact Person(s) ..................................................................... 3
OUTLINE OF PLANNING AND IMPLEMENTATION PROGRAMME .......................... 3

2.1

Project Planning and Implementation ............................................................................................ 3

2.2

Project Programme ......................................................................................................................... 4

2.3

Interfacing with Other Projects ...................................................................................................... 4

3

POSSIBLE IMPACT ON THE ENVIRONMENT.................................................................. 4

3.1

General Description of the Project ................................................................................................. 4

3.2

Air Quality ..................................................................................................................................... 6

3.3

Noise .............................................................................................................................................. 7

3.4

Waste Management ........................................................................................................................ 7

3.5

Water Quality ................................................................................................................................. 8

3.6

Human Health ................................................................................................................................ 9

3.7

Terrestrial Ecology ......................................................................................................................... 9

3.8

Marine Ecology and Fisheries...................................................................................................... 10

3.9

Landscape and Visual .................................................................................................................. 10

3.10

Cultural Heritage .......................................................................................................................... 11

3.11

Landfill Gas Hazard ..................................................................................................................... 11

3.12

Hazard to Life .............................................................................................................................. 114

MAJOR ELEMENTS OF THE SURROUNDING ENVIRONMENT ................................ 11

4.1

General ......................................................................................................................................... 12

4.2

Potential Existing and Planned Environmental Sensitive Receivers ........................................... 125ENVIRONMENTAL PROTECTION MEASURES TO BE INCORPORATED IN THE
DESIGN AND ANY FURTHER ENVIRONMENTAL IMPLICATIONS ......................... 13

5.1

Air Quality ................................................................................................................................... 13

5.2

Noise ............................................................................................................................................ 14

5.3

Waste Management ...................................................................................................................... 14

5.4

Water Quality ............................................................................................................................... 15

5.5

Human Health .............................................................................................................................. 15

5.6

Ecology and Fisheries .................................................................................................................. 16

5.7

Landscape and Visual .................................................................................................................. 16

5.8

Cultural Heritage .......................................................................................................................... 16

5.9

Landfill Gas Hazard ..................................................................................................................... 16

5.10

Hazard to Life .............................................................................................................................. 166

USE OF PREVIOUSLY APPROVED EIA REPORTS ........................................................ 17

List of Table
Table 2.1 - Project Implementation Programme

List of Figures
Figure 1.1 – Location Plan
Figure 3.1 – Process Flow Diagram of Waste-to-Energy Facilities

Development of Integrated Waste Management Facilities Phase 2

1

BASIC INFORMATION

1.1

Project Title

Project Profile

1.1.1 Development of Integrated Waste Management Facilities Phase 2 (IPARK2) (hereinafter
named as “the Project”).

1.2

Purpose and Nature of the Project

Background1.2.1 The Government promulgated the “Waste Blueprint for Hong Kong 2035” (the Waste Blueprint)
in February 2021, advocating the vision of “Waste Reduction · Resources Circulation · Zero
Landfill”. The Waste Blueprint sets out targets for per capita municipal solid waste (MSW)
disposal and recovery rate, and the goal of developing adequate waste-to-energy (WtE)
facilities, with the aim to move away from the reliance on landfills for MSW disposal by 2035.
1.2.2 The Government also announced in October 2021 “Hong Kong’s Climate Action Plan 2050”(the Climate Action Plan), setting out the vision of "Zero-carbon Emissions · Liveable
City · Sustainable Development" and outlining four major decarbonisation strategies andmeasures, namely net-zero electricity generation, energy saving and green buildings, green
transport and waste reduction, for achieving carbon neutrality.
1.2.3 As set out in the Waste Blueprint and the Climate Action Plan, development of more advanced
waste-to-energy facilities is an important strategy to phase out landfilling for MSW disposal inorder to reduce carbon emissions and turn waste into electricity. To move away from thereliance on landfills for MSW disposal by around 2035 and to achieve carbon neutrality in
waste management before 2050, the Government is not only committed to promoting waste
reduction and various means of recycling, but also developing sufficient WtE facilities with aview to transforming unavoidable and non-recyclable MSW into resources comprehensively.
1.2.4 The Integrated Waste Management Facilities Phase 1, IPARK1, which is now being built near
Shek Kwu Chau, will be the first WtE facility that adopts advanced incineration technology totreat MSW in Hong Kong. IPARK1 is targeted for commissioning in 2025 with a treatment
capacity of 3 000 tonnes of MSW daily. When planning for the development of IPARK1, anin-depth study had been carried out for the middle ash lagoon at Tsang Tsui in Tuen Mun as
one of the potential sites for consideration. Given that Hong Kong needs to build more WtE
facilities to achieve the goal of moving away from the reliance on landfills for MSW disposal
by around 2035, investigation and Environmental Impact Assessment (EIA) studies will be
carried out for the development of IPARK2 at the Tsang Tsui site.

1

Development of Integrated Waste Management Facilities Phase 2

Project Profile

Purpose and Nature
1.2.5 The Project comprises the construction and operation of the IPARK2 which will have a design
treatment capacity sufficient to handle around 6 000 tonnes per day (tpd) of MSW.
1.2.6 This Project will adopt state-of-the-art incineration technology to substantially reduce the bulk
size of waste. The energy from waste incineration will be recovered for electricity generation.
Apart from meeting the electricity demand of the facility, the surplus electricity from the Projectwill be exported to the public power grid, thereby boosting up the portion of electricity
generation from WtE source. Moreover, appropriate community amenities will be integrated
into the Project for public enjoyment.

1.3

Name of Project Proponent

1.3.1 The Waste Infrastructure Division of Environmental Protection Department (EPD), theGovernment of the Hong Kong Special Administrative Region.

1.4

Location and Scale of Project and History of Site

1.4.1 The Project site is located at the middle ash lagoon at Tsang Tsui, Tuen Mun. The middle ash
lagoon, along with the east and west ash lagoons, was constructed in the 1980s and leased to
the Castle Peak Power Company Limited (CAPCO) for storage of pulverised fuel ash (PFA).
The middle ash lagoon was surrendered to the Government in 2015. The Project site iscurrently a works area for decommissioning works under the Environmental Permit No.: FEP01/618/2022 which mainly involved site clearance and covering the levelled PFA surface by atleast 1m thick general fill. The Project site, which occupies an area of approximately 18
hectares (ha) of the middle ash lagoon, and most of the areas within the 500m study area islargely disturbed by human activities. The existing artificial seawall to the north of the Projectsite with an area of approximately 2 ha will be modified for construction of berthing facility tosupport operation of IPARK2 (see Figure 1.1).

1.5

Number and Types of Designated Projects to be Covered by the Project Profile

1.5.1 The Project involves the construction and operation of the IPARK2. The following elementsof the Project are classified as Designated Projects (DP) under the Environmental Impact
Assessment Ordinance (EIAO), Cap.499:An incinerator with an installed capacity of more than 500 tonnes per day (under item G.3
of Part I, Schedule 2 of the EIAO);
A waste disposal facility with an installed capacity of more than 500 tonnes per day for the
disposal of (a) refuse (under item G.4(a) of Part I, Schedule 2 of the EIAO); andA waste disposal facility for pulverised fuel ash, furnace bottom ash or gypsum (under item2

Development of Integrated Waste Management Facilities Phase 2

Project Profile

G.6 of Part I, Schedule 2 of the EIAO).
1.5.2 The above lists of DP items will be re-visited during the EIA study, taking into account thefindings of the investigation study to be conducted concurrently with the EIA study.

1.6

Name and Telephone Number of Contact Person(s)Name:Position:
Address:
Telephone:
Fax:
Email:
Name:
Position:
Address:
Telephone:
Fax:
Email:

Mr. Kiu-chung TSE
Senior Environmental Protection Officer
Rm. 1401‐02, 14/F, Chinachem Exchange Square, 1 Hoi Wan Street,
Quarry Bay, Hong Kong3543 1639
3529 2991
kiuchungtse@epd.gov.hk
Dr. Vivien BAO
Environmental Protection Officer
Rm. 1401‐02, 14/F, Chinachem Exchange Square, 1 Hoi Wan Street,
Quarry Bay, Hong Kong3543 1609
3529 2991
vivienwwbao@epd.gov.hk

2

OUTLINE OF PLANNING AND IMPLEMENTATION PROGRAMME

2.1

Project Planning and Implementation

2.1.1 The Project Proponent will employ consultancy firms to conduct the investigation and EIA
studies. Subject to the findings of the investigation study, the Project is intended to be
procured under a Design‐Build‐Operate (DBO) contract. The Contractor will be selected
through a competitive tendering exercise. Under the contract, the Contractor will be
responsible for:i) detailed design for the formation of the Project site and all facilities of the Project;ii) construction works for the forming of the Project site;iii) construction, provision and installation of all the facilities;iv) testing and commissioning of all the facilities;v) operation and maintenance of all the facilities; andvi) monitoring of operation.
3

Development of Integrated Waste Management Facilities Phase 2

2.2

Project Profile

Project Programme

2.2.1 The tentative Project implementation programme is shown in Table 2.1 below.
Table 2.1 – Project Implementation Programme
Activity Description
Appointment of Consultants
Investigation and EIA Studies/

Indicative Milestones

Commencement

2022

Completion of Investigation and EIA Studies

2024

Tendering for the Contract2025

Commencement of Design and Construction of the Project2026

Commencement of the Operation of the Project

2.3

of

Early 2030s

Interfacing with Other Projects

2.3.1 The Project is located in the remaining portion of the middle ash lagoon and potential major
projects that would have interface with the Project have been identified and are listed belowi)
ii)
iii)
iv)
v)
vi)

West New Territories (WENT) Landfill;
TPARK (Sludge Treatment Facility);
Tsang Tsui Columbarium and Garden of Remembrance;
WENT Landfill Extension;
Proposed Nim Wan Road (South); andProposed upgrading of Nim Wan Road (North) and Deep Bay Road.

2.3.2 The above list will be re-visited during the EIA study to ensure all relevant projects areincorporated. Any cumulative impacts arising from these projects during the construction andoperation phases of the Project would be identified and addressed as appropriate.

3

POSSIBLE IMPACT ON THE ENVIRONMENT

3.1

General Description of the Project3.1.1 The IPARK2 will comprise the following key components, which would be installed inside
enclosed buildings. An indicative schematic flow diagram of waste-to-energy facilities isshown in Figure 3.1:


Waste reception, storage and feeding system;
Incineration system;
4

Development of Integrated Waste Management Facilities Phase 2








Project Profile

Waste heat recovery, turbine generator and cooling system;
Electricity export system;
Flue gas treatment and emission system;
Reagent reception and storage system;
Incinerator bottom ash, fly-ash and flue gas cleaning residues storage, handling andtreatment system; andProcess control and monitoring system.

3.1.2 Subject to the findings of the investigation study, the following ancillary facilities may be
included to support the operation of the IPARK2:
















Berthing facility;
Weighbridge;
Fuel storage tanks;
Wastewater treatment and recycling system;
Water supply system;
Drainage and sewerage system;
Odour control system;
Utilities provision;
Vehicle and container washing facilities;
Refuse container storage facilities;
Maintenance workshops;
Administration building;Community facilities;
Decarbonisation system/Carbon capture/utilisation/storage system;
Enhanced treatment facility(ies) for ash/residues and;
Security system.

Construction Phase
3.1.3 The Project will involve the formation of land and the associated roads, drains and otheressential utilities, followed by foundation works, construction of buildings and installation ofplants and equipment for the various systems as mentioned in paragraphs 3.1.1 to 3.1.2 above.
3.1.4 Modification of the existing artificial seawall to the north of the Project site will be required
for the construction of berthing facility for loading and unloading of waste, incineration ashes
and recycled products by marine vessels. Subject to the findings of the investigation study,
non-dredged method will be considered for construction of the berthing facility.
3.1.5 Regarding utilities, it is envisaged that trench excavation and filling on land outside the Projectsite would be carried out for connection of electricity cable, potable water supplies,
5Development of Integrated Waste Management Facilities Phase 2

Project Profile

telecommunication cables and other provisions to support the operation of the IPARK2.
Operation Phase
3.1.6 The Project will receive and handle MSW as its normal feed stock.
3.1.7 The major source of waste will be transported in containers to the Project site via marine access.
It will also receive via road access a smaller portion of waste from nearby districts; the waste
will mostly be transported by refuse collection vehicles or container trucks.
3.1.8 Waste delivered to the Project site will be unloaded to the storage bunker, from which it will be
conveyed to the high temperature incineration system for combustion. Ashes remaining will
be collected at the bottom of the incineration system for enhanced treatment for beneficial use.
3.1.9 The hot flue gases from the combustion chamber of the incineration system will pass throughthe waste heat boiler system for energy recovery. The thermal energy so recovered willtransform water into steam in the boiler system which will be used to drive the steam turbine
for electricity generation. The cooled flue gases will be treated by advanced flue gas treatment
system to meet the stringent regulatory control limits before releasing to the atmosphere via thestack. The fly ash and flue gas cleaning residues collected from the boiler and the flue gas
cleaning system are hazardous materials and they would be explored for enhanced treatment
into recycled products for reuse or solidified with cement / stabilised with chemicals for final
disposal as last resort.
3.1.10 Subject to the findings of the investigation study and space availability of the Project site, theProject may also receive incinerator bottom ash, fly ash and flue gas cleaning residues fromIPARK1 for enhanced treatment for beneficial use.

3.2

Air Quality

Construction Phase
3.2.1 The main potential air quality impacts would be (a) dust emission associated with site formationand construction activities; and (b) gaseous pollutants due to the operation of diesel-powered
construction equipment. Dust emission from a construction site is controlled under the Air
Pollution Control (Construction Dust) Regulation, which sets out effective construction dust
control requirements including but not limited to covering the dusty materials and keeping
ground surface wet by water spraying to suppress the release of construction dust. These
impacts will be qualitatively assessed in the EIA study.
Operation Phase
3.2.2 Flue gas emission from the incineration system would be the major source of potential air
6

Development of Integrated Waste Management Facilities Phase 2

Project Profile

quality impact in the operation phase.
Detailed air quality impact assessment would be
required to predict the concentrations of air pollutants at the air sensitive receivers (ASRs) andto assess compliance with the Air Quality Objectives (AQOs) and the relevant air quality
criteria for non-AQO pollutants. The assessment would include cumulative impacts of stackemissions from the Project, emission from ash/residues management system, marine andvehicular emission from transportation and existing and planned emission sources nearby, suchas the Black Point Power Station and Castle Peak Power Stations, TPARK, the WENT Landfill,
and the WENT Landfill Extension.
3.2.3 Fugitive emission and odour nuisance may arise from the transportation of waste, operation of
on-site wastewater treatment and recycling system, waste reception and storage system andash/residues handling and treatment system as well as the enhanced treatment facility(ies) for
ash/residues. Assessment of fugitive emission and odour impact is required.

3.3

Noise

Construction Phase
3.3.1 Noise would be generated from construction activities through the use of powered construction
plant and equipment. Having considered the remote location of the Project site and upon
introduction of appropriate mitigation measures, there is unlikely to be any significant
construction noise impacts associated with the Project.
Operation Phase
3.3.2 The facilities will operate 24 hours a day and the waste reception is expected to be around 12
hours a day mostly during daytime under normal operation. The key potential noise sources
during the operation phase will include those from waste reception facilities and operation ofprocess equipment. Operation noise may also arise during container handling by cranes at theberthing facility. The potential noise impact and the need for mitigation measures will beassessed in the EIA study.
3.3.3 Majority of waste would be containerised and delivered to the berthing facility of the Projectsite by marine transport. Hence, it is expected that the waste delivery arrangements would
not significantly increase waste collection vehicles traffic. A relatively small portion of thewaste will come from nearby districts direct through land transportation. Subject to thefindings of the investigation study and space availability of the Project site, ashes / residues
from IPARK1 may also be delivered to the Project via the berthing facility. Potential traffic
noise impact arising from marine traffic, on-site and off-site vehicle movements of the Projectwill be assessed in the EIA study as appropriate.

3.4

Waste Management
7

Development of Integrated Waste Management Facilities Phase 2

Project Profile

Construction Phase
3.4.1 The types of waste that would be generated during the construction phase of the Project include
construction and demolition (C&D) materials from the construction activities, general refuse
from the workforce and chemical wastes from the construction plant and equipment.
3.4.2 Subject to the findings of the investigation study, non-dredged method will be considered forconstruction of the berthing facility. The potential waste management implications will beassessed and appropriate mitigation measures proposed to minimise the impact in the EIA study
as appropriate.
3.4.3 Based on available information, the middle ash lagoon have been used solely for PFA disposal
since its formation and potential land contamination associated with previous uses is therefore
not anticipated.
Operation Phase
3.4.4 The major waste arising during the operation phase of the Project would be incinerator bottom
ash, fly ash and flue gas cleaning residues generated from the incineration process.
3.4.5 The Project may sort out non-combustible waste or inert materials that are not suitable forincineration. The amount of such waste is expected to be small and would be disposed of atlandfills. The operation of the Project will also generate general refuse from the workforce
and a relatively small amount of chemical waste such as waste lubricating oil and used batteries.
3.4.6 While small amount of chemical waste will be produced during the construction phase andoperation phase of the Project, it is envisaged that by adopting good practices and appropriate
preventive measures, the Project will not give rise to any potential land contamination issue.
3.4.7 Similar to the current operation associated with the WENT Landfill, minor maintenancedredging of the existing navigation channel to facilitate navigation of waste delivery vessels toand from the berthing facility may be required on an as-needed basis occasionally subject tothe seabed level of the existing navigation channel. The requirements under the Dumping at
Sea Ordinance (Cap. 466) will be followed prior to marine disposal of dredged sediment.

3.5

Water Quality

Construction Phase
3.5.1 The potential sources of water quality impact of the Project consist of site runoff and drainage,
debris, refuse and liquid spillages from general construction activities; and sewage effluent
from the construction workforce.

8

Development of Integrated Waste Management Facilities Phase 2

Project Profile

3.5.2 The marine works, may potentially cause disturbance and re-suspension of marine sediments.
The water quality impacts on the nearby water sensitive receivers and Production Area of
Oyster will be evaluated and appropriate mitigation measures proposed to minimise the impacts
in the EIA study as appropriate.
Operation Phase
3.5.3 The Project is located within the Deep Bay Water Control Zone. Wastewater generated fromthe operation of the Project such as sewage from the workforce and floor / vehicle washingwould be treated by on-site wastewater treatment plant for reuse (not for use by the generalpublic) without any effluent discharge. Subject to the findings of the investigation study,
once-through seawater cooling system will be considered and the potential environmental
impacts associated with discharge of spent seawater into nearby water body will be evaluatedin the EIA study.
3.5.4 The Project will explore various options for providing potable and process water in theinvestigation study. If an on-site desalination facility is required for the Project, there will bedischarge of concentrated brine at a relative low volume.

3.6

Human Health

Construction Phase
3.6.1 The Project site is primarily formed by PFA. Excavation of PFA may be required under the
Project and the excavated PFA will be reused for backfilling on-site so that no off-site disposalof PFA will be required. The public health risk associated with radon emissions due to PFA
would be negligible.
Operation Phase
3.6.2 Potential health impacts may arise from the following sources during the operation phase of
the Project and they will be evaluated in the EIA study:
 Aerial emissions from the stack; and Fugitive emissions during transportation, storage and handling of the waste and incinerator
bottom ash/fly ash/flue gas cleaning residues that may contain toxic pollutants.
3.6.3 Emergency response plan will be formulated by the Contractor to handle potential accidental
events such as fire, explosion or failure of the air pollution control system to minimise thepotential public health risk.

3.7

Terrestrial Ecology
Construction and Operation Phases9Development of Integrated Waste Management Facilities Phase 2

Project Profile

3.7.1 As stated in paragraph 1.4.1 above, the Project site is currently a works area fordecommissioning works under the Environmental Permit No.: FEP-01/618/2022. Subject tothe findings of the ecological impact assessment in the EIA study, the impact of direct habitat
loss arising from the Project would likely be negligible. Indirect impacts such as noise,wastewater and human disturbance arise from construction and operation of the Project will be
evaluated. Mitigation measures would be proposed as appropriate to minimise potential
impacts to the surrounding habitats and associated fauna.

3.8

Marine Ecology and Fisheries

Construction Phase
3.8.1 The major direct impacts associated with the Project would be the potential loss of aquatic
habitats due to construction of the berthing facility. The marine works would have a potential
impact on the marine water quality affecting the nearby marine ecology and fisheries sensitive
receivers. It will be evaluated in the EIA study.
Operation Phase
3.8.2 Surface runoff and discharge from the facility may arise during the operation phase of the
Project. Marine vessel traffic mainly from waste delivery, though limited, may cause indirect
disturbance to aquatic wildlife. With proper implementation of control and mitigation
measures on wastewater discharge, it is envisaged that any adverse impacts on marine ecology
and fisheries sensitive receivers would be contained by following the regulatory requirementsof the Water Pollution Control Ordinance, Cap. 358. All potential impacts to marine ecology
and fisheries sensitive receivers will be addressed in more detail in the EIA study.

3.9

Landscape and Visual

Construction Phase
3.9.1 As stated in paragraph 1.4.1 above, the Project site is currently a works area fordecommissioning works under the Environmental Permit No.: FEP-01/618/2022. Removal oftrees and vegetation is not required under the Project.
Operation Phase
3.9.2 The buildings, stack or any above-ground structures of IPARK2 may induce visual impacts tothe surroundings. As the Project site is located in an industrial setting with low landscapevalue and Visual Sensitive Receivers (VSRs) are limited to a few distant villages like Ha Pak
Nai and Lung Kwu Sheung Tan, it is expected that with the implementation of appropriatearchitectural design and other measures such as landscape planting, the residual landscape andvisual impacts would be acceptable.

10Development of Integrated Waste Management Facilities Phase 2

3.10

Project Profile

Cultural Heritage

3.10.1 There is no site of cultural heritage, i.e. all declared monuments, proposed monuments, gradedhistoric sites/buildings and Government historic sites within or in the vicinity of the Projectsite. The Project site does not encroach on the Tsang Tsui Site of Archaeological Interest,
which is located about 100m South-West from the Project site. Cultural heritage impact is not
anticipated.

3.11

Landfill Gas Hazard

Construction Phase
3.11.1 The Project site falls within the 250m consultation zone of the WENT Landfill Extension.
The potential sensitive receivers to landfill gas hazard are the workers in the construction sites
and the construction works will mainly be carried out in an outdoor environment.
Operation Phase
3.11.2 The potential sensitive receivers are the operation and maintenance staff and visitors ofcommunity facilities.
3.11.3 Landfill gas hazard assessment associated with landfill gas migration from the WENT Landfill
Extension to the Project site will be carried out under the EIA study. With the implementationof appropriate mitigation measures, adverse impact of landfill gas hazard during construction
and operation phase is not anticipated.

3.12

Hazard to Life

Construction Phase
3.12.1 The Project site is not located within consultation zone of any Potentially Hazardous
Installations. The Landfill Gas Power Generation Project at the WENT Landfill is locatedmore than 500 m away from the boundary of the Project site. The Project will not involve
any blasting works and use of explosives is not expected.
Operation Phase
3.12.2 Fuel oils will be used for auxiliary burners during any start-up and shutdown of the incineration
operation. The Project is not expected to introduce any plant and equipment that areclassifiable as Potentially Hazardous Installation, and potential hazard to life from its operation
is not anticipated.

4

MAJOR ELEMENTS OF THE SURROUNDING ENVIRONMENT

11

Development of Integrated Waste Management Facilities Phase 2

4.1

Project Profile

General4.1.1 The Project site is located at the middle ash lagoon, Tsang Tsui, Tuen Mun. The west portionof the middle ash lagoon has been developed as the Tsang Tsui Columbarium and Garden of
Remembrance and this Project occupies the remaining portion of the middle ash lagoon, withan area of approximately 18 ha. Other industrial facilities in the area include the Black Point
Power Station owned and operated by CAPCO to the southwest, the TPARK located on theeast ash lagoon, the WENT Landfill to the further east and the WENT Landfill Extension
Project to the south side of the Project site.
4.1.2 The west ash lagoon, located to the west of the Tsang Tsui Columbarium, was constructed andoperated before the EIAO came into effect on 1 April 1998, so the original operation of CAPCO
at the ash lagoon, including covering the ash surface with fill materials during the operation of
the ash lagoon, was exempted from the EIAO. EPD has been taking appropriate
environmental precautionary measures since mid-December 2023, such as covering the ash
surface with fill materials, to prevent the ash deposited in the ash lagoon from causing potential
environmental impacts. When the development or redevelopment of the west ash lagoon site
is confirmed in the future, and if the project development is a designated project, project
proponents will be required to carry out the statutory EIA process for the construction andoperation of the designated project in accordance with the requirement of the EIAO and its
Technical Memorandum, which include application of environmental permit, and implement
environmental mitigation measures according to the relevant requirements.

4.2

Potential Existing and Planned Environmental Sensitive Receivers

4.2.1 The existing environment of the Project site and its surrounding were reviewed and the potential
sensitive receivers identified in the following paragraphs. They are by no means exhaustive
and will be reviewed in more detail during the EIA study.
4.2.2 The nearby potential environmental sensitive receivers include office of the Tsang Tsui
Columbarium and Garden of Remembrance, office of the TPARK and site offices of the WENT
Landfill and the WENT Landfill Extension. The nearest residential use is about 1.5 km fromthe Project site at Ha Pak Nai.
4.2.3 The Project site is situated at the mouth of the Deep Bay within the Deep Bay Water Control
Zone. Two moderate sized streams are located at the southern part of ash lagoon anddischarged into a tidal channel to the east of the ash lagoon area. A seawater intake of TPARK
is located at about 300 m to the east of the Project site.

12

Development of Integrated Waste Management Facilities Phase 2

Project Profile

4.2.4 An Area of Oyster Production 1 at Deep Bay is located at around 2.5 km away from the Projectsite. A Mariculture Subzone is delineated in the Deep Bay Water Control Zone under the
Water Pollution Control Ordinance in order to protect the oyster beds which is about 1.6 km
away from the Project site.
4.2.5 The Project site is located in an industrial setting and surrounded by various industrial
developments. Other land uses such as construction sites, wasteland, plantation, secondary
woodland, shrubland and stream courses, etc. are identified within 500 m assessment area of
the Project site. Bird species of conservation concerns such as Little Egret, Chinese Pond
Heron and Kentish Plover were recorded in the area under previous studies while no fireflies
were recorded in the area based on previous survey findings.

5

ENVIRONMENTAL PROTECTION MEASURES TO BE INCORPORATED IN THE
DESIGN AND ANY FURTHER ENVIRONMENTAL IMPLICATIONS

5.1

Air Quality

Construction Phase
5.1.1 Good site practices, dust control and suppression measures will be implemented to minimise
potential dust impacts. Reference would be made to the requirements stipulated in the Air
Pollution Control (Construction Dust) Regulation.
Operation Phase
5.1.2 The design and emission limits of the incineration system will make reference to the standards
for pollution control on the MSW incineration in the Mainland China (GB 18485-2014) and
Shenzhen (SZDB/Z 233-2017), the best available techniques (BAT) reference document for
waste incineration in the European Union (EU), as well as the prevailing guidance note on thebest practicable means (BPM) for incinerators (municipal waste incineration) in Hong Kong.
Combustion process controls will be specified in the design requirements so as to achieve afurnace combustion zone operating at no less than 850˚C with a residence time of at least 2
seconds for effective destruction of organic pollutants. Advanced air pollution control systemand flue gas monitoring system will be proposed to ensure compliance with the criteria forevaluating air quality impact.
5.1.3 Facilities that have the potential to cause fugitive emission or odour nuisance including thewaste reception hall will be enclosed and operated under negative pressure to prevent odour

1

The Area of Oyster Production is identified in AFCD’s website(https://www.afcd.gov.hk/english/fisheries/fish_aqu/fish_aqu_mpo/fish_aqu_mpo.html) as well as in EPD’s annual marine
water quality reports (https://www.epd.gov.hk/epd/english/environmentinhk/water/hkwqrc/waterquality/marine-2.html)

13

Development of Integrated Waste Management Facilities Phase 2

leaking to the outdoor environment.
treated by combustion directly.

5.2

Project Profile

Odorous air will be fed to the incineration system andNoiseConstruction Phase
5.2.1 Mitigation measures including temporary noise barriers, quiet construction plant andscheduling of works will be recommended, where necessary.
Operation Phase
5.2.2 Majority of the waste treatment processes are expected to be undertaken in enclosed structures
to avoid any potential adverse noise impacts. Location of fixed plant at the berthing facility
will be carefully reviewed and mitigation measures such as barriers and restriction on plant
usage will be considered as appropriate. Appropriate mitigation measures will be considered
to minimise the potential noise generated from operation-related traffic if required.

5.3

Waste Management

Construction Phase
5.3.1 Consideration will be taken during the design phase to minimise the generation of all kinds of
C&D materials, including PFA and recover inert materials for reuse. The Contractor will be
required to develop a Waste Management Plan prior to the commencement of construction
works.
Apart from good site practice, waste reduction measures and provisions toreuse/recycle materials would have to be implemented. The various types of waste produced
would be handled, transported and disposed of using approved methods in compliance withstatutory requirements.
5.3.2 Subject to the findings of the investigation study, non-dredged method will be considered forconstruction of the berthing facility.
Operation Phase
5.3.3 Incinerator bottom ash would be treated into recycled products for reuse to maximise resource
recovery and avoid landfill disposal. Fly ash and flue gas cleaning residues which arehazardous materials would be explored for enhanced treatment into recycled products as far aspracticable and relevant plant and equipment for such purpose may be installed in the operation
phase of the Project. As a last resort, the fly ash and flue gas cleaning residues would be
solidified with cement or stabilised with chemicals for disposal at landfill. These solidified /stabilised end products would be tested in accordance with the requirements of the proposed
Incineration Residue Pollution Control Limits 2 prior to landfill disposal.
2

The proposed Incineration Residue Pollution Control Limits will make reference to those adopted for IPARK1.

14

Development of Integrated Waste Management Facilities Phase 2

Project Profile

5.3.4 Chemical waste would be properly handled and disposed of in accordance with the Waste
Disposal (Chemical Waste) (General) Regulation. Recycle bins for general refuse will beplaced in the Project site.

5.4

Water Quality

Construction Phase
5.4.1 The water quality impacts due to marine works associated with construction of the berthingfacility would be evaluated. Appropriate mitigation measures such as provision of silt
curtains would be identified and implemented to ensure acceptable residual water quality
impact.
5.4.2 For land-based activities, the construction activities in the Project may include excavation,
earthworks and/or building works. Necessary silt removal facilities will be provided toremove any silt before the discharge of site runoff. The design of temporary on-site drainage
and silt removal facilities will comply with the guidelines stipulated in EPD’s Practice Note forProfessional Persons, Construction Site Drainage (ProPECC PN 2/23). With proper sitemanagement and implementation of control and mitigation measures, adverse impacts on water
quality would not be expected.
Operation Phase
5.4.3 All wastewater generated from the Project will be treated at the on-site wastewater treatment
plant for cleansing and landscape irrigation reuses (not for use by the general public) without
any effluent discharge. Subject to the findings of the investigation study, once-throughseawater cooling system will be considered and the potential environmental impacts associatedwith discharge of spent seawater into nearby water body will be evaluated in the EIA study.
5.4.4 If on-site desalination facility is required for the Project, the small volume of concentrated
saline effluent from the facility will be properly discharged.

5.5

Human Health5.5.1 Appropriate safeguards and risk control measures will be identified and implemented as
appropriate.
5.5.2 Measures to prevent radon influx from the PFA to the Project buildings will be considered andimplemented as appropriate. Sufficient ventilation will be provided and regular maintenancewill be conducted to avoid accumulation of radon.

15

Development of Integrated Waste Management Facilities Phase 2

5.6

Project Profile

Ecology and Fisheries

5.6.1 The mitigation measures that are to be implemented to address the impacts on air, noise, waste
and water quality will help to alleviate any potential ecological and fisheries impacts. Proper
design, e.g. appropriate design to avoid light spill over nearby sensitive areas, will also be
applied to avoid sensitive parts of the natural environment as far as practicable. Nevertheless,the ecological and fisheries impacts will be assessed and the need of any mitigation measures
will be identified in the EIA study.
5.6.2 Impact of the Project on marine ecology and fisheries will be minimised via appropriate
measures that mitigate water quality impacts which are depicted in paragraphs 5.4.1 – 5.4.4
above.

5.7

Landscape and Visual

Construction Phase
5.7.1 Appropriate mitigation measures such as landscape planting and good site practices will beidentified and implemented as appropriate. The natural environmental features of the areaadjoining and in the vicinity of the Project site will be restored if disturbed during construction.
Operation Phase
5.7.2 The landscape and visual impacts of the architectural and landscape designs of the Project will
be assessed. Landscape proposal and aesthetic architectural design will be included such that
the Project would blend in with the surrounding landscape as much as possible.

5.8

Cultural Heritage

5.8.1 There is no site of cultural heritage within or in the vicinity of the Project site. Hence, cultural
heritage impact is not anticipated and specific mitigation measure is considered not required.

5.9

Landfill Gas Hazard

5.9.1 It is understood that the WENT Landfill Extension will be designed as a containment landfill
with active landfill gas collection system installed to extract landfill gas and eliminate its offsite migration. Site safety measures, routine monitoring of landfill gas at excavation areas andinstallation of building protection measures will be proposed as appropriate.

5.10

Hazard to Life

5.10.1 Potential hazard to life is not anticipated and specific mitigation measure is considered not
required.
16

Development of Integrated Waste Management Facilities Phase 2

6

Project Profile

USE OF PREVIOUSLY APPROVED EIA REPORTS

6.1.1 AEIAR-163/2012 - Development of the Integrated Waste Management Facilities Phase 1 - The
EIA study was conducted for development of the IWMF with a design capacity of 3 000 tpd at
two potential sites, namely the artificial island near Shek Kwu Chau and the northern portionof the middle ash lagoon at Tsang Tsui, Tuen Mun. The results of the EIA study indicated thatdeveloping the IWMF with a design capacity of 3,000 tpd at either or both of the above twosites will be environmentally acceptable, provided that advanced technologies are installed andappropriate mitigation measures are implemented. The EIA report was approved on 17
January 2012.
6.1.2 Reference may also be made within the study area from the following reports:







PP-649/2022 – Project Profile for Decommissioning of Remaining Portion of Middle Ash
Lagoon in Tsang Tsui, permission to apply directly for an environmental permit granted on
3 October 2022;
AEIAR-186/2015 - Decommissioning of West Portion of The Middle Ash Lagoon at Tsang
Tsui, Tuen Mun, approved on 28 January 2015;
AEIAR-147/2009 - West New Territories (WENT) Landfill Extensions, approved on 20
November 2009; andAEIAR-129/2009 – Sludge Treatment Facilities (TPARK), approved on 19 February
2009

17

(under EP-393/2010A)

Proposed IWMF Phase 2(IPARK2)Tsang Tsui
Columbarium and
Garden of
Remembrance

TPARKWest Ash Lagoon
WENT Landfill

WENT Landfill Extension

Development of Integrated Waste Management Facilities
Phase 2 (IPARK2) –Location Plan

Figure 1.1

Environmental
Protection
Department

風冷式/水冷式冷凝器
Air / Water Cooled
Condenser

回收或堆填
Recycling or Landfilling

Note: The process flow diagram is indicative only. The cooling system and flue gas cleaningsystem will be subject to the findings of the investigation and EIA study and detailed design.

Development of Integrated Waste Management Facilities
Phase 2 (IPARK2) –Process Flow Diagram of Waste-to-Energy Facilities

Figure 3.1

Environmental
Protection
Department