The Central Police Station (CPS) (including the three declared monuments: Central Police Station, Former Central Magistracy and Victoria Prison Compound) was first established in 1841 when the British Royal Navy took possession of Hong Kong Island. The Site was selected as the centre for law and order, with the police station, magistracy and jail located close together. The CPS functioned as Police Headquarters on a regional and district level until 2006 when they were closed or relocated, and has since been closed to the public.

The Chief Executive (CE)’s 2007-2008 Policy Address highlighted revitalization as the guiding principle of heritage conservation and the Project was among one of the specific proposals put forward by the CE in the same Policy Address. At the meeting of the Executive Council (ExCo) on 15 July 2008, the ExCo advised and the CE ordered that Government should enter into a partnership with the HKJC in the form of an agreement (or agreements) to take forward the conservation and revitalization of the CPS (hereafter “the Project”) based on various guiding parameters. The Project is now being undertaken in partnership with the Development Bureau of the HKSAR Government. The HKJC has taken on board the decision at the ExCo meeting and further investigated the design and implementation of the Project.

ERM-Hong Kong Ltd (ERM) has been commissioned by the Jockey Club CPS Limited (“the CPS Ltd”) to undertake the Environmental Impact Assessment (EIA) Study in accordance with the EIA Study Brief (No. ESB-205/2009) issued under the Environmental Impact Assessment Ordinance (EIAO). The cultural heritage impact assessment was prepared by the conservation architect Purcell Miller Tritton LLP. This Executive Summary summarizes the key findings of the EIA.

1.2 Need For the Project

The conservation and revitalization of the CPS was among one of the specific proposals put forward in the CE’s 2007-2008 Policy Address, which highlights revitalization as the guiding principle of heritage conservation. The vision of the Project embraces three major principles:

1. Heritage:

· to set the Hong Kong benchmark for excellence in the restoration, revitalisation and adaptive reuse of historic structures; and

· to be the focal attraction in the Government’s Conserving Central project.

2. Visual Arts:

· to establish an international reputation for organising art exhibitions;

· to attract a high quality cluster of arts organisations;

· to create a programme and arts facility that will appeal to a wide cross section of the people of Hong Kong;

· to complement the visual arts with a lively and varied performing arts schedule;

· to provide an international platform for Hong Kong and Pearl River Delta creative talent;

· to attract international talent to Hong Kong through exhibitions and artists’ residency programmes; and

· to provide a practical training base for Hong Kong and China based arts professionals.

3. History:

· to provide a unique and informative interpretative experience;

· to relay the history and stories of the Site to students, local visitors and tourists; and

· to explain the role of law and order in the context of Hong Kong’s development.

The Project aims to transform a cluster of Declared Monuments into a thriving cultural and historic centre which is financially supported by suitably compatible commercial activities.

1.3 Objectives of the EIA Study

The Project is within a site of cultural heritage, and therefore is classified as a designated project under Item Q.1 in Schedule 2 of the EIAO and therefore the construction and operation of the Project will require an Environmental Permit.

The overall objectives of the EIA Study are to provide information on the nature and extent of environmental impacts arising from the construction and operation of the Project; to recommend appropriate mitigation measures to control the potential environmental impacts so that it complies with the requirements of the Technical Memorandum on Environmental Impact Assessment Process of Environmental impact Assessment Ordinance (EIAO-TM); and to confirm the environmental acceptability of the Project. Key environmental issues identified include cultural heritage, landscape and visual, air quality, noise, water quality and waste management.

The EIA was conducted in accordance with the guideline on assessment methodologies provided in the EIAO-TM. The general approach for the assessment includes description of baseline environmental conditions for the impact assessment, identification and evaluation of potential impacts and recommendation of mitigation measures and an environmental monitoring programme. The assessments in this EIA Study are conducted using well-proven and internationally accepted methods based on reasonable worst-case conditions.

2 Project Description

2.1 Existing Environment

The location of the Project Site is shown in Figure 2.1. It is bounded by Hollywood Road to the north, Arbuthnot Road to the east, Chancery Lane to the south and Old Bailey Street to the west. It comprises three Declared Monuments designated under the Antiquities and Monuments Ordinance in 1995. They are:

· Central Police Station;

· Former Central Magistracy; and

· Victoria Prison Compound.

Figure 2.2 shows the location of the Declared Monuments within CPS and the buildings of the Declared Monuments.

Without the Project, the CPS will remain closed to the public and the opportunity to provide a cultural and leisure space in the heart of Central will be forgone. Moreover, without immediate remedial works and long term maintenance, the condition of its historical buildings may deteriorate.

2.2 Consideration of Alternatives

2.2.1 Overall Design

To bring the CPS to life and in order to achieve the vision for revitalising the CPS as an arts hub in the centre of the city, a new medium sized exhibition space that can house international high value loans and similarly scaled multi-purpose space, complemented by supporting educational and commercial facilities will have to be provided.

Different design options have been identified and examined. The option of only utilising the existing buildings for adaptive use was initially examined. Larger spaces within existing buildings (the Old Gymnasium in the Police Headquarters; the two courtrooms in the Magistracy; some of the upper floor dormitory rooms in the Barrack Block) were considered for the multi-purpose space and for the art galleries, however these were all ruled out due to limited space availability, requirement of substantial intervention or for other difficulties.

The physical constraints of the spaces in the existing buildings make it impossible for the purpose built international quality exhibition and multipurpose spaces (for education/performance) are to be housed within the existing buildings. If this were to happen, parts of the interiors would have to be stripped out in order to provide the necessary security, climate and display conditions for high quality exhibitions. This approach would not require the construction of any new buildings and has been adopted by art museum developments in a number of heritage sites around the world. However, the interior heritage features would have to be demolished to provide the necessary facilities and environment for the new purpose with only the retention of the facades. This deviates from the CPS model to retain, conserve and adapt the interiors of the heritage buildings for suitable reuse. The CPS Ltd is mindful that there is a need to strike a balance to achieving both the “heritage” and “visual arts” aims in its vision of the Project and felt that limited new building was the best way of providing accommodation for international quality exhibitions and conferences/ events/ performance/ education space as well as for the necessary machinery and plant to service the whole site. The modestly dimensioned new buildings will enrich the CPS immeasurably by providing added flexibility, function and cultural use to the site while preserving the existing heritage buildings and making them accessible to the public. This is in line with many other examples of heritage buildings worldwide that have been converted for modern/contemporary visual arts use but that need new buildings added to them to adequately fulfil their role.

In 2008, a Conservation Management Plan (CMP) ([1]) for the CPS was prepared, which identified only two potential sites where new buildings could be inserted. These sites were on the west side of the Prison Yard where the General Office is located (consisting of some modern single storey office buildings, some small brick single storey stores and the modern single story asbestos roofed extension on the west end of ‘D’ Hall) and the east side of the Prison Yard (consisting of the Laundry Yard, the single storey work shed and adjacent lavatories) (see Figure 2.2). Both these sites have very limited heritage value. In fact, the benefit to the rest of the Site in replacing them with modern purpose built new facilities far outweighs the benefits of any possible adaptive re-use.

Therefore, the conclusion was reached that in order to provide museum-quality exhibition space and a flexible venue for performances/ concerts/ lectures and events at the CPS, and minimising intervention in the existing historic buildings by housing the cooling plant at a new centralised location, as well as to make it both culturally and financially viable, new buildings would be needed, potentially taking the footprint of the General Office and the Laundry Yard.

2.2.2 Design of the New Building

The height of the new buildings conforms to the imposed height limit of 80 mPD for any new buildings on the upper platform area in the Draft Sai Ying Pun and Sheung Wan Outline Zoning Plan (OZP) S/H3/24. The new buildings are intended to house facilities such as a gallery, multi-purpose space, as well as food and beverage (F&B) outlets. Two design schemes have been identified:

Scheme A: The F Hall is used for gallery space, gallery support and the new building to the north of F Hall contains gallery space and the supporting facilities, including part of the central plant rooms to provide chilled water to the whole site (see Figure 2.3). This allows for the retention but modification to the Laundry Yard steel structure with the yard used as a multi-purpose space and the upper open deck at the level of the Prison Yard used as a sculpture exhibition area.

Scheme B: The F Hall is used for gallery space, gallery support and some portions would be retained for interpretation of its former role as a reception area of the Prison. The new building to the north of F Hall provides the main gallery spaces and a new art themed restaurant (see Figure 2.4). The old Laundry Yard is used as a site for another new building to be used as a new multipurpose space/hall, which acts as a proper introduction/linkage to the arts educational/arts related facilities in D/E Halls. The top floor of Arbuthnot Wing also accommodates the major space for central plant rooms to serve the overall Site.

These schemes were evaluated taking into account their ability to satisfy the demand for the cultural and mechanical plant space needed, the level of intervention at the existing historic buildings, integration with other buildings at the upper courtyard, engineering constraints and the potential environmental impacts. Scheme A being smaller in scale will have less potential environmental impact (particularly on construction dust, noise and landscape and visual impact), but will not provide enough space to meet the demand for cultural space and mechanical plant space needed. With regard to the cultural heritage impact of the new buildings on the existing buildings, the design of the new buildings under both schemes will set back from the existing buildings to ensure least impact to the existing buildings and no building of heritage significance will be demolished. The insufficient space for accommodating all cooling towers and chillers under Scheme A means that some of these plants have to be provided at the existing buildings, meaning more intervention at the existing buildings and thus more significant impact on cultural heritage point of view. Although Scheme B will require the demolition of the Laundry Yard, as discussed above, all associated alteration for upgrading the Laundry Yard structures (as in Scheme A) to current safety and services standard would also already be a compromise against its heritage value. Moreover, the structures to be removed are not considered as a significant loss in heritage terms. Hence, in terms of minimising potential heritage impact, both schemes perform similarly.

Hence, having considered and balanced the demand for the cultural space needed, the level of intervention at the existing historic buildings, integration with other buildings at the upper courtyard, engineering constraints and the potential environmental impacts while achieving the vision of the Project, the implementation of Scheme B is more preferable.

The architectural style to be adopted for the new building could broadly take either a historical or a modern approach. The use of a modern approach over a historical approach has been recommended. The massing and style of the new buildings was dictated by the zoning envelope and height restriction set for potential new buildings under the OZP and the internal space (floor area and ceiling height) needed for the proposed uses. The design takes the approach to set back from the maximum building envelop so as to minimise disturbance to the adjacent historic buildings and leave them intact. Hence, in terms of the massing of the building, it is compatible in terms of both visual and cultural heritage perspective. Different façade treatments have been considered for the new building. The versatility of aluminium in terms of texture, malleability, light weight, lifecycle and general aesthetic makes it the preferred material for the distinctive integration of new construction within the historical heritage compound.

2.2.3 Adaptive Reuse in the Existing Buildings

It is the aim of the Project to bring all the buildings on the Site back into beneficial uses. All buildings will need to be fitted with some modern services, improved fire compartmentation and fire escape provisions. Many will need floors strengthening to accommodate greater floor loads than they were designed for. An attempt has been made to find uses that can be accommodated in the existing buildings with the minimum of disturbance and alteration. In order to ensure that the impact to the historic fabric of the buildings is minimal due to the floor strengthening proposal, a detailed structural report will be prepared by the structural engineer during the detailed stage to evaluate if the strengthening proposal needs to be revised and determine any strengthening work is required for the floors and foundations resulting from the loadings of the new uses, or the alterations, or from the condition of the existing structures. Any structural strengthening proposals will be assessed for their impacts on the character defining elements, and mitigation measures will be considered.

Space is also needed to house the E&M equipment to support the functioning of all facilities and activities on Site. Two options have been considered for locating the chillers and cooling towers:

· Option 1: to locate the chillers and cooling towers in individual building;

· Option 2: to locate the chillers and cooling towers in centralised locations in the new building adjacent to the upper courtyard.

Compared to Option 1, Option 2 has the merits in terms of minimising the modification works at many of the existing buildings and offers a more sustainable solution, therefore has been incorporated into the design of the Project.

2.2.4 Site Circulation

Site Circulation To/From the Project Site

The success of revitalising the CPS will rely on convenient access to the Site and good circulation within the Site. To improve accessibility to the Site, new openings and a footbridge extension linking between mid-levels escalator and the CPS will be needed. To minimise the intervention to the existing fabric of the CPS, openings at the boundary wall are kept to minimum locations where necessary to comply with safety and site servicing requirements.

With the proposed footbridge connection, visitors to the CPS can directly access the Mid-Levels Escalator and minimise the usage of the at-grade pedestrian crossing at the junction of Hollywood Road and Old Bailey Street and the footpath along Hollywood Road. The study of the footbridge design is currently on-going. However, the architectural idea of an open footbridge is the extension of the Parade Ground, which means a simple, minimal slab or platform reaching out to the existing mid-level escalator. The only thing needed in addition to the slab is the handrails on both sides to provide safety. It is also essential to carry through the same hard-paved open-ground character of the Parade Ground. The footbridge design as it is now only provides the minimum width necessary for the public flow to keep the whole structure as simple and as light as possible to minimise potential visual impact. The conceptual design is illustrated in Figure 2.5

Site Circulation Within the Site

To improve the site circulation within the Site, modification or new addition of stairs and walkways between buildings is required. A stairway passage provided with disabled access will be constructed to link up the lower courtyard and the upper courtyard, via A Hall and B Hall. The stairway passage is complemented with a historical path, which winds through the side and back of the Barrack Blocks and the prison halls. The stairway passage provides direct access to all the main public spaces of the Site (exterior and interior, old and new). Although modification to the interior and part of the exterior of B Hall will be required, the construction of the stairway passage will minimise the need of adding new staircases and walkway between the buildings thus minimising exterior building modification works at the CPS.

The key pedestrian circulation corridor is shown in Figure 2.6

2.2.5 Selection of Preferred Design Option

To meet the Project’s vision while balancing different consideration aspects, including minimising potential environmental impacts (particular to the historic buildings), Scheme B was chosen as the preferred design of the new buildings at the CPS. The massing of the new buildings respect the height limit imposed by the OZP and their scale is considered to be compatible with the existing historical buildings from the visual and cultural heritage angles.

Regarding the proposed adaptive reuses in the existing buildings, a concerted approach has been taken to find uses that can be accommodated in the existing buildings with the minimum of disturbance and alterations. The preferred scheme will keep modification of the existing fabric to a minimum by limiting the openings at the boundary wall.

The modification/refurbishment works at the existing buildings are kept to a minimum by carefully assigning appropriate uses to fit in the spaces and adopting a fire engineering approach to minimise alteration while complying with fire safety requirements. Hence, the preferred design has environmental benefits in most of the key aspects of the design. Where environmental impacts are unavoidable, especially during the construction stage, these impacts will be localised and transient and can be mitigated by the implementation of appropriate control measures.

2.3 Project Description

2.3.1 Design Philosophy

New Build

The intention is to use the new buildings as a magnet to draw people to the more enclosed and remote southern part of the Site – the old Prison area. The Old Bailey Wing needs to be large enough to accommodate international touring exhibitions and the Arbuthnot Wing not only has to accommodate a major multi-purpose performance space but is also being used as the location for the cooling systems that will serve the whole Site – this makes it essential to use the space available to the best effect.

The two new buildings have been designed to suit the scale of the Site, and to make maximum use of the available space without dominating the surrounding buildings nor the open space of the Upper Courtyard. The new buildings will be assertive in their difference to the historic buildings. There is no intention to take any of the existing finishes (granite, brick, and painted render) in an attempt to work with them. Rather the proposed cladding of textured metal will pick up the rhythm and scale of the granite walls and will offer a dialogue with the adjacent buildings whilst remaining entirely distinct. This is a well recognised approach to the insertion of new buildings on significant heritage sites. It is generally regarded as a poor solution to have buildings which are a simple pastiche of the adjacent historic buildings. This can lead to confusion in interpretation and tends to diminish rather than enhance the character and quality of the original buildings. Well designed new buildings which are thoughtful in their scale and relationship to the existing buildings and yet have their own contribution as architecture of their own time are widely accepted as the ideal solution to this sort of intervention. The new buildings can be exciting and act as a focus for the visitor without detracting in any way from the significance of the historic buildings, and very importantly in this case, without encroaching on the Prison Yard.

Each new building’s basic massing begins as a full measure of the zoning regulations. They are created as offsets from the historical buildings and rise to +80.0 mPD in height. Distinctive spaces are carved out of the new volumes at the ground level, resulting in generous protected places for gathering. At the same time, these voids shape the direction of pedestrian flow connecting Artbuthnot Road and Staunton Street through the Old Prison Yard.

The design of the new buildings and the Upper Courtyard is illustrated in Figure 2.7.

The Courtyards

One of the main components of the design intention is to preserve the openness of both the Upper and Lower Courtyards and re-activate them for public use as a new type of urban found space. They will define the Site both physically and programmatically as places of gathering, leisure and respite. The Lower Courtyard will be surrounded on each side by several of the Site’s most historic buildings, resulting in a formal open space with generous room for public recreation, organised events, direct access to restaurant and retail attractions as well as smaller scale cultural and educational spaces. The Upper Courtyard will be more thoroughly transformed from a rough and forbidding area to a new open public space with an emphasis on cultural venues. It will be less formal than the Lower Courtyard, with significant existing trees preserved and the rear prison wall enhanced with new green planting.

Site Connections

With three different ground levels and a prison wall around, the Site is currently hard to navigate and access. The main entrance will remain at the extension of Pottinger Street, with new openings added on the East and West sides to improve the Site’s porosity. A new footbridge connected to the Mid-levels escalator system will provide short direct access to the Lower Courtyard, and also publicise the Site’s changes at the key corner of Hollywood Road and Old Bailey Street. An opening in the prison wall along Old Bailey Street, close to Staunton Street, will create a new Western entrance that will be matched on the opposite Eastern side with another wall opening towards Arbuthnot Road. The Bauhinia House will be rehabilitated as a new gatehouse linking Arbuthnot Road to the Old Prison Yard. Together, these openings create an important new East-West route through the upper level of the compound.

To link the new pedestrian network of public spaces within the Site, two main circulation paths running North-South are proposed. A meandering historical path will include re-opened doors and passages, supplemented by a few carefully-crafted new incisions and insertions through existing buildings and walls. New stairs and lifts will provide a more direct path to link the Parade Ground and the Old Prison Yard.

The key pedestrian circulation corridor is shown in Figure 2.6.

2.3.2 Site Layout and Proposed Uses

The Site Plan is shown in Figure 2.8. Public access to the Site will be via the existing and new gates along Hollywood Road, Old Bailey Street and Arbuthnot Road and via the new footbridge. In addition, there will be an additional access point to the loading area along Old Bailey Street.

A combination of cultural and commercial uses is proposed within the CPS. Spaces for interpretation of the architectural and historical features of the existing historic buildings have also been allowed. The commercial facilities include a wide range of restaurants and F&B outlets. There are also multi-purpose spaces which are capable of hosting a wide range of events/activities. These are supplemented by various venues that will be available to the public to hire whether it will be for cocktail parties to host the launch of a new play or product, or conduct a workshop or conference to further the growth of Hong Kong’s economy and its role as a major tourism and growing art hub in the region.

The courtyards within the CPS will remain as open space for general public use. Occasional cultural events may take place in both courtyards. A cross-sectional plan of the upper courtyard showing the new buildings and the stairway passage is presented in Figures 2.9 to 2.11.

2.3.3 Construction and Modification/ Refurbishment Works

The construction and modification/refurbishment works are designed to match the requirements of the proposed uses and enhance the spaces and connections between the buildings and improve circulation throughout the Site. The key modification/refurbishment works will include repairs to internal finishes and necessary alterations, repair of facades, electrical and mechanical upgrading, improve the paving and site circulation between buildings and opening up part of the existing boundary wall to facilitate access to the Site.

Specific refurbishment/modification details of the existing historic buildings varies between individual buildings depending on the existing condition and proposed uses of that building. However, much of the works are to remove later accretions and to bring the buildings back into a good state of repair.

2.4 Construction Programme

The construction works are tentatively scheduled to commence in early 2012 and complete during 2014. The modification works at the existing buildings are divided into four phases. The major demolition and excavation work will be conducted in Phase 1 while Phases 2 to 4 will involve renovation work carried out mainly by the use of handheld/light equipment. The construction work for the new building will be undertaken in parallel to the modification works at the existing buildings.

3 Summary of Environmental Impacts

3.1 Introduction

This Section summarises the environmental impacts associated with the construction and operation of the Project. An impact summary is shown Table 3.1.

3.2 Cultural Heritage

The proposed development attempts to achieve a balance between the redevelopment of the Site into a vibrant and fully accessible area and the conservation of the historic and cultural significance of the Site. The challenge is to ensure that the Site has a long term future and to do this the buildings must have viable uses that generate sufficient revenue to allow for their proper upkeep. This has to be done with the minimum of alteration to the existing fabric of the historic buildings consistent with allowing them to be code compliant and able to be used safely. This has been achieved by selecting proposed uses that fit the current layout of the buildings and where the original fabric can largely be conserved with interventions kept to a minimum.

To achieve the arts hub that is necessary to energise the southern part of the Site it is proposed to erect two new buildings to house gallery and multi-purpose spaces. The new buildings have been sited to avoid major impacts on the fabric of the existing historic buildings whilst providing new access and allowing new uses in the adjacent historic buildings.

The proposed development leave the Site accessible to all members of the public as open space that they can walk through and with many common areas of the buildings available to the public even if they are not using any of the facilities on the Site. There are also spaces that will be retained and have their interiors conserved as interpretation spaces that will allow both formal and informal interpretation of the site. These interpretation spaces are in all the major buildings on the Site.

The proposed development will leave all of the significant historic buildings intact and with very little alteration to their external fabric. There will be some intrusion into the historic interiors but this will be minimal and will be offset by the restoration of much of the interior of the buildings to something close to the original design intention with the removal of modern insertions. The primary external spaces, the Police Parade Ground and the Prison Yard, are left in their present form with no intrusion into the historic space. Similarly the walls that surround the site and divide it between Police, Prison and Magistracy will all be retained and conserved. Such minimal alteration as is proposed to the external walls is to provide good public access to allow the Site to be genuinely open to all people.

The key mitigation measures proposed to minimise the impact of the new structure construction to the existing buildings include the use of non-percussive piling methods for the construction of the foundation for the new buildings and a lateral support system to minimise any potential vibration impact. To mitigate impacts associated with the modification/refurbishment works at the existing buildings, a comprehensive survey and impact assessment of the Character Defining Elements (CDE) will be undertaken during the detailed design stage and the associated protection measures for implementation during the construction phase will be proposed and implemented. Prior to commencement of the construction works, a baseline condition survey and baseline vibration impact assessment will be conducted by a specialist to define the vibration control limits and recommend a vibration monitoring proposal for the concerned historic buildings in CPS.

An archaeological investigation will be carried out during detailed design stage to determine the impact to potential archaeological resources, if any, and recommend and implement appropriate mitigation measures, as necessary. Details of the proposed mitigation measures for implementation during the detailed design and construction phases can be referred to Table 3.1.

During the operation phase, the Conservation Management Plan (June 2008), the Heritage Operational Strategy and Manual and the Interpretation Strategies/Plans will be implemented. The compliance and effectiveness of the implementation of these plans/strategies will be subject to regular audit.

To conclude, the potential impacts on the built heritage and potential archaeological resources within the Site and the built heritage resources within 50m from the Site are considered acceptable with mitigation measures.

3.3 Landscape and Visual

A baseline study was conducted and nine landscape resources (LRs), seven landscape character areas (LCAs), and twelve visual sensitive receivers (VSRs) representing four VSR categories were identified and their sensitivity/quality assessed. The impact on these LRs/LCAs and VSRs was assessed and measures suggested to mitigate the impacts.

The Project will produce some adverse landscape and visual impacts but these can be eliminated, reduced or offset to a large extent by specific mitigation measures (e.g. aesthetic treatment of the proposed visible structures, tree compensation and protection measures, lighting control etc). There will also be some beneficial landscape and visual impacts from the renovation and refurbishment of the existing buildings and open spaces within the Site and along the Site boundary wall, the addition of a new green wall and planting site and protection and enhancement of the existing soft landscape. All adverse landscape impacts are reduced to slight-insignificant by year 10, with the impact on the open space with the declared monument (LR4) being slightly beneficial. All adverse visual impacts are reduced to moderate to insignificant by day 1 of operation (and remain the same at year 10).

Eleven trees were found within the Site. Amongst the eleven trees found on site, four dead/damaged trees (T1, T2, T3 and T4) and one healthy tree (T10) will be removed. The rest of the trees will be retained. Due to site and technical constraints, in situ preservation and transplanting cannot be recommended. Mitigation measures to protect the retained trees and compensation of the removal of the healthy tree (T10) by planting of six trees with total Diameter at Breast Height (DBH) exceeding that of T10 will be implemented. With the implementation of the mitigation measures, impacts on the trees are considered acceptable.

The design intention for the new buildings is to use non-reflective material for the façade which will help to minimise potential glare interference. At night, light emitted from the building will be partially screened by the façade units, creating a balance between being able to express the life of the buildings within while also being able to reduce light pollution. The most open area within the new buildings at night is the public restaurant which is located on the north end of Old Bailey Wing and away from the row of residential buildings directly to the south. All lights within the CPS will be turned to night time mode (dimmed) after 11pm. Currently no façade lighting is proposed for the existing buildings. Given the choice of façade treatment and Site lighting considerations, the glare impact from the Project is considered to be acceptable.

Therefore according to Annex 10 of the EIAO-TM, the potential Landscape and Visual Impacts due to the construction and operation of the Project are considered acceptable with mitigation.

3.4 Noise

3.4.1 Construction Phase

Owing to the close proximity of some of the NSRs to the works area of the Project Site, mitigation measures are required to be implemented to mitigate the construction noise impacts. Practicable mitigation measures, including good construction site practices, use of quiet PME, movable noise barriers and scheduling of PME/construction activities, are recommended. With the implementation of the recommended mitigation measures, the mitigated construction noise levels at the representative NSRs are predicted to range between 67 dB(A) to 75 dB(A), compling with the construction noise criterion of 75 dB(A) throughout the construction period. Noise monitoring during the construction stage is recommended to ensure compliance with the relevant noise criteria.

3.4.2 Operation Phase

The predicted operational noise levels at the representative NSRs are expected to comply with the day-time and evening-time criteria based on the assessment using a set of specified maximum SWLs for the fixed plant to be installed for the Project. The predicted noise levels during day-time and evening period and night-time period at NSRs ranged from 52 dB(A) to 56 dB(A) and 42 dB(A) to 49 dB(A), respectively. The maximum sound power level for the fixed plant will be included in the contract specification to be issued to suppliers or contractors for the equipment. Attenuation measures, if required, will be provided to the fixed plant for achieving the guaranteed noise levels during the detailed design stage. The requirements of not exceeding the total sound power level and noise monitoring for each independent event at the courtyards will be specified in the event organiser’s contract document.

3.5 Air Quality

3.5.1 Construction Phase

The construction of the Project involves small-scale site formation/foundation works, new structure construction, refurbishment works for the existing buildings, and minor-scale demolition of existing structures. Excavation, truck movements, materials handling and wind erosion of open stockpiles of dusty materials were identified as the major dust generating activities. In view of the small size of the worksite and small quantity of excavated materials to be generated, limited excavated soil will be stockpiled on-site. No adverse fugitive dust impact is envisaged with the implementation of dust control measures and adoption of good construction site practices.

Minor air quality impacts associated with gaseous emissions of diesel-powered construction plant and equipment are anticipated as only a small number of construction vehicles and plant will be operated in the limited works areas at any one time.

3.5.2 Operation Phase

During operation phase, it is confirmed that electric stoves will be used for the kitchens and electrostatic precipitators (ESPs) will also be installed at the exhausts of the kitchens to capture potential particulate emissions. Proper siting of kitchen exhaust will be considered during the detailed design stage. As such, potential air quality impacts associated with gaseous emissions from kitchen exhausts are not anticipated.

Three stacks were identified to be in operation within the study area and were all operated by restaurants. They are all located at least 30m above ground. It was anticipated that these operating stacks were operating with towngas or ULSD or alternative fuel types in which emissions are low and comply with the requirements in the Air Pollution Control (Fuel Restriction) Regulation and its amendment of 2008. Taking into account the height of emission points, the presence of high-rise buildings located between the Project Site and the operating stacks and the recent 5 year NO₂ and SO₂ monitoring data obtained from the nearby EPD air quality monitoring station, no adverse air quality impacts are anticipated for the Project.

The design of the Project encourages visitors to get to the Site via footbridge and pedestrian crossings, therefore, traffic flow induced by operations of the Project (eg tourist buses and private cars) is anticipated to be very small as compared to the existing traffic flow on nearby roads. No adverse traffic emission impact during the operation phase of the Project is therefore expected.

3.6 Water Quality

3.6.1 Construction Phase

Potential sources of water quality impact associated with the construction activities include Site runoff from the Project Site and sewage produced by on-site workforce. Prior to the modification works, perimeter cut-off drains to direct off-site water around the site will be constructed and internal drainage works and erosion and sedimentation control facilities implemented. Channels, earth bunds or sand bag barriers will be provided on site to direct potential contaminated runoff to the on-site slit trap before discharged to the stormwater drains. The existing toilet facilities of the CPS will be available to the construction workforce. The sewage will be discharged to the public sewer system. In view of the nature and scale of the Project, with the implementation of good construction and site management practices, adverse water quality impact is not anticipated.

3.6.2 Operation Phase

During operation phase of the Project, the sewage generated by the staff, visitors, café and restaurant have the potential to cause adverse water quality impacts if not managed properly. The anticipated quantities of wastewater to be generated during the Project will be small (a peak flow of 50.25 L/s). The existing sewers will be adequate to handle the anticipated volume of sewage to be discharged from the CPS and the adjacent developments, and no improvement to the existing sewers is required. No adverse water quality and sewerage impacts are envisaged.

3.7 Waste Management

3.7.1 Construction Phase

C&D Material will be segregated on-site into inert and non-inert materials and stored in different containers or skips to facilitate reuse of the inert materials and proper disposal of the non-inert construction waste. Specific areas of the work site will be designated for such segregation and storage if immediate use is not practicable. Recycling bins will be provided at strategic locations to facilitate recovery of aluminium can and waste paper from the Site. At the commencement of the construction works, training will be provided to workers on the concepts of site cleanliness and on appropriate waste management procedures, including waste reduction, reuse and recycling.

It is estimated that a total of 16,440 m³ of public fills (consisting of 12,900 m³ of excavated materials, 3,540 m³ of public fill from new building construction and modification/ renovation works) and 890 m³ of construction waste will be generated during the construction phase. The public fill will be sent to public filling facilities for beneficial reuse while the construction waste will be disposed of at landfills.

With respect to the scale of the construction activities, it is anticipated that the quantity of chemical waste to be generated will be small (less than a hundred litres per month during the construction phase). It is also estimated that about 130 kg of general refuse will be generated per day by the construction workers. With the implementation of general good construction site practices, the construction of the Project will not cause adverse waste management, traffic or environmental impacts (including potential hazard, air and odour emissions, noise and wastewater discharge).

3.7.2 Operation Phase

It is estimated that general refuse (9,250 kg per day) and food waste (460 kg per day) will be generated during the operation phase. Recycling bins will be provided at strategic locations to facilitate recovery of aluminium can and waste paper from the Site. With good site practices, the potential environmental impacts (including potential hazard, air and odour emissions, noise and wastewater discharge) associated with the storage, handling, collection, transport and disposal of waste arising from the operation of the Project will meet the criteria specified in the EIAO-TM and no adverse waste management impacts are anticipated.

Table 3.1 Impact Summary

Assessment Aspect	Construction Phase	Operation Phase
Cultural Heritage
Assessment Points / Sensitive Receivers	· The CPS (including three Declared Monuments: the Central Police Station, the Central Magistracy and the Victoria Prison) · Potential archaeological remains within the CPS · Built heritage resources within 50m of the Project Site (including the Grade 1 historic street (Pottinger Street), Proposed Grade 3 historic building (No. 20 Hollywood Road), Hollywood Road, Old Bailey Street, Chancery Lane and Steps, Arbuthnot Road and Walls at Old Bailey Street)	· The CPS (including three Declared Monuments: the Central Police Station, the Central Magistracy and the Victoria Prison) · Potential archaeological remains within the CPS
Relevant Criteria	· Environmental Impact Assessment Ordinance (EIAO) (Cap. 499. S16), Technical Memorandum on the EIA Process, Annex 10 and 19 (EIAO TM) and Guidance Notes on Assessment of Impact on Sites of Cultural Heritage in EIA Studies; · Antiquities and Monuments (AM) Ordinance (Cap. 53); · Guidelines for Cultural Heritage Impact Assessment (CHIA) for Adaptive Reuse Projects (as at May 2009); · Hong Kong Planning Standards and Guidelines (HKPSG); and · Land (Miscellaneous Provisions) Ordinance.	· Environmental Impact Assessment Ordinance (EIAO) (Cap. 499. S16), Technical Memorandum on the EIA Process, Annex 10 and 19 (EIAO TM) and Guidance Notes on Assessment of Impact on Sites of Cultural Heritage in EIA Studies; · Antiquities and Monuments (AM) Ordinance (Cap. 53); · Guidelines for Cultural Heritage Impact Assessment (CHIA) for Adaptive Reuse Projects (as at May 2009); · Hong Kong Planning Standards and Guidelines (HKPSG); and · Land (Miscellaneous Provisions) Ordinance.
Results of Impact	Built Heritage within the CPS · The range of Impact Category Ratings for the interventions in the following buildings are 1 (Beneficial), 2 (Acceptable), and 3 (Acceptable with Mitigation Measures). The overall Heritage Impact of the proposed interventions to these buildings is therefore regarded as acceptable to enable the building to have a new adaptive use: o Headquarters Block o Armoury o Barrack Block o Married Inspectors’ Quarters and Deputy Superintendents House o Married Sergeant’s Quarters o Single Inspectors’ Quarters o Ablutions Block o Central Magistracy o Superintendent’s House o A Hall o B Hall o C Hall o D Hall o E Hall o F Hall o Bauhinia House o Parade Ground o Laundry (structure with little architectural interest and has been altered over time with substantial repairs to be demolished) o Walls and Revetments · An impact rating of the interventions in the following buildings/features is 2 – Acceptable Impact: o Garage (structure with no architectural or historical significance to be demolished to make way for open space) o General Office (structure with no architectural or historical significance to be demolished) o Prison Yard	It is anticipated that with the implementation of the Conservation Management Plan, the Heritage Operational Strategy & Manual and the Interpretation Strategies/Plans, the impact rating for the CPS as a whole will be 1 – Beneficial.
	Potential Archaeological Resources within the CPS · It is anticipated that the areas identified to have archaeological potential are considered to be low or fairly low. Therefore, the impact on the low archaeological potential resources areas is likely to be acceptable with mitigation measures being taken. Impact ratings for specific areas are as follows: o Parade Ground: 3 – Acceptable Impact with Mitigation Measures o Prison Yard: 3 – Acceptable Impact with Mitigation Measures o Barracks Lane (cell blocks south of building 3): 3 – Acceptable Impact with Mitigation Measures o The Garage: No Impact o Married Inspectors’ Quarters and Deputy Superintendent’s House: No Impact o The area between A Hall and B Hall: 3 – Acceptable Impact with Mitigation Measures o The area between and beneath Ablutions block and the revetment wall to the south: 3 – Acceptable Impact with Mitigation Measures o West end of D Hall (building 14): 3 – Acceptable Impact with Mitigation Measures o Laundry (building 16): 3 – Acceptable Impact with Mitigation Measures o General Office (building 18): 3 - Acceptable Impact with Mitigation Measures Built Heritage Resources Outside the CPS · Generally the works within the Site will have little or no impact on built heritage resources outside the CPS. This is in large part because the changes to occur within the CPS are contained within the constraints of the compound itself. Impact ratings for specific areas are as follows: o Grade 1 historic building (Pottinger Street: 1 – Beneficial Impact) o Proposed Grade 3 historic building (No. 20 Hollywood Road): 2 – Acceptable Impact with mitigation measures o Hollywood Road: 2 – Acceptable Impact o Old Bailey Street: 2 – Acceptable Impact o Chancery Lane: 1 – Beneficial Impact o Arbuthnot Road: 1 – Beneficial Impact o Walls and Tunnel of Old Bailey Street: 2 – Acceptable Impact o Chancery Lane Steps: 1 – Beneficial Impact
Extents of Exceedance	Not expected	Not expected
Avoidance / Mitigation Measures	Prior to construction commencement during the detailed design stage of the Project, the following works will be conducted to ensure adequate information are obtained to finalise the design and conservation work required: · Comprehensive survey and impact assessment of Character Defining Elements (CDE); · Archival recording; · Addition and alteration (A&A) works proposal submissions; · Detailed structural assessment; and · Archaeological investigation. The modification/refurbishment works at the existing buildings are kept to a minimum by carefully assigning appropriate uses to fit in the spaces and adopting a fire engineering approach to minimise alteration while complying with fire safety requirements. The general mitigation measures to be used during the construction phase will include: · Prior identification and recording of the all the significant features, finishes, fittings and contents in the existing buildings, and assessment of their vulnerability during construction. This should include for instance the recording of historic doors which are vulnerable to damage if left in situ or carelessly removed and stored. · Permanent or temporary removal off site of loose or vulnerable items. · Preparation of a schedule of protection works to preserve or secure items and finishes remaining in situ during construction. · Non-percussive piling methods will be adopted for the construction of the foundation for the new buildings and a lateral support system will be used to minimise the potential vibration impact to adjacent historic buildings during construction. · Protection measures to the exteriors and interiors of the buildings during construction operations. · Ensuring the responsible contractor understands the significance and vulnerabilities of the building structures, constructions, features and finishes prior to starting the work to avoid overloading or inappropriate storage or construction activities. · Use of appropriate heritage related construction methods for the modification and refurbishment works As there is no development proposal that involves soil excavation on one of the nine areas (Garage), other than possibly for new underground services which will be designed during the detailed drawing stage no impact on this archaeological potential area is anticipated. Subject to the findings of the archaeological investigation, appropriate mitigation measures will be recommended and agreed with the AMO. Prior to commencement of the construction works, a baseline condition survey and baseline vibration impact assessment has been recommended to be conducted by a specialist covering the existing historic buildings in the CPS Site and the Proposed Grade 3 Historic building (No. 20 Hollywood Road) outside CPS to define the vibration control limits and recommend a vibration monitoring proposal for the concerned historic buildings in CPS. As the concerned historic buildings in the CPS Site are declared monuments, the proposal should be submitted to the Antiquities Authority under the AM Ordinance for granting a permit for the work. If the evaluated and/or measured vibrations have been found to exceed the allowable values or if damage to either structural or non-structural elements of the historic buildings has been identified, the construction work should be stopped and the construction method and appropriate mitigation measures should be reviewed and submitted to the Antiquities Authority for approval.	To implement the Conservation Management Plan (June 2008), the Heritage Operational Strategy and Manual and the Interpretation Strategies/Plans. Regular audit for checking the compliance and effectiveness of the mitigation measures recommended in Sections 3.7.4 and 3.7.5 of the EIA report. The detailed proposal of the regular audit such as methodology (e.g. performance and monitoring indicators, control tools, frequency of the audit, etc) and the conservation professionals to be engaged should be agreed with AMO prior to operation commencement.
Residual Impact	Slight to moderate residual impact is expected due to the alteration to the overall visual appearance of the Site. However, the majority of the potential impact is beneficial to the CPS and its users. With the implementation of the CMP and the mitigation measures recommended in Section 3.7 the residual impact is considered acceptable.	Not expected
Environmental Acceptability	Impacts to cultural heritage resources are acceptable with mitigation measures.	Impacts to cultural heritage resources are acceptable with mitigation measures.
Landscape & Visual
Assessment Points / Sensitive Receivers	Landscape Resources (LRs): LR1 – Transport Route LR2 - Commercial / Residential /Institutional Building Area LR3 – Buildings within Declared Monument LR4 – Open Space within Declared Monument LR5 – Public Park/ Recreational Area LR6 – Hong Kong Zoological & Botanical Garden LR7 – Vegetated Slope LR8 – Natural Woodland on Hillside LR9 – Temple Area Landscape and Visual Character Areas (LCAs): LCA1 – Historical Landscape LCA2 – LCSD Theme Park Landscape LCA3 – Medium/High-rise Commercial Urban Landscape LCA4 – Residential/ Commercial Urban Landscape LCA5 – Central Civic Administration Landscape LCA6 – Natural Hillside Landscape LCA7 – Major Transport Corridor Visually Sensitive Receivers (VSRs) and Vantage Points (VPs) VSR T2 – Central/ Mid-Levels Escalator above Hollywood Road (VPa) VSR H/O1 – Medium/ High Level Commercial/Residential Building(s) above Hollywood Road (VPb) VSR T3 – Street Level at The Centrium on Arbuthnot Road (VPc) VSR H2 – Medium/High Rise Level Residential Building(s) on Chancery Lane (VPd) VSR T4 – Street Level at Old Bailey Street/ Chancery Lane Junction (VPe) VSR T5 – Street Level at Hollywod Road/ Pottinger Street Junction (VPf) VSR T1 Street Level at Staunton Street/ Peel Street Junction VSR O1 Medium/High Level Commercial Building(s) (IFC Building) VSR O2 Medium/High Level CommercialBuilding(s) (QRC Building) VSR H1 Medium/High Level Residential Buildings in Mid-levels (Grand Panorama Building) VSR R1 Open/Park Area off Old Bailey Street VSR H3 Medium/High Level Residential Buildings on Old Bailey Street The tree survey undertaken indentified eleven trees within the Site, using the government's definition of a tree as a woody plant with a trunk diameter of at least 95 mm at 1.3 m height. None of the trees can be gauged as being in ‘excellent’ health and only two trees, namely the large T5 (Mangifera indica) in the Parade Ground, and the relatively small wall tree T10 (Ficus microcarpa) between the Police and Prison sites, have performed sufficiently well to deserve the good rating.	Landscape Resources (LRs): LR1 – Transport Route LR2 - Commercial / Residential /Institutional Building Area LR3 – Buildings within Declared Monument LR4 – Open Space within Declared Monument LR5 – Public Park/ Recreational Area LR6 – Hong Kong Zoological & Botanical Garden LR7 – Vegetated Slope LR8 – Natural Woodland on Hillside LR9 – Temple Area Landscape and Visual Character Areas (LCAs): LCA1 – Historical Landscape LCA2 – LCSD Theme Park Landscape LCA3 – Medium/High-rise Commercial Urban Landscape LCA4 – Residential/ Commercial Urban Landscape LCA5 – Central Civic Administration Landscape LCA6 – Natural Hillside Landscape LCA7 – Major Transport Corridor Visually Sensitive Receivers (VSRs) and Vantage Points (VPs) VSR T2 – Central/ Mid-Levels Escalator above Hollywood Road (VPa) VSR H/O1 – Medium/ High Level Commercial/Residential Building(s) above Hollywood Road (VPb) VSR T3 – Street Level at The Centrium on Arbuthnot Road (VPc) VSR H2 – Medium/High Rise Level Residential Building(s) on Chancery Lane (VPd) VSR T4 – Street Level at Old Bailey Street/ Chancery Lane Junction (VPe) VSR T5 – Street Level at Hollywod Road/ Pottinger Street Junction (VPf) VSR T1 Street Level at Staunton Street/ Peel Street Junction VSR O1 Medium/High Level Commercial Building(s) (IFC Building) VSR O2 Medium/High Level CommercialBuilding(s) (QRC Building) VSR H1 Medium/High Level Residential Buildings in Mid-levels (Grand Panorama Building) VSR R1 Open/Park Area off Old Bailey Street VSR H3 Medium/High Level Residential Buildings on Old Bailey Street Trees within the Site.
Relevant Criteria	· Environmental Impact Assessment Ordinance (Cap.499, S.16) and the Technical Memorandum on EIA Process (EIAO TM), particularly: o Annex 10 (Criteria for Evaluating Visual and Landscape Impact, and Impact on Sites of Cultural Heritage) o Annex 18 (Guidelines for Landscape and Visual Impact Assessment) · EIAO Guidance Note No. 8/2002 (Preparation of Landscape and Visual Impact Assessment under the Environmental Impact Assessment Ordinance); · ETWB TCW No. 3/2006 - Tree Preservation; · ETWB TCW No. 29/2004 - Registration of Old and Valuable Trees, and Guidelines for their Preservation · ETWB-TC(W) No. 10/2005 - Planting on Footbridges and Flyovers · Land Administration Office (LAO), Lands Department Practice Note No. 7/2007 - Tree Preservation and Tree Removal Application for Building Development in Private Projects · WBTC No. 7/2002 - Tree Planting in Public Works; · Hong Kong Planning Standards and Guidelines Chapter 4 (Recreation, Open Space and Greening) and Chapter 11 ( Urban Design Guidelines); and · Study on Landscape Value Mapping of Hong Kong	· Environmental Impact Assessment Ordinance (Cap.499, S.16) and the Technical Memorandum on EIA Process (EIAO TM), particularly: o Annex 10 (Criteria for Evaluating Visual and Landscape Impact, and Impact on Sites of Cultural Heritage) o Annex 18 (Guidelines for Landscape and Visual Impact Assessment) · EIAO Guidance Note No. 8/2002 (Preparation of Landscape and Visual Impact Assessment under the Environmental Impact Assessment Ordinance); · ETWB TCW No. 3/2006 - Tree Preservation; · ETWB TCW No. 29/2004 - Registration of Old and Valuable Trees, and Guidelines for their Preservation · ETWB-TC(W) No. 10/2005 - Planting on Footbridges and Flyovers · Land Administration Office (LAO), Lands Department Practice Note No. 7/2007 - Tree Preservation and Tree Removal Application for Building Development in Private Projects · WBTC No. 7/2002 - Tree Planting in Public Works; · Hong Kong Planning Standards and Guidelines Chapter 4 (Recreation, Open Space and Greening) and Chapter 11 ( Urban Design Guidelines); and · Study on Landscape Value Mapping of Hong Kong
Results of Impact / Extent of Exceedance	During the construction stage, potential landscape and visual impacts may arise from: · works for demolition of surrounding stone brick wall and construction of entrance to service yard; · works for demolition of works for demolition of existing building structures – the Garage, Workshop & Laundry and General Office; · works for cleaning, re-painting, dismantling and reinstatement of sections of surrounding stone brick wall; · conservation, repair and refurbishment work on the external façade of the retained buildings including erection of scaffolding; · excavation work including that for construction of basement in lower courtyard; · new custom paving works throughout the Site; · construction of new built structures (Old Bailey Wing, Arbuthnot Wing, new footbridge); · construction of new pavement west of Arbuthnot Road and extension of existing pavement on Old Bailey Street around pier for new footbridge; · temporary stockpiling of construction and demolition materials and temporary storage of construction equipment; · temporary use of construction equipment on-site including cranes and vehicles; · off-site construction traffic such as haulage of excavated materials; · temporary traffic/ road diversions; · night-time lighting; and · dust during dry weather. Significant Impact on the following LRs/LCA at construction phase without mitigation: · LR3 – Buildings within Declared Monument · LR4 – Open Space within Declared Monument · LCA1 – Historical Landscape Slight Impact on the following LRs/LCA at construction phase without mitigation: · LR1 – Transport Route · LCA4 – Residential/Commercial Urban Landscape Impacts on all other LRs/LCAs at construction phase without mitigation are insignificant. Amongst the eleven trees found on site, four dead/damaged trees (T1, T2, T3 and T4) and one healthy tree (T10) will be removed. The rest of the trees will be retained. The size, tree form, performance, and landscape and amenity value of T10, in comparison with the large and robust wall trees in other parts of the city, are relatively low. Due to site and technical constraints, in situ preservation and transplanting cannot be recommended. Significant Impact on the following VSRs at construction phase without mitigation: · T2 – Central/ Mid-Levels Escalator above Hollywood Road · H/O1 – Medium/High Level Commercial/Residential Building(s) above Hollywood Road · T3 – Street Level at The Centrium on Arbuthnot Road · H2 – Medium/High Rise Level Residential Building(s) on Chancery Lane · T5 - Street Level at Hollywood Road/Pottinger Street Junction · H3 – Medium/High Level Residential Buildings on Old Bailey Street Moderate Impact on the following VSRs at construction phase without mitigation: · T4 – Street Level at Old Bailey Street/ Chancery Lane Junction · H1 – Medium/High Level Residential Buildings in Mid-levels (Grand Panorama Building) Slight Impact on the following VSRs at construction phase without mitigation: · T1 – Street Level at Staunton Street/ Peel Street Junction · O1 – Medium/High Level Commercial Building(s) (IFC Building) · O2 – Medium/High Level Commercial/Residential Building(s) (QRC Building) · R1 – Open/Park Area off Old Bailey Street	During the operation stage, potential landscape and visual impacts would be related to the following: · landscaping works (eg new planting site, new green wall, existing tree treatment); · repaired and refurbished external façades of retained buildings; · operation of new built structures (Old Bailey Wing, Arbuthnot Wing, new footbridge, new access points); · new pavement – west of Arbuthnot Road and extension of existing on Old Bailey Street around pier for new footbridge; · cleaned, re-painted, refurbished and repaired sections of external stone wall and building façades; and · night time lighting. The impacts of the Project’s operation phase before mitigation on any LR/LCA are not considered significant. Moderate impact on the following LRs/LCA at operation phase without mitigation o LR3 – Buildings within Declared Monument o LCA1 – Historical Landscape Insignificant impact on the following LRs/LCA at operation phase without mitigation o LR1 – Transport Route o LR4 – Open Space within Declared Monument o LCA4 – Residential/Commercial Urban Landscape Significant Impact on the following VSRs at operation phase without mitigation: · T3 – Street Level at The Centrium on Arbuthnot Road · H2 – Medium/High Rise Level Residential Building(s) on Chancery Lane · H3 – Medium/High Level Residential Buildings on Old Bailey Street Moderate Impact on the following VSRs at operation phase without mitigation: · T2 – Central/Mid-Levels Escalator above Hollywood Road · H/O1 – Medium/High Level Commercial/Residential Building(s) above Hollywood Road · T4 – Street Level at Old Bailey Street/ Chancery Lane Junction · H1 – Medium/High Level Residential Buildings in Mid-levels (Grand Panorama Building) Slight Impact on the following VSRs at operation phase without mitigation: · T5 – Street Level at Hollywood Road/Pottinger Street Junction · T1 – Street Level at Staunton Street/ Peel Street Junction · O1 – Medium/High Level Commercial Building(s) (IFC Building) · O2 – Medium/High Level Commercial Building(s) (QRC Building) · R1 – Open/Park Area off Old Bailey Street Glare Impact/Interference and Night-time Lighting The design intention for the new buildings is to use non-reflective material for the façade which will help to minimise potential glare interference. At night, light emitted from the building will be partially screened by the façade units, creating a balance between being able to express the life of the buildings within while also being able to reduce light pollution. The most open area within the new buildings at night is the public restaurant which is located on the north end of Old Bailey Wing and away from the row of residential buildings directly to the south. All lights within the CPS will be turned to night time mode (dimmed) after 11pm. Currently no façade lighting is proposed for the existing buildings. Given the choice of façade treatment and Site lighting considerations, the glare impact/interference and night-time lighting from the Project is considered to be acceptable.
Avoidance / Mitigation Measures	M1 Detailed Design Consideration CM1 In-situ Tree Protection - Cordon Zone (CZ) CM2 In-situ Tree Protection - Advanced & Phased Root Pruning CM3 In-situ Tree Protection - Foliage cleansing system CM4 In-situ Tree Protection - Monthly inspection CM5 Light Control CM6 Compensatory Tree Planting CM7 Vertical Greening CM8 New Custom Paving	OM1 In-situ Tree Protection - Quarterly inspection OM2 Soft Landscape Maintenance OM3 Architectural Maintenance OM4 Light Control
Residual Impact	Moderate Impact on the following LRs/LCA at construction phase with mitigation: · LR3 - Buildings within Declared Monument · LR4 – Open Space within Declared Monument · LCA1 – Historical Landscape Slight Impact on the following LRs/LCA at construction phase with mitigation: · LR1 – Transport Route · LCA4 – Residential/Commercial Urban Landscape Impacts on all other LRs/LCAs at construction phase with mitigation are insignificant. Mitigation measures to protect the retained trees and compensation of the removal of T10 will be implemented. With the implementation of the mitigation measures, impacts on the trees are considered acceptable. Construction is assumed to be carried out following standard good practise, and the construction impact will not be significantly reduced by additional mitigation measures such that upon mitigation, all the visual impacts are considered to remain the same as prior to mitigation. However, it is worth noting that the impact will be transient and will be reduced gradually following operation.	The residual impacts on all LCAs at day 1 of operation with mitigation are insignificant, with the exception of a slight residual impact on LR3 – Buildings within Declared Monument LCA1 – Historical Landscape. All ratings for the residual impacts at year 10 of operation with mitigation remain the same, with the exception of LR4 – Open Space within Declared Monument which is enhanced from insignificant to slightly beneficial. Upon implementation of mitigation measures, at operation day 1 the visual impacts on: • T3 (Street Level at the Centrium on Arbuthnot Road), H2 (Medium/High rise Level residential Building(s) on Chancery Lane) and H3 (Medium/High Level Residential Buildings on Old Bailey Street) will reduce to moderate while that for T2 (Central/Mid-levels Escalator above Hollywood Road) will remain moderate. • H/O1 (Medium/High Level Commercial/Residential Building(s) above Hollywood Road), T4 (Street Level at Old Bailey Street/ Chancery Lane Junction) and H1 (Medium/High Level Residential Buildings in Mid-levels [Grand Panorama Building]) will reduce to slight while impacts on T5 (Street Level at Hollywood Road/Pottinger Street Junction), T1 (Street Level at Staunton Street/ Peel Street Junction) and O2 (Medium/High Level Commercial Building(s) [QRC Building]) will remain slight. • O1 (Medium/High Level Commercial Building(s) [IFC Building)) and R1 (Open/Park Area off Old Bailey Street) will reduce to insignificant. At operation year 10 with mitigation, the residual impacts remain the same for all the VSRs.
Environmental Acceptability	Impacts on landscape resources and sensitive receivers are acceptable with mitigation measures.	Impacts on landscape resources and sensitive receivers are acceptable with mitigation measures.
Noise
Assessment Points / Sensitive Receivers	N1 – Amber Lodge N2 – Ho Fook Building N3 – Old Bailey Street Police Married Quarters N4 – Cambridge Villa N5 – Chancery House N6 – Chancery Mansion	N1 – Amber Lodge N2 – Ho Fook Building N3 – Old Bailey Street Police Married Quarters N4 – Cambridge Villa N5 – Chancery House N6 – Chancery Mansion
Relevant Criteria	Daytime (0700-1900 hours) construction noise standards stipulated in the EIAO-TM is Leq 30min75 dB(A) for all domestic premises on any day not being a Sunday or general public holiday for general construction works. General construction works during the restricted hours follow the criteria set in the GW-TM. These are: 1. LAeq, 5min 65 dB for area with Area Sensitivity Rating of B for all days during the evening (1900-2300 hours) and general holidays (including Sundays) during the day and evening (0700-2300 hours); and 2. LAeq, 5min 50 dB for area with Area Sensitivity Rating of B for all days during the night-time (2300-0700 hours)	The criteria noise limits for planning purposes are set out in the EIAO-TM as follows: · the total fixed source noise level at the facade of the nearest NSR is at least 5 dB(A) lower than the appropriate Acceptable Noise Levels (ANL) as specified in the IND-TM; or · the prevailing background noise level (for quiet areas with level 5 dB(A) below the ANL). Based on the above EIAO-TM and IND-TM specification, daytime and evening (0700-2300 hours) noise limit for N1-N3 and N4-N5 is 59 dB(A) and 54 dB(A), respectively. The night-time (2300-0700 hours) noise limit for N1-N3 and N4-N5 is 50 dB(A) and 49 dB(A), respectively.
Results of Impact	The predicted unmitigated noise levels at NSRs ranges from 79 to 89 dB(A). With the implementation of mitigation measures, the noise levels predicted at NSRs ranges from 67 to 75 dB(A).	The predicted noise levels during day-time and evening time period at NSRs range from 52 to 56 dB(A). The predicted noise levels during night-time period at NSRs range from 42 to 49 dB(A).
Extents of Exceedance	Without the implementation of mitigation measures, exceedance up to 14 dB(A) is predicted. With the implementation of mitigation measures, noise levels at all NSRs comply with the criteria.	Not expected.
Avoidance / Mitigation Measures	· Good construction site practice; · Use of quiet PME; · Adoption of movable noise barriers; · Use of noise insulation sheet; and · Scheduling of PME/construction activities.	Although no adverse noise impact is expected due to the operation of fixed plant items, it is still recommended that the following good practices be implemented as far as practicable to minimise the potential impact: · Choose quieter equipment; · Include noise levels specification when ordering new plant items; · Locate fixed plant items or noise emission points away from the NSRs as far as practicable; · Locate noisy machines in completely enclosed plant rooms or buildings with suitable and practicable noise remedies; and · Develop and implement a regularly scheduled plant maintenance programme so that plant items are properly operated and serviced. The programme should be implemented by properly trained personnel. The maximum sound power levels for the fixed plant will be included in the contract specification to be issued to suppliers or contractors for the equipment. Noise Emissions from Courtyard Events and Public Address (PA) System · good management practices shall be in place, including noise monitoring, setting up a complaint hotline, and distributing advance notice to nearby NSRs. It is recommended that good management practices be implemented during both rehearsals and shows; · in any event that an outdoor event is expected, the event organizer is required to undertake noise monitoring at least at one of the affected NSR. One set of L_eq_(30min)noise measurements before and during the event should be taken; · as a fallback option, should non-compliance of the relevant noise criteria at the NSRs be identified for the event, immediate mitigation measures (such as turning down/off of music volume) should be implemented; and · the requirements of not exceeding the total sound power level and noise monitoring for each independent event are specified in the event organisers’ contract document.
Residual Impact	Not expected.	Not expected.
Environmental Acceptability	No adverse noise impact with the implementation of mitigation measures.	No adverse noise impact with the implementation of good practices.
Air Quality
Assessment Points / Sensitive Receivers	A1 – Au’s Building A2 – Chinachem Hollywood Centre A3 – Carfield Commercial Building A4 – Vimark House A5 – Yu Yuet Lai Building A6 – The Centrium A7 – Chancery Mansions A8 – Chancery House A9 – Cambridge Villa A10 – Sunrise House A11 – Old Bailey Street Junior Police Office Married Quarter A12 – Ho Fook Building A13 - Winning House	A1 – Au’s Building A2 – Chinachem Hollywood Centre A3 – Carfield Commercial Building A4 – Vimark House A5 – Yu Yuet Lai Building A6 – The Centrium A7 – Chancery Mansions A8 – Chancery House A9 – Cambridge Villa A10 – Sunrise House A11 – Old Bailey Street Junior Police Office Married Quarter A12 – Ho Fook Building A13 - Winning House
Relevant Criteria	Hong Kong Air Quality Objective: Daily average TSP level of 260 mg m^-3 Annual average TSP level of 80 mg m^-3 EIAO-TM: Hourly average TSP level of 500 mg m^-3	Hong Kong Air Quality Objectives: NO₂ : Hourly average of 300 mg m^-3; daily average of 150 mg m^-3; annual average of 80 mg m^-3 SO₂ : Hourly average of 800 mg m^-3; daily average of 350 mg m^-3; annual average of 80 mg m^-3 RSP : Daily average of 180 mg m^-3; annual average of 55 mg m^-3
Results of Impact	The construction of the Project involves small-scale site formation/foundation works, new building construction, refurbishment works for the existing buildings, and minor-scale demolition of existing structures. Excavation, truck movements, materials handling and wind erosion of open stockpiles of dusty materials were identified as the major dust generating activities. In view of the small size of the worksite and small quantity of excavated materials to be generated, limited excavated soil will be stockpiled on-site. No adverse fugitive dust impact is envisaged with the implementation of dust control measures and adoption of good construction site practices. Minor air quality impacts associated with gaseous emissions of diesel-powered construction plant and equipment are anticipated as only a small number of construction vehicles and plant will be operated in the limited works areas at any one time.	Gaseous emissions from kitchens are identified as potential sources of air pollutants. Electric stoves will be installed in the kitchens within the Project, and therefore no gaseous or liquid fuels will be used for cooking operations. Electrostatic precipitators (ESPs) will also be installed at the exhausts of the kitchens to capture potential particulate emissions and the location of the exhaust will be sited vertically upward and away from the nearby air sensitive uses as far as practicable. As such, potential air quality impacts associated with gaseous emissions from kitchen operations to the surroundings are not anticipated. As the design of the Project encourages visitors to get to the Site via footbridge and pedestrian crossings, traffic flow induced by operations of the Project (eg tourist bus and private cars) is anticipated to be small and no adverse cumulative traffic emission impact during the operation phase of the Project is therefore expected. Three restaurant stacks were identified within 500m Study Area. The nearest stack is located at about 70m from the Site boundary and all the stacks were identified to be at least 30m above ground with high-rise buildings located in between. Through the interview with the stack owners, one of the restaurants indicated that Towngas was used for the cooking stoves. However, the owners of the other two stacks refused to provide stack emissions information. Nonetheless, it is anticipated that both premises are using ultra low sulphur diesel (ULSD), gaseous fuel or alternative fuel types in which emissions must comply with the requirements in the Air Pollution Control (Fuel Restriction) Regulation and its amendment of 2008. The five-year average of NO₂ (54mgm^-3) and SO₂ (22mgm^-3)data from 2005 to 2009 recorded at the Central/Western AQMS demonstrated that the ambient concentrations of the respective pollutants are low. As a result, no adverse air quality impacts are anticipated for the Project.
Extents of Exceedance	Not expected.	Not expected.
Avoidance / Mitigation Measures	The following dust control measures stipulated in the Air Pollution Control (Construction Dust) Regulations and good site practices will be incorporated into the Contract Specification and implemented throughout the construction period: · The area at which demolition work takes place will be sprayed with water or dust suppression chemical immediately prior to, during and immediately after the demolition activity; · Impervious dust screen or sheeting will be implemented for demolition of structures and renovation of outer surfaces of structures that abuts or fronts open area accessible to the public to no less than 1m higher than the highest level of the structure being demolished; · An effective dust screen will be provided to enclose scaffolding, if required, from the ground floor level of building for construction of superstructure of the new buildings; · Impervious sheet will be provided for skip hoist for material transport; · Vehicle washing facilities will be provided at the designated vehicle exit points; · Every vehicle will be washed to remove any dusty materials from its chassis and wheels immediately before leaving the worksite; · Road sections between vehicle-wash areas and vehicular entrances will be paved; · The load carried by the trucks will be covered entirely to ensure no dust emission from the vehicles; · Hoarding of not less than 2.4m high from ground level will be provided along the Project Site boundary adjoining a road where the new buildings will be constructed; · The main haul road will be kept clear of dusty materials and will be sprayed with water so as to maintain the entire road surface wet at all the time; · Temporary stockpiles of dusty materials will be either covered entirely by impervious sheets; place in an area sheltered on the top and three sides; or sprayed with water to maintain the entire surface wet at all the time; · Stockpiles of more than 20 bags of cement, dry pulverised fuel ash and dusty construction materials will be covered entirely by impervious sheeting sheltered on top and 3-sides; · All exposed areas will be kept wet always to minimise dust emission; · ULSD will be used for all construction plant on-site; · The engine of the construction equipment or trucks during idling will be switched off; and · Regular maintenance of construction equipment deployed on-site will be conducted to prevent black smoke emission.	The following measures will be implemented for kitchens to minimize the potential kitchen fumes or stack emissions: · Electric stoves will be used; · Electrostatic precipitators (ESP) will be installed to control the oily fume and cooking odour; · Siting the kitchen exhausts away from the nearby air sensitive uses as far as practicable;; · Direct the kitchen exhausts vertically upwards; and · Provide sufficient separation distance from the nearby air sensitive uses.
Residual Impact	Not expected.	Not expected.
Environmental Acceptability	No adverse air quality impact with the implementation of mitigation measures.	No adverse air quality impact with the implementation of mitigation measures.
Water Quality
Assessment Points / Sensitive Receivers	· Existing stormwater drain along Old Bailey Street and box culverts along Arbuthnot Road and Hollywood Road · Victoria Harbour at about 650m from the Site · Seawater abstraction points along the seafront at about 650m from the Site	· Existing stormwater drain along Old Bailey Street and box culverts along Arbuthnot Road and Hollywood Road · Victoria Harbour at about 650m from the Site · Seawater abstraction points along the seafront at about 650m from the Site
Relevant Criteria	· Water Pollution Control Ordinance (WPCO) (Cap. 358); · Environmental Impact Assessment Ordinance (Cap. 499. S.16), Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM), Annexes 6 and 14; · Technical Memorandum Standards for Effluents Discharged into Drainage and Sewerage Systems, Inland and Inshore Waters (TM); · Practice Note for Professional Persons on Construction Site Drainage (Prop PECC PN 1/94); and · Hong Kong Planning Standards and Guidelines (HKPSG).	· Water Pollution Control Ordinance (WPCO) (Cap. 358); · Environmental Impact Assessment Ordinance (Cap. 499. S.16), Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM), Annexes 6 and 14; · Technical Memorandum Standards for Effluents Discharged into Drainage and Sewerage Systems, Inland and Inshore Waters (TM); and · Hong Kong Planning Standards and Guidelines (HKPSG).
Results of Impact	Given the scale and nature of the construction work, with the implementation of good construction and site management practices, adverse water quality due to site runoff and general construction activities is not anticipated. The amount of sewage to be generated will be about 30 m³ per day. The existing toilet facility of the CPS will be available to the construction workforce. The sewage will be discharged to the public sewer. If necessary, portable toilets will be provided on site to ensure that sewage from the site staff is properly collected. No adverse impact water quality is anticipated due to the treatment and disposal of sewage generated from the workforce.	Sewage will arise from the dinning areas, operation staff and visitors of the CPS. According to the Sewerage Impact Assessment of the Project, the proposed development will generate a peak flow of 50.25 L/s. The hydraulic analysis concluded that there is sufficient freeboard allowed in the existing 225mm diameter public sewers along Hollywood Road, Old Bailey Road and Arbuthnot Road. The existing sewers will be adequate to handle the anticipated volume of sewage to be discharged from the CPS and the adjacent developments, and no improvement to the existing sewers is required. No adverse water quality and sewerage impacts are envisaged.
Extents of Exceedance	Not expected.	Not expected.
Avoidance / Mitigation Measures	Prior to the modification works, perimeter cut-off drains to direct off-site water around the site will be constructed and internal drainage works and erosion and sedimentation control facilities implemented. Channels, earth bunds or sand bag barriers will be provided on site to direct potential contaminated runoff to the on-site slit trap before discharged to the stormwater drains. The design of any slit removal facilities will be based on the guidelines in Appendix A1 of ProPECC PN 1/94. Vehicle and plant servicing areas, vehicle washing bays and lubrication bays will, as far as possible, be located within roofed areas. The drainage in these covered areas will be connected to foul sewers via a petrol interceptor. Oil leakage or spillage will be contained and cleaned up immediately. Waste oil will be collected and stored for recycling or disposal, in accordance with the Waste Disposal Ordinance. The stomwater discharge from the Site will be monitored as part of the routine monitoring under the WPCO licence, if applicable. The existing toilet facilities of the CPS will be available to the construction workforce. The sewage will be discharged to the public sewer system.	Not required.
Residual Impact	No residual impact.	No residual impact.
Environmental Acceptability	No adverse water quality impact with the implementation of good site practices and mitigation measures.	No adverse water quality impact is expected.
Waste
Assessment Points / Sensitive Receivers	CPS	CPS
Relevant Criteria	· Waste Disposal Ordinance (Cap 354); · Waste Disposal (Chemical Waste) (General) Regulation (Cap 354C); · Land (Miscellaneous Provisions) Ordinance (Cap 28); and · Public Health and Municipal Services Ordinance (Cap 132) - Public Cleansing and Prevention of Nuisances Regulation · Hong Kong Planning Standards and Guidelines · Waste Reduction Framework Plan, 1998 to 2007 · Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes (1992) · WBTC No. 32/92, 2/93, 2/93B, 25/99, 25/99A, 25/99C, 12/2000, 12/2002 · ETWBTC No. 33/2002, 19/2005 · DevBTC No. 6/2010	· Waste Disposal Ordinance (Cap 354); · Waste Disposal (Chemical Waste) (General) Regulation (Cap 354C); · Land (Miscellaneous Provisions) Ordinance (Cap 28); and · Public Health and Municipal Services Ordinance (Cap 132) - Public Cleansing and Prevention of Nuisances Regulation · Hong Kong Planning Standards and Guidelines · Waste Reduction Framework Plan, 1998 to 2007 · Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes (1992)
Results of Impact	It is estimated that 12,900 m³ of excavated materials, 3,540 m³ of public fills and 890 m³ of construction waste will be generated during the construction phase. With respect to the scale of the construction activities, it is anticipated that the quantity of chemical waste to be generated will be small (less than a hundred litres per month during the construction phase). It is also estimated that about 130 kg of general refuse will be generated per day by the construction workers.	It is estimated that general refuse (9,250 kg per day) and food waste (460 kg per day) will be generated during the operation phase.
Extents of Exceedance	N/A	N/A
Avoidance / Mitigation Measures	C&D Material will be segregated on-site into inert and non-inert materials and stored in different containers or skips to facilitate reuse of the inert materials and proper disposal of the non-inert construction waste. Specific areas of the work site will be designated for such segregation and storage if immediate use is not practicable. The contractor will register as a chemical waste producer with the EPD. Chemical waste will be handled in accordance with the Code of Practice on the Packaging, Handling and Storage of Chemical Wastes. General refuse will be stored in enclosed bins separately from construction and chemical wastes. The general refuse will be delivered to the transfer station or landfill, separately from construction and chemical wastes, on a daily basis to reduce odour, pest and litter impacts. Recycling bins will be provided at strategic locations to facilitate recovery of aluminium can and waste paper from the Site. Materials recovered will be sold for recycling. At the commencement of the construction works, training will be provided to workers on the concepts of site cleanliness and on appropriate waste management procedures, including waste reduction, reuse and recycling.	Chemical waste will be handled in accordance with the Code of Practice on the Packaging, Handling and Storage of Chemical Wastes. General refuse and food and beverage waste will be stored in enclosed bins and disposed of at the tipping area on a daily basis to reduce odour, pest and litter impacts. Recycling bins will be provided at strategic locations to facilitate recovery of aluminium can and waste paper from the Site. Materials recovered will be sold for recycling
Residual Impact	No residual impact	No residual impact
Environmental Acceptability	No adverse environmental impact associated with the handling and disposal of waste.	No adverse environmental impact associated with the handling and disposal of waste.

Parameters	Construction Phase ^(a)	Operation Phase ^(a)
Cultural Heritage	M + SA	SA
Landscape and Visual	M + SA	M
Noise	M + SA	M^(b)
Air Quality	SA	-
Water Quality	SA	-
Waste	SA	-
Note: (a) M = monitoring, SA = site audit (b) Monitoring will be required for outdoor events only and will be implemented through contract requirement for the event organisers.

([1]) Purcell Miller Tritton (2008) The Old Central Police Station and the Victoria Prison Conservation Management Plan.