Agreement No. CE 33/2011 (CE) Planning and Engineering ...

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

219753-REP-011-02

Revised Draft | February 2014

This report takes into account the particular

instructions and requirements of our client.

It is not intended for and should not be relied

upon by any third party and no responsibility

is undertaken to any third party.

Job number 219753

Ove Arup & Partners Hong Kong Limited

Level 5 Festival Walk

80 Tat Chee Avenue

Kowloon Tong

Kowloon

Hong Kong

www.arup.com

Planning Department and Civil Engineering and Development

Department

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

219753 | Revised Draft | 25 February 2014

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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

Planning Department and Civil Engineering and Development

Department

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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V5 ENG_FT.DOCX

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

Planning Department and Civil Engineering and

Development Department

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



ENG_FT.DOCX Page 1

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







ENG_FT.DOCX Page 2

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

No.

Project

Proponent

Project Title

CE 43/2005

(EP)

DSD Harbour Area Treatment Scheme (HATS) Stage

2A

CE 63/2008

(CE)

CEDD Providing Sufficient Water Depth for Kwai

Tsing Container Basin and its Approach

Channel

N/A The Baroque

on Lamma

Limited

The Baroque on Lamma

N/A Hong Kong

Electric

Development of a 100MW Offshore Wind Farm

in Hong Kong

CE 20/2005

(DS)

DSD Outlying Islands sewerage stage 1 phase 1 part

2 and phase 2- Yung Shue Wan and Sok Kwu







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Agreement

No.

Project

Proponent

Project Title

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.







ENG_FT.DOCX Page 15

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 (NSRs)

Luk Chau Village

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 (LCAs)

Former Sok Kwu Wan Quarry Coastal Landscape

North Lamma Coastal Uplands Landscape

Sok Kwu Wan Coastal Bay Landscape

Visual Sensitive Receivers (VSRs)

Lo So Shing

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 No.

Title Date of Approval

Relevance to this Project

EIA-022/BC Lamma Quarry: Casting Basin & Moderate Quarry Extension, Environmental Impact Assessment

1993 The baseline information would be considered as appropriate.

Figures

Agreement No. CE 33/2011 (CE) Planning and Engineering ...

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