(CE) Planning and Engineering Study on Future Land Use at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile

Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile

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This report takes into account the particular Ove Arup & Partners Hong Kong Limited instructions and requirements of our client. Level 5 Festival Walk It is not intended for and should not be relied 80 Tat Chee Avenue upon by any third party and no responsibility Kowloon Tong is undertaken to any third party. Kowloon Hong Kong www.arup.com Job number 219753

Planning Department and Civil Engineering and Development Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use Department at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile

Contents

Page

1 Project Background 1 1.1 Project Title 1 1.2 Purpose and Nature of Project 1 1.3 Name of Project Proponent 1 1.4 Location and Scale of Project and History of Site 2 1.5 Number and Types of Designated Projects to be Covered by the Project Profile 5 1.6 Name and Telephone Number of Contact Person 6

2 Outline of Planning and Implementation Programme 7 2.1 Project Implementation 7 2.2 Project Time-Table 7 2.3 Interactions with Other Projects 7

3 Possible Impacts on the Environment 9 3.1 General 9 3.2 Air Quality 9 3.3 Noise 9 3.4 Water Quality 9 3.5 Waste 10 3.6 Land Contamination 10 3.7 Ecology 11 3.8 Fisheries 12 3.9 Cultural Heritage 12 3.10 Landscape and Visual 12

4 Major Elements of the Surrounding Environment 14 4.1 Existing Environment 14

5 Environmental Protection Measures to be Incorporated in the Design and Any Further Environmental Implications 17 5.1 General 17 5.2 Air Quality 17 5.3 Noise 18 5.4 Water Quality 19 5.5 Waste 20 5.6 Land Contamination 22 5.7 Ecology 22 5.8 Fisheries 22

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5.9 Cultural Heritage 23 5.10 Landscape and Visual 23 5.11 Severity, Distribution and Duration of Environmental Effects and Further Implications 25

6 Use Of Previously Approved EIA Reports 26

Figures

Figure 1.1 Study Area, Study Site and Proposed Works Area

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Planning Department and Civil Engineering and Agreement No. CE 33/2011 (CE) Planning and Engineering Study on Future Land Use at Ex- Development Department Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study Revised Project Profile

1 Project Background

1.1 Project Title 1.1.1 Planning and Engineering Study on Future Land Use at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study (the Project).

1.2 Purpose and Nature of Project 1.2.1 In 2002, the Planning and Development Study on Hong Kong Island South and Lamma Island (HKIS & LI Study) was commissioned by the Planning Department (PlanD) and the ex-Territory Development Department (Civil Engineering and Development Department (CEDD) today). The HKIS & LI Study remarked that given the limited residential development opportunities in other parts of Lamma Island, the residential development potential of the Ex-Lamma Quarry Area at Sok Kwu Wan (Study Site) may be considered on its future land use. 1.2.2 PlanD and CEDD of the Government then commissioned the Planning and Engineering Study on Future Land Use at Ex-Lamma Quarry Area at Sok Kwu Wan, Lamma Island – Feasibility Study in early 2012 to examine the future land use and explore the development potential of the Study Site, as well as the impacts of the proposed developments on the surrounding areas and adjacent water areas. The findings and recommendations of the Project will serve as a reference for the preparation and revision of the relevant town plans to guide the future development of the Study Site, and provide the basis for further engineering investigation and detailed design for the implementation of necessary infrastructure works. An Environmental Impact Assessment (EIA) which is the subject of the revised Project Profile is within the scope of the Project. 1.2.3 The Project comprises tourist and recreational facilities accompanied by housing developments in the Study Site. Supporting infrastructure including refuse transfer facility, sewage treatment works, ferry and refuse transfer piers, submarine sewage outfall, etc. will be provided within the Study Site and the works areas identified in the Study Area. 1.2.4 In the course of the study, requirements for additional works areas to accommodate these supporting infrastructures have been identified beyond the original Study Area. The revised Study Area is shown in Figure 1.1.

1.3 Name of Project Proponent 1.3.1 The Project Proponent is Hong Kong Island and Islands Development Office (HKI&I DevO), Civil Engineering and Development

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Department (CEDD) of the Government of the Hong Kong Special Administrative Region (Government).

1.4 Location and Scale of Project and History of Site 1.4.1 The Study Site is located at the Ex-Lamma Quarry (ELQ) on the northern coast of Sok Kwu Wan. It was established in 1978 for rock extraction and miscellaneous processing and storage use. After years of operation, it was left with steep rock faces that scarred the landscape of the area. 1.4.2 In 1995, the Government endorsed the findings of Rehabilitation of Lamma Quarry Planning and Engineering Study (the Rehabilitation Study) conducted by Geotechnical Engineering Office (GEO) of the Civil Engineering Department, i.e. adopting the recreational land use as the preferred land use option and the Master Landscape Plan so formulated for rehabilitation. Although the option for recreational land use was adopted, it is identified in the Rehabilitation Study that the adoption of the preferred option does not preclude future modification for residential cum recreational uses, of which low density residential development would be kept at the base of the northern slopes and on the northern platforms. 1.4.3 The rehabilitation contract of the Rehabilitation Study for the Study Site was completed in December 2002. The following works were carried out under the contract: a. Formation of a new landform comprising a broad, gently sloping series of platforms bounded to the north with slopes which merge with the natural hillsides. b. Formation of a 5-hectare man-made lake with a natural, non- engineered appearance and gently shelving edges which can support reed bed. c. Landscaping and planting of exotic and native trees to create a self-sustaining, maintenance free, green environment with a similar biodiversity to the surroundings. 1.4.4 In May 2011, the Study Site was put under Short Term Tenancy (STT) to Young Men Christian Association (YMCA) for a non-profit making environmental education and wild life learning centre for a period of 3 years certain and thereafter quarterly. The 5-hectare man- made lake remains in the middle of the Study Site. It connects with some small ponds and discharges into the sea via a spillway at eastern end of the Study Site. At the south western end of the Study Site, there locates a mass concrete pier, which is some 500m to the northwest of Sok Kwu Wan Pier No. 2. The existing geological condition is mainly granite and reclamation. 1.4.5 Currently, the Study Site is covered by the approved Lamma Island OZP No. S/I-LI/9 and is zoned “Undetermined” pending detailed consideration of the appropriate uses. It covers an area of about 34.3 hectares with about 1 km of coastline.

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1.4.6 In order to take into account the future developments in the Comprehensive Development Area (CDA) site (southwest of the Study Site) and to ensure the natural hazard and ecological values of the adjacent slopes (north of the Study Site) are properly considered, a larger area, the “Study Area” is included for the Study. 1.4.7 The Study Area, with a total area of 59.9 hectares, falls under the approved Lamma Island Outline Zoning Plan No. S/I-LI/9. It contains the Study Site (zoned “Undetermined”), the adjacent CDA site, “Green Belt” and “Coastal Protection Area” zones. The Study Area is bounded by slopes at the northeast and the coastline at the southeast. 1.4.8 Within the CDA site, an existing cement storage being managed by Hong Kong Nihon Cement Company Limited is located. In addition, a conveyor belt system connects the silos to a private pier to the south of the CDA site. 1.4.9 The current proposed development will be located within this Study Site. Additional works areas within the Study Area are required for locating the supporting infrastructures. 1.4.10 In conjunction with the considerations of the public views and comments collected during the Stage 1 Community Engagement, and along with further findings and requirements upon studying the future development in greater detail, the basis for the Preferred Option and Preliminary Outline Development Plan was formed. 1.4.11 Revolving around a tourism and residential development theme, the vision for the Preferred Option is to foster the tourism and recreational opportunities while providing additional private and subsidised housing to the area. Meanwhile, the provision of community facilities and economic opportunities will also be sought to meet local expectations and needs. A green and sustainable environment is strived for, and the linkages within the ELQ development as well as to the other parts of Lamma Island and Hong Kong Island would be enhanced. 1.4.12 Through the addition of a wide range of tourist and recreational facilities accompanied by housing developments, the plan will likely comprise areas of housing development (for private housing and subsidised housing), resort hotel development, commercial facilities, recreational facilities (an Outdoor Recreation Centre and a Water Sport Centre), G/IC facilities (include a refuse collection point (RCP), refuse transfer facility (RTF), a fire station, library, police post, and social welfare facilities), open space, green belt, roads and amenity areas. 1.4.13 As there are currently no basic infrastructure and utility facilities within the Study Site, supporting infrastructure requirements are being devised and will potentially include the following provisions. 1.4.14 An electricity cable tunnel of over 2 km is proposed to be extended from Yung Shue Wan. The future development will be served by a set of 132kV power cables from the existing Lamma Power Station via

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the existing Lamma – Ap Lei Chau 275 kV cable route, and the construction of a new 132 kV electricity substation (ESS) in the Study Site. The cables will be routed through the proposed cable tunnel from Yung Shue Wan to the ESS. 1.4.15 The Project will propose to upgrade the existing trunk mains and pumping station as well as provide new distribution mains to supply fresh water from the existing Lamma Island Fresh Water Service Reservoir to the Study Site. 1.4.16 No new gas main would be provided to the proposed development in the near future, alternative options between the use of electricity as energy supply or provision of LPG Cylinder Stores for the Study Site are being considered. 1.4.17 Two drainage outfalls which will be located more than 300m away from the nearest Sok Kwu Wan fish culture zone are proposed to serve the future development. Alternatively, in order to maintain the water level of the man-made lake for recreational use, it is considered to convey all the surface runoff to the lake for replenishing the water level of the man-made lake. 1.4.18 A refuse transfer facility (RTF) will be required within the future development for the collection, compaction and transfer of household waste arising from the Study Site and proposed developments. 1.4.19 A sewage treatment works (STW) with installed capacity to meet the population requirements in the development will be required for the collection, treatment and disposal of sewage arising. Effluent from the STW will be discharged to deep sea through a submarine outfall that will be extended underneath the hillslopes to the northeast of the site. Dredging is required for the outfall diffusers, while Horizontal Directional Drilling (HDD) will be applied for the construction of submarine outfall. A sewage pumping station is also required. 1.4.20 A new ferry pier and refuse transfer facility (RTF) pier as well as two landing steps are proposed to be extended from the existing seawall for external transport provisions to the Study Site. Only piling works/ rock removal work will be required for RTF pier, new ferry pier and landing steps. 1.4.21 A number of sites are proposed as open space to provide recreational and leisure space serving future residents and general public. Lakeside Park and Woodland Park are proposed linking to the man-made lake and the mountain backdrop of the Study Site. A waterfront promenade with pedestrian walkway and cycle track stretching from west to east across the majority of the Study Site will serve as the primary green spine. Open space will also be provided around the man-made lake to promote public enjoyment. 1.4.22 The existing cement storage is a private site and zoned as CDA site. According to the approved Lamma Island Outline Zoning Plan No. S/I-LI/9, an environmental assessment is required by the future developer prior to its development and therefore the assessment of

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future land use of this CDA site is excluded from the Project. No construction works is proposed within the CDA under this Project. 1.4.23 The project activities will occur only on the Study Site for development and works area for infrastructure provisions. Other areas of the Study Area will not have any construction activities.

1.5 Number and Types of Designated Projects to be Covered by the Project Profile 1.5.1 The Project involves a planning and engineering feasibility study about 34.3 hectares of Study Site. Therefore it falls within Item 1 of Schedule 3 of the Environmental Impact Assessment Ordinance (EIAO), i.e. "Engineering feasibility study of urban development projects with a study area covering more than 20 hectares or involving a total population of more than 100 000.”. The Project is a Designated Project requiring an EIA report. 1.5.2 The Project also consists of various Schedule 2 Designated Projects under the EIAO that may be proposed in the course of the Project as follows: i. Possible construction of sewage treatment works [under Schedule 2, Part I, F.2(a)]; ii. Possible construction of sewage pumping station [under Schedule 2, Part I, F.3(b)]; iii. Possible construction of submarine sewage outfall [under Schedule 2, Part I, F.6]; iv. Possible construction of refuse transfer station [under Schedule 2, Part I, G.2]. 1.5.3 Moreover, the two DPs identified in previous EIA Study Brief No. ESB-232/2011 are no longer project elements constituting a DP. They are: i. A dredging operation which is less than 500m from the nearest boundary of an existing fish culture zone [under Schedule 2, Part I, C.12(a)] – The dredging operation will be more than 1km from the nearest boundary of Sok Kwu Wan and Lo Tik Wan Fish Culture Zones; ii. A drainage channel or river training and diversion works which discharges or discharge into an area which is less than 300m from the nearest boundary of an existing fish culture zone [under Schedule 2, Part I, I.13(b)] – The drainage discharge will be more than 300m from the nearest boundary of Sok Kwu Wan Fish Culture Zone.

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1.6 Name and Telephone Number of Contact Person 1.6.1 All queries regarding the Project can be addressed to: Mr. David K. C. LO (Chief Engineer/Islands) Hong Kong Island and Islands Development Office, CEDD 13/F., North Point Government Offices 333 Java Road North Point Hong Kong Tel. 2231 4443 Fax. 2577 5040

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2 Outline of Planning and Implementation Programme

2.1 Project Implementation 2.1.1 On completion of the P&E Study, it is proposed to implement the Project by employing consultants to undertake the detailed design, tender and supervision of construction phase of the Project in the later stages. 2.1.2 The construction works of the proposed land formation and infrastructure works to serve the Project will be carried out by contractors to be appointed under various works contracts. 2.1.3 Land disposal will follow afterward for development.

2.2 Project Time-Table 2.2.1 The outline implementation programme of the development and infrastructure will be determined in the P&E Study, while detailed design of the development and infrastructure will be conducted in the later stage.

2.3 Interactions with Other Projects 2.3.1 Potential projects that would have interface with the Project have been identified and are listed below. This list will be revisited during the EIA study to ensure all the latest projects identified with the respective stakeholders are considered. Any cumulative impacts from these concurrent projects during both construction and operational phases of the Project will be identified and assessed accordingly. Table 2.1 shows the preliminary list of concurrent projects.

Table 2.1 List of concurrent projects Agreement Project Project Title No. Proponent CE 43/2005 DSD Harbour Area Treatment Scheme (HATS) Stage (EP) 2A CE 63/2008 CEDD Providing Sufficient Water Depth for Kwai (CE) Tsing Container Basin and its Approach Channel N/A The Baroque The Baroque on Lamma on Lamma Limited N/A Hong Kong Development of a 100MW Offshore Wind Farm Electric in Hong Kong CE 20/2005 DSD Outlying Islands sewerage stage 1 phase 1 part (DS) 2 and phase 2- Yung Shue Wan and Sok Kwu

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Agreement Project Project Title No. Proponent Wan sewerage, sewage treatment and disposal – Design and Construction

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3 Possible Impacts on the Environment

3.1 General 3.1.1 All the prevailing legislative requirements would be considered in the EIA to assess the possible environmental impacts.

3.2 Air Quality Construction Phase 3.2.1 During construction, dust is a potential air quality impact which would be generated from construction activities such as material handling, excavation, vehicle movement, erosion of unpaved area and stockpiles.

Operational Phase 3.2.2 During operation, the major sources of emissions would be village vehicles within the development (if any), refuse transfer facility services vehicles, marine vessels emission, and potential odour from on-site sewage treatment works and pumping station, refuse transfer facility and refuse collection point.

3.3 Noise Construction Phase 3.3.1 During construction, the source of potential noise nuisance is primarily from the use of powered mechanical equipment on site. The construction activities will involve the use of plant for site formation, excavation, slope works/ earth works, road works, utilities installation and infrastructure etc.

Operational Phase 3.3.2 The future noise sources arising from the Project include road traffic noise from village vehicles (if any), refuse transfer facility services vehicles and other fixed noise sources such as potential electricity substation, refuse transfer facility, sewage treatment work, sewage pumping station and marine vessels.

3.4 Water Quality Construction Phase 3.4.1 Potential water pollution sources during the construction phase include site runoff during the following typical works activity:  Runoff and erosion from site surfaces, earth working areas and stockpiles;

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 Wash water from dust suppression sprays and wheel washing facilities; and  Fuel, oil, solvents and lubricants from maintenance of construction machinery and equipment. 3.4.2 Sewage effluents will arise from the sanitary facilities provided for the on-site construction workforce. Portable chemical toilets and sewage holding tanks would be provided. 3.4.3 Sediment released due to the potential dredging works for the construction of submarine diffuser; modification of existing seawall/ pier may affect the water sensitive receivers including the Sok Kwu Wan and Lo Tik Wan Fish Culture Zones.

Operational Phase 3.4.4 The implications of nutrient loading from storm discharges, and domestic loading on the sewage treatment works and the capacity of the proposed submarine outfall will be considered. The capacity of the sewerage network (including local sewers and pumping stations) and the sewage treatment plant will be assessed.

3.5 Waste Construction Phase 3.5.1 Solid wastes are mainly generated from a wide range of construction activities such as site formation, construction of roads and drains, and construction of the proposed development and infrastructure. The wastes arising from construction will consist of excavated and demolished C&D materials during earthworks, chemical waste, and general refuse. The quantities of wastes to be generated during construction largely depend on the programmes of various works packages requiring off-site disposal.

Operational Phase 3.5.2 The operation of the proposed development and associated infrastructure will generate municipal solid waste. The storage and handling of this waste have the potential to cause adverse environment impact.

3.6 Land Contamination 3.6.1 Given the previous land uses before 1990s were involved with the quarry operation making use of casting basin and yard, cement silos and rock crushing plant. There is potential for land contamination. 3.6.2 Contamination assessment would be conducted to assess the potential contamination issues within the Proposed Works Area and the Study Site where construction activities would take place.

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3.7 Ecology 3.7.1 All habitats within the Study Site are man-made, except for an area of hard rocky shore, and are common in Hong Kong, and are largely the result of the rehabilitation contract for the ex-Lamma Quarry that commenced in 1995 and was completed in 2002. Ten landscape rehabilitation zones were created within the Master Landscape Plan to address the planting required for the Slope Areas and the Platform Areas. An additional “area’ was incorporated into the Master Layout Plan for the creation of a specific wildlife habitat for falcon nesting. 3.7.2 There are two Sites of Special Scientific Interests (SSSIs) on Lamma Island, including the South Lamma Island which was designated as a SSSI in 1980 aiming to protect the habitat of unusual bird species like White-bellied Sea Eagle Haliaeetus leucogaster and Bonelli’s Eagle Hieraaetus fasciatus near Mount Stenhouse; and Sham Wan which was designated as a SSSI in 1999 aiming to protect the breeding site of Green Turtle Chelonia mydas. 3.7.3 Although these two SSSIs are at least 1km (the South Lamma SSSI) and 2km (Sham Wan SSSI) from the Study Site, any off-site disturbance impacts resulting from the Project to these SSSIs will be fully investigated. 3.7.4 The potential terrestrial impact arising from the Project will be associated with: Construction Phase (i) Direct loss of habitats due to construction activities, including dredging, excavation works, access road, tree and slope cutting and other associated works of the Project; (ii) Potential destruction to habitats of ecological significance, e.g., woodland and falcon nests on cliff face; (iii) changes in water qualities, hydrodynamics properties in natural stream courses and associated riparian habitats, freshwater lakes / ponds and marine water bodies, hydrology; and (iv) accidental discharge of untreated sewage. Operational Phase (i) Physical disturbance (mortality) of marine mammals by increased marine traffic; (ii) Impacts and physical disturbance due to increased levels and change of pattern on marine traffic during construction and operational phases; (iii) Disturbance to wildlife due to increased human activities; and (iv) Disturbance to wildlife and vegetation due to possible air pollution, water pollution and noise.

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3.8 Fisheries 3.8.1 There are two Fish Culture Zones (FCZs), namely Sok Kwu Wan FCZ and Lo Tik Wan FCZ, identified in the vicinity of the Project. Construction Phase 3.8.2 The potential impacts on fisheries activities and resources at the sensitive receivers could be caused by dredging works for submarine diffuser and modification of existing seawall/ pier in the form of direct habitat loss or indirect disturbance impacts.

Operational Phase 3.8.3 The potential impacts on fisheries activities and resources at the sensitive receivers could be caused by the possible increase in marine traffic.

3.9 Cultural Heritage Construction Phase 3.9.1 Cultural heritage sensitive receivers have been identified. Potential impacts, both direct and indirect, and their physical extent, on heritage resources arising from the proposed Project during the construction phase would be identified. Direct impacts are direct loss, destruction or disturbance in whole or in part of the cultural heritage permanently or temporarily due to the proposed construction works and potential damage to the physical fabric of archaeological remains, historic buildings or historic landscapes through air pollution. Preservation in totality would be taken as the first priority in the assessment of such impacts.

Operational Phase 3.9.2 There are no historical buildings, temples, shrines nor Fung Shui elements in the Study Area. Direct and indirect cultural heritage impacts during the operational phase are not expected.

3.10 Landscape and Visual 3.10.1 The expected sources of landscape and visual impacts arising from the Project would include, but not limited to, the following: Construction Phase (i) Loss of landscape elements, e.g. woodland, trees, small ponds and natural topography; (ii) Loss of visual amenity through removal of landscape elements e.g. trees; (iii) Visual appearance of any temporary use prior to the new development; (iv) Construction activities on the existing available land; and

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(v) Obstruction of or intrusion into views by the new development. Operational Phase (i) Visual intrusion and obstruction created by the new development; (ii) Visual quality of the new development; (iii) Landscape impact arising from road works and related infrastructure facilities; and (iv) Permanent loss of landscape and visual amenity of natural environment due to the new development.

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4 Major Elements of the Surrounding Environment

4.1 Existing Environment 4.1.1 Currently, the Study Site is covered by extensive vegetation with exotic and native plants scattered across the site, creating a self- sustaining green environment. A broad and gently sloping series of platforms bounded to the north with slope created under the rehabilitation program is merged with the natural hillsides. 4.1.2 To the north of the Study Site is surrounded by an area with extensive coverage of greenery which is currently zoned as “GB” on the Lamma Island OZP No. S/I-LI/9. The Lamma Island Youth Hostel and a memorial garden are located further north to the Site inside the “GB” zone. The closest recognised village, Luk Chau Village, is located approximately 100 metres from the northwest boundary of the Study Area. Air Quality 4.1.3 The surrounding area of the Project is mainly dominated by rural villages with a cement storage area located at the southwest of the Study Site. There are no roads within the Study Area but marine emission from the ferry services is the primary source of air pollution. In addition, the HEC Lamma Power Plant is located at some 1km away. Noise 4.1.4 The noise climate is rural in nature and dominated by village type community noise, marine noise from vessels commuting in the vicinity of the Study Site. Water Quality 4.1.5 A 5 hectare man-made lake with a natural, non-engineered appearance and gently shelving edge together with 4 associated ponds formed part of the rehabilitation work within the Study Site. The overflow from the lake is spilled over to the sea via a spillage located to the east of the lake. Waste 4.1.6 The existing solid wastes arising from within the Study Area including the general refuse arising from staff at the cement storage area and people visiting YMCA recreational facilities. Land Contamination 4.1.7 The Study Site is used by YMCA for recreational purposes. No special land use or activity was observed that may have the potential for causing soil and groundwater contamination. However, as revealed from the historical aerial photographs, part of the quarry site was found to have rock crushing and screening plant, cement silos and casting basing and yard with the potential of land contamination.

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Ecology 4.1.8 All habitats within the Study Site are man-made, except for an area of hard rocky shore, and are common in Hong Kong, and are largely the result of the rehabilitation contract for the ex-Lamma Quarry that commenced in 1995 and was completed in 2002. Ten landscape rehabilitation zones were created within the Master Landscape Plan to address the planting required for the Slope Areas and the Platform Areas. An additional “area’ was incorporated into the Master Layout Plan for the creation of a specific wildlife habitat for falcon nesting. Fisheries 4.1.9 Sok Kwu Wan and Lo Tik Wan are the two gazetted Fish Culture Zones (FCZs) close to the ELQ site. The two FCZs also support recreational fishing activities. Landscape and Visual 4.1.10 The rehabilitation plan has produced a largely green hillside that surrounds much of the Study Site at its borders. On the flatter ground, while there are some tree patches, the landscape is mainly grassland/ scrubland and a large lake is a notable feature in the centre of this. Cultural Heritage 4.1.11 There are two Sites of Archaeological Interest which have been recorded within the 300m of the Study Area which includes Lo So Shing (蘆鬚城) and Sha Long Wan (Tit Sha Long) (砂塱灣(鐵砂塱)). Beyond the Study Area (within 1km) there are two Sites of Archaeological Interest: Lo Ah Tsai Stone Circle (老鴉仔石圓環) and the Mo Tat Wan (模達灣). Sensitive Receivers 4.1.12 The existing environment of the site and its surroundings has been reviewed above. The key existing sensitive receivers are listed in Table 4.1. The list will be expanded to include other sensitive receivers to be identified during the EIA study. Table 4.1 Sensitive receivers of the Project Item Description

Air Sensitive Receivers (ASRs) Luk Chau Village Lo So Shing

Lamma Island Youth Hostel Sok Kwu Wan

Noise Sensitive Receivers Luk Chau Village (NSRs) Lo So Shing

Lamma Island Youth Hostel Sok Kwu Wan

Water Sensitive Receivers Fish Culture Zone

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Item Description (WSRs) Lake and pond

Conservation area Coastal Protection Area

Coral at Luk Chau Ap Lei Chau WSD Seawater Intake

Wah Fu Estate Seawater Intake Coral at Pak Kok

Ecology Sensitive Receivers Romer’s Tree Frogs

Black Kite Protected tree species such as Aquliaria sinensis

Fisheries Sok Kwu Wan Fish Culture Zone Lo Tik Wan Fish Culture Zone

Cultural Heritage Lo So Shing Site of Archaeological Interest

Sha Long Wan Site of Archaeological Interest

Lo Ah Tsai Stone Circle Mo Ta Wan Site

Pak Kok Tsui Landscape Character Area Former Sok Kwu Wan Quarry Coastal Landscape (LCAs) North Lamma Coastal Uplands Landscape Sok Kwu Wan Coastal Bay Landscape Visual Sensitive Receivers Lo So Shing (VSRs) Ta Shui Wan Sok Kwu Wan

4.1.13 The cement storage area is zoned as CDA site according to the Lamma Island OZP No. S/I-LI/9. However, at the time of preparing this Revised Project Profile, no planning application on the development of this CDA has been submitted. Hence, the future environment of the Study Site would regard the cement storage area to remain unless there is planning application approved during the EIA Study.

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5 Environmental Protection Measures to be Incorporated in the Design and Any Further Environmental Implications

5.1 General 5.1.1 The EIA study will assess potential environmental impacts (both cumulative impacts and those arising from the Project) and propose appropriate mitigation measures with the intention that all works recommended by the Project would be environmentally acceptable and cost effective. Reference would be made to the relevant legislation and other requirements including but not limited to the EIAO and HKPSG etc. The residual impacts, if any, would be confined to within allowable limits. Environmental monitoring and auditing of potential impacts that may arise from the implementation of the works will be provided for the construction and operational phases. Subject to the findings of the EIA study, the following mitigation measures would be incorporated in the design, construction and operation of the Project.

5.2 Air Quality Construction Phase 5.2.1 In order to prevent adverse impacts on air quality, the control measures stipulated in the Air Pollution Control (Construction Dust) Regulations would be implemented wherever applicable to limit the dust emissions from the site. Subject to investigation, the following mitigation measures will be considered during the construction period to minimize impacts on air quality on nearby ASRs. (i) Stockpiles of dusty material will not extend beyond site boundaries; (ii) In the process of material handling, any material which has the potential to create dust will be treated with water or sprayed with a wetting agent where practicable; (iii) Stockpiles of sand and aggregate will be enclosed on three sides and water sprays will be used to dampen stored materials and when receiving raw material; (iv) The site will be frequently cleaned and watered to minimise fugitive dust emissions; and (v) Motorised vehicles on the site will be restricted to a maximum speed of 15 km/hr and shall be confined to designated haul routes which will be paved or surfaced with hardcore.

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Operational Phase 5.2.2 Subject to investigation, the proposed mitigation measures to improve the air quality within the possible developments and infrastructure are to be considered as follows:  Adequate buffer distance is recommended to separate the ASRs and emission sources.  Odour control from possible sewage treatment works, sewage pumping stations, refuse collection point and refuse transfer facility for the developments will include:- a. design to be in accordance with DSD's Standard Design on Sewage Pumping Station, with all pumps located underground and enclosed within a structure/building; b. covering the effluent channels of preliminary treatment facilities and sludge treatment facilities; c. deodorization system to be installed with good housekeeping practice adopted; and d. identification of appropriate mitigation measures for prevention of septicity of sewage due to the operation of any proposed sewage pumping station and the associated rising mains which might cause odour nuisance to the public.

5.3 Noise Construction Noise 5.3.1 Subject to investigation, the following measures will be considered during construction period to minimize construction noise impacts on nearby NSRs.  Plant operated on site should be well maintained and serviced regularly.  Subject to such working constraints as power supply, safety and obstruction of proposed works, mobile plant will be sited as far away from the nearby NSRs as practicable.  Noise activities will be planned and scheduled to be undertaken during appropriate time periods to minimise potential noise impacts at nearby NSRs. Noisy construction activities will be scheduled to take place at noise-tolerant time periods (e.g. lunch time).  Materials stockpiles and other massive structures (such as temporary site offices) will be effectively utilised, where possible, to screen noise from construction activities.  Noisy plant or processes will be replaced by quieter alternatives where possible. Silencers or mufflers on construction equipment should be utilised and be properly maintained during the construction works.

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 Where necessary, temporary and movable noise barriers and enclosures will be employed to minimise noise impact to NSRs.

Operational Phase 5.3.2 For the potential impacts arising from the refuse transfer facility services vehicles, fixed noise and marine vessels noise, the following mitigation measures would be considered.  Proper arrangement of landuses and the use of special building design.  Provisions for careful siting of noisy machinery within the site; by enclosing the noisy machinery within building structures; by use of acoustic louver or silencer for ventilating fan, acoustic door and absorptive wall lining will be considered.

5.4 Water Quality Construction Phase 5.4.1 In order to prevent adverse water quality impacts, the following general mitigation measures would be put in place.  Surface run-off from the construction sites will be directed into storm drains via adequately designed wastewater treatment facilities such as sand traps, silt traps and sediment basins. Channels, earth bunds or sand bag barriers will be provided on site to properly direct stormwater to such facilities;  Silt removal facilities, channels and manholes will be maintained and the deposited silt and grit will be removed regularly, at the onset of and after each rainstorm to ensure that these facilities are functioning properly at all times.  Open stockpiles of materials on site will be avoided or where unavoidable covered with tarpaulin or similar fabric during rainstorms. Measures will be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system.  Manholes (including any newly constructed ones) will always be adequately covered and temporarily sealed so as to prevent silt, construction materials or debris from getting into the drainage system.  Where possible, works entailing soil excavation will be minimised during the rainy season (April to September).  Final earthworks surfaces will be well compacted and hydroseeding following completion to prevent erosion.  All vehicles and plant will be cleaned before they leave the construction site to ensure that no earth, sediments or debris is deposited by them on roads.

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 During construction works, proper toilets will be provided for the use of site staff. A licensed contractor will be responsible for appropriate disposal and maintenance of the effluent.  All fuel tanks and chemical storage will be sited on sealed areas and provided with locks. The storage areas shall be surrounded by bunds with a capacity equal to 110% of the storage capacity of the largest tank to prevent spilled oil, fuel and chemicals from reaching the receiving waters. Drainage from oil filing points and any areas where fuels and lubricants are used will be connected to storm drains via a petrol interceptor.  Dredging works will be avoided or minimized. Should dredging works be required, assessment of the sediments in compliance with the Dumping at Sea Ordinance will be needed. Operational Phase 5.4.2 The following general mitigation measures would be considered during further assessment of potential water quality impact:  Provision of sand/silt and oil/grease traps at suitable locations to prevent ingress of pollutants to the stormwater system;  Construction of drainage works to prevent increased risk of flooding;  Construction of sewerage system to ensure proper discharge of sewage effluent flows from the developments; and  Provision of suitable measures to minimise the risk of emergency discharges of untreated sewage effluent and to ensure timely repair.

5.5 Waste Construction Phase 5.5.1 The construction work including site formation, construction of roads and drainage, construction of developments and associated infrastructures will generate C&D materials. Other than C&D materials, solid waste such as C&D waste, chemical waste, general refuse etc. would also be generated. 5.5.2 As the developments and infrastructure may require the import of fill material, the inert C&D materials would be considered for reuse. The following measures would be considered to reduce the quantities of C&D materials for disposal off site:  Use waste haulier authorised or licensed to collect specific category of waste;  Waste haulier should obtain the necessary registration and licences under the Waste Disposal Ordinance and the Waste Disposal (Chemical Waste) (General) Regulation from the Environmental Protection Department;

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 Nomination of an approved person, such as site manager, to be responsible for good site practice, arrangements for collection and effective disposal to an appropriate facility, of all waste generated at the site;  Separation of chemical wastes for special handling and appropriate treatment at a licensed facility;  A recording system for the amount of wastes generated, recycled and disposed of (including the disposal sites);  In order to monitor the disposal of C&D material and solid wastes at public filling facilities and landfills, and control fly- tipping, a trip-ticket system shall be implemented by the Contractor, in accordance with the contract and the requirements of ETWB TC(W) No. 31/2004 "Trip Ticket System for Disposal of Construction and Demolition Material";  A Waste Management Plan (WMP) shall be prepared and this WMP shall be submitted to the Engineer for approval. The WMP will be in accordance with ETWB TC(W) No. 19/2005 "Environmental Management on Construction Sites";  Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse of recycling of materials and their proper disposal;  Any unused chemicals or those with remaining functional capacity shall be recycled;  Use of reusable non-timber formwork to reduce the amount of C&D material; and  Proper storage and site practices to minimise the potential for damage or contamination of construction materials.

Operational Phase 5.5.3 The following mitigation measures are to be considered:  The containment, storage and delivery of the sewage sludge should be enclosed.  Odour removal facilities should also be installed to minimise the potential air quality impacts to any sensitive receivers.  General refuse should be collected from lidded bins and delivered to a central collection point and should be stored in enclosed containers to prevent odour, windblown litter, vermin, water pollution and visual impact.  Removal of recyclables should be encouraged or formal systems organised, and may occur before or after the delivery of wastes to the central collection point. Collection bins for used aluminium cans, waste paper and glass bottles are recommended to be provided at strategic locations of the development site to encourage recycling by residents.  Provision of recycling area in the refuse transfer facility.

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5.6 Land Contamination 5.6.1 Subject to EIA findings, the following mitigation measures will be considered during the construction phase to minimise any potential exposure to contaminated soils or groundwater:  Site workers should wear gloves, masks and other protective clothing where exposure to vapour or contaminated soil may be encountered.  Contaminated materials should be removed with bulk earth movers to prevent human contact.  Adequate washing facilities should be provided and smoking/eating should be prohibited in the area.  Any contaminated sediments that may need stockpiling or need to be transported should be covered with tarpaulin.  Leakage of pollutants or leaching from excavated soil should be prevented by storing on an impermeable surface.  Only licensed waste hauliers should be used to collect and transport any contaminated material to an appropriate disposal site and procedures should be developed to ensure that illegal disposal of wastes does not occur.  In view of the safety concerns about human contact with the contaminated soil, the contaminated soil should be treated properly and remediation action should be proposed, if required.  The necessary waste disposal permits should be obtained, as required, from the appropriate authorities, in accordance with the Waste Disposal Ordinance (Cap 354), Waste Disposal (Chemical Waste) (General) Regulation (Cap 354).

5.7 Ecology 5.7.1 The mitigation measures that would be implemented to minimize air quality, noise and water quality impact could also help to reduce potential impact to ecological resources. 5.7.2 As regards ecological impact, the principal of avoidance would be used wherever possible. For impact which is considered unavoidable, further mitigation measures would be considered, including translocation of important species, confining construction works to a specific area/season, alternative design/construction methods, good site practices etc.. Compensation would be considered for the loss of important species or habitats, if any.

5.8 Fisheries Construction Phase 5.8.1 In respect of identified fish culture zones, mitigation measures to minimise potential impact during the construction phase would be

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considered temporary given the transient nature of marine fish and the high flexibility of capture fisheries operation (in which small vessels such as sampans are commonly used in the area) the impacts are considered minor.

Operational Phase 5.8.2 The proposed Project should be designed to avoid possible disturbance from increased marine traffic during operation through careful design of the ferry routes which will generally follow the existing routes without adding new routes close to Sok Kwu Wan FCZ. The routes and frequency of transportation of refuse by sea should also be carefully designed to avoid disturbance to existing Sok Kwu Wan FCZ.

5.9 Cultural Heritage 5.9.1 Impacts to cultural heritage sites would be avoided as far as practicable. If unavoidable, mitigation measures for built heritage and archaeological resources would be implemented. 5.9.2 Cultural Heritage Impact Assessment (CHIA) comprising a Built Heritage Impact Assessment (BHIA) would be considered to conduct. The BHIA needs to compile an inventory of historic buildings and clan graves in the vicinity of the Project site. If unavoidable, appropriate mitigation measures would be designed and implemented.

5.10 Landscape and Visual 5.10.1 During the design stage, the following measures are to be considered to minimize the landscape and visual impacts, including, but not limited to:  the urban design principles such as the density of the development and focusing the development around certain functions;  controlling building height profiles and providing stepped building heights;  responsive building massing;  preserving and establishing visual and open space links, including provision of view and breeze corridors; and  landscape design principles such as avoid or minimize disturbance to significant landscape resources. 5.10.2 During the construction phase, the following general mitigation measures will be considered to alleviate the impacts, including, but not limited to:  erosion control measures should be implemented for protection of construction works and the landscape if heavy rains occur;

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 to maintain the appearance of a tidy site, construction plant (not in use) and materials should be stored neatly and covered where appropriate. Construction debris should be tidied regularly and good site waste management practices followed. Solid hoarding should be used to screen views into the construction site from visually sensitive receivers; and  tree transplanting and compensatory planting will be considered to mitigate the impact on the existing tree/woodland. 5.10.3 During the operational stage, the following general mitigation measures are to be considered, including, but not limited to:  roadside planting is proposed alongside all roads within the developments. It will enhance local identity, if theme planting is used, and reduce visual impact through screening;  amenity strips will be provided to local roads, wherever practicable, to mitigate their visual appearance;  seaside promenade will be designed to improve the visual appearance of the road corridor;  the visual impact of any noise mitigation measures will be mitigated by appropriate detailed design, including use of transparent panels, provision of at-grade planting of trees, shrubs and/or climbers camouflage to the barriers, appropriate colour selection of panels and supporting structure as well as design of supporting structures to incorporate a high level of quality and aesthetics. Sufficient space shall be allocated for greening provision in planning and designing of noise barriers. Relevant technical documents WBTC No. 25192 - Allocation of Space for Urban Street Trees, WBTC No. 7/2002 - Tree Planting in Public Works, and Guidelines on Design of Noise Barriers by HyD and EPD in 2003 shall be observed;  the landscape treatment of soil slopes will be provided to enhance their visual appearance. Relevant technical document GEO Publication No. 1/2011 Technical Guidelines on Landscape Treatment for Slopes by CEDD in 2011 shall be observed;  landscape treatment will be provided to any sewage pumping stations, refuse collection points, where practicable, to enhance their visual appearance. Relevant technical document Technical Circular (Works) No. 3/2012 Site Coverage of Greenery for Government Building Projects by Development Bureau in 2011 shall be observed;  the provision of the identified urban design measures as identified in the design stage.

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5.11 Severity, Distribution and Duration of Environmental Effects and Further Implications 5.11.1 Subject to the findings of the assessments, effective control and mitigation measures would be identified to ensure potential impacts are reduced to an acceptable level. The potential severity, distribution and duration of environmental effects such as beneficial and adverse effects, short and long term effects, secondary and induced effects, cumulative effects and transboundary effects would be considered and addressed in the EIA, where applicable. Feedback from public consultation conducted by the Project Proponent would also be documented in the EIA.

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6 Use Of Previously Approved EIA Reports

6.1.1 There is no EIA report already approved under the EIA Ordinance for this Project. However, the following report as shown in Table 6.1 is relevant and would be referred to in the EIA study. Where necessary, other relevant information identified during the Study would also be considered and documented in the EIA. Table 6.1 Previously approved EIA report EIAO Register Date of Relevance to Title No. Approval this Project EIA-022/BC Lamma Quarry: Casting Basin & 1993 The baseline Moderate Quarry Extension, information Environmental Impact Assessment would be considered as appropriate.

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Figures