2.1 General
Description of the Project
4.2 Environmental
Management Plan
4.4 Construction
Method Statement
5.5 Laboratory
Measurement / Analysis
6.3 Noise
Monitoring Parameters
7.3 Water
Monitoring Parameters
7.5 Laboratory
Measurement / Analysis
8 Sewage
& sewerage treatment implications
9 Waste Management
Implications
10.2 Proposed
Site Investigation for Potentially Contaminated Areas
10.3 Submission
Requirements of CAR, RAP and RR
13 Landscape and
Visual Impact
13.4 Environmental
Monitoring and Audit Requirement
14 Impact on Cultural
Heritage
15.3 Choice
of Construction Method
16.2 Baseline
Monitoring Report
16.3 Monthly
Monitoring Reports
16.4 Final
EM&A Review Reports
16.6 Interim
Notifications of Environmental Quality Limit Exceedances
Figure 1.1 Location of Project
Figure 1.2 Location of Associated
Infrastructure Works
Figure 2.1 Locations of Designated Projects
Figure 2.2 Locations of Concurrent Projects
Figure 2.3a Locations of Development Phasing in
TCE
Figure 2.3b Locations of Development Phasing in
TCW
Figure 5.1 Locations of Construction Dust
Monitoring Station
(Sheet 1 of 3)
Figure 5.1a Locations of Construction Dust Monitoring Station
(Sheet 2 of 3)
Figure 5.1b Locations of Construction Dust Monitoring Station
(Sheet 3 of 3)
Figure 6.1 Mitigation Measures for Road Traffic Noise and Railway
Noise at 2023 (Sheet 1 of 3)
Figure 6.1a Mitigation Measures for Road Traffic Noise and Railway
Noise at 2023 (Sheet 2 of 3)
Figure 6.1b Mitigation Measures for Road Traffic Noise and Railway
Noise at 2023 (Sheet 3 of 3)
Figure 6.2 Mitigation Measures for Road Traffic Noise and Railway
Noise at 2025 (Sheet 1 of 3)
Figure 6.2a Mitigation Measures for Road Traffic Noise and Railway
Noise at 2025 (Sheet 2 of 3)
Figure 6.2b Mitigation Measures for Road Traffic Noise and Railway
Noise at 2025 (Sheet 3 of 3)
Figure 6.3 Mitigation Measures for Road Traffic Noise and Railway
Noise at 2027 (Sheet 1 of 5)
Figure 6.3a Mitigation Measures for Road Traffic Noise and Railway
Noise at 2027 (Sheet 2 of 5)
Figure 6.3b Mitigation Measures for Road Traffic Noise and Railway
Noise at 2027 (Sheet 3 of 5)
Figure 6.3c Mitigation Measures for Road Traffic Noise and Railway
Noise at 2027 (Sheet 4 of 5)
Figure 6.3d Mitigation Measures for Road Traffic Noise and Railway
Noise at 2027 (Sheet 5 of 5)
Figure 6.4 Mitigation Measures for Road Traffic Noise and Railway
Noise at 2045 (Sheet 1 of 6)
Figure 6.4a Mitigation Measures for Road Traffic Noise and Railway
Noise at 2045 (Sheet 2 of 6)
Figure 6.4b Mitigation Measures for Road Traffic Noise and Railway
Noise at 2045 (Sheet 3 of 6)
Figure 6.4c Mitigation Measures for Road Traffic Noise and Railway
Noise at 2045 (Sheet 4 of 6)
Figure 6.4d Mitigation Measures for Road Traffic Noise and Railway
Noise at 2045 (Sheet 5 of 6)
Figure 6.4e Mitigation Measures for Road Traffic Noise and Railway
Noise at 2045 (Sheet 6 of 6)
Figure 6.5 Locations of Construction Airborne Noise Monitoring
Stations (Sheet 1 of 5)
Figure 6.5a Locations of Construction Airborne Noise Monitoring
Stations (Sheet 2 of 5)
Figure 6.5b Locations of Construction Airborne Noise Monitoring
Stations (Sheet 3 of 5)
Figure 6.5c Locations of Construction Airborne Noise Monitoring
Stations (Sheet 4 of 5)
Figure 6.5d Locations of Construction Airborne Noise Monitoring
Stations (Sheet 5 of 5)
Figure 6.6 Locations of Traffic Noise Monitoring Stations (Sheet 1 of 4)
Figure 6.6a Locations of Traffic Noise Monitoring Stations (Sheet 2 of 4)
Figure 6.6b Locations of Traffic Noise Monitoring Stations (Sheet 3 of 4)
Figure 6.6c Locations of Traffic Noise Monitoring Stations (Sheet 4 of 4)
Figure 7.1 Locations of Water Quality
Monitoring Stations (Sheet 1 of 2)
Figure 7.1a Locations of Water Quality
Monitoring Stations (Sheet 2 of 2)
Figure 14.1 Graphic Overview of Recommendations
and Executed Sampling Locations
Appendices
Appendix 2.1 Tentative Construction Programme
Appendix 3.1 Project Organization for Environmental Works
Appendix 4.1 Environmental Mitigation Implementation Schedule
(EMIS)
Appendix 5.1 Sample Data Sheet for TSP Monitoring
Appendix 6.1 Sample Data Sheet for Construction Noise Monitoring
Appendix
15.1 Proactive
Environmental Protection Proforma
Appendix
16.1 Sample
Template for Interim Notification
1.1.1.1 The study in North Lantau including Tung Chung area started since the Port and Airport Development Strategy in 1989 for the study on the construction of replacement international airport at Chek Lap Kok. Since then, various studies had been conducted including North Lantau Development Study in 1990, Territorial Development Strategic Review in 1996 and Remaining Development in Tung Chung and Tai Ho – Comprehensive Feasibility Study (CFS) in 1997. The CFS in 1997 showed that it was feasible for Tung Chung and Tai Ho areas to accommodate a population target of about 334,000 in anticipation of the projected territory-wide demand by 2011 estimated at that time. Phases 1, 2 and 3A of Tung Chung New Town were completed in 2003.
1.1.1.2 With the changes in planning circumstances and population target outlined in the above paragraphs, this Tung Chung New Town Extension Study will focus on the remaining development of Tung Chung covering possible development areas (PDAs) at Tung Chung East (TCE) and Tung Chung West (TCW) to meet the territorial long-term housing, social, economic and environmental needs with existing and committed developments in existing Tung Chung New Town being taken as the given constraints in general. This study is also required to review and establish the feasibility of the remaining development of Tung Chung as well as to prepare documents to meet the relevant statutory requirements.
1.1.1.3 A previous Project Profile (No. PP-470/2012) for the Tung Chung New Town Development Extension was submitted on 16 July 2012 and an EIA Study Brief (SB) (EIA SB No. ESB-251/2012) was subsequently issued on 28 August 2012 under the EIAO. Since then, the Project Proponent has been proactively conducting a series of public engagement exercises (including forums and workshops) to collate views and opinions from stakeholders, green groups and local communities etc. In parallel to the public engagement process, the planning and engineering designs of the Project have also been progressing and evolving to address various constraints and development needs as well as the comments collated in public engagement exercises.
1.1.1.4 These comments have been appropriately considered in formulating the Recommended Outline Development Plan (RODP). As such, the original PDA boundaries as presented in the previous EIA SB (EIA SB No.: ESB-251/2012) are refined and a number of associated infrastructures would also be required to support the development within the RODP. The key changes include the following:
·
Withdrawal of 50ha reclamation at TCW as proposed
in Stage 2 Public Engagement;
·
Removal of possible theme park/ major recreational
uses at TCE; and
·
Addition of marina; and
·
Addition of associated infrastructures.
1.1.1.5 Because of the abovementioned changes in Project elements, the Project Proponent had submitted another Project Profile (ref: PP-519/2014) for application of a new EIA SB on 17 December 2014. The Director of Environmental Protection (DEP) then issued an EIA SB (EIA SB No.: ESB-283/2014) on 28 January 2015 under the EIAO.
1.1.1.6 During the public inspection period of the Project Profile (PP-519/2014), comments from the public were received and had been considered and incorporated as appropriate in the EIA SB (ESB-283/2014) issued on 28 January 2015. Nevertheless, the Project Proponent had also pro-actively reviewed those comments and had studied to make provisions for the possible elements which could further enhance the development plan from environmental perspective As such, a revised Project Profile for this study (ref: PP-523/2015) for application of a new EIA SB had been submitted on 18 March 2015. The DEP then issued an EIA SB (EIA SB No.: 285/2015) on 17 April 2015 under the EIAO.
1.1.1.7 The location of the Project as presented in the EIA SB is shown in Figure 1.1. In addition, there are also associated infrastructure works (e.g. drainage connection, fresh water supply, flushing water supply) required to support the development and the respective pipe networks are illustrated in Figure 1.2.
1.1.1.8 Descriptions of the Project elements have been further elaborated and presented in Section 2.1.
1.2.1.1
The purposes of this Environmental
Monitoring and Audit (EM&A) Manual are to :
·
Guide
the set up of an EM&A programme to ensure compliance with the EIA
recommendations;
·
Specify
the requirements for monitoring equipment;
·
Propose
environmental monitoring points, monitoring frequency etc;
·
Propose
Action and Limit Levels; and
·
Propose
Event and Action Plans.
1.2.1.2 This Manual outlines the monitoring and audit programme for the construction and operation of the proposed Project and provides systematic procedures for monitoring, auditing and minimizing environmental impacts.
1.2.1.3 Hong Kong environmental regulations and the Hong Kong Planning Standards and Guidelines (HKPSG) have served as environmental standards and guidelines in the preparation of this Manual. In addition, this EM&A Manual has been prepared in accordance with the requirements stipulated in Annex 21 of the Technical Memorandum on the EIA Process (TM-EIAO).
1.2.1.4 This Manual contains the following information:
·
Responsibilities
of the Contractor, the Engineer or Engineer’s Representative (ER),
Environmental Team (ET), and the Independent Environmental Checker (IEC) under
the context of EM&A;
·
Project
organization for the EM&A works;
·
The
basis for, and description of the broad approach underlying the EM&A
programme;
·
Details
of the methodologies to be adopted, including all laboratories and analytical
procedures, and details on quality assurance and quality control programme;
·
The
rationale on which the environmental monitoring data will be evaluated and
interpreted;
·
Definition
of Action and Limit Levels;
·
Establishment
of Event and Action Plans;
·
Requirements
for reviewing pollution sources and working procedures required in the event of
non-compliance with the environmental criteria and complaints; and
·
Requirements
for presentation of environmental monitoring and audit data and appropriate
reporting procedures.
1.2.1.5 For the purpose of this manual, the ER shall refer to the Engineer as defined in the Construction Contract, in cases where the Engineer’s powers have been delegated to the ER, in accordance with the Construction Contract. The ET leader, who shall be responsible for and in charge of the ET, shall refer to the person delegated the role of executing the environmental monitoring and audit requirements.
2.1 General Description of the Project
2.1.1.1 As described in the latest EIA SB (EIA SB No.: ESB-283/2014), the Project comprises the following elements
·
129.1 ha reclamation area (120.5 ha for TCE and 8.6
ha for the Road P1 (Tung Chung – Tai Ho Section));
·
124.5 ha existing land (4 ha for TCE, 0.5 ha for the Road P1 (Tung
Chung – Tai Ho Section) and 120 ha for TCW));
·
Construction of a Primary Distributor Road with
total length of approximate 1.6km connecting Tung Chung to Tai Ho to support
further development in Tung Chung;
·
Construction of District Distributor Roads with
total length of approximate 3.5km within PDAs at TCE and TCW;
·
Construction of sewage pumping stations, some with
individual capacity more than 2,000m3/day within PDAs at TCE and
TCW;
·
Upgrading the existing Chung Mun Road Sewage
Pumping Station from existing capacity of 12,360m3/day to a proposed
capacity of approximately 20,660m3/day;
·
Land formation of a marina with about 95 berths at
the PDA at TCE as part of the reclamation;
·
Land formation
of an outdoor sporting facility with a capacity of over 10,000 persons
at the PDA at TCE as part of the reclamation;
·
Land formation of a petrol filling station with an
area of about 800m2 at the PDA at TCE as part of the reclamation;
·
Construction of two service reservoirs, including
one for fresh water and the other for flushing water, with capacities of 55,000
m3 and 11,000 m3 respectively;
·
Construction of about 4 km long of dual rising
mains at TCE connecting a proposed sewage pumping station within the PDA at TCE
to the existing Siu Ho Wan (SHW) Sewage Treatment Works (STW);
·
Construction of waterfront promenade at the coastal
area of proposed Town Park at the PDA at TCW;
·
Revitalisation of the existing channelized section
of Tung Chung Stream at the PDA at TCW and partly proposed as River Park;
·
Proposed River Park in the land adjacent to the
immediate upstream of the channelized section of Tung Chung Stream up to Shek
Mun Kap at the PDA at TCW;
·
A comprehensive network of cycle track (about 12km
long in total length) along the proposed distributor roads, waterfront
promenade, walkways and along future Road P1 (Tung Chung – Tai Ho Section);
·
Land formation of a possible cycle park with an
area of approximately 1.4ha surrounded by the slip roads connecting the future
Tai Ho Interchange to integrate with the cycle tracks in TCE for forming a
better cycle track network as part of the reclamation;
·
Provision of Sustainable urban drainage system
within TCW which comprises dual-purpose stormwater attenuation and treatment ponds;
·
Provision of sewerage system for the existing
unsewered villages and proposed residential developments within TCW ; and
· Space provisions of facilities for possible green initiatives such as regional energy efficiency system and environmentally friendly transport systems (e.g. electric buses, electric cars and bicycle sharing system), etc. to promote environmental performance. (Note: The initiative of District Cooling System (DCS) in Tung Chung will be separately considered. Should the initiative is to be put forward in future, the DCS will be implemented under separate project subject to further study.)
2.1.1.2 In addition, there are also associated infrastructure works (e.g. drainage connection, fresh water supply, flushing water supply) required to support the development. The respective pipe networks are illustrated in Figure 1.2.
2.1.1.3 According to the latest arrangement, the construction of two possible railway stations, with one at TCE and the other one at TCW, will be carried out by the rail operator and hence will not be covered under this Project. Since the railway system including railway stations and railway lines is a Designated Project under the EIAO, the rail operator shall conduct a separate EIA under the EIAO.
2.2.1.1
The
Study is a Designated Project (DP) under Item 1 Schedule 3 of EIAO -
Engineering feasibility study of urban development projects with a study area
covering more than 20 ha or involving a total population of more than 100,000. For
any future change(s) after the approval of this EIA report, the following steps
will be taken:
a)
Should the change(s) involve(s) a designated
project item under Schedule 2 of the EIAO, the requirements under the EIAO will
be complied with; and
b)
Should the change(s) not involve any designated
project items under Schedule 2 of the EIAO, prevailing planning mechanisms and
standards will be followed and relevant EIA findings will be conformed to.”
2.2.1.2
According to the RODP, a number of work components would fall under various Schedule 2 DPs
categories. A list of Schedule 2 DPs is summarised in Table 2.1 below and are further described in the sequent sections. The locations of these DPs under the
Project are shown in Figure 2.1.
Table 2.1 Summary of scheduled 2 DPs
Ref. Category No. |
Designated Projects |
Ref. in RODP |
Environmental
Permit (EP) Holder |
Part I, A.1 |
Primary
distributor roads and district distributor roads |
Proposed
road networks within PDA at TCE and TCW, Road P1 (Tung Chung to Tai Ho Section) and Chung
Mun Road |
CEDD [1] |
Part I, A.2 |
A railway and its associated stations. |
Future rail Operator |
|
Part I, A.8 |
A road more
than 100m in length between abutments |
The 400m
long viaduct section of Road P1 (Tung Chung to Tai Ho Section) connecting to
Tai Ho Interchange |
CEDD [1] |
Part I, C.l |
Reclamation
works (including associated dredging works) more than 5 ha in size |
Reclamation
area at TCE together with the necessary reclamation for Road P1 extension |
CEDD |
Part I, F.3(b) |
Sewage pumping stations with installed
capacity of more than 2000m3/d located at less than 150m from
existing/ planned receivers |
Proposed
sewage pumping stations within PDA at TCE and TCW |
CEDD [1] |
Part I,
I.1(b) |
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 a planned
conservation area and coastal protection area |
Revitalisation of the existing channelized section of Tung Chung
Stream at the PDA at TCW and possible drainage outlets of the sustainable urban drainage
system |
CEDD [1] |
Part I, O.2 |
A marina
designed to provide moorings or dry storage for not less than 30 vessels used
preliminarily for pleasure or recreation |
Proposed
marina to the north of PDA at TCE |
Future marina
operator |
Part I, O.7 |
An outdoor
sporting facility with a capacity to accommodate more than 10,000 persons |
Proposed
sports ground to the east of PDA at TCE |
Future operator |
Part I, Q.1 |
Any works
partly or wholly in a gazette proposed conservation area |
Earthworks
within CA zone |
CEDD [1] |
Note:
[1] CEDD will liaise with the relevant departments for transfer
of the operation responsibilities of these DPs through Further Environmental
Permits
Part I, A.1
- Primary distributor roads and district distributor roads
2.2.1.3 The internal roads in TCE consist of 4 district distributors with 2 lanes per direction and a number of local distributors with single lane per direction. Most of the internal roads are constructed at-grade, except a section of approximately 140m long in a form as a depressed road in order to encourage through pedestrian walking across the town centre and hence minimise the environmental impact. While in TCW, the internal roads consist of district and local distributors with typical at-grade road construction except the bridge structures across Tung Chung Stream. The existing Chung Mun Road will be extended to serve as a district distributor with two lanes per direction, while the local distributors will be single lane road. The remaining roads in the TCW development are local distributors that provide links to specific land parcels within the development. In terms of existing roads in the vicinity of the TCW development, Tung Chung Road will be maintained as a two-lane (both direction) rural road, while Yu Tung Road (district distributor) and Chung Yan Road (local distributor) will be two lanes per direction. In addition, the Road P1 (Tung Chung to Tai Ho Section) itself is a primary distributor road.
Part I, A.2
- A railway and its associated stations
2.2.1.4 According to the development direction of Tung Chung New Town and further feasibility study, new railway stations at TCE and TCW will be required to add to serve the increased population in TCE and TCW. Realignment of existing Tung Chung Line would be necessary to connect the proposed railway station near the southern edge of PDA boundary of TCE, while the proposed railway station at TCW would be located adjacent to Yu Tung Road near Area 39 and Yat Tung Estate. The construction and operation of new railway stations and the associated modification of railway will be conducted by future rail operator.
2.2.1.5 Since the Project involves modification of railway and a new railway station, it will be a DP under Item A.2 of Schedule 2, Part I of EIAO.
Part I, A.8
- A road more than 100m in length between abutments
2.2.1.6 Road P1 (Tung Chung to Tai Ho Section) aims to connect the existing Ying Hei Road to the proposed Tai Ho Interchange to serve the major external highway connection for TCE. The Road P1 comprises 3 elements: 1) 1km at-graded road, 2) one at-graded roundabout and 3) a viaduct section of approximately 400m connecting the Tai Ho Interchange.
Part I, C.1
- Reclamation works (including associated dredging works) more than 5 ha in
size
2.2.1.7 As mentioned in Section 2.1, the Project involves a reclamation of 120.5 hectare of land for formation of TCE and 8.6 hectare of land for extension of Road P1 (Tung Chung to Tai Ho Section).
Part I,
F.3(b) - Sewage pumping stations with installed capacity of more than 2000m3/d
located at less than 150m from existing/ planned receivers
2.2.1.8 Land parcels with “Government” landuse have been reserved in the development to provide governmental facilities including sewage pumping station (SPS), sports grounds/ sports centre, clinic etc to support the development. According to the RODP, 2 SPSs and 4 SPSs will be proposed at TCE and TCW respectively, in which 5 of them, including TCE SPS (East), TCE SPS (West), TCV SPS (East), TCV SPS (West) and upgraded Chung Mun Road SPS as shown in Figure 1.1, have an individual capacity over 2,000m3/day.
Part I, I.1(b) - 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 a planned conservation area and coastal
protection area
2.2.1.9
As
highlighted in 2015 Policy Address, the government is promoting the concept of
revitalising water bodies in large-scale drainage improvement works and
planning drainage networks. In order to enhance the ecological connection
between the upstream and downstream of Tung Chung Stream, it is proposed to
revitalise the existing channelized section of Tung Chung Stream with a total
length of approximately 625m long.
2.2.1.10 In addition, though the detailed
design of the sustainable urban drainage system (SUDS) is yet to be confirmed
and will be subject to further design, there is a possibility that the drainage
outlet of the SUDS will be assigned within the Conservation Area (CA) or
Coastal Protection Area (CPA) zone to discharge the treated runoff to the Tung
Chung Stream.
Part I, O.2
- A marina designed to provide moorings or dry storage for not less than 30
vessels used preliminarily for pleasure or recreation
2.2.1.11 In
order to revitalise the coastline, creating consumer activities and job
opportunities, a marina is proposed to locate adjacent to Tung Chung Channel,
with an area size of about 1.4 hectares to accommodate approximately 95 berths
and associated berthing facilities at TCE. The construction and operation of the marina will be conducted by
future marina operator.
Part I, O.7
- An outdoor sporting facility with a capacity to accommodate more than 10,000
persons
2.2.1.12 An area of 3ha is reserved for a sports ground. The requirement on capacity of the proposed sports ground will be subject to further design. For the purpose of this EIA Study, an estimation of seating capacity for 10,000 spectators has been assumed for relevant environmental impact assessments. Should the sports ground is designed to accommodate more than 10,000 people, it will be classified as a DP under Schedule 2 of the EIAO, and a separate EIA study is expected to be conducted by its respective project proponent to fulfil the relevant statutory requirements.
Part I, Q.1
– Any works partly or wholly in a gazette proposed conservation area
2.2.1.13 While the amount of works within CA or CPA zone would be minimized, there is still a possibility that minor earthworks would be required partly or wholly within the CA or CPA zone.
Possible
Minor Works
2.2.1.14 It
should also be noted that minor maintenance works including minor works to
connection roads, minor public utility works (e.g. installation of
telecommunication wires), earthworks relating to agriculture, footpaths/ trails
and facilities relating to sitting out areas, provision of water pipes etc
would be anticipated within the proposed conservation areas and sites of
cultural heritage. However, according to the Schedule 2 of the EIAO,
these minor works are not classified as designated project items and thus EP
application is not required.
2.2.1.15 The locations of these DPs under the
Project are shown in Figure 2.1.
2.3.1.1 In order to assess the cumulative impacts, a review of best available information to identify a number of other projects that are undergoing planning, design, construction and/or operation within the construction and/or operation period for this Study has been conducted and a list of the tentative concurrent projects identified at this stage is summarised below and Figure 2.2 shows the locations of these concurrent projects.
·
Construction
of additional sewage rising mains and rehabilitation of the existing sewage rising
main between Tung Chung and Siu Ho Wan;
·
Hong
Kong - Zhuhai - Macao Bridge Hong Kong Boundary Crossing Facilities (HZMB
HKBCF, being constructed);
·
Hong
Kong - Zhuhai - Macao Bridge Hong Kong Link Road (HZMB HKLR, being constructed);
·
Tuen
Mun - Chek Lap Kok Link (TM-CLKL, being constructed);
·
Proposed
New Contaminated Mud Marine Disposal Facility at Airport East / East Sha Chau
Area;
·
Integration
of Siu Ho Wan and Silver Mine Bay Water Treatment Works;
·
Organic
Waste Treatment Facilities Phase 1 (OWTF);
·
Possible
Lantau Logistics Park;
·
Expansion
of Hong Kong International Airport into a Three-Runway System (3RS);
·
Further
Landscape Enhancement to North Lantau Highway (NLH);
·
Planned
developments in the existing Tung Chung New Town such as residential
developments at Tung Chung Area 27, Area 39, Area 54, Area 55 and Area 56 and
hotel development at Tung Chung Area 53a;
·
Greening
Master Plans for New Territories South West – Investigation, Design and
Construction;
·
North
Commercial District (NCD) of Hong Kong International Airport (HKIA);
·
Dredging,
Management and Capping of Contaminated Sediment Disposal Facility to the South
of The Brothers;
·
Proposed
The Brothers Marine Park;
·
Topside
Development at HZMB HKBCF;
·
Cumulative
Environmental Impact Assessment Study for the Three Potential Nearshore
Reclamation Sites in the Western Waters of Hong Kong;
·
Harbour Area Treatment Scheme (HATS) Stage 2A;
·
Providing Sufficient Water Depth for Kwai Tsing
Container Basin and its Approach Channel;
·
Cross Boundary Hub in Siu Ho Wan;
·
Leisure and Entertainment Node at Sunny Bay;
·
Marina in TCE;
·
Sports ground in TCE; and
·
Proposed
Railway Station at TCE and TCW.
2.4.1.1
According to the current information, the
Tung Chung New Town Extension will be commissioned in phases with first
population intake in Year 2023. The construction work is targeted to commence
in Year 2017 and completed by Year 2030 for full population intake. The
implementation programme is shown in Appendix 2.1.
2.4.1.2
Summary of construction period of the key
construction works is summarized in the following table.
Table 2.2 Summary of key construction works
Stages |
Key Construction
Works |
Construction
Period |
Advanced
Works |
||
Advance Works |
· Ma Wan
Chung Improvement Works · Tung
Chung Road North · Access
Road to RO |
· Early
2017 to Mid 2017 |
Reclamation Works |
||
Reclamation Works |
· Tung
Chung East Reclamation · Box
Culvert Extension · Road P1
(Tung Chung – Tai Ho Section) Reclamation |
· Late 2017
to Late 2023 |
Tung Chung East |
||
Phase 1 Infrastructures |
· Road
Networks and Cycle Tracks in TCE Phase 1 · Fresh
Water Supply w/ pipelines in TCE Phase 1 · Salt
Water Supply w/ pipelines in TCE Phase 1 · Saltwater
In-take Pumping Station (by others) · Drainage
w/ pipelines in TCE Phase 1 · Sewerage
w/ pipelines in TCE Phase 1 · New
Sewage Pumping Station - TCE West SPS · Waterfront
Promenade - Phase 1 (by others) |
· Early
2020 to Mid/Late 2023 |
· Refuse
Collection Point (by others) · General
Clinic / Health Centre (by others) · Petrol
Filling Station (by others) |
· Early
2020 to Late 2023 |
|
Phase 2 Infrastructures |
· Road
Networks and Cycle Tracks in TCE Phase 2 · Fresh
Water Supply w/ pipelines in TCE Phase 2 · Salt
Water Supply w/ pipelines in TCE Phase 2 · Drainage
w/ pipelines in TCE Phase 2 · Sewerage
w/ pipelines in TCE Phase 2 · Water
Front Promenade - Phase 2 (by others) |
· Late 2020
to Late 2024 |
Phase 3 Infrastructures |
· Road
Networks and Cycle Tracks in TCE Phase 3 · Salt
Water Supply w/ pipelines in TCE Phase 3 · Fresh
Water Supply w/ pipelines in TCE Phase 3 · Drainage
w/ pipelines in TCE Phase 3 · Sewerage
w/ pipelines in TCE Phase 3 · Water
Front Promenade - Phase 3 (by others) |
· Late 2022
to Late 2027 |
Phase 4 Infrastructures |
· Road
Networks and Cycle Tracks in TCE Phase 4 · Drainage
w/ pipelines in TCE Phase 4 · Salt
Water Supply w/ pipelines in TCE Phase 4 · Fresh
Water Supply w/ pipelines in TCE Phase 4 · Sewerage
w/ pipelines in TCE Phase 4 · New
Sewage Pumping Station - TCE East SPS · Water
Front Promenade - Phase 4 (by others) · Police
Married Quarters (C0-2) (by others) · District
Police Station (C0-3) (by others) · Secondary
School (E-01) (by others) · Primary School
(E-02) (by others) · Primary
School (E-03) (by others) · Undesignated
GIC (E-04) · Sports
Ground / Sports Centre (F-01) (by others) · Primary
School (F-02) (by others) · Primary
School (F-03) (by others) · Secondary
School (F-04) (by others) · Boatyard
and Maintenance Area (F-05) (by others) · Sports
Ground / Sports Centre (G-01) (by others) · Post
Secondary Institution (G-02) (by others) · Fire
Station (G-03) (by others) |
· Early
2024 to Early 2030 |
Tung
Chung West |
||
Phase 1 Infrastructures |
· Road
Networks and Cycle Track in TCW Phase 1 · Fresh
Water Supply w/ pipelines in TCW Phase 1 · Salt
Water Supply w/ pipelines in TCW Phase 1 · Drainage
w/ pipelines in TCW Phase 1 · Attenuation
ponds and pumping stations for Tung Chung West in TCW Phase 1 · De-channalisation
of channelised portion of Tung Chung Stream · Sewerage
w/ pipelines in TCW Phase 1 · New
Sewage Pumping Station - TCV East SPS |
· Early
2019 to Late 2023 |
Phase 2 Infrastructures |
· Road
Networks and Cycle Track in TCW Phase 2 · Bridges
in Tung Chung West · Fresh
Water Supply w/ pipelines in TCW Phase 2 · Salt
Water Supply w/ pipelines in TCW Phase 2 · Drainage
w/ pipelines in TCW Phase 2 · Attenuation
ponds and pumping stations for Tung Chung West Phase 2 · Polder
Scheme for Tung Chung West · Sewerage
w/ pipelines in TCW Phase 2 · New
Sewage Pumping Station · Upgrading
Existing Sewage Pumping Station - Tung Chung West - CMRSPS · Water
Front Promenade (by others) |
· Early
2022 to Late 2030 |
· General
Clinic / Health Centre (by others) · Telephone
Exchange (by others) |
· Early
2022 to Late 2030 |
|
· Sports
Ground / Sports Centre (by others) · Primary
School (by others) |
· Late 2020
to Late 2024 |
|
Others |
||
Service Reservoirs |
· Site
Formation Works for Freshwater Service Reservoir · Freshwater
Service Reservoir · Fresh
Water Supply w/ pipelines at Service Reservoir · Site
Formation Works for Saltwater Service Reservoir · Saltwater
Service Reservoir · Salt
Water Supply w/ pipelines at Service Reservoir |
· Mid 2018
to Mid 2022 |
Road P1 (Tung Chung – Tai Ho Section) |
· Road P1
(Tung Chung – Tai Ho Section) roadworks, Slip Roads and Tai Ho Interchange · Cycle
Track at Road P1 (Tung Chung – Tai Ho Section) |
· Early
2021 to Early 2024 |
Infrastructure
Works (by others) |
||
Phase 1 Infrastructure (by others) |
· CLP
sub-station (by others) |
· Late 2020
to Late 2023 |
· Upgrading
Works of Siu Ho Wan Water Treatment Works (by others) |
· Mid 2018
to Mid 2021 |
|
· Fitting-out
works of Siu Ho Wan Sewage Treatment Works (by others) |
· Mid 2021
to End 2024 |
2.4.1.3 Population intake for the proposed new development area in TCE and TCW will be implemented in phases together with the supporting infrastructures. Based on the implementation of the supporting infrastructures, the proposed new development will be available for the population intake as listed in the summary of the schedule of the population intake in the following table. It is the prediction based on the early availability of land and phase completion of the supporting infrastructure to support the population and will still be subject to change according to the latest implementation programme and government policy. Locations of development phasing in TCE and TCW are illustrated in Figures 2.3a and 2.3b.
Table 2.3 Population intake summary
Phase |
Year of Population Intake |
Population Intake (Approximate) |
Cumulative Population Intake
(Approximate) |
Tung
Chung East |
|||
Phase 1 |
2023 |
23,900 |
23,900 |
Phase 2 |
2025 |
13,700 |
37,600 |
Phase 3 |
2027 |
37,000 |
74,600 |
Phase 4 |
2029 -
2030 |
44,300 |
118,900 |
Tung
Chung West |
|||
Phase 1 |
2023 |
19,200 |
19,200 |
Phase 2 |
2026 to
2030 |
6,300 |
25,500 |
3.1.1.1
The proposed project organization and lines
of communication with respect to environmental protection works are shown in Appendix
3.1.
3.1.1.2 The leader of the ET shall be an independent party from the Contractor and has relevant professional qualifications, or have sufficient relevant EM&A experience subject to approval of the ER.
3.1.1.3 The responsibilities of respective parties are:
The
Contractor
· Implement the EIA recommendations and requirements;
· Employ an ET to undertake monitoring, laboratory analysis and reporting of environmental monitoring and audit;
· Provide assistance to ET in carrying out monitoring and auditing;
· Submit proposals on mitigation measures in case of exceedances of Action and Limit Levels in accordance with the Event and Action Plans;
· Implement measures to reduce impact where Action and Limit Levels are exceeded; and
· Adhere to the agreed procedures for carrying out compliant investigation.
Environmental
Team
·
Set
up all the required environmental monitoring stations;
·
Monitor
various environmental parameters as required in the EM&A Manual;
·
Analyse
the environmental monitoring and audit data, review the
success of EM&A programme, confirm the adequacy of mitigation
measures implemented and the validity of the EIA predictions, and to identify any adverse environmental impacts arising;
·
Carry
out site inspection to investigate and audit the Contractors’ site practice,
equipment and work methodologies with respect to pollution control and
environmental mitigation measures, and take proactive actions to
pre-empt problems;
·
Audit
and prepare audit reports on the environmental monitoring data and site
environmental conditions;
·
Report
on the environmental monitoring and audit results to the IEC, Contractor, the
ER and EPD or its delegated representative;
·
Recommend
suitable mitigation measures to the Contractor in the case of exceedance of
Action and Limit Levels in accordance with the Event and Action Plans;
·
Undertake
regular on-site audits / inspections and report to the Contractor and the ER of
any potential non-compliance;
·
Follow
up and close out non-compliance actions; and
·
Adhere to the procedures for carrying out environmental complaint
investigation.
Engineer
or Engineer’s Representative
·
Supervise
the Contractor’s activities and ensure that the requirements in the EM&A
Manual are fully complied with;
·
Inform
the Contractor when action is required to reduce impacts in accordance with the
Event and Action Plans;
·
Assist the
Project Proponent in employing an
IEC to audit the results of the EM&A works carried out by the ET;
·
Comply
with the agreed Event Contingency Plan in the event of any exceedance;
·
Adhere to the
procedures for carrying out complaint investigations.
Independent
Environmental Checker
·
Review
the EM&A works performed by the ET (at not less than monthly intervals);
·
Audit
the monitoring activities and results (at not less than monthly intervals);
· Validate and confirm the accuracy of monitoring results, monitoring equipment, monitoring locations, monitoring procedures and location of sensitive receivers;
·
Report
the audit results to the ER and EPD in parallel;
·
Review
the EM&A reports (monthly and quarterly summary reports) submitted by the
ET;
·
Review
the proposal on mitigation measures submitted by the Contractor in accordance
with the Event and Action Plans;
·
Check
the mitigation measures submitted by the Contractor in accordance with the
Event and Action Plans;
·
Check
the mitigation measures that have been recommended in the EIA and this Manual,
and ensure they are properly implemented in a timely manner, when necessary;
and
·
Report
the findings of site inspections and other environmental performance reviews to
ER and EPD.
3.1.1.4 Sufficient and suitably qualified professional and technical staff shall be employed by the respective parties to ensure full compliance with their duties and responsibilities, as required under the EM&A programme for the duration of the Project.
3.1.1.5 The ET Leader shall have at least 7 years of experience in conducting EM&A for infrastructure projects. His / Her qualification shall be vetted by the ER and the IEC. And the IEC should possess at least 7 years of experience in EM&A.
4.1.1.1
The Contractor shall prepare the
Environmental Management Plan (EMP) (including a Waste Management Plan, WMP), Construction
Method Statement prior to the commencement of construction works and obtain
approval from ER and IEC and other relevant authorities to encompass the
recommended environmental protection / mitigation measures with respect to
their latest construction methodology and programme.
4.2 Environmental Management Plan
4.2.1.1 A systematic EMP shall be set up by the Contractor to ensure effective implementation of the mitigation measures, monitoring and remedial requirements presented in EIA, EM&A and Environmental Mitigation Implementation Schedule (EMIS) (See Appendix 4.1). The ER and the IEC will audit the implementation status against the EMP and advise the necessary remedial actions required. These remedial actions shall be enforced by the ER through contractual means.
4.2.1.2 The EMP will require the Contractor (together with its sub-contractors) to define in details how to implement the recommended mitigation measures in order to achieve the environmental performance defined in the Hong Kong environmental legislation and the EIA documentation.
4.2.1.3
The review of on-site environmental
performance shall be undertaken by ER and IEC through a systematic checklist
and audit once the construction works commences. The environmental performance
review programme comprises a regular assessment on the effectiveness of the
EMP. Reference should be made to ETWBTC 19 / 2005 “Environmental Management on
Construction Sites” or its latest versions, and any other relevant Technical
Circulars.
4.3.1.1 As part of EMP, the Contractor shall include WMP for the construction of the project and prior to the commencement of construction works submit to the ER and IEC for approval. Where waste generation is unavoidable, the opportunities for recycling or reusing should be maximized. If wastes cannot be recycled, recommendations for appropriate disposal routes should be provided in the WMP. A method statement for stockpiling and transportation of the excavated materials and other construction wastes should also be included in the WMP and be approved before the commencement of construction works. All mitigation measures arising from the approved WMP shall be fully implemented.
4.3.1.2
For the purpose of enhancing the management
of Construction and Demolition (C&D) materials including rock, and
minimizing its generation at source, construction works would be undertaken in
accordance with the Section 4.1.3 of Chapter 4 in the Project Administration
Handbook for Civil Engineering Works (PAH) .
4.4 Construction Method Statement
4.4.1.1
In case the Contractor would like to adopt
alternative construction methods or implementation schedules, it is required to
submit details of methodology and equipment to the ER for approval before the
work commences. Any changes in construction method shall be reflected in a
revised EMP or the Contractor will be required to demonstrate the manner in
which the existing EMP should accommodate the proposed changes. The Contractor may need to apply for a
Variation of Environmental Permit (VEP) from EPD before commencement of any
construction activities.
5.1.1.1
The EIA has considered the potential air
quality impacts during both the construction and operational phases of the
Project. Fugitive dust and vehicular emission would be the key impacts during
the construction phase and operational phase respectively.
5.2.1.1
The EIA Report has recommended dust control
measures including watering all works area once per hour during working
hours. Mitigation measures are not
required for the operational phase. All the proposed mitigation measures are
summarized in the Environmental Mitigation Implementation Schedule (EMIS) in Appendix
4.1.
5.3.1.1
Monitoring and audit of the Total Suspended
Particulate (TSP) levels shall be carried out by the ET to ensure that any
deteriorating air quality could be readily detected and timely action taken to
rectify the situation.
5.3.1.2
One-hour TSP levels shall be measured to
indicate the impacts of construction dust on air quality. The 1-hour TSP levels
shall be measured by following the standard high volume sampling method as set
out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50),
Appendix B. Upon approval of the IEC, 1-hour TSP levels can be measured by
direct reading method which are capable of producing comparable results as that
by the high volume sampling method, to indicate short event impacts.
5.3.1.3
All relevant data including temperature,
pressure, weather conditions, elapsed-time meter reading for the start and stop
of the sampler, identification and weight of the filter paper, and any other
local atmospheric factors affecting or affected by site conditions, etc., shall
be recorded down in detail. A sample data sheet is shown in Appendix
5.1.
5.4.1.1
High volume samplers (HVSs) complying with
the following specifications shall be used for carrying out the 1-hour TSP
monitoring:
·
0.6
– 1.7 m3 per minute adjustable flow range;
·
Equipped
with a timing / control device with +/- 5 minutes accuracy for 24 hours
operations;
·
Installed
with elapsed-time meter with +/- 2 minutes accuracy for 24 hours
operation;
·
Capable
of providing a minimum exposed area of 406cm2;
·
Flow
control accuracy: +/- 2.5% deviation over 24-hour
sampling period;
·
Equipped
with a shelter to protect the filer and sampler;
·
Incorporated
with an electronic mass flow rate controller or other equivalent devices;
·
Equipped
with a flow recorder for continuous monitoring;
·
Provided
with a peaked roof inlet;
·
Incorporated
with a manometer;
·
Able
to hold and seal the filter paper to the sampler housing at horizontal
position;
·
Easily
changeable filter; and
·
Capable
of operating continuously for a 24-hour period.
5.4.1.2
The ET is responsible for the provision,
installation, operation, maintenance, dismantle of the monitoring equipment.
They shall ensure that sufficient number of HVSs with an appropriate
calibration kit is available for carrying out the baseline monitoring, regular
impact monitoring and ad hoc monitoring. The HVSs shall be equipped with an
electronic mass flow controller and be calibrated against a traceable standard
at regular intervals. All the equipment, calibration kit, filter papers, etc.,
shall be clearly labelled.
5.4.1.3
Initial calibration of dust monitoring
equipment shall be conducted upon installation and thereafter at fortnightly
intervals. The transfer standard shall be traceable to the internationally
recognized primary standard and be calibrated annually. The concern parties
such as IEC shall properly document the calibration data for future reference.
All the data should be converted into standard temperature and pressure
condition.
5.4.1.4
The flow-rate of the sampler before and
after the sampling exercise with the filter in position shall be verified to be
constant and be recorded in the data sheet as mentioned in Appendix
5.1.
5.4.1.5
If the ET proposes to use a direct reading
dust meter to measure 1-hour TSP levels, they shall submit sufficient
information to the IEC to prove that the instrument is capable of achieving a
comparable results to the HVS. The instrument should also be calibrated
regularly, and the 1-hour sampling shall be determined periodically by the HVS
to check the validity and accuracy of the results measured by direct reading
method.
5.4.1.6
Wind data monitoring equipment shall also be
provided and set up for logging wind speed and wind direction near the dust
monitoring locations. The equipment installation location shall be proposed by
the ET and agreed with the IEC. For installation and operation of wind data
monitoring equipment, the following points shall be observed:
·
The
wind sensors should be installed at 10m above ground so that they are clear of
obstructions or turbulence caused by buildings;
·
The
wind data should be captured by a data logger, the data shall be downloaded for
analysis at least once a month;
·
The
wind data monitoring equipment should be re-calibrated at least once every six
months; and
·
Wind
direction should be divided into 16 sectors of 22.5 degrees each.
5.4.1.7
In exceptional situations, the ET may
propose alternative methods to obtain representative wind data upon approval
from the ER and agreement from the IEC.
5.5 Laboratory Measurement / Analysis
5.5.1.1
A clean laboratory with constant temperature
and humidity control, and equipped with necessary measuring and conditioning
instruments to handle the dust samples collected, shall be available for sample
analysis, and equipment calibration and maintenance. The laboratory should be Hong Kong Laboratory
Accreditation Scheme (HOKLAS) accredited.
5.5.1.2
If as site laboratory is set up or a
non-HOKLAS accredited laboratory is hired for carrying out the laboratory
analysis, the laboratory equipment shall be approved by the ER and the
measurement procedures shall be demonstrated to the satisfaction of the ER and
IEC. IEC shall regularly audit to the measurement performed by the laboratory
to ensure the accuracy of measurement results. The ET Leader shall provide the
ER with one copy of the Title 40 of Code of Federal Regulations, Chapter 1
(Part 50), Appendix B for his / her reference.
5.5.1.3 Filter paper of size 8” x 10” shall be labelled before sampling. It shall be a clean filter paper with no pinholes, and shall be conditioned in a humidity-controlled chamber for over 24-hours and be pre-weighed before use for the sampling.
5.5.1.4
After sampling, the filter paper loaded with
dust shall be kept in a clean and tightly sealed plastic bag. The filter paper
shall then be returned to the laboratory for reconditioning in the
humidity-controlled chamber followed by accurate weighing by an electronic
balance with readout down to 0.1 mg. The balance shall be regularly calibrated
against a traceable standard.
5.6.1.1
Figure 5.1, Figure
5.1a
and Figure 5.1b show the locations of the proposed
construction dust monitoring stations. The status and locations of dust
sensitive receivers may change after issuing this manual. If such cases exist,
the ET Leader shall proposed updated monitoring locations and seek approval
from ER and agreement from the IEC.
Table 5.1 Construction dust monitoring locations
ID |
ASR ID |
Location |
Impact
Monitoring Period |
DM-1 |
P7 |
Tung Chung Area 56 – Planned
Public Rental Housing Development |
From commencement of
construction period until flat intakes of TCE-7 and TCE-14 |
DM-2 |
TCE-7 |
Proposed Residential
Development (B1-2) |
From its flat intake until
the end of construction period |
DM-3 |
TCE-14 |
Proposed Residential
Development (D2-2) |
From its flat intake until
the end of construction period |
DM-4 |
TCE-24 |
Proposed Residential
Development (A2-4) |
From its flat intake until
the end of construction period |
DM-5 |
A33 |
Lung Tseung Tau |
Entire construction period |
DM-6 |
A39 |
Mo Ka |
Entire construction period |
5.6.1.2
When alternative monitoring locations are
proposed, the proposed site should, as far as practicable:
·
be
at the site boundary or such locations close to the major dust emission source;
·
be
close to the sensitive receptors; and
·
take
into account the prevailing meteorological conditions.
5.6.1.3
The ET shall agree with the ER in
consultation with the IEC on the position of the HVS for the installation of
the monitoring equipment. When
positioning the samplers, the following points shall be noted:
·
a
horizontal platform with appropriate support to secure the samplers against
gusty wind should be provided;
·
no
two samplers should be placed less than 2 meters apart;
·
the
distance between the sampler and an obstacle, such as buildings, must be at
least twice the height that the obstacle protrudes above the sampler;
·
a
minimum of 2 meters of separation from walls, parapets and penthouses is
required for rooftop samplers;
·
a
minimum of 2 meters separation from any supporting structure, measured
horizontally is required;
·
no
furnace or incinerator flue is nearby;
·
airflow
around the sampler is unrestricted;
·
the
sampler is more than 20 meters from the dripline;
·
any
wire fence and gate, to protect the sampler, should not cause any obstruction
during monitoring;
·
permission
must be obtained to set up the samplers and to obtain access to the monitoring
stations; and
·
a
secured supply of electricity is needed to operate the samplers.
5.6.1.4
The ET may, depending on site conditions and
monitoring results, decide whether additional monitoring locations shall be
included or any monitoring locations could be removed / relocated during any stage of the
construction phase.
5.7.1.1
Baseline monitoring shall be carried out at
all of the designated monitoring locations (see Table 5.1) for at least 14 consecutive days prior to the
commissioning of major construction works to obtain 1-hour TSP samples. The
selected baseline monitoring stations should reflect baseline conditions at the
impact stations. One-hour sampling should also be done at least 3 times per day
while the highest dust impact is expected.
5.7.1.2
During the baseline monitoring, there should
not be any major construction or dust generation activities in the vicinity of
the monitoring stations. Before commencing baseline monitoring, the ET shall
inform the IEC of the baseline monitoring programme such that, if required, the
ER can conduct on-site audit to ensure accuracy of the baseline monitoring
results.
5.7.1.3
In case the baseline monitoring cannot be
carried out at the designated monitoring locations, the ET Leader shall carry
out the monitoring at alternative locations that can effectively represent the
baseline conditions at the impact monitoring locations. The alternative
baseline monitoring locations shall be approved by the ER and agreed with the
IEC.
5.7.1.4
In exceptional cases, when insufficient
baseline monitoring data or questionable results are obtained, the ET shall
liaise with the IEC and EPD to agree on an appropriate set of data to be used
as a baseline reference and submit to ER for approval.
5.7.1.5
Ambient conditions may vary seasonally and
shall be reviewed once every three months. When the ambient conditions have
changed and a repeat of the baseline monitoring is required to be carried out
for obtaining the updated baseline levels, the monitoring should be at times
when the Contractor's activities are not generating dust, at least in the
proximity of the monitoring stations. Should change in ambient conditions be
determined, the baseline levels and, in turn, the air quality criteria, should
be revised. The revised baseline levels and air quality criteria should be
agreed with the IEC and EPD.
5.8.1.1
The ET shall carry out impact monitoring
during the entire construction period unless specified in Table 5.1. For regular impact monitoring of 1-hour TSP, the
sampling frequency of at least 3 times in every 6 days should be undertaken
when the highest dust impact occurs.
Before commencing impact monitoring, the ET shall inform the IEC of the
impact monitoring programme such that the IEC can conduct on-site audit to
ensure accuracy of the monitoring results.
5.8.1.2
In case of non-compliance with the air
quality criteria, more frequent monitoring, as specified in the Action Plan in
the following section, shall be conducted within the specified timeframe after
the result is obtained. This additional monitoring shall be continued until the
excessive dust emission or the deterioration in air quality is rectified, and
agreed with the ER and the IEC.
5.9.1.1
The baseline monitoring results form the
basis for determining the air quality criteria for the impact monitoring. The
ET shall compare the impact monitoring results with air quality criteria set up
for 1-hour TSP. Table 5.2 shows the
air quality criteria, namely Action and Limit Levels to be used.
Table 5.2 Action and Limit
Levels for air quality
Parameters |
Action |
Limit |
1-hour TSP Level in μg/m3 |
For baseline level £ 384 μg/m3, Action level = (baseline level * 1.3 + Limit level)/2; For baseline level > 384 μg/m3, Action level = Limit level |
500 μg/m3 |
5.10.1.1 Should
non-compliance of the air quality criteria occur, actions in accordance with
the Action Plan in Table 5.3 shall
be carried out.
Table 5.3 Event and Action Plan for air quality
Event |
Action |
|||
ET |
IEC |
ER |
Contractor |
|
Action level exceedance for one sample |
1. Identify source, investigate the causes of exceedance and propose remedial measures; 2. Inform IEC and ER; 3. Repeat measurement to confirm finding; 4. Increase monitoring frequency to daily. |
1. Check monitoring data submitted by ET; 2. Check Contractor’s working method. |
1. Notify Contractor. |
1. Rectify any unacceptable practice; 2. Amend working methods if appropriate. |
Action level exceedance for two or more consecutive samples |
1. Identify source; 2. Inform IEC and ER; 3. Advise the ER on the effectiveness of the proposed remedial measures; 4. Repeat measurements to confirm findings; 5. Increase monitoring frequency to daily; 6. Discuss with IEC and Contractor on remedial actions required; 7. If exceedance continues, arrange meeting with IEC and ER; 8. If exceedance stops, cease additional monitoring. |
1. Check monitoring data submitted by ET; 2. Check Contractor’s working method; 3. Discuss with ET and Contractor on possible remedial measures; 4. Advise the ET on the effectiveness of the proposed remedial measures; 5. Supervise Implementation of remedial measures. |
1. Confirm receipt of notification of failure in writing; 2. Notify Contractor; 3. Ensure remedial measures properly implemented.
|
1. Submit proposals for remedial to ER within 3 working days of notification; 2. Implement the agreed proposals; 3. Amend proposal if appropriate. |
Limit level exceedance for one sample |
1. Identify source, investigate the causes of exceedance and propose remedial measures; 2. Inform ER, Contractor and EPD; 3. Repeat measurement to confirm finding; 4. Increase monitoring frequency to daily; 5. Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER informed of the results. |
1. Check monitoring data submitted by ET; 2. Check Contractor’s working method; 3. Discuss with ET and Contractor on possible remedial measures; 4. Advise the ER on the effectiveness of the proposed remedial measures; 5. Supervise implementation of remedial measures. |
1. Confirm receipt of notification of failure in writing; 2. Notify Contractor; 3. Ensure remedial measures properly implemented. |
1. Take immediate action to avoid further exceedance; 2. Submit proposals for remedial actions to IEC within 3 working days of notification; Implement the agreed proposals; 4. Amend proposal if appropriate. |
Limit level exceedance for two or more consecutive samples |
1. Notify IEC, ER, Contractor and EPD; 2. Identify source; 3. Repeat measurement to confirm findings; 4. Increase monitoring frequency to daily; 5. Carry out analysis of Contractor’s working procedures to determine possible mitigation to be implemented; 6. Arrange meeting with IEC and ER to discuss the remedial actions to be taken; 7. Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER informed of the results; 8. If exceedance stops, cease additional monitoring. |
1. Discuss amongst ER, ET, and Contractor on the potential remedial actions; 2. Review Contractor’s remedial actions whenever necessary to assure their effectiveness and advise the ER accordingly; 3. Supervise the implementation of remedial measures. |
1. Confirm receipt of notification of failure in writing; 2. Notify Contractor; 3. In consultation with the IEC, agree with the Contractor on the remedial measures to be implemented; 4. Ensure remedial measures properly implemented; 5. If exceedance continues, consider what portion of the work is responsible and instruct the Contractor to stop that portion of work until the exceedance is abated. |
1. Take immediate action to avoid further exceedance; 2. Submit proposals for remedial actions to IEC within 3 working days of notification; 3. Implement the agreed proposals; 4. Resubmit proposals if problem still not under control; 5. Stop the relevant portion of works as determined by the ER until the exceedance is abated. |
Notes:
ET – Environmental Team
IEC – Independent Environmental Checker
6.1.1.1
The EIA has considered the potential noise impacts
during both the construction and operational phases of the Project. Noise
monitoring is proposed to be conducted during construction and operational phase.
6.2.1 Construction Phase
6.2.1.1
The EIA Report has recommended construction
noise mitigation measures including the use of quiet plant and temporary noise
barriers, etc. All the proposed mitigation measures are summarized in the EMIS
in Appendix 4.1.
6.2.2 Operational Noise
Road Traffic Noise
6.2.2.1
Due to the nature of the Project, population
intake will be carried out in 4 phases (i.e. Year 2023 for Phase 1, Year 2025
for Phase 2, Year 2027 for Phase 3 and Year 2030 for Phase 4) and thus road
traffic noise impact assessments at interim years and ultimate year have been
conducted. Results indicate that mitigation measures at interim years Year 2025
and Year 2027, and ultimate Year 2045 will be required. A series of noise
mitigation measures including 1) noise barriers along some road sections or
boundary walls within development sites; 2) application of low noise road
surfacing materials on some road sections; 3) suitable treatment on end walls,
arranging noise tolerant portions of buildings in internal layout design and architectural
fins in some buildings, would need to
be implemented and the required mitigation measures
under the above mentioned years are listed in Table 6.1a to Table 6.1d and are shown in Figure
6.1,
Figure 6.1a-b, Figure 6.2, Figures 6.2a-b, Figure 6.3, Figures 6.3a-d, Figure 6.4, and Figures 6.4a-e respectively.
Table 6.1a Extents and locations of proposed mitigation
measures at 2023
Zoning |
Location |
Type of Mitigation Measures [1] [2] [3] |
TCE |
||
B1-1 |
Facade of residential block |
Facade with no openable window |
B1-1 |
Facade of residential block |
1.5m long architectural fin |
B1-2 |
Facade of residential block |
Facade with no openable window |
B1-2 |
Facade of residential block |
1.5m
long architectural fin |
TCW |
||
TCV-6 |
Facade of residential block |
Facade with no openable window |
- |
Possible School Development near Tung Chung Area 39 |
Approx. 50m long, 4m high school boundary
wall |
- |
Corner at junction between Chung Mun Road and Road L24 |
Approx. 120m long, 5m high vertical barrier
with 3m cantilevered arm
at 45o |
- |
Along Chung Mun Road |
Approx. 210m long LNRS |
- |
Along Road L24 |
Approx. 160m long LNRS |
- |
Along Road L30 |
Approx. 160m long LNRS |
Notes: [1] Details are shown in Figure 6.1. [2] LNRS – Low Noise Road
Surfacing Materials. [3] An environmental review may be conducted in due course to study
how the use of new road surfacing
material could help reduce traffic noise impacts and minimise the
scale/extent of the proposed noise mitigation measures. |
Table
6.1b Extents and locations of proposed mitigation measures at 2025
Zoning |
Location |
Type of Mitigation Measures [1] [2] [3] |
TCE |
||
B1-1 |
Facade of residential block |
Facade with no openable window |
B1-1 |
Facade of residential block |
1.5m long architectural fin |
B1-2 |
Facade of residential block |
Facade with no openable window |
B1-2 |
Facade of residential block |
1.5m long architectural fin |
D0-3 |
Along Road L3 |
Approx. 60m long, 5m high school boundary
wall |
D0-4 |
Along Road L3 |
Approx. 70m long, 5m high school boundary
wall with 3m cantilevered arm
at 45o |
D1-1 |
Facade of residential block |
Facade with no openable window |
D1-2 |
Facade of residential block |
Facade with no openable window |
D2-3 |
Facade of residential block |
Facade with no openable window |
D2-4 |
Facade of residential block |
Facade with no openable window |
D2-4 |
Facade of residential block |
1.5m long architectural fin |
TCW |
||
TCV-6 |
Facade of residential block |
Facade with no openable window |
- |
Possible School Development near Tung Chung Area 39 |
Approx. 50m long, 4m high school boundary
wall |
- |
Corner at junction between Chung Mun Road and Road L24 |
Approx. 120m long, 5m high vertical barrier
with 3m cantilevered arm
at 45o |
- |
Along Chung Mun Road |
Approx. 210m long LNRS |
- |
Along Road L24 |
Approx. 160m long LNRS |
- |
Along Road L30 |
Approx. 160m long LNRS |
Notes: [1] Details are shown in Figure 6.2. [2] LNRS – Low Noise Road
Surface Materials. [3] An environmental review may be conducted in due course to study how the use of new road surfacing material could help reduce traffic noise impacts and minimise the scale/extent of the proposed noise mitigation measures. |
Table 6.1c Extents and
locations of proposed mitigation measures at 2027
Zoning |
Location |
Type of Mitigation Measures [1] [2] [3] |
TCE |
||
A1-1 |
Facade of residential block |
Facade with no openable window |
A1-1 |
Facade of residential block |
1.8m long architectural fin |
A1-2 |
Facade of residential block |
Facade with no openable window |
A1-2 |
Facade of residential block |
1.8m long architectural fin |
A2-1 |
Facade of residential block |
Facade with no openable window |
A2-1 |
Facade of residential block |
1.5m long architectural fin |
A2-1 |
Facade of residential block |
1.8m long architectural fin |
A2-2 |
Facade of residential block |
Facade with no openable window |
A2-3 |
Facade of residential block |
Facade with no openable window |
A2-4 |
Facade of residential block |
Facade with no openable window |
A2-4 |
Facade of residential block |
1.5m long architectural fin |
A2-4 |
Facade of residential block |
1.8m long architectural fin |
B1-1 |
Facade of residential block |
Facade with no openable window |
B1-1 |
Facade of residential block |
1.5m long architectural fin |
B1-2 |
Facade of residential block |
Facade with no openable window |
B1-2 |
Facade of residential block |
1.5m long architectural fin |
D0-3 |
Along Road L3 |
Approx. 60m long, 5m high school boundary
wall |
D0-4 |
Along Road L3 |
Approx. 70m long, 5m high school boundary
wall with 3m cantilevered arm
at 45o |
D1-1 |
Facade of residential block |
Facade with no openable window |
D1-2 |
Facade of residential block |
Facade with no openable window |
D2-3 |
Facade of residential block |
Facade with no openable window |
D2-4 |
Facade of residential block |
Facade with no openable window |
D2-4 |
Facade of residential block |
1.5m long architectural fin |
TCW |
||
TCV-6 |
Facade of residential block |
Facade with no openable window |
- |
Possible School Development near Tung Chung Area 39 |
Approx. 50m long, 4m high school boundary
wall |
- |
Corner at junction between Chung Mun Road and Road L24 |
Approx. 120m long, 5m high vertical barrier
with 3m cantilevered arm
at 45o |
- |
Along Chung Mun Road |
Approx. 210m long LNRS |
- |
Along Road L24 |
Approx. 160m long LNRS |
- |
Along Road L30 |
Approx. 160m long LNRS |
Notes: [1] Details are shown in Figure 6.3. [2] LNRS – Low Noise Road
Surface Materials. [3] An environmental review may be conducted in due course to study
how the use of new road surfacing material could help reduce traffic noise
impacts and minimise the scale/extent of the proposed noise mitigation
measures. |
Table 6.1d Extents and
locations of proposed mitigation measures at 2045
Zoning |
Location |
Type of Mitigation Measures [1] [2] [3] |
TCE |
||
A1-1 |
Facade of residential block |
Facade with no openable window |
A1-1 |
Facade of residential block |
1.8m long architectural fin |
A1-2 |
Facade of residential block |
Facade with no openable window |
A1-2 |
Facade of residential block |
1.8m long architectural fin |
A2-1 |
Facade of residential block |
Facade with no openable window |
A2-1 |
Facade of residential block |
1.5m long architectural fin |
A2-1 |
Facade of residential block |
1.8m long architectural fin |
A2-2 |
Facade of residential block |
Facade with no openable window |
A2-3 |
Facade of residential block |
Facade with no openable window |
A2-4 |
Facade of residential block |
Facade with no openable window |
A2-4 |
Facade of residential block |
1.5m long architectural fin |
A2-4 |
Facade of residential block |
1.8m long architectural fin |
A2-4 |
Along Road D3 |
Approx. 100m long, 5m high absorptive
vertical barrier |
B1-1 |
Facade of residential block |
Facade with no openable window |
B1-1 |
Facade of residential block |
1.5m long architectural fin |
B1-2 |
Facade of residential block |
Facade with no openable window |
B1-2 |
Facade of residential block |
1.5m long architectural fin |
C1-1 |
Facade of residential block |
Facade with no openable window |
C1-1 |
Facade of residential block |
1.5m long architectural fin |
C1-1 |
Facade of residential block |
1.8m long architectural fin |
C1-1 |
Along Road L7 |
Approx. 50m long, 5m high absorptive
vertical barrier with 3m cantilevered
arm at 45o |
C2-1 |
Facade of residential block |
Facade with no openable window |
C2-2 |
Facade of residential block |
Facade with no openable window |
D0-3 |
Along Road L3 |
Approx. 60m long, 5m high school boundary
wall |
D0-4 |
Along Road L3 |
Approx. 70m long, 5m high school boundary
wall with 3m cantilevered arm
at 45o |
D1-1 |
Facade of residential block |
Facade with no openable window |
D1-2 |
Facade of residential block |
Facade with no openable window |
D2-3 |
Facade of residential block |
Facade with no openable window |
D2-4 |
Facade of residential block |
Facade with no openable window |
D2-4 |
Facade of residential block |
1.5m long architectural fin |
E0-1 |
Along Road L2 |
Approx. 80m long, 4m high school boundary wall |
E0-3 |
Along Road L2 |
Approx. 40m long, 3m high school boundary
wall |
E1-4 |
Facade of residential block |
Facade with no openable window |
E1-5 |
Facade of residential block |
Facade with no openable window |
TCW |
||
TCV-1 |
Facade of residential block |
Facade with no openable window |
TCV-1 |
Facade of residential block |
1.5m long architectural fin |
TCV-6 |
Facade of residential block |
Facade with no openable window |
- |
Possible School Development near Tung Chung Area 39 |
Approx. 50m long, 4m high school boundary
wall |
- |
Corner at junction between Chung Mun Road and Road L24 |
Approx. 120m long, 5m high vertical barrier
with 3m cantilevered arm
at 45o |
- |
Along Chung Mun Road |
Approx. 210m long LNRS |
- |
Along Road L24 |
Approx. 160m long LNRS |
- |
Along Road L30 |
Approx. 160m long LNRS |
Notes: [1] Details are shown in Figure 6.4. [2] LNRS – Low Noise Road Surfacing Materials. [3] An
environmental review may be conducted in due course to study how the use of
new road surfacing material could help reduce traffic noise impacts and
minimise the scale/extent of the proposed noise mitigation measures. |
6.2.2.2
Apart
from noise mitigation measures listed above, it should be noted the design and
layout of the new town extension have also proactively located some commercial
buildings between residential buildings and NLH to provide noise screening.
This helps to avoid traffic noise impacts from NLH as much as practicable at
the outlet.
Fixed Noise
6.2.2.3
For
the proposed noise sources which are located near to existing and planned NSRs,
the following tentative noise mitigation measures shall be considered:
·
All
the pumps should be enclosed inside building structures;
·
Proper
selection of quiet plant to reduce the tonality at NSRs;
·
Installation
of silencer / acoustic enclosure / acoustic louvers for the exhaust of
ventilation system.
·
For
underground train stations, sound attenuators with sufficient attenuations can
be installed to the ventilation shafts.
·
Openings
of ventilation system should be located away from NSRs.
6.3 Noise Monitoring Parameters
6.3.1 Noise Monitoring Parameter for Construction Phase
6.3.1.1
Construction noise level shall be measured
in terms of the A-weighted equivalent continuous sound pressure level (Leq).
Leq (30min) shall be used as the monitoring parameter for the time
period between 0700 and 1900 hours on normal weekdays. For all other time periods, Leq (5min)
shall be employed for comparison with the Noise Control Ordinance (NCO)
criteria. A sample data sheet is
shown in Appendix 6.1.
6.3.1.2
As supplementary information for data
auditing, statistical results such as L10 and L90 shall
also be obtained for reference.
6.3.2 Noise Monitoring Parameter for Operational Phase
6.3.2.1 The traffic noise level shall be measured twice within the first year of the road opening. Measurement shall be made in terms of A-weighted L10 over three half-hour periods during the peak traffic hour. Other metrics like Leq may be added as seen fit.
6.3.2.2
As supplementary information for data auditing,
statistical results such as L10 and L90 shall also be
obtained for reference.
6.4.1 Monitoring Equipment for Construction and Operational Phases
6.4.1.1
As referred to in the Technical Memorandum
(TM) issued under the NCO, sound level meters in compliance with the
International Electrotechnical Commission Publications 651: 1979 (Type 1) and
804: 1985 (Type 1) specifications shall be used for carrying out the noise
monitoring. Immediately prior to and following each noise measurement, the accuracy
of the sound level meter shall be checked using an acoustic calibrator
generating a known sound pressure level at a known frequency. Measurements may be accepted as valid only if
the calibration level from before and after the noise measurement agrees to
within 1.0 dB.
6.4.1.2
Noise measurements should be made in
accordance with standard acoustical principles and practices in relation to
weather conditions.
6.4.1.3 The ET is responsible for the provision, installation, operation, maintenance, dismantle of the monitoring equipment. He shall ensure that sufficient noise measuring equipment and associated instrumentation are available for carrying out the baseline monitoring, regular impact monitoring and ad hoc monitoring. All the equipment and associated instrumentation shall be clearly labelled.
6.5.1 Monitoring Locations for Construction Phase
6.5.1.1 The most representative and affected NSRs were selected as monitoring stations and details could be referred to EIA Report. The locations of construction airborne noise monitoring stations are summarised in table below and shown in Figures 6.5, 6.5a – 6.5d.
Table 6.2 Proposed construction noise monitoring locations
ID |
NSR
ID |
Description |
Tung Chung East |
||
NMS-CA-1 |
B1-2-04 |
Residential premise in Tung Chung East |
NMS-CA-2 |
F0-3-01 |
School in Tung Chung East |
NMS-CA-3 |
PSc-001 |
School
in the reclamation area next to Tung Chung East |
NMS-CA-4 |
A56-004 |
Residential
premise in the reclamation area next to Tung Chung East |
Tung Chung West |
||
NMS-CA-5 |
MWC-003 |
Village
house in Ma Wan Chung |
NMS-CA-6 |
SMK-003 |
Village
house in Shek Mun Kap |
NMS-CA-7 |
Esc-006 |
YMCA
of Hong Kong Christian College |
NMS-CA-8 |
Esc-003 |
Caritas
Charles Vath College |
NMS-CA-9 |
PSc-004 |
Possible
school development near Tung Chung Area 39 |
6.5.1.2
The ET shall select the monitoring locations
from the above table based on the locations of the construction activities and
seek approval from ER and agreement from the IEC and EPD to the proposal. The
monitoring locations should be chosen based on the following criteria:
·
At
locations close to the major site activities which are likely to have noise
impacts;
·
Close
to the most affected existing noise sensitive receivers; and
·
For
monitoring locations located in the vicinity of the sensitive receivers, care
should be taken to cause minimal disturbance to the occupants during
monitoring.
6.5.1.3
The monitoring station shall normally be at
a point 1m from the exterior of the sensitive receiver building facade and be
at a position 1.2m above the ground. If there is problem with access to the
normal monitoring position, an alternative position may be chosen, and a
correction to the measurements shall be made. For reference, a correction of +3
dB(A) shall be made to the free field measurements. The ET shall agree with the IEC on the
monitoring position and the corrections adopted. Once the positions for the
monitoring stations are chosen, the baseline monitoring and the impact
monitoring shall be carried out at the same positions.
6.5.1.4
The ET may, depending on site conditions and
monitoring results, decide whether additional monitoring locations shall be
included or any monitoring locations could be removed / relocated during any
stage of the construction phase.
6.5.2 Monitoring Locations for Operational Phase
6.5.2.1
The locations of road traffic noise
monitoring stations after final population intake are summarised in table below
and shown in Figures
6.6, 6.6a
– 6.6c.
Table 6.3 Proposed road traffic noise monitoring locations
ID |
NSR ID |
Description |
Tung Chung East |
||
NMS-OA-1 |
A1-1-04a |
Residential premise in Tung Chung East |
NMS-OA-2 |
A1-2-04l |
Residential premise in Tung Chung East |
NMS-OA-3 |
D0-4-02 |
School in Tung
Chung East |
Tung Chung West |
||
NMS-OA-5 |
TCV-1-11a |
Residential premise in Tung Chung West |
NMS-OA-6 |
TCV-6-03 |
Residential premise in Tung Chung West |
NMS-OA-7 |
ESc-003 |
Caritas Charles Vath College |
6.5.2.2 The ET shall select the monitoring location and seek approval from ER and agreement from the IEC and EPD to the proposal. The ER/IEC/EPD may also request a closer locations based on on-site conditions and environmental complaint. The monitoring locations should be chosen based on the following criteria:
·
At
locations close to the noise mitigation measures such as noise barriers;
·
Close
to the most affected existing noise sensitive receivers; and
·
For
monitoring locations located in the vicinity of the sensitive receivers, care
should be taken to cause minimal disturbance to the occupants during
monitoring.
6.5.2.3 The monitoring station shall normally be at a point 1m from the exterior of the sensitive receiver building facade and be at a position 1.2m above the ground. If there is problem with access to the normal monitoring position, an alternative position may be chosen, and a correction to the measurements shall be made. For reference, a correction of +3 dB(A) shall be made to the free field measurements. The ET shall agree with the IEC on the monitoring position and the corrections adopted.
6.6.1.1
The ET shall carry out baseline noise
monitoring prior to the commencement of the construction works. There shall not
be any construction activities in the vicinity of the stations during the
baseline monitoring. Continuous baseline
noise monitoring for the A-weighted levels Leq, L10 and L90
shall be carried out daily for a period of at least two weeks in a sample
period of 5 minutes or 30 minutes between 0700 and 1900, and 5 minutes between
1900 and 0700. A schedule on the baseline monitoring shall be submitted to the
ER and IEC for approval before the monitoring starts.
6.6.1.2
In exceptional cases, when insufficient
baseline monitoring data or questionable results are obtained, the ET shall
liaise with the IEC and EPD to agree on an appropriate set of data to be used
as a baseline reference and submit to the ER for approval.
6.7.1 Impact Monitoring for Construction Phase
6.7.1.1
During normal construction working hour
(0700-1900 Monday to Saturday), monitoring of Leq, (30min) noise
levels (as six consecutive Leq, (5min) readings) shall be carried
out at the agreed monitoring locations once every week in accordance with the
methodology in the TM.
6.7.1.2
In case of non-compliance with the
construction noise criteria, more frequent monitoring, as specified in the
Action Plan, shall be carried out. This additional monitoring shall be
continued until the recorded noise levels are rectified or proved to be
irrelevant to the construction activities.
6.7.1.3
A schedule on the compliance monitoring
shall be submitted to the ER and IEC for approval before the monitoring starts.
6.7.2 Impact Monitoring for Road Traffic Noise during Operational Phase
6.7.2.1
The ET should prepare and deposit to EPD, at
least 6 months before the operation of the proposed roads under the Project, a
monitoring plan for the purpose of assessing the accuracy of traffic noise
predictions by comparing the noise impact predictions with the actual impacts.
The monitoring plan should contain monitoring locations, monitoring schedules,
methodology of noise monitoring including noise measurement procedures, traffic
counts and speed checks, and methodology of comparison with the predicted
levels. The ET should implement the monitoring plan in accordance with the
deposited monitoring plan unless with prior justifications. Monitoring details
and results including the comparison between the measured noise levels and the
predicted levels should be recorded in a report to be deposited with EPD within
one month of the completion of the monitoring. The report should be certified
by the ET Leader before deposit with EPD.
6.7.2.2
Traffic noise monitoring shall be carried
out at all the designated traffic noise monitoring stations. The following is
an initial guide on the traffic noise monitoring requirements during the
operational phase:
·
two
sets of measurements at the morning traffic peak hour on normal days;
·
one
set of measurement at the morning traffic peak hour on festival days;
·
a
concurrent census of traffic flow and percentage heavy vehicles shall be
conducted for the Project Road and the existing road network in the vicinity of
each measurement points;
·
average
vehicle speed estimated for Project Road and the existing road network in the
vicinity of each measuring points; and
·
the
three sets of monitoring data shall be obtained within the first year of
operation.
6.7.2.3 Measured noise levels shall be compared with the predicted noise levels by applying appropriate conversion corrections to allow for the traffic conditions at the time of measurement.
6.7.3 Fixed Noise Commissioning Test
6.7.3.1
The
maximum allowable sound power levels of the identified fixed noise sources have
been predicted in the EIA report. The Contractor should implement and refine
the specified sound power levels as appropriate to ensure compliances with the
noise standards stipulated in the TM-EIAO and NCO for the fixed plant operations.
6.7.3.2
The
Contractor should also carry out a noise commissioning test for all fixed noise
sources before operation of the Project, in order to ensure compliance of the
noise levels with the TM’s stipulated noise standard.
6.8.1.1 The ET shall compare the construction noise monitoring results with noise criteria. Table 6.4 shows the noise criteria, namely Action and Limit Levels to be used.
Table 6.4 Action and Limit Levels for construction noise
Time Period |
Action Level |
Limit Level |
0700
- 1900 hours on normal weekdays |
When
one documented complaint is received |
75
dB(A) * |
Notes:
If works are to be
carried out during restricted hours, the conditions stipulated in the
construction noise permit issued by the Noise Control Authority have to be
followed.
* Reduce to 70 dB(A) for schools and 65 dB(A)
during school examination periods.
6.9.1.1
Should non-compliance of the noise criteria
occur, actions in accordance with the Action Plan in Table 6.5 shall be carried out.
Table
6.5 Event and Action Plan for construction noise
Event |
Action |
|||
ET |
IEC |
ER |
Contractor |
|
Action Level
Exceedance |
1. Notify IEC, ER and Contractor; 2. Carry out investigation; 3. Report the results of investigation to the IEC,
ER and Contractor; 4. Discuss with the Contractor and formulate
remedial measures; 5. Increase monitoring frequency to check mitigation
effectiveness. |
1. Review the analysed results submitted by the ET; 2. Review the proposed remedial measures by the
Contractor and advise the ER accordingly; 3. Supervise the implementation of remedial
measures. |
1. Confirm receipt of notification of failure in
writing; 2. Notify Contractor; 3. Require Contractor to propose remedial measures
for the analysed noise problem; 4. Ensure remedial measures are properly implemented |
1. Submit noise mitigation proposals to IEC and ER; 2. Implement
noise mitigation proposals. |
Limit Level
Exceedance |
1. Identify source; 2. Inform IEC, ER, EPD and Contractor; 3. Repeat measure-ments to confirm findings; 4. Increase monitoring frequency; 5. Carry out analysis of Contractor’s working
procedures to determine possible mitigation to be implemented; 6. Inform IEC, ER and EPD the causes and actions
taken for the exceedances; 7. Assess effectiveness of Contractor’s remedial
actions and keep IEC, EPD and ER informed of the results; 8. If exceedance stops, cease additional monitoring. |
1. Discuss amongst ER, ET, and Contractor on the
potential remedial actions; 2. Review Contractors remedial actions whenever
necessary to assure their effectiveness and advise the ER accordingly; 3. Supervise the implementation of remedial
measures. |
1. Confirm receipt of notification of failure in
writing; 2. Notify Contractor; 3. Require Contractor to propose remedial measures
for the analysed noise problem; 4. Ensure remedial measures properly implemented; 5. If exceedance continues, consider what portion of
the work is responsible and instruct the Contractor to stop that portion of
work until the exceedance is abated. |
1. Take immediate action to avoid further
exceedance; 2. Submit proposals for remedial actions to IEC within 3 working days of notification; 3. Implement the agreed proposals; 4. Resubmit proposals if problem still not under
control; 5. Stop the relevant portion of works as determined
by the ER until the exceedance is abated. |
Notes:
ET
– Environmental Team
IEC
– Independent Environmental Checker
ER
– Engineer’s Representative
6.9.1.2 For traffic noise, the measured / monitored noise levels shall be compared with the predicted results and the predicted traffic flow conditions (calculated noise levels based on concurrent traffic census obtained). In case discrepancies are observed, explanation shall be given to justify the discrepancies.
7.1.1.1
The EIA Report has assessed the water
quality impacts associated with the Project. According to the EIA Report, the
water quality impact could be minimized with the implementation of mitigation
measures. The water quality monitoring programme as discussed below could
ensure the implementation of the recommended mitigation measures and provide
continue improvements to the environmental conditions.
7.2.1.1
The EIA Report has recommended construction
phase mitigation measures. All the proposed mitigation measures are summarized
in the EMIS in Appendix 4.1.
7.3 Water Monitoring Parameters
7.3.1.1
The monitoring shall normally be established
by measuring the dissolved oxygen (DO),
dissolved oxygen saturation (DO%), temperature, turbidity, salinity, pH and
suspended solids (SS) in water bodies at all designated locations as
specified in Section 7.6.
7.3.1.2 The measurements shall be taken at all designated monitoring stations 3 days per week during construction phase. The interval between two sampling surveys shall not be less than 36 hours.
7.3.1.3 Replicate in-situ measurements and samples collected from each independent sampling event shall be collected to ensure a robust statistically interpretable database. DO, pH value, salinity, temperature and turbidity should be measured in-situ whereas other parameters should be determined by an accredited laboratory.
7.3.1.4 Other relevant data shall also be recorded, including monitoring location / position, time, water depth, tidal stages, weather conditions and any special phenomena or work underway at the construction site.
7.4.1 Dissolved Oxygen, Dissolved Oxygen Saturation and Temperature Measuring Equipment
7.4.1.1 The dissolved oxygen (DO) measuring instruments should be portable and weatherproof. The equipment should also complete with cable and sensor, and DC power source. It should be capable of measuring:
· A DO level in the range of 0 – 20 mg/L and 0 – 200% saturation; and
· A temperature of 0 – 45 degree Celsius.
7.4.1.2 The equipment should have a membrane electrode with automatic temperature compensation complete with a cable.
7.4.1.3
Should salinity compensation not be built-in
to the DO equipment, in-situ salinity should be measured to calibrate the DO
measuring instruments prior to each measurement.
7.4.2 Turbidity Measuring Equipment
7.4.2.1 The turbidity measuring instruments should be a portable and weatherproof with DC power source. It should have a photoelectric sensor capable of measuring turbidity level between 0 – 1000 NTU (for example, Hach model 2100P or an approved similar instrument).
7.4.3 Salinity Measuring Equipment
7.4.3.1 A portable salinometer capable of measuring salinity in the range of 0 – 40 parts per thousand (ppt) should be provided for measuring salinity of the water at each monitoring location.
7.4.4 pH Measuring Equipment
7.4.4.1 A portable pH meter capable of measuring a pH range between 0.0 and 14.0 shall be provided under the specified conditions (e.g., Orion Model 250A or an approved similar instrument).
7.4.5 Positioning Equipment
7.4.5.1 A hand-held or boat-fixed type digital Differential Global Positioning System (DGPS) with way point bearing indication and Radio Technical Commission for maritime (RTCM) Type 16 error message “screen pop-up” facilities (for real-time auto-display of error messages and DGPS corrections from the Hong Kong Hydrographic Office), or other equipment instrument of similar accuracy, should be provided and used during marine water monitoring to ensure the monitoring vessel is at the correct location before taking measurements.
7.4.6 Water Depth Detector
7.4.6.1 A portable, battery-operated echo sounder should be used for water depths determination at each designated monitoring station. The detector can either be hand held or affixed to the bottom of the work boat, if the same vessel is to be used throughout the monitoring programme.
7.4.7 Water Sampling Equipment
7.4.7.1 A water sampler is required for SS monitoring. It should comprise a transparent PVC cylinder, with a capacity of not less than 2 litres, which can be effectively sealed with latex cups at both ends. The sampler should have a positive latching system to keep it open and prevent premature closure until released by a messenger when the sampler is at the selected water depth (for example, Kahlsico Water Sampler or an approved similar instrument).
7.4.8 Sample Containers and Storage
7.4.8.1 Water samples for SS should be stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4°C without being frozen) and shipment to the testing laboratory. The samples shall be delivered to the laboratory within 24 hours of collection and be analysed as soon as possible after collection.
7.4.9 Calibration of In-Situ Instruments
7.4.9.1 The pH meter, DO meter and turbidimeter shall be checked and calibrated before use. DO meter and turbidimeter shall be certified by a laboratory accredited under HOKLAS or any other international accreditation scheme, and subsequently re-calibrated at quarterly basis throughout all stages of the water quality monitoring. Responses of sensors and electrodes should be checked with certified standard solutions before each use. Wet bulb calibration for a DO meter shall be carried out before measurement at each monitoring station.
7.4.10 Back-up Equipment and Vessels
7.4.10.1 Sufficient stocks of spare parts shall be maintained for replacements when necessary. Backup monitoring equipment shall also be made available so that monitoring can proceed uninterrupted even when some equipment is under maintenance, calibration, malfunction, etc.
7.4.10.2 The water quality monitoring will involve four monitoring stations and measurements should be conducted within the prescribed tidal conditions in order to ensure the measurement / samples are representative. A multi-probe monitoring equipment set integrated with water sampler(s) is highly recommended to improve the monitoring efficiency. Depending on the actual operation, more than one field survey vessels might be required simultaneously to ensure the monitoring are conducted within the acceptable monitoring period. The ET shall also consider the use of unattended automatic sampling / monitoring devices at fixed stations where monitoring are required throughout the construction period. The use of such unattended automatic devices, however, shall be subject to the approval of the ER, IEC and EPD.
7.5 Laboratory Measurement / Analysis
7.5.1.1 At least 3 replicate samples from each independent sampling event are required for the SS measurement which shall be carried in a HOKLAS or international accredited laboratory. Sufficient water samples shall be collected at the monitoring stations for carrying out the laboratory measurement and analysis. The laboratory determination work shall start within 24 hours after collection of the water samples. The analysis for suspended solids is presented in Table 7.1.
Table 7.1 Laboratory analysis
Parameters |
Analytical Method |
Reporting Limit |
Suspended Solid (SS) |
APHA
2540-D [1] |
0.5mg/L |
7.6.1.1
Water quality monitoring will be carried out at 7 locations at TCE (TCE-WQM1
to TCE-WQM4, TCE-C1 to TCE-C2) of the marine water and 5 locations of TCW (TCW-WQM1 to
TCE-WQM5) of the inland water
nearby the project site.
7.6.1.2
The
proposed water quality monitoring locations are shown in Figure 7.1 and 7.1a and listed in
Table 7.2. The ET shall seek
approval from IEC and EPD for any alternative monitoring locations.
Table 7.2 Locations of proposed water quality monitoring stations
Monitoring
Station ID |
Description |
Easting |
Northing |
TCE |
|||
TCE-WQM1 |
Near Airport Channel |
811838 |
817341 |
TCE-WQM2a |
Marine Park 1 |
814439 |
819879 |
TCE-WQM2b |
Marine Park 2 |
821905 |
821905 |
TCE-WQM3 |
Tai Ho Wan |
814845 |
817676 |
TCE-WQM4 |
HKBCF |
813344 |
818849 |
TCE-C1 |
Control Station - Outside Airport Channel |
804247 |
815620 |
TCW-C2 |
Control Station - Sunny Bay |
819460 |
821473 |
TCW |
|||
TCW-WQM1 |
Downstream of Tung Chung Stream |
810784 |
815710 |
TCW-WQM2 |
Middle of Tung Chung Stream |
810701 |
815015 |
TCW-WQM3 |
Middle of Tung Chung Stream |
811067 |
815036 |
TCW-WQM4 |
Upstream of Tung Chung Stream |
810641 |
814405 |
TCW-WQM5 |
Upstream of Tung Chung Stream |
811194 |
814368 |
7.7.1.1 Baseline conditions for water quality shall be established and agreed with EPD prior to be commencement of construction works. The purpose of the baseline monitoring is to establish ambient conditions prior to the commencement of the construction works and to demonstrate the suitability of the proposed impact and control monitoring stations.
7.7.1.2 The baseline monitoring shall be conducted for at least 4 weeks prior to the commencement of construction works. The proposed water quality monitoring schedule shall be submitted to EPD by the ET at least 2 weeks before the first day of the monitoring month. The interval between two sets of monitoring shall not be less than 36 hours. EPD shall also be notified immediately for any changes in schedule.
7.7.1.3 In general, where the difference in value between the first and second in-situ measurement of DO or turbidity parameters is more than 25% of the value of the first reading, the reading shall be discarded and further readings should be taken.
7.7.1.4 There should be no construction work in the vicinity of the stations during the baseline monitoring. The baseline data will be used to establish the Action and Limit Levels. The determination of Action and Limit Levels will be discussed in Section 7.9.
7.7.1.5 Table 7.3 below summarizes the proposed monitoring frequency and water quality parameters for baseline monitoring.
Table 7.3 Proposed water quality monitoring programme
Item |
Baseline
Monitoring |
Monitoring Period |
At least 4 weeks prior to the commencement of
construction work |
Monitoring Frequency |
3 Days in a Week |
Monitoring Locations |
TCE: TCE-WQM1, TCE-WQM2a, TCE-WQM2b, TCE-WQM3, TCE-WQM4,
TCE-C1 , TCE–C2 TCW: TCW-WQM1, TCW-WQM2, TCW-WQM3, TCW-WQM4, TCW-WQM5 |
Monitoring Parameters |
Dissolved oxygen (DO), dissolved oxygen
saturation (DO%), temperature, turbidity, salinity, pH and suspended solids
(SS). |
Intervals between 2 Sets of Monitoring |
Not less than 36 hours |
7.8.1.1 The impact monitoring shall be conducted during construction period. The purpose of impact monitoring is to ensure the implementation of the recommended mitigation measures, provide effective control of any malpractices, and provide continuous improvements to the environmental conditions. The proposed water quality monitoring schedule shall be submitted to EPD by the ET at least 2 weeks before the first day of the monitoring month. The interval between two sets of monitoring shall not be less than 36 hours. EPD shall also be notified immediately for any changes in schedule.
7.8.1.2 In general, where the difference in value between the first and second in-situ measurement of DO or turbidity parameters is more than 25% of the value of the first reading, the reading shall be discarded and further readings should be taken.
7.8.1.3 In case of project-related exceedances of Action and/or Limit Levels, the impact monitoring frequency shall be increased according to the requirement of Event and Action Plan. The details of Event Action Plan will be discussed in Section 7.10.
7.8.1.4 Table 7.4 below summarises the proposed monitoring frequency and water quality parameters for and impact monitoring.
Table 7.4 Proposed water quality monitoring programme
Item |
Impact
Monitoring |
Monitoring Period |
During entire construction period |
Monitoring Frequency |
3 Days in a Week |
Monitoring Locations |
TCE: TCE-WQM1, TCE-WQM2a, TCE-WQM2b, TCE-WQM3,
TCE-WQM4, TCE-C1 , TCE–C2 TCW: TCW-WQM1, TCW-WQM2, TCW-WQM3, TCW-WQM4,
TCW-WQM5 |
Monitoring Parameters |
Dissolved oxygen (DO), dissolved oxygen
saturation (DO%), temperature, turbidity, salinity, pH and suspended solids
(SS) |
Intervals between 2 Sets of Monitoring |
Not less than 36 hours |
7.9.1.1 The Action and Limit Levels for water quality are defined in Table 7.5 below.
Table 7.5 Action and Limit Levels for water quality
Parameters |
Action Level |
Limit Level |
DO in mg/L (Surface,
Middle & Bottom) |
Surface
and Middle 5 percentile of
baseline data. [1] Bottom 5
percentile of baseline data |
Surface
and Middle 4 mg/L or 1
percentile of baseline data. [1] Bottom 2
mg/L or 1 percentile of baseline data |
SS in mg/L |
95 percentile of
baseline data or 120% of upstream
control station. [2] |
99 percentile of
baseline data or 130% of upstream control station. [2] |
Turbidity in NTU
|
95 percentile of
baseline data or 120% of upstream
control station. [2] |
99 percentile of
baseline data or 130% of upstream
control station. [2] |
Notes:
[1] For DO, non-compliance occurs when monitoring
results is lower than the limits.
[2] For SS and turbidity, non-compliance
occurs when monitoring results is larger than the limits.
7.10.1.1 Should non-compliance of the criteria occur, action in accordance with the Action Plan in the Table 7.6 below shall be carried out.
Table
7.6 Event and Action Plan for water quality
Event |
Action |
|||
ET |
IEC |
ER |
Contractor |
|
Action level
exceedance for one sampling day |
1. Inform IEC, Contractor and ER; 2. Check monitoring data, all plant, equipment and
Contractor’s working methods; and 3. Discuss remedial measures with IEC and Contractor
and ER. |
1. Discuss with ET, ER and Contractor on the
implemented mitigation measures; 2. Review proposals on remedial measures submitted
by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with IEC, ET and Contractor on the
implemented mitigation measures; 2. Make agreement on the remedial measures to be
implemented; 3. Supervise the implementat-ion of agreed remedial
measures. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification of the
non-compliance in writing; 3. Rectify unacceptable practice; 4.Check all plant and equipment; 5. Consider changes of working methods; 6. Discuss with ER, ET and IEC and purpose remedial
measures to IEC and ER; and 7. Implement the agreed mitigation measures. |
Action level
exceedance for more than one consecutive sampling days |
1. Repeat in-situ measurement on next day of
exceedance to confirm findings; 2. Inform IEC, contractor and ER; 3. Check monitoring data, all plant, equipment and Contractor’s
working methods; 4. Discuss remedial measures with IEC, contractor
and ER 5. Ensure remedial measures are implemented |
1. Discuss with ET, Contractor and ER on the
implemented mitigation measures; 2. Review the proposed remedial measures submitted
by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with ET, IEC and Contractor on the
proposed mitigation measures; 2. Make agreement on the remedial measures to be
implemented ; and 3. Discuss with ET, IEC and Contractor on the
effectiveness of the implemented remedial measures. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification of the
non-compliance in writing; 3. Rectify unacceptable practice; 4. Check all plant and equipment and consider
changes of working methods; 5. Discuss with ET, IEC and ER and submit proposal
of remedial measures to ER and IEC within 3 working days of notification; and
6. Implement the agreed mitigation measures. |
Limit level
exceedance for one sampling day |
1. Repeat measurement on next day of exceedance to
confirm findings; 2. Inform IEC, contractor and ER; 3. Rectify unacceptable practice; 4. Check monitoring data, all plant, equipment and
Contractor’s working methods; 5. Consider changes of working methods; 6. Discuss mitigation measures with IEC, ER and
Contractor; and 7. Ensure the agreed remedial measures are
implemented |
1. Discuss with ET, Contractor and ER on the
implemented mitigation measures; 2. Review the proposed remedial measures submitted
by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with ET, IEC and Contractor on the
implemented remedial measures; 2. Request Contractor to critically review the
working methods; 3. Make agreement on the remedial measures to be
implemented; and 4. Discuss with ET, IEC and Contractor on the
effectiveness of the implemented remedial measures. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification of the
non-compliance in writing; 3. Rectify unacceptable practice; 4. Check all plant and equipment and consider
changes of working methods; 5. Discuss with ET, IEC and ER and submit proposal
of additional mitigation measures to ER and IEC within 3 working days of
notification; and 6. Implement the agreed remedial measures. |
Limit level
exceedance for more than one consecutive sampling days |
1. Inform IEC, contractor and ER; 2. Check monitoring data, all plant, equipment and
Contractor’s working methods; 3. Discuss mitigation measures with IEC, ER and
Contractor; and 4. Ensure mitigation measures are implemented; and 5. Increase the monitoring frequency to daily until
no exceedance of Limit Level for two consecutive days |
1. Discuss with ET, Contractor and ER on the
implemented mitigation measures; 2. Review the proposed remedial measures submitted
by Contractor and advise the ER accordingly; and 3. Review and advise the ET and ER on the
effectiveness of the implemented mitigation measures. |
1. Discuss with ET, IEC and Contractor on the
implemented remedial measures; 2. Request Contractor to critically review the
working methods; 3. Make agreement on the remedial measures to be
implemented; 4. Discuss with ET and IEC on the effectiveness of
the implemented mitigation measures; and 5. Consider and instruct, if necessary, the
Contractor to slow down or to stop all or part of the dredging activities
until no exceedance of Limit level. |
1. Identify source(s) of impact; 2. Inform the ER and confirm notification of the
non-compliance in writing; 3. Rectify unacceptable practice; 4. Check all plant and equipment and consider changes
of working methods; 5. Discuss with ET, IEC and ER and submit proposal
of additional mitigation measures to ER and IEC within 3 working days of
notification; and 6. Implement the agreed remedial measures. 7. As directed by the ER, to slow down or stop all
or part of the dredging activities until no exceedance of Limit level. |
Notes:
ET – Environmental Team
IEC – Independent Environmental Checker
ER – Engineer’s Representative
Each step of actions required shall be implemented
within 1 working days unless otherwise specified or agreed with EPD.
The water quality at TCE-WQM2b should be dominated by
the operation of CMP. In case exceedance is recorded, the ET shall collate the
monitoring data for CMP and evaluate the possible causes of the exceedance.
8.1.1.1 An assessment of potential impacts due to the sewage arising from the proposed Project has been assessed in Section 6 of the EIA Report.
8.2.1 Construction Phase
8.2.1.1 The sewage generated during the construction stage from the on-site workers will be collected in chemical toilets and disposed of off-site. Therefore, no sewerage impacts are expected from the site during the construction phase. As such, environmental monitoring and audit of the sewerage system is considered not required.
8.2.2 Operational Phase
8.2.2.1
Due to the key concerns of the ecological
sensitivity of the Tung Chung Stream and Tung Chung Bay, the following
provisions are proposed to enhance the sewerage network reliability and
minimize environmental impacts due to system failure or in case of emergency
situations.
8.2.2.2
Twin rising mains would be provided for
proposed discharge from all proposed SPSs and the upgraded CMRSPS. It is proposed to use both
mains as duty from an economical and operational point of view. Should one of
the duty mains be taken out of operation, the remaining one would deliver more
flow at a higher velocity (exceeding 3m/s) during a temporary period of repair.
Twin gravity sewers would also be provided at the downstream of the inlet break
chamber for all proposed SPSs and the upgraded
CMRSPS.
8.2.2.3
It is proposed to adopt high density
polyethylene (HDPE) pipe for proposed gravity sewers and rising mains.
As gravity sewers will not be pressurized, they carry no risk of bursting.
Further protection on proposed rising mains with concrete surround will be
provided to mitigate the risk of bursting.
8.2.2.4
With the above measures, bursting discharge
from gravity sewers and rising mains is not anticipated as discussed and agreed with DSD and EPD.
Additional
Provisions for Tung Chung West Development
8.2.2.5
Taking into account the ecological
sensitivity of the Tung Chung Stream, the occurrence of a possible emergency
event at the SPSs in TCW (including TCV West SPS, TCV North SPS, TCV
East SPS and Upgraded CMRSPS) has
been considered due to the following risks: pump failure; rising main failure;
and power failure.
8.2.2.6
To mitigate the risks of pump, rising
main and/or power failure, several mitigation measures are proposed to cater
for the emergency situations including a) 100% standby pumping capacity within
each SPS, with spare pump up to 50% pumping capacity stockpiled
in each SPS for any emergency use;
b) twin rising mains; c) dual-feed power supply; d) emergency
storage facilities up to 6-hours ADWF capacity; and e) emergency communication mechanism amongst
relevant government departments.
8.2.2.7
Considering the possible emergency
situations and respective risks, as well as the practicality of construction,
the above mitigation measures are considered the most appropriate
and practical measures to deal with the emergency situations
of the proposed SPSs in TCW development.
Therefore, based on these provisions emergency
discharge is not expected, and thus no adverse impact on water quality or
ecology due to emergency discharge from the proposed SPSs in TCW
development is anticipated.
Additional
Provisions for Tung Chung East Development
8.2.2.8
The occurrence of any single emergency
event at TCE East SPS and TCE West SPS has been considered due to the following
risks: pump failure; rising main failure; and power failure.
8.2.2.9
To mitigate the risks of pump, rising
main and/or power failure, several mitigation measures are proposed to cater
for the emergency situations including a) 100% standby pumping capacity within
each SPS, with spare pump up to 50% pumping capacity stockpiled
in each SPS for any emergency use;
b) twin rising mains; c) dual-feed power supply;
d) emergency storage facilities up to 6-hours ADWF
capacity; and e) emergency
communication mechanism amongst relevant government departments.
8.2.2.10
Considering
the possible emergency situations and respective risks, as well as the
practicality of construction, the above mitigation measures are considered the most appropriate and practical
measures to deal
with the emergency situations of the proposed SPSs in TCE
development. Therefore, based on these provisions emergency discharge from the proposed SPSs in TCE is not expected, and thus no adverse impact on
water quality or ecology due to emergency discharge from the proposed SPSs in TCE
development is anticipated.
8.2.2.11
In view of
the above mitigation measures, environmental monitoring and audit of the sewage
system is considered not required. The implementation schedule of the relevant
mitigation measures is presented in Appendix 4.1.
9.1.1.1 The quantity and timing for the generation of waste during the construction phase have been estimated. Measures including the opportunity for on-site sorting, reusing excavated materials etc, are devised in the construction methodology to minimise the surplus materials to be disposed off-site. Proper disposal of chemical waste should be via a licensed waste collector.
9.2.1.1 All the proposed mitigation measures are stipulated in the EIA Report and summarised in the EMIS in Appendix 4.1.
9.2.1.2 EM&A requirements are required for waste management during the construction phase only and the effective management of waste arising during the construction phase will be monitored through the site audit programme. The aims of the waste audit are:
·
To
ensure the waste arising from the works are handled, stored, collected,
transferred and disposed of in an environmentally acceptable manner; and
·
To
encourage the reuse and recycling of material.
9.2.1.3 The types and quantities of waste that would be generated during the operational phase have been assessed. It is anticipated there would not be any insurmountable impacts during the operational phase. A trip-ticket system should be operated to monitor all movements of chemical wastes which will be collected by a licensed collector to a licensed facility for final treatment and disposal. Recommendations have been made to ensure proper treatment and proper disposal of these wastes in the EIA Report and summarised in the EMIS in Appendix 4.1.
9.2.1.4
According to Section 7.3 in the EIA report a
Construction & Demolition Material Management Plan (C&DMMP) shall be
submitted to the Public Fill Committee (PFC) for approval in the case of
C&D materials disposal exceeding 50,000m3. The C&DMMP was
submitted to the PFC in June 2015 after being approved by the CEDD Vetting
Committee. The C&DMMP was approved by PFC on 18 September 2015.
9.2.1.5
According to Section 7.4 in the EIA report, the Contractor should prepare a
Waste Management Plan (WMP) as
part of the Environmental Management Plan (EMP) in accordance with the ETWB TC(W) No. 19/2005 for
construction phase. The EMP should be submitted to the Engineer for approval.
Mitigation measures proposed in the EIA Report and summarised in the EMIS
should be adopted.
9.3.1.1
The Contractor shall be required to pay
attention to the environmental standard and guidelines and carry out
appropriate waste management and obtain the relevant licence / permits for
waste disposal. The ET shall ensure that the Contractor has obtained from the
appropriate authorities the necessary waste disposal permits or licences including:
·
Chemical
Waste Permits / licenses under the Waste Disposal Ordinance (Cap 354);
·
Public
Dumping Licence under the Land (Miscellaneous Provisions) Ordinance (Cap 28);
·
Marine
Dumping Permit under the Dumping at Sea Ordinance (Cap 466); and
·
Effluent
Discharge Licence under the Water Pollution Control Ordinance; and
·
Approval
of Construction
& Demolition Material Management Plan (C&DMMP).
9.3.1.2
The Contractor shall refer to the relevant booklets issued by the DEP
when applying for the licence/permit and the ET shall refer to these booklets
for auditing purposes.
9.4.1.1
Regular audits and site inspections should be carried out during
construction phase by the ET to ensure that the recommended good site practices
and other recommended mitigation measures are properly implemented by the
Contractor. The audits should concern all aspects of on-site waste management practices including waste
generation, storage, recycling, transport and disposal. Apart from site inspection, documents
including licences, permits, disposal and recycling records should be reviewed
and audited for compliance with the legislation and contract requirements.
9.4.1.2
The requirements of the environmental audit programme are set out in Section 15 of this Manual. The audit
programme will verify the implementation status and evaluate the effectiveness of the
mitigation measures.
10.1.1.1 The EIA Report has assessed the land contamination associated with the Project.
10.2 Proposed Site Investigation for Potentially Contaminated Areas
10.2.1.1 As outlined in Sections 8.3
and 8.4 of the EIA report, 4 surveyed
sites, i.e. TC-1, TC-4. TC-9 and TC-10 were identified to have potentially
contaminated land use and environmental site investigation (SI) was proposed. Within these areas, a total of 18 locations are
proposed for soil and groundwater sampling and testing according to the EPD’s Practice Guide for
Investigation and Remediation of Contaminated Land.
10.2.1.2 As the 4 potentially contaminated sites are located in private land lot, SI is unlikely to be carried out at this stage. In addition, as the sites are still in operation, it is considered not worthy to carry out the SI at this stage as on-going activities would make the assessment result obsolete. It is recommended that further site visit be carried out by the PP’s appointed consultant once the future development of this site is confirmed and site access is available (e.g. after land resumption), in order to identify the need for SI for any additional hot spots as a result of the on-going activities. The PP’s appointed consultant would prepare and submit a supplementary Contamination Assessment Plan (CAP) to present findings of the further site visit for EPD review and approval prior to the commencement of the SI works.
10.3 Submission Requirements of CAR, RAP and RR
10.3.1.1 Following the completion of environmental SI
and lab testing works, the Project Proponent would prepare the Contamination
Assessment Report (CAR). The CAR would present the findings of the SI and
evaluate the level and extent of potential contamination.
10.3.1.2 If land contamination is identified during
the proposed environmental SI and remediation is required, a Remediation Action Plan (RAP) would be prepared.
10.3.1.3 A Remediation Report (RR) would also be prepared to demonstrate that the clean-up works are adequate. No construction / development works would be carried out within the potentially contaminated areas in the Study Area prior to the agreement of the RR.
10.3.1.4 The implementation schedule are summarised in the EMIS in Appendix
4.1.
11.1.1.1 The EIA has evaluated the ecological consequences of the Project and recommended ecological mitigation measures to avoid, minimize and compensate the impact arising from the Project.
Avoidance
11.2.1.1
Avoidance of recognised sites of
conservation importance - All
the recognised sites of conservation importance, including Country Parks, Sites of Special Scientific Interest (SSSIs),
Ecologically Important Streams (EISs), and existing / proposed Marine Parks have
been avoided and will not be encroached by any developments under the present Project.
11.2.1.2
Avoidance of Tung Chung Bay and associated high
value habitats - The
majority of the habitat types with high or higher ecological values have been
avoided. In the RODP, there will be no reclamation at TCW in order to protect the Tung Chung Bay. As
there is no reclamation inside Tung Chung Bay, the Tung Chung Bay (including
coastal waters and estuary of Tung Chung Stream) and associated habitats
including the seagrass beds, mudflats, mangroves habitats, will be preserved.
11.2.1.3
Avoidance of Tung Chung Stream - For terrestrial habitats, encroachment of
Tung Chung Stream has been avoided. All natural sections of Tung Chung Stream (including the two main branches and the joined outlet section) and one major tributary at Ngau Au have
also been provided with buffer zones to cover the riparian zone, except where overlapped with the road crossings of local distributors. The widths of buffer zones are in
general 30m (except locations without sufficient space) for the two main
branches and the joined outlet section, and in general 20m for the major tributary at Ngau Au. In principle, the buffer
zones should not be less than the recommended
widths except with constraints such as without
sufficient space or adjacent to existing
developed areas such as villages. The recommended widths of buffer zones are based
on the previous practices
for EIS and other
approved EIAs. For example, 30m buffer was
provided for Sha Lo Tung Stream SSSI. Lin Ma Hang Stream has been
designated as SSSI and is listed as one of the 33 EISs, and therefore the land corridor adjoining Lin Ma Hang Stream at the
downstream area where there had already been settlements/community is also
zoned "Green Belt" (~20m) to serve as a vegetated buffer to separate
the village area from the river. Buffer zones of 5-20m were established
in main streams on Kau Sai Chau for protection of habitats of aquatic fauna,
including the endemic Atyid shrimp Caridina
trifasciata during the construction works of the public golf course
extension (Black & Veatch 2005). Caridina
trifasciata are still found in these main streams during the construction phase as well as operation
phase monitoring for the public golf
course. In
the EIA study “North East New Territories New Development Areas Planning and
Engineering Study – Investigation”, Ma Tso Lung Stream was ranked as high
ecological value in the upper and midstream sections, and a
buffer zone of 15-30 m is proposed
and considered appropriate.
Minimization
11.2.1.4
Selection of Proposed Development Areas in TCW PDA -
Locations and extents of development parcels and other development areas in TCW
PDA have been selected and adjusted to avoid as far as possible and minimise
potential impacts to existing ecological resources. For example, developments
in Fong Yuen area are limited to the Northern section of Fong Yuen area, which
is more disturbed and fragmented, and thus of lower ecological value. The
Middle Section and the Southern Section, which are of higher ecological value,
were not proposed for developments and were zoned as Green Belt except a small
area of existing urbanised/disturbed inside the Southern Section.
11.2.1.5
Preservation of Habitats with Ecological Values - Conservation or non-development land uses such
as Conservation Area (CA) zoning, Coastal Protection Area (CPA) zoning, Green
Belt (GB) zoning, and Agricultural (Agr) zoning, were proposed for various locations
at TCW PDA. Developments within these zonings are basically prohibited. These
areas will include Middle and Southern Sections of Fong Yuen area, Fung Shui
Woods and part of the buffer zone of Tung Chung Stream.
11.2.1.6
Fung Shui
Woods which fall within the RODP boundary will be covered by either CA or GB,
except those in “V” land use zones which are following the current village area
boundaries. Fung Shui Woods considered of higher ecological value (i.e.
moderate to high) due to larger sizes and/or better conditions are covered by
CA, while those of lower ecological value (i.e. moderate) due to smaller sizes
or higher disturbance level are covered by “GB”.
11.2.1.7
The buffer
zone for Tung Chung Stream will be zoned as “CA”, ‘CPA”, or “OU” except where overlapped with road crossings. For CA and CPA, only development needed to support
the conservation of the existing landscape of scenic quality of the area or are
essential infrastructure projects with overriding public interest may be
permitted,
such as the outlets of
the Stormwater Attenuation and Treatment Ponds. For OU, this zoning is mainly proposed for polders and the future
River Park. Though construction works will be required for the outlets, the polders and/or the future
River Park, the scale of the construction works would not be large and
mitigation to prevent site runoff affecting stream courses have been proposed
under water quality assessment. Furthermore, these future polders and River
Park would be managed by Government after construction, and could thus better
protect the stream, and the Stormwater Attenuation and Treatment Ponds will have wetlands
incorporated and could provide additional habitats for fauna. As Enhancement Measures, native
riparian tree and shrub species will also be planted on the earth-line polders and aquatic plants will be
planted in biofiltration zone of Stormwater Attenuation and Treatment Ponds.
11.2.1.8
Non-development
zoning on the RODP has been
provided along a large section of Tung Chung
Bay coastline such as CPA (as buffer zone) and RO/DO (with
purpose-designed paths and landscape areas) to reduce potential disturbance
impacts to the nearby natural habitats such as mangroves and mudflats in Tung
Chung Bay, especially from the potential increase of visitors.
11.2.1.9
Limiting Works near Tung Chung Stream - Limited crossings for Tung Chung Stream would be
required. It is understood the stream bed and stream banks would not be
encroached, and the detail design would continue to explore suitable design so
as to avoid the buffer zone as far as possible.
11.2.1.10 Refinement of Road Alignment/Design to Minimize Impact on Fung Shui Woods - Small areas (0.04 ha) of Fung Shui Wood loss (near the crossing of Tung Chung Stream eastern branch, and near TCV-5b) will be caused by the road upgrading along the existing Shek Mun Kap Road due to the space constraints. It is recommended that during the later detailed design stage or construction stage, efforts should be made to reduce or even avoid the impact on Fung Shui Woods as far as possible, subject to the later refinement of the alignment, the layout design, and the number and locations of trees to be proposed felling.
11.2.1.11 Noise
Barrier & Bird Collision – In order to minimise the potential impact of bird collision, only solid
noise barrier will be used during construction phase. Noise barrier will only be erected at a few
locations in the TCE PDA and TCW PDA during operation phase. Transparent noise barrier will be avoided as
far as possible. If transparent panel
will be used, stickers or other measures will be applied to increase the
visibility of the panels to birds.
11.2.1.12 Reduction of the Reclamation Sizes - The total reclamation size under this Project has also been significantly reduced after the reclamation inside Tung Chung Bay was removed. On comparing to the original scheme with 50ha reclamation, the current scheme with the removal of TCW reclamation, has prevented loss or encroachment of ecological resources or deteriorations of water quality condition in Tung Chung Bay. The potential direct impact from reclamation has been minimised.
11.2.1.13 Location of the Reclamations - The entire TCE PDA development as well as the Road P1 (Tung Chung - Tai Ho Section) are on new reclamations. The footprint of the proposed reclamations is at the location among the lowest use, if not none, by CWD inside North Lantau waters, and is not found to be important for other marine fauna of conservation importance.
11.2.1.14 Adopting Non-dredged Method - In order to minimize the potential impacts caused by the reclamation, a number of alternative construction methodologies has been critically examined. After considering all the options such as fully dredged, partially dredged and non-dredged methods for seawall construction and reclamation, non-dredged method for both the seawall construction and reclamation are recommended. By adopting non-dredged method, several potential impacts have been minimised. The disturbance of seabed sediments will be greatly reduced without the dredging process, and the water quality impacts caused by suspended solid or sediment plumes will be minimised. This construction method also minimizes the generation of dredged materials, and in turn reduces the marine vessel trips for transportation of dredged materials, and finally reduces the potential of off-site impacts such as the associated impacts on water quality and marine ecology near the disposal facilities.
11.2.1.15 Maintaining Tai Ho Wan outlet - The design of the reclamation has taken into account the importance of the existing Tai Ho outlet for the ecology of Tai Ho Wan, and has minimized the extent of reclamation for Road P1, and maintaining the opening of the outlet in the new reclamation.
11.2.1.16 Avoiding the overlapping of construction programmes with concurrent projects – during the EIA study, the known and anticipated construction programmes of other concurrent projects have been examined. Based on the available information, the currently proposed reclamation construction programme for the present Project only overlaps with two concurrent marine projects, i.e. 3RS and the CMP at East Sha Chau. This has minimized the implications on water quality impacts due to concurrent projects.
11.2.1.17 No emergency discharge in TCE and TCW –
Sewage pumping stations will be present in TCE and TCW, but there will be back
up measures and suitable designs to prevent emergency discharge accidents.
11.2.1.18 Reducing the Capacity of the Proposed Marina – The scale of the proposed marina in TCE PDA has been reduced from a capacity for 350 vessels to the currently proposed capacity for 95 vessels.
Mitigation
11.2.1.19
Compensation Woodland Planting is proposed to mitigate the woodland loss
(total 5.72 ha, including 5.3ha
from TCW PDA and 0.42 from the service reservoirs) and a small loss of Fung
Shui Wood (0.20 ha). A search of area to mitigate the loss of woodland has been
conducted. Priority has been given to the practicability of compensation of
woodland within the boundary of RODP. Given the nature of the project is to
provide development opportunities to satisfy the needs for the society in
general and the aspirations of local communities (see Section 2 of the
EIA report), compensation of
woodland is only possible for the areas beyond the RODP. Efforts have been also
been expedited to identify locations that would be suitable for woodland
compensation. After considering a number of requirements such as the existing vegetation cover, the accessibility
for planting and future maintenance, and the ecological linkage with other
existing habitats after the compensation woodland is established, it is considered that the areas adjoining
the woodlands near the existing service reservoirs, and
hillsides to the east of Tung Chung Road, would be suitable locations.
The advantage of these locations is that there are existing woodlands
immediately downhill to the location and the Sheung Ling Pei Fung Shui Wood is
further downhill behind Sheung Ling Pei Village, planting new woodland areas
adjoining existing woodlands would form an ecological linkage and increase the
overall habitat size and hence would help to enhance the biodiversity and
ecological values in the long run. And it is noted that the compensation trees
for landscape impacts will also be planted near the future service reservoirs.
With woodland compensation on the hillsides to the east of Tung Chung Road,
further ecological linkage could be formed.
These 3 major areas, of a total area about 11 ha, which have been
identified as suitable for compensation woodland planting are illustrated in Figure 9.11 of the EIA report. The selected locations are grassy/shrubby with little tree cover. The slope gradients ranged between 20o
to 30o. Tree whips and shrub
seedlings would be used for the planting mix. The feasibility of commencing woodland
compensation planting as soon as practicable should be considered. The tree species to be planted should mostly be
native species recorded at the Assessment Area (e.g. those reported in Appendix 9.2 of the EIA report) for woodland compensation, and
the two areas uphill to Sheung Ling Pei should also make reference to the
existing tree species reported in FSW habitat. A list of plant species
recommended for compensatory woodland planting is provided in Appendix 9.21 of the EIA report.
Early and timely arrangement with forest nursery for propagation of the
seedlings should be made to ensure the availability of both the species and the
quantity required.
11.2.1.20
With the 11 ha
of compensation woodland, it is sufficient to mitigate the loss of about 6 ha
of woodland and FSW from TCW PDA and service reservoirs. In addition to the
native species, the planting list will also contain some fruit tree species
which could provide habitats for wildlife including those reported in Orchard
habitats. In order to protect
the compensation woodland from potential disturbance by fires, fire resistant
species (e.g., Schima superba) will
be planted in the periphery. The compensation woodland will be maintained
by the project proponent (i.e. CEDD) for 10 years before handing over to the
government (i.e. Lands Department). The survival and conditions of the planted
trees should be inspected during the maintenance period and replant where
necessary.
11.2.1.21
Planting of Emergent Plant inside the future
River Park - River Park is proposed at Tung
Chung Stream, covering the full length of the channelized section together with
the immediate upstream natural section alongside Fong Yuen area up to Shek Mun
Kap Road. Though detailed design of the River Park has not been confirmed at
this stage, it is anticipated that planting and features beneficial for ecology
will be provided. It is suggested planting of emergent plant species including
the larval food plant of the rare butterfly species Jhora Scrub Hopper, i.e. Leersia hexandra, should be provided in
the future River Park, to provide habitats for this butterfly, and to
compensate the loss of their habitats (wet abandoned agricultural land) in
northern section of Fong Yuen. Currently the River Park covers an area size of
about 3.98 ha, with about 3.3 ha land area (if excluding area of watercourses),
and in which there is 1.25 ha of existing urbanised/disturbed area. It is
suggested that at least 0.5 ha of emergent planting should be included in the
future design of the River Park. A list of recommended plant species for the
future River Park is shown in Appendix 9.22 of the EIA
report. It is recommended that the future
operator of the River Park should make reference to the recommended plant list
when designing the landscape and make early arrangement for the availability
and sufficient quantity of suitable plant species.
11.2.1.22
Capture and Translocation Exercise - Within the PDA of TCW, amphibian species of
conservation importance were recorded in some areas to be directly disturbed
during construction phase, and mitigation measures are recommended. Romer’s Tree Frogs were mainly recorded near
the eastern branch of Tung Chung Stream, inside or near orchard and woodland
habitats. Chinese Bull Frog was found in
orchard near Shek Mun Kap. Capture-and-translocation of amphibian species of
conservation importance will be implemented in areas with sightings prior to
site formation to minimize the impacts on these fauna species of conservation
importance.
11.2.1.23
The exercise
will cover areas for public works near the eastern branch of Tung Chung Stream,
in particular 1) the River Park, 2) the Distributor Road along the eastern
branch of Tung Chung Stream, 3) the road upgrade along the existing Shek Mun
Kap Road, and 4) the attenuation and treatment ponds in TCV-k, TCV-e, TCV-l,
TCV-c, and TCV-n. Capture-and-translocation exercise for those public works
will be provided before site formation commences by the government departments
responsible for the construction of those public works or the site formation
works for those sites.
11.2.1.24
Capture-and-translocation
exercise of amphibian species of conservation importance will also be required
in TCV-1 and TCV-5 which are zoned for residential/commercial developments by
private developers and the lands within mostly belong to private lots. The
future project proponents of those private lots shall be requested to conduct
capture-and-translocation exercise prior to site formation via the established
mechanism for land transaction application. The requirements of these measures
will be stipulated in the explanatory statement of the OZP.
11.2.1.25
The above
public works and development parcels for residential are near the eastern
branch, and cover the sighting locations, and are thus suitable for
capture-translocation survey. The survey
should be undertaken by ecologists with relevant experience. Besides the primary target of Romer’s Tree
Frog and Chinese Bull Frog, other amphibian species of conservation importance
should also be translocated if encountered during the capture survey. Captured individuals will be released to
suitable habitats with no or low records of these species during the surveys
(e.g., Chinese Bullfrog: agricultural land in San Tau; Romer’s Tree Frog:
woodland along the path to San Tau).
Romer’s Tree Frogs captured in Chek Lap Kok were translocated to seven
recipient sites with suitable habitats but no record of this species (Chan et al. 2005).
11.2.1.26 There are proven track records of translocation of amphibians in Hong Kong. Capture-and-translocation exercise of Romer’s Tree Frog had been conducted previously during the construction of the Hong Kong International Airport in Chek Lap Kok (Lau 1998). Post monitoring surveys showed that the populations were established in translocation. Capture-and-translocation exercise of Romer’s Tree Frog were also conducted during the construction stage of drainage improvement project in Mui Wo (Ecosystems Ltd. 2009).
11.2.1.27 Habitats of Romer’s Tree Frog will not be affected in the PDA at TCE, and hence capture-and-translocation exercise will not be necessary. Romer’s Tree Frogs were also recorded in area not be affected by construction works such as those to be zoned as CPA, and ravine woodland at upper section of Wong Lung Hang Stream. No capture-and-translocation exercise is needed for these areas.
11.2.1.28 Two criteria stated in Lau (1998) will be used in
the selection of translocation sites of Romer’s Tree Frog. These included 1) a large area of forest or
plantation; 2) suitable breeding habitats, i.e., shaded, slow-flowing or
standing waters with plenty of leaf litter.
For Chinese Bullfrog, locations with their preferred habitats (e.g.,
ponds, cultivated lands, streams, marshes) (Chan et al. 2005) will be selected as translocation sites.
Preservation and/or
Transplantation of Plant Species of Conservation Importance
11.2.1.29 Preservation and/or Transplantation of plant
species of conservation importance, including Aquilaria sinensis, Pavetta
hongkongensis, and Gmelina chinensis. will be conducted before site formation
works. Though Goodyera procera and Gymnosphaera hancockii were not
recorded in the present EIA study, if found before site formation works, these
species will also be preserved and/or transplanted. Priority should be given to
on-site preservation, especially for large sized individuals, and followed by
transplantation, which is more feasible for small-sized individuals/seedlings.
11.2.1.30 Preservation and/or Transplantation of plant
species of conservation importance will cover all areas for public works,
provided before site formation commences by the government departments
responsible for the construction of those public works or the site formation
works for those sites. This measure will also be required in TCV-1 in where
plant species of conservation importance were recorded, and which are zoned for
residential/commercial developments by private developers and the lands within
mostly belong to private lots. The future project proponents of those private
lots shall be requested to conduct preservation and/or Transplantation of plant
species of conservation importance prior to site formation via the established
mechanism for land transaction application. The requirements of these measures
will be stipulated in the explanatory statement of the OZP.
Defining and Maintaining
Construction Site Boundaries
11.2.1.31 Site hoarding should be erected along the interface with natural terrestrial habitats of moderate to high / high ecological value (including secondary woodland, Fung Shui Wood, natural section of Tung Chung Stream), if any, to properly delineate the works site boundary and screen and minimise the potential disturbance due to construction activities to the nearby habitats and associated terrestrial fauna during construction phase. In addition, erecting of site hoarding along northern section of Fong Yuen (i.e. TCV-6) is also recommended since sighting records of the rare butterfly Jhora Scrub Hopper were aggregated in the northern end of the middle section of Fong Yuen.
11.2.1.32 Fences will be installed along the buffer zones of the Tung Chung Streams, mature woodland and Fung Shui Wood to minimise trespassing to these habitats and plants of conservation importance close to the site boundary.
11.2.1.33 Access Roads: The development areas will be mostly accessed by existing road network during both construction and operational phases. The temporary or permanent loss of habitats due to construction of temporary or permanent access is kept to minimum.
Protection of Tung Chung
Stream
11.2.1.34 Construction Works near Tung Chung Stream: Though encroachment on natural sections of Tung Chung Stream has been avoided, there will be developments in Tung Chung Valley and the site runoff might potentially disturb Tung Chung Stream. According to the RODP, an approximate 30m buffer zone for the natural sections of Tung Chung Stream and an approximate 20m buffer zone for the major tributary near Ngau Au will be zoned as “CA”, “CPA”, or “OU” (for polders and the future River Park), except the road crossing locations. Precast structures or other similar approaches will be used as far as possible to minimize the potential pollution from construction works. There will also be polders to be constructed for some sections of Tung Chung Stream. But the polders will be located at the landward side of the buffer zone and thus there will still be some distances to the stream channels. With the buffer zone, together with good site management which are stipulated in ProPECC PN1/94 and will be fully implemented so that the treated runoff will be discharged to public drainage system in compliance with the WPCO.
11.2.1.35 Road Crossings at Tung Chung Stream and Polder Construction: The local distributors will be extended to connect to existing villages like Ngau Au, Lam Che, Nim Yuen and Mok Ka. Although a few sections of these local distributors (in a form of bridge deck) will have to span over the Tung Chung Stream and its tributaries, only the footings of the bridge deck, which are considerably small in size, will be located within the area above high water mark near the stream banks. Considered that there is only relatively limited works for the footing construction and the area affected would likely be the area above high water mark with relatively less disturbance on ecological habitat. Precast structures or other similar approaches will be used as far as possible to minimize the potential pollution from construction works. Good site management as stipulated in ProPECC PN1/94 will be fully implemented so that the treated runoff will be discharged to public drainage system in compliance with the WPCO. Adverse impact on Tung Chung Stream is not anticipated.
11.2.1.36 It is recommended that the design of crossings (likely to be in the form of bridges) should be reviewed at the detailed design stage of the project to determine the optimum design to minimise construction and operational phase impacts on Tung Chung Stream and on fauna using the stream courses. Design and construction parameters should be reviewed to address the following requirements and objectives:
· Maximization of the span of bridge piers to span over the stream course
· Minimization of the sizes of any piers within the 30m buffer zone
· Avoidance and minimization of changes to the hydrological regime of the stream courses; including avoidance of changes to flow of streams
· Minimization of the duration of construction, by giving consideration to off-site pre-fabrication of bridges and bridge elements
· Construction of each crossing will be scheduled so as there is no overlap, in order to reduce disturbance impacts
11.2.1.37 Similar exercises should be conducted for the polders at the detailed design stage of the project, to address the following objectives:
· Minimization of the duration of construction,
· Construction of the polders or section of polders will be scheduled to minimize overlapping or limit the works fronts, in order to reduce disturbance impacts
· To schedule the construction within dry season as far as possible
· Avoidance and minimization of changes to the hydrological regime of the stream courses; including avoidance of changes to flow of streams
11.2.1.38 During the construction phase, a temporary drainage system would be implemented to ensure that the surface run-off with high concentration of suspended solid (SS) would not be discharged to Tung Chung Stream. Runoff would need to pass through sedimentation tanks to reduce the concentration of SS. DSD Technical Circular No. 2/2004 and ETWB TCW No. 5/2005 which set out for the protection of natural rivers and streams from adverse impacts arising from construction works should be followed during construction works near streams. In accordance with the Practice Note for Professional Persons on Construction Site Drainage, Environmental Protection Department, 1994 (ProPECC PN 1/94), best management practices should be implemented on site as far as practicable to control site runoff and drainage at all work sites during construction.
Other Site Practices
11.2.1.39 Standard Site Practices listed as follows would be implemented to minimise potential impacts, including dust, noise and site runoff, on the surrounding environment.
· Regular checking should be undertaken to ensure that the work site boundaries are not exceeded and that no damage occurs to surrounding areas;
· Implementation of mitigation measures specified in ProPECC PN 1/94 to control site runoff and drainage at all work sites during construction;
· Implementation of noise control measures at all construction sites to reduce impacts of construction noise to wildlife habitats adjacent works areas;
· Implementation of dust control measures at all construction sites to minimise dust nuisance to adjacent wildlife habitats during construction activities;
· Construction debris and spoil should be covered up and/or properly disposed of as soon as possible to avoid being washed into nearby waterbodies by rain;
· Good site practice and site precautionary measures will also be implemented to avoid the potential impact due to site runoff. Construction effluent, site run-off and sewage should be properly collected and/or treated. Wastewater from a construction site should be managed with the following approach in descending order;
· Proper locations for discharge outlets of wastewater treatment facilities well away from the natural streams/rivers should be identified; and
· Effluent monitoring should be incorporated to make sure that the discharged effluent from construction sites meets the effluent discharge guidelines;
· Supervisory staff should be assigned to station on site to closely supervise and monitor the works.
11.2.1.40 With the implementation of good site practice, the potential impact due to dust, noise and site runoff during construction phase is anticipated to be acceptable.
Prevention of Emergency
Discharge in Proposed and Upgraded Sewage Pumping Stations in TCE and TCW
11.2.1.41 There will
be no emergency discharge from the proposed and upgraded sewage pumping
stations in TCE and TCW, for the protection of ecological sensitive receivers
of Tung Chug Stream and Tung Chung Bay. The following mitigation measures /
additional provisions are proposed to enhance the sewerage network reliability
and minimize the environmental impacts due to system failure or in case of
emergency situations:
· 100% standby pumping capacity within each SPS, with spare pump up to 50% pumping capacity stockpiled in each SPS for any emergency use;
·
Twin rising mains;
·
Dual-feed power supply;
·
Emergency storage facilities up to 6-hours ADWF
capacity; and
·
Emergency communication mechanism amongst relevant
government departments.
11.2.1.42 With the
implemented mitigation measures, emergency discharge of sewage from the proposed
SPSs in TCE and TCW is not anticipated.
11.2.1.43 Furthermore, in order to prevent pipe bursting, it
is proposed to adopt high density polyethylene (HDPE) pipe for proposed gravity
sewers and rising mains. As gravity sewers will not be pressurized, they
carry no risk of bursting. Further protection on proposed rising mains with
concrete surround will be provided to mitigate the risk of bursting. With the
above proposed measures, bursting discharge is not expected and no adverse impact on ecology
due to bursting discharge is anticipated.
Eco-shoreline
11.2.1.44 There would be inevitable permanent losses of marine waters (sub-tidal soft bottom seabed and water column), and direct impacts on existing artificial seawalls due to the reclamation. For the direct impact on artificial seawalls, as they are of low ecological value, the impact is considered insignificant and specific mitigation measure is not required, and there will be new seawalls of longer length on the future new reclamations. The permanent losses of marine waters, given the relatively larger sizes, are considered Minor to Moderate, and provision of mitigation measures is recommended.
11.2.1.45
The present proposed reclamation location has taken into account the
constraints and avoided sensitive ecological resources such as Tung Chung Bay and Tai Ho Wan in the area and is located in the
waters of very low dolphin use, therefore the impact would be the loss of
common marine waters habitats. If the design of the future seawall could be
improved to provide higher ecological functions than normal seawalls, it is
expected that the enhanced functions from the future seawalls could mitigate
the impact of the loss.
11.2.1.46 Adopting Eco-shoreline design - An ‘eco-shoreline’ is any shoreline which provides beneficial functions to the local ecosystem through a range of active or passive solutions, whilst providing coastal protection. As discussed above, the proposed reclamation in TCE PDA and that for Road P1 (Tung Chung - Tai Ho Section) Extension would be constructed along the existing artificial seawall. While the original artificial seawall has limited ecological values, due considerations have been given to consider the practicability of enhancing these new artificial seawall by providing eco-shoreline, which would help to provide better ecological functions as compared to the existing artificial seawall. It is however noted that the western artificial seawall of TCE PDA would be close to the marine navigation channel which would constrain the implementation of eco-shoreline. For the new artificial seawall along the Road P1 (Tung Chung - Tai Ho Section) Extension, the possibility of implementing eco-shoreline would be relatively more favourable. The extent of the future eco-shoreline covering the coastline of Road P1 (Tung Chung - Tai Ho Section) as well as the eastern coastline of TCE-PDA up to the opening of the marina is considered feasible and hence recommended.
11.2.1.47 While there are a number of variations on the approach of designing eco-shoreline, it is expected that the eco-shoreline (e.g. a sloping rip-rap form) could provide suitable habitats for colonization of intertidal and subtidal epifauna and juveniles of marine fauna and thereby effectively enhance the ecological function of the new seawalls. If feasible, a strip of platform with muddy substrates could be incorporated into the sloping seawalls, to further facilitate the colonisation of estuarine plants and soft substrate fauna. It is therefore recommended that during the detailed design of the reclamation, a study should be conducted to investigate the proper form of eco-shoreline to be adopted for the artificial seawall along the reclamation for TCE PDA and Road P1 (Tung Chung - Tai Ho Section) Extension, and to devise the implementation scheme for incorporation into the reclamation construction programme. An Eco-shoreline study report covering the recommendations of the proper form of eco-shoreline to be adopted, the detailed design of the eco-shoreline and the implementation programme will be submitted for the approval of the authority before commencement of reclamation works.
Mitigation for Marine Water
Quality
11.2.1.48 Based on the latest design, the use of non-dredged reclamation method is adopted. Should dredging be inevitable , suitable mitigation measures to the dredging activities should be implemented in accordance the recommendations proposed under Water Quality chapter of the EIA report.
11.2.1.49 Silt curtains have been proposed as mitigation for reclamation works. Other possible mitigation measures for inevitable dredging, if any, include using closed grab dredgers and control of dredge rate. Reduction in dredging rate (which in turn would prolong the dredging duration) will decrease the dispersion of suspended solids.
11.2.1.50 Besides, the number of concurrent dredging/filling work fronts should be limited, and the seawall should be constructed prior to the filling works. All reclamation filling works should be conducted within a leading seawall of 200m or enclosed by seawall.
11.2.1.51 The dredged marine sediment may contain organic materials and lead to a decreased in dissolved oxygen. Re-suspension of seabed sediment might potentially incur the release of contaminants, if any, into the seawater. If contaminants are present in the seawater, they may eventually be taken up into food chains. As non-dredged reclamation method was adopted, dredging activities would be limited. The above-mentioned mitigation measures for the dredging activities could further mitigate the DO depletion or the potential release of contaminants.
11.2.1.52 Good Site Practices for Water Quality in Marine Works – Good site practices shall be applied for the
filling works, which are the largest
potential sources for marine water quality impacts.
· Water quality monitoring (including monitoring at two stations within the proposed The Brothers Marine Park) shall be implemented to ensure effective control of water pollution and recommend additional mitigation measures required;
· The decent speed of grabs shall be controlled to minimize the seabed impact and to reduce the volume of over-dredging according to the assumed filling rate in water quality assessment;
· A perimeter silt curtain shall be installed during the entire reclamation periods, and the integrity and effectiveness of all silt curtains should be regularly inspected;
· Barges or hoppers shall not be filled to a level which will cause overflow of materials or pollution of water during loading or transportation;
· Excess materials shall be cleaned from the decks and exposed fittings of barges before the vessels are moved;
· Plants should not be operated with leaking pipes and any pipe leakages shall be repaired quickly;
· Adequate freeboard shall be maintained on barges to reduce the likelihood of decks being washed by wave action;
· All vessels should be sized so that adequate clearance is maintained between vessels and the seabed in all tide conditions, to ensure that undue turbidity is not generated by turbulence from vessel movement or propeller wash; and
· The works shall not cause foam, oil, grease, litter or other objectionable matter to be present in the water within and adjacent to the works site.
11.2.1.53 Besides the above good site practices for filling works, there are also good site practices for pollution generated from general construction works and sewage from workforce. Effluent monitoring should be incorporated to make sure that the discharged effluent from construction sites meets the effluent discharge guidelines.
11.2.1.54 Strict enforcement on no-dumping - Restrictions prohibiting dumping of rubbish, food, oil, or chemicals should be strictly enforced. This should also be covered in the contractor briefings.
11.2.1.55 Spill response plan - There will also be a spill response plan if vessels operating in the works areas will be transporting oil or other hazardous chemicals. The oil spill response plan will have specific provisions for protecting marine ecological resources. Given these measures, the marine ecosystem in the area would be protected.
11.2.1.56 Maintenance Dredging during the operation of the Proposed Marina - The volume of dredged material would be relatively small as compared with the construction phase impact. As the SS release would be within a semi-enclosed bay, the dispersion of SS would be constrained locally. The SS impact to the closest receiver WSR 43 future seawater intake for Tung Chung, which is located 1.2km far away from the mouth of marina, is not anticipated. Silt curtain should be deployed to reduce the sediment dispersion from the dredging inside the marina.
Control and Minimisation of
Marine Traffic
11.2.1.57 Disturbance impact to dolphin due to increase of working vessels is ranked as Minor to Moderate. It is recommended that approaches to reduce the marine traffic, including using larger-sized barges, land transportation of materials, and also reuse of excavation and C&D materials from the land-based works of the present Project, should be adopted as mitigation.
11.2.1.58 Larger-sized Barges - If barges of larger sized are used, more filling materials could be carried in each trip of the barges and it could reduce the marine traffic volume during construction. The feasibility of using larger barges for carrying filling materials has been investigated. The largest barge may be up to 5,000 tonnes in capacity and could be equivalent of 10-20 normal sized barges. But the number of this type of barges available in the region at the time of the present proposed reclamation would be subject to various factors, and therefore it could not confirm at this stage the amount or proportion of filling materials could be taken up by larger barges. But it is anticipated that if larger barge and land transportation (see below) are adopted for filling materials, it can help to reduce some (not more than 10%) of marine traffic. In the construction stage, the future contractors will be requested to submit a “Proposal on Reducing Marine Traffic” to authorities for approval before commencement of filling works, in which the contractors will need to detail measures adopted to reduce the marine vessel trip numbers and the traffic volume (except those for marine site investigation and survey works given the relatively minor number), including using more larger sized barges. The future contractors will have the responsibility to take into account the best available information at that time to verify the market availability at the time of construction and to arrange larger barges as many as possible for transporting the filling materials for the Project.
11.2.1.59 Land Transportation of materials - Besides using larger barge, transportation of fill materials via land traffic is also possible to reduce the marine traffic. The present Project involves near shore reclamation and the site could be accessed by land transportation. The feasibility of using land transportation for carrying filling materials has also been investigated. The land traffic capacity of the Tung Chung area should be considered. And thus it is subject to approval by government departments on the quantity of fill materials could be taken up by land transportation. It is anticipated that if larger barge (see above) and land transportation are adopted for filling materials, it can help to reduce some (not more than 10%) of marine traffic. In the construction stage, the future contractors will be requested to submit a “Proposal on Reducing Marine Traffic” to authorities for approval before commencement of filling works, in which the contractors will need to detail measures adopted to reduce the marine vessel trip numbers and the traffic volume (except those for marine site investigation and survey works given the relatively minor number), including using more land transportation. The future contractors will have the responsibility to arrange and/or apply land transportation for transporting the filling materials for the Project.
11.2.1.60 Reuse of C&D materials –In accordance with the waste management assessment of the present EIA, based on the construction programme, all inert C& D materials would be reused on-site during the whole construction phase, including the reclamation works. All C&D materials arising from the construction would be sorted on-site to recover the inert C&D materials and promptly remove all sorted and processed material arising the construction activities. It is expected that, though the exact quantity could not be confirmed at this stage, by reusing the inert C&D materials, it could replace a portion of the fill materials and reduce the marine traffic for the fill transportation. In the construction stage, the future contractors will be requested to submit a “Proposal on Reducing Marine Traffic” to authorities for approval before commencement of filling works, in which the contractors will need to detail measures adopted to reduce the marine vessel trip numbers and the traffic volume (except those for marine site investigation and survey works given the relatively minor number), including reuse of C&D materials. The future contractors will have the responsibility to arrange and collect C& D materials for replacing part of the filling materials for the Project.
11.2.1.61 Speed
limits and regular routes of works vessels - The
potential of marine traffic disturbance or collision risk due to the
work-related vessel traffic flow during construction phase is also
considered. The potential of an
escalation in collision risk would be low as mainly large-sized and slower
vessels. (It is considered that the high-speed outboard engine boats pose
higher risk on collision.) But there still might be disturbance impact due to
the marine traffic. Further to the above
measures to reduce marine traffic volume, measures adopted by other EIAs for mitigating marine
traffic disturbance on CWD, such as speed limits and regular routes, will also be applied to
further mitigate the impact. In the construction stage, the future
contractors will be requested to prepare and submit a “Works Vessel Travel
Route Plan” to authorities for approval before commencement of filling works.
The submission will cover the routes, the speed limit, and other practices the
vessels need to adopt, except those for marine site investigation and survey
works given the relatively minor number. Works vessels should follow regular
routes to limit the extent of marine areas with works vessels traffic,
especially within PTBMP. It is recommended that the future travel routes of TCE PDA will avoid
and/or restrict the extents within ecologically sensitive areas targeted for
CWD conservation. Works vessels also need to follow all existing regulations,
restrictions, and practices for works
vessels (such as speed limits, and any other
practices). For examples, as part of the good site practices, the fill materials on
the barges should be properly loaded to avoid any overflow of materials. The bottom openings of the hoppers should be
properly maintained. The works
vessels will be requested to adopt more stringent standards when inside PTBMP.
For example, during normal circumstances, the works vessels should further
reduce the speed from 10 knot (the statutory vessel speed within marine parks)
to 8 knot. There should be no stopover or anchoring at the existing anchoring
area within PTBMP, even these actions are not prohibiting by regulations.
According to the latest planning of PTBMP, a Core Area around Siu Mo To will be
designated to provide the highest level of protection to prey sources of CWD
and fisheries resources. No works vessels will enter the core area of
PTBMP. The magnitude of any marine traffic disturbance impact would thus be
controlled.
Precautionary
Measures
11.2.1.62 Dolphin exclusion zone - As a precautionary measure, Dolphin exclusion zone of 250m radius is suggested to be implemented in the reclamation and dredging sites during the installation of the perimeter silt curtains and any re-deployment of the perimeter silt curtains. A dolphin watching plan will be implemented for the exclusion zone. Works should not be commenced until a 30 minute of no dolphin sighting is made within the exclusion zone and will be suspended when any CWD is found within the exclusion zone.
11.3.1.1 Site audits shall be undertaken during the
construction phase of the Project to check the proper implementation and maintenance of
recommended mitigation measures.
11.3.1.2 A project organisation consisting of the Engineer
Representative (ER), Independent Environmental Checker (IEC), Environmental
Team (ET), Project Proponent (CEDD) and Contractor should be established to take on the
responsibilities for environmental protection for the Project.
11.3.1.3 Site inspections shall be undertaken by the ET at
least once per week to checking the implementation of standard site practices and measures
of protection of natural streams (DSD
Technical Circular No. 2004).
11.3.1.4 Site inspection shall be undertaken by the ET at least
once per month to check if the constructions are encroached the buffer zone of
Tung Chung Stream.
11.3.1.5
Site hoardings and fences will be checked weekly by the ET. Damage
sighted should be reported to the site manager and damaged site hoarding/fence should be repaired by the Contractor as soon as possible.
11.3.1.6 Site
inspection shall be undertaken by the ET at least once per week to check the
implementation of standard site practices for marine works, strict enforcement
on no-dumping and spill response plan.
11.3.1.7 Site
inspection shall be undertaken by the ET at least once per week to check all
silt curtains are located entirely within the boundary of the temporary works
area and are still functioning.
11.3.1.8 Site
inspection shall be undertaken by the ET at least once per week during the
reclamation to check all reclamation filling works are within a leading seawall
of 200m or enclosed by seawall.
11.3.1.9 A
“Proposal on Reducing Marine Traffic” for size of barges, land transportation
of materials, and reuse of C&D materials, will be submitted by future
contractors. Site inspection shall be undertaken by the ET at least once per
week to check the implementation of the proposed items in the “Proposal on
Reducing Marine Traffic”.
11.3.1.10 A “Works
Vessel Travel Route Plan” will be submitted by future contractors. Site
inspection shall be undertaken by the ET at least once per week to check if the
works vessels follow the proposed routes and other requirements in the Plan.
11.3.1.11 Site
inspection shall be undertaken by the ET at least once per week to check if the
dolphin exclusion zone and dolphin watching plan are implemented in the
reclamation and dredging sites during the installation of the perimeter silt
curtains and any re-deployment of the perimeter silt curtains.
11.4.1 Monitoring for Compensation Woodland
11.4.1.1 A total area about 11 ha of compensation woodland planting will be
conducted to mitigate the loss of woodland,
Fung Shui Wood, and orchard. Three
proposed locations have been identified as suitable for compensation woodland
planting: two uphill to the Sheung Ling Pei
FSW, and one on the hillside to the east of
Tung Chung Road. All these areas are outside all development areas, and thus in
advance compensation planting is feasible and should be considered, especially
the two areas uphill to Sheung Ling Pei FSW.
11.4.1.2 Survival
and establishment of planted woodland at the three planting locations will be
monitored quarterly for 3 years. The monitoring surveys shall be carried out by
qualified botanist and ecologist. Survey
in each woodland planting location will commence three months after completion
of planting. Selected individuals of each planted species will be tagged and percentage survival computed.
Supplementary planting will be recommended when necessary. Wildlife use of the
planted woodland will also be monitored.
11.4.2
Monitoring for Emergent Plant inside the future River Park
11.4.2.1 Planting of emergent plant species including the
larval food plant of the rare butterfly species Jhora Scrub Hopper, i.e. Leersia hexandra, will be provided in the future River Park.
11.4.2.2 Survival
and establishment of planted emergent
plants in the future River Park will be monitored quarterly for 2 years. The monitoring surveys shall be carried out
by a qualified botanist and ecologist.
Survey in the future River Park will commence three months after
completion of planting. Selected individuals of each planted species will be checked and percentage survival computed. Supplementary
planting will be recommended when necessary. Wildlife use of the planted
vegetation will also be monitored.
11.4.3
Monitoring for Translocated Amphibians of
Conservation Importance
11.4.3.1 Amphibian species of conservation importance will be captured and translocated to suitable habitats prior to commencement of site formation. The capture-and-translocation exercise targets on species potentially impacted by construction activities, including Romer’s Tree Frog and Chinese Bullfrog.
11.4.3.2 Establishment of the translocated Romer’s Tree Frog and Chinese Bullfrog in the released location(s) will be studied. Post translocation monitoring shall be carried out by qualified ecologist.
11.4.3.3 The
establishment of translocated populations of Romer’s Tree Frog and Chinese
Bullfrog in the release sites will be determined by observations of occurrence
of reproduction during the breeding season following the
capture-and-translocation exercise. Both
Romer’s Tree Frog and Chinese Bullfrog breed between March and September in
Hong Kong (Chan et al. 2005). At least three surveys will be conducted in each release site during the
breeding season, preferably monthly between April and June, Signs of breeding
including calling males, eggs and tadpoles will be indications of breeding.
11.4.4
Monitoring for Preserved/Transplanted Plant Species of Conservation
Importance
11.4.4.1 Monitoring surveys will be conducted to verify and
evaluate the effectiveness of the preservation and transplantation programme.
11.4.4.2 For plant species of conservation importance, the
survival and conditions of transplanted plant individuals as well as
individuals to be preserved in-situ will be monitored. For transplanted
individuals, the monitoring will be two years, and the frequency will be
monthly for the first year, and then quarterly for the second year. For the
in-situ preserved plant individuals, the monitoring will be conducted monthly
throughout the construction period. The monitoring surveys shall be carried out
by a qualified botanist approved by authorities. The condition of the tree-protection zone, if
any, should be regularly checked.
11.4.5
Monitoring for
Tung Chung Stream EIS and Wong Lung Hang EIS
11.4.5.1 For protection of Tung Chung Stream and verifying
the effectiveness of mitigation measures, monitoring on Tung Chung Stream is
recommended for public works in or near Tung
Chung Stream, including construction of River Park (together with revitalization of channelized section of Tung Chung
Stream), road crossings spanning over Tung
Chung Stream, polders, and stormwater attenuation
and treatment ponds. The
monitoring should include pre-construction
baseline survey, construction phase monitoring and post-construction
monitoring. The monitoring items should
cover the environment of the stream courses, the water quality, and the stream
fauna. During the works period of road crossings and the river park, monitoring
shall be undertaken to identify and evaluate any impacts with appropriate
actions taken as required to address and minimise any adverse impact found.
11.4.5.2
As the proposed
River Park will have construction works inside Tung Chung Stream for
revitalizing the channelized section, pre-construction (baseline) monitoring
shall be carried out on a monthly basis for a 12-month duration. The duration
of baseline monitoring for other public works (road crossings, polders, and
stormwater attenuation and treatment ponds) shall not be less than 6 months and
covering wet season. The construction phase monitoring shall cover the full
construction programme on a monthly basis.
The post-construction monitoring shall cover a 12 month duration after
the completion on a monthly basis. (see Table
11.1).
Table 11.1 Monitoring
of measures to minimize impacts to Tung Chung Stream
Phase |
Methodology |
Pre-construction
(Baseline) (12-month duration for River Park; at least 6-month and covering
wet season for other public works) |
Monthly quantitative replicate surveys of
the environment of the stream courses, the water quality, and the stream
fauna using standardized methodology at fixed points, the number of which
should be determined prior to the first monitoring event. |
Construction (cover the full construction
programme) |
Monthly quantitative replicate surveys of
the environment of the stream courses, the water quality, and the stream
fauna using standardized methodology at the fixed points determined in the
pre-construction phase. |
Post-construction (cover a 12 month
duration after the completion) |
Monthly quantitative replicate surveys of
the environment of the stream courses, the water quality, and the stream
fauna using standardized methodology at the fixed points determined in the
pre-construction phase. |
11.4.5.3
Action and limit
levels, which should take into account the species and season, for construction
phase will be established with reference to baseline survey data. The responses
when triggering theses limits are outlined in Table 11.2 below.
Table 11.2 Action and limit levels and responses
to evidence of declines in aquatic fauna
Action Level |
Response |
Limit Level |
Response |
Construction Phase |
|||
Non-compliance of Action Level to be
established after baseline monitoring, (such as reduction in taxa diversity
or abundance), such that response is triggered. |
Investigate cause and if cause identified
as related to Project instigate remedial action to remove or reduce source of
disturbance |
Non-compliance of Limit Level to be
established after baseline monitoring, (such as reduction in taxa diversity as
well as abundance), such that Limit Level response is triggered. |
Investigate cause and if caused identified
as related to Project instigate further remedial action. |
11.4.5.4 Monitoring of stream fauna includes fish and
aquatic invertebrate, methodology should follow standard methods of direct
observation and active search. The frequency should be monthly.
11.4.5.5 In order to verify the effectiveness of
mitigation measures of Wong Lung Hang during the construction of Service
Reservoirs, monitoring on Wong Lung Hang is recommended. The monitoring
approach should follow the methods adopted for other public works (road crossings, polders, and stormwater attenuation
and treatment ponds) near Tung
Chung Stream.
11.4.6
Eco-shoreline
monitoring
11.4.6.1 The colonisation and establishment of fauna and/or
flora on the eco-shoreline at TCE PDA and Road P1 reclamation
should be monitored. Marine ecosystems are expected to be enhanced by the eco-shoreline,
and hence monitoring of the eco-shoreline shall include
quantitative ecological survey methods and measurements of water quality
parameters, and cover dry and wet seasons. As it
is expected that this measure will also benefit fisheries species in the marine
ecosystems, besides ecological components, the monitoring should also include
monitoring on fisheries resources (in particular the recruitments of fisheries
species). Monitoring shall be conducted for at least 3 years after the completion of reclamation works, twice in wet season and
twice in dry season, in order to determine the
effectiveness of the eco-shoreline. Reference sites shall be selected in
nearby artificial seawalls, to be monitored following the same methods, to
facilitate comparisons and evaluation of effectiveness. The need of extension
of monitoring will be reviewed upon completion of the monitoring and subject to
the findings of the monitoring surveys.
11.4.6.2 The details of the monitoring requirements,
methodology and programme will be proposed in accordance with the design and
targets of the eco-shoreline, with the submission of the Eco-Shoreline Design
Study.
11.4.6.3 Marine
ecosystems includes intertidal communities and
subtidal hard substrate communities, which should be conducted both
qualitatively and quantitatively. Species and abundance of biota should be
recorded. Diversity index and evenness index should be provided for evaluation
and comparison purposes.
11.4.6.4 Parameters for water quality monitoring include dissolved oxygen (DO), dissolved oxygen
saturation (DO%), temperature, turbidity, salinity, pH and suspended solids
(SS),
and the measure methodology could make reference to Water Quality monitoring.
11.4.6.5 Regarding the monitoring of
fisheries recruitment, it is recommended the monitoring survey should be monthly covering May to August (the spawning periods of marine fishes). The principal sampling method may involve the use of small seine net or plankton net. Other sampling methods such as fish cages,
tidal nets and night-time survey could also be
considered and recommended where appropriate. Reference
sites shall be selected in nearby locations, to be monitored following the same
methods, to facilitate comparisons and evaluation of effectiveness.
11.4.7
Tung Chung Bay and
Tai Ho Wan monitoring
11.4.7.1 Though Tung Chung Bay is not being directly
impacted by the Project, given the high ecological importance of Tung Chung
Bay, ecological monitoring should be provided for the bay, including baseline
monitoring before reclamation, construction phase monitoring during the
reclamation process, and post-construction monitoring.
11.4.7.2 The monitoring will be conducted on the intertidal
soft shore habitats, especially where horseshoe crab juveniles and seagrass
beds have been sighted. Baseline for the soft shore ecology shall be
established prior to the commencement of reclamation works and agreed with
AFCD. The monitoring should cover sedimentation rate, horseshoe crab
population, extent of seagrass beds, and soft shore
intertidal communities. The survey methodology should make reference to
previous intertidal soft shore surveys in particular those in North Lantau Species and abundance of biota both sediments and
surface of the quadrats should be reported. Diversity index and evenness index
should be provided for evaluation and comparison purposes.
11.4.7.3 Soft shore monitoring will be conducted quarterly
during the reclamation construction period. If the impact monitoring results
indicate that the density or the distribution pattern of intertidal fauna and
seagrasses has changed, the ET should inform AFCD and investigate the possible
causes of the change. Appropriate actions should be recommended and additional
mitigation measures should be implemented as necessary. The monitoring results
should be made available within a reasonable short period to be agreed with the
EPD, ER and IEC. Soft shore ecological monitoring will be conducted in the
post-construction phase at least for 2 year after completion of construction.
11.4.7.4 The Action and Limit levels
and event-action plan for mudflat monitoring are not determined in this manual
but will be proposed by Ecologist or respective specialists of the
Environmental Team based upon the baseline monitoring data, agreed by AFCD and
EPD.
11.4.7.5 Monitoring on Tai Ho Wan is recommended,
which should follow the methods adopted for Tung Chung Bay.
12.1.1.1 The construction and operation of the Project would cause certain fishing ground loss. Permanent loss of about 149.2 ha of fishing ground of low production rate would constitute the residual impact. Due to the small number of fishing vessels and the limited fisheries production affected, the residual impact is considered acceptable. The present Project would only be a smaller contributor among all concurrent projects on the cumulative fishing ground loss. The loss of 149.2 ha fishing ground from the present Project would be about 8.2 % of the anticipated 1,800 ha cumulative fishing ground loss.
12.1.1.2 The
EIA has considered avoidance and minimization
for the impacts arising from the Project, including the following:
Considerations for Impact Avoidance
· The Assessment Area is located in waters off North Lantau and there is no fishpond or mariculture site within the Project footprint. The locations of the proposed PDA at TCE reclamation is not located in waters of high fisheries production or fish fry collection, and also away from the identified sites of fisheries importance such as the spawning and nursery grounds for fisheries species in North Lantau waters.
Considerations for Impact Minimisation
· Revealed from reviewed literatures, the marine waters within the Project Area are not identified as important fish spawning or nursery grounds, or support high fish production. The reclamation in Tung Chung Bay for the PDA at TCW has been removed, and thus the total fishing ground loss has been much reduced. The nearest mariculture site is Ma Wan FCZ, which is about 10 km from the Project Area.
12.1.1.3 The EIA concluded that the impact of direct loss and indirect disturbance of fishing grounds due to the Project was relatively minor.
12.2.1.1 The construction and operation of the Project would cause certain fishing ground loss. During the construction phase, a 200 ha of marine works area will be established, and the marine works area is not available for fishing operations for an about 6 year duration. During the operation phase, while part of marine works area will be released, there will be inevitable permanent losses of fishing grounds due to the reclamation footprint and the marine waters within the future marina. A total of 149.2 ha fishing ground will be permanently loss. The impact is considered Minor during both construction and operation phases given the loss area is a minor proportion compared with the available fishing ground in Hong Kong waters and the loss area is not of high fisheries production rate. Eco-shoreline will be provided on the future reclamation seawalls as mitigation on marine ecology. But it is expected that fisheries species in North Lantau will also be benefited by the enhanced ecological functions.
12.2.1.2 The present Project would only be a smaller contributor among all concurrent projects on the cumulative fishing ground loss. The loss of 149.2 ha fishing ground from the present Project would be about 8.2 % of the anticipated 1,800 ha cumulative fishing ground loss.
12.2.1.3 Permanent
loss of about 149.2ha of fishing ground of low production rate would
constitute the residual impact. Due to low to moderate
number of fishing vessels and the limited
fisheries production affected, the residual
impact is considered acceptable. The
operational phase hydrodynamic modelling works has also taken into account
concurrent projects, and the results indicated no significant water quality
impact during the operational phase is anticipated. Adverse residual fisheries
impact is not anticipated from the present Project.
12.2.1.4 Recommended mitigation measures for water quality for the construction phase that would minimise and mitigate the potential impacts on fishing grounds and mariculture sites in North Lantau waters have been proposed in the water quality assessment of the present EIA report. Besides the recommended mitigation measures for water quality stated in the water quality assessment, no further mitigation measures were necessary.
12.3.1.1 There will
be a water quality monitoring programme for the construction of the project to
safeguard the marine water quality in the area. There will also be a monitoring
programme for the eco-shoreline which is an ecological mitigation in Chapter 9
of this EIA Report. The colonisation and establishment of fauna and/or
flora on the eco-shoreline at TCE PDA reclamation will be monitored after the eco-shoreline
is completed. As it is expected that this measure will also
benefit fisheries species in the marine ecosystems, the monitoring programme will also include, besides
ecological surveys, water quality monitoring and fisheries resource monitoring
(in particular the recruitments of fisheries species). Other than
these, no other specific fisheries EM&A programme would be required.
12.4.1.1 Audit requirements would follow those for water quality and general site practices.
12.5.1.1 There will be a water quality monitoring programme for the construction of the project to safeguard the marine water quality in the area. There will also be a monitoring programme for the eco-shoreline which is an ecological mitigation in Chapter 9 of this EIA Report. The colonisation and establishment of fauna and/or flora on the eco-shoreline at TCE PDA reclamation will be monitored after the eco-shoreline is completed. As it is expected that this measure will also benefit fisheries species in the marine ecosystems, the monitoring programme will also include, besides ecological surveys, water quality monitoring and fisheries resource monitoring (in particular the recruitments of fisheries species). Other than these, no other specific fisheries monitoring is required.
13.1.1.1 The EIA has recommended EM&A for landscape and visual mitigation measures to be undertaken during the design, construction and operational stages of the project. The design, implementation and maintenance of landscape mitigation measures is a key aspect of this and should be checked to ensure that they are fully realised and that potential conflicts between the proposed landscape measures and any other project works and operational requirements are resolved at the earliest possible date and without compromise to the intention of the mitigation measures. In addition, implementation of the mitigation measures recommended by the EIA will be monitored through the site audit programme.
13.2.1.1 The Landscape and Visual Assessment of the EIA proposes a number of mitigation measures to ameliorate the landscape and visual impacts of the Project. These measures are listed in table below and implementation is summarised in the EMIS in Appendix 4.1.
Table 13.1 Mitigation measures for landscape and visual impacts
Mitigation Measure Code |
Summary Description |
Mitigate Landscape Impacts |
Mitigate Visual Impacts |
Construction
Phase |
|||
MM1 |
Optimization of Construction Areas &
Providing Temporary Landscape on Temporary Construction |
√ |
√ |
MM2 |
Minimize Topographical Changes |
√ |
√ |
MM3 |
Preservation of Potentially Registerable OVTs,
Rare and Protective Vegetation |
√ |
|
MM4 |
Transplanting of Existing Trees |
√ |
|
MM5 |
Screen Hoarding |
|
√ |
MM6 |
Adopting Non-dredge Method for
the Reclamation |
√ |
|
MM7 |
Protection of Natural Rivers
and Streams |
√ |
|
MM8 |
Preservation of Natural
Coastline |
√ |
|
MM9 |
Providing Natural Rock
Material/ Planting for Artificial Seawall |
√ |
√ |
Operational
Phase |
|||
MM10 |
Compensatory Planting |
√ |
|
MM11 |
Woodland Restoration |
√ |
|
MM12 |
Screen Planting |
√ |
√ |
MM13 |
Roadside Planting |
√ |
√ |
MM14 |
Aesthetic Design of Built
Development |
|
√ |
MM15 |
Maximise Greening on Structures |
√ |
√ |
MM16 |
Noise Barrier Design |
|
√ |
MM17 |
Landscape Treatment for Polders
& Stormwater
Attenuation and Treatment Ponds |
√ |
√ |
Construction
Phase & Operation Phase |
|||
MM18 |
Landscaping on Slopes |
√ |
√ |
MM19 |
Landscape Treatment on
Channelized Watercourses |
√ |
√ |
MM20 |
Lighting Control |
|
√ |
13.2.1.2 The landscape and visual mitigation measures proposed should be incorporated in the detailed landscape and engineering design. Mitigation measures to be implemented during construction should be adopted from the start of construction and be in place throughout the entire construction period. Mitigation measures to be implemented during operation should be integrated into the detailed design and built as part of the construction works so that they are in place on commissioning of the Project. Tree transplantation, preservation of Potentially Registerable Old and Valuable Trees (OVTs), Rare and Protective Vegetation, and compensatory planting should be carried out as early as possible in the Project with transplantation carried out prior to construction starting in any particular area.
13.3.1.1 The landscape and visual baseline will be determined with reference to the habitat maps included in the EIA Report and detailed tree survey to be completed before the works can commence as well as preliminary site conditions verification surveys.
13.4 Environmental Monitoring and Audit Requirement
13.4.1.1 The design stage EM&A requirements for landscape and visual resources comprise the audit of the detailed landscaping and visual specifications to be prepared during the detailed design together with ensuring that the design is sensitive to landscape and visual impacts. The landscape and visual auditor shall review the designs as and when they are prepared and liaise with the landscape architect and design engineer to ensure all measures have been incorporated in the design in a format that can be specified to the Contractor for implementation.
13.4.1.2 Site audits should be undertaken during the construction phase of the Project to check that the proposed landscape and visual mitigation measures are properly implemented and maintained as per their intended objectives. Site inspections should be undertaken by the ET at least once every two weeks during the construction period, preferably by a Registered Landscape Architect (RLA) employed by the Contractor. Particularly audits should be carried out during site clearance when proposed tree retain, tree felling, and transplantation may occur. For all soft landscaping work, including measures involving trees such as tree transplantation, compensatory planting and woodland restoration, there should be at least a 24 month establishment period and maintenance which will commence once soft landscaping in an area has been planted. The broad scope of the audit is detailed below.
· The extent of the agreed works areas should be regularly checked during the construction phase. Any trespass by the contractor outside the limit of the works, including any damage to existing trees and woodland shall be noted.
· The progress of the engineering works should be regularly reviewed on site to identify the earliest practical opportunities for the landscape works to be undertaken.
· The tree and shrub transplanting and planting operations.
· Topsoil protection and storage operations.
· All existing trees and vegetation within the study area which are not directly affected by the works are retained and protected.
· The methods of protecting existing vegetation proposed by the Contractor are acceptable and enforced.
· All landscaping works are carried out in accordance with the specifications, with particular attention to approved use of herbicides or pesticides.
· The species and mix of new plant species to be planted are suitable.
· The newly planted trees, shrubs and grassed areas are maintained throughout the establishment period, particularly in respect of the following:
a. regular watering, weeding and fertilising of all planting and grass reinstatement;
b. regular grass cutting for reinstated areas;
c. firming up of plants after periods of strong winds or heavy rain;
d. regular checks for and eradication of pests, fungal infection etc.;
e. pruning of dead or broken branches; and
f. prompt replacement of dead plants and re-grassing of failed areas.
13.4.1.3 The audits during the operational phase will be restricted to the 24 months establishment works of the landscape proposals, with the appropriate agents taking over the maintenance and monitoring after this period as identified in the EIA report.
Table 13.2 Monitoring Programme for Landscape and Visual
Stage |
Monitoring Task |
Monitoring Report |
Form of Approval |
Frequency |
Design |
Monitoring of design
works against the recommendations of the landscape and visual impact
assessments within the EIA should be undertaken by the Engineer and Landscape
Architect, to ensure that they fulfil the intentions of the mitigation
measures. Any changes to the design,
including design changes on site should also be checked. |
Report by Engineer
confirming that the design conforms to requirements of EP. |
Approval
by Project Proponent |
At completion of design
stage |
Construction |
Monitoring of the
contractor’s operations during the construction period. |
Report on
Contractor's compliance by ET |
Counter-signature of
report by IEC |
Monthly |
Establishment Works |
Monitoring of the
planting works during the 24-months Establishment Period after completion of
the construction works. |
Report on Contractor's
compliance by ET |
Counter-signature of
report by IEC |
Bi-monthly |
Note:
ET – Environmental Team
IEC – Independent Environmental Checker
EP – Environmental Permit
13.5.1.1 In the event of non-compliance, the responsibilities of the relevant parties are detailed in the Event/Action plan provided in Table 13.3.
Table 13.3
Event/Action Plan for Landscape and Visual
Event |
Action |
|||
ET |
IEC |
ER |
Contractor |
|
Design Check |
1. Check final design conforms to the requirements
of EP and prepare report. |
1. Check report. 2. Recommend remedial design if necessary. |
1. Undertake remedial design if necessary. |
|
Non-conformity on one
occasion |
1. Inform the IEC, ER and the Contractor 2. Discuss remedial actions with IEC, ER and
Contractor 3. Monitor remedial actions until rectification has
been completed |
1. Check report. 2. Check Contractor’s working method 3. Discuss with ET, ER and Contractor on possible
remedial measures. 4. Advise ER on effective of proposed remedial
measures. 5. Check implementation of remedial measures |
1. Confirm receipt of notification of non-conformity
in writing 2. Review and agree on the remedial measures
proposed by the Contractor 3. Ensure remedial measures are properly implemented |
1. Identify source and investigate the
non-conformity 2. Amend working
methods agreed with ER as appropriate 3. Rectify damage
and undertake any necessary replacement |
Repeated Non-conformity |
1. Identify sources 2. Inform the Contractor, IEC and ER 3. Discuss inspection frequency 4. Discuss remedial actions with IEC, ER and
Contractor 5. Monitor remedial actions until rectification has
been completed 6. If non-conformity stops, cease additional
monitoring |
1. Check inspection report 2. Check Contractor’s working method 3. Discuss with ET,ER and Contractor on possible
remedial measures 4. Advise ER on effectiveness of proposed remedial
measures |
1. Notify the Contractor 2. In consultation with the ET and IEC, agree with
the Contractor on the remedial measures to be implemented 3. Supervise implementation of remedial measures |
1. Identify source and investigate the
non-conformity 2. Amend working
methods agreed with ER as appropriate 3. Rectify damage
and undertake any necessary replacement. Stop relevant portion of works as
determined by ER until the non-conformity is abated. |
Note:
ET – Environmental Team
IEC – Independent Environmental Checker
ER – Engineer’s Representative
14.1.1 Introduction
14.1.1.1 The assessment has considered both the construction and operational phases of the project.
Construction Phase
14.1.2.1 According to the archaeological potential identified in Section 12.5 of EIA report, the recommendations for corresponding development clusters are summarised in Table 14.1 below.
Table 14.1 Summary of recommendations
for development clusters in TCW
Cluster |
Area
surveyed |
Archaeological
Potential |
Recommendations |
Future
Owner |
TCV-1 |
Partly |
High. |
A rescue excavation after land resumption and prior
to construction works is recommended for all areas within Sha Tsui Tau Site
of Archaeological Interest affected by developing works in residential
cluster TCV-1, facilities TCV-i, TCV-j
and TCV-k as well as commercial lots COM-1 and COM-2. This recommendation
also includes the respective access road to TCV-1 (NBA). For the western part of TCV-1 and Sha Tsui Tau Site
of Archaeological Interest a Survey-cum-rescue excavation after land resumption
and prior to construction works is recommended. For
the DO to the north of TCV-1, the archaeological potential is also considered
as high. However, most of this DO
would be maintained as its current use and only minimal works would be
conducted there. Hence, it is
recommended that a Watching Brief with an archaeologist supervising any small
scale excavation for utilities works etc. would be required. |
Private residual developer |
TCV-i |
Exempted* |
High. |
|
Government |
TCV-j |
|
|
|
Government |
TCV-k |
|
|
|
Government |
COM-1 |
|
|
|
Private developer |
COM-2 |
Partly |
High due to
proximity to Sha Tsui Tau Site of Archaeological Interest and previous
results. |
|
Private developer |
COM-3 |
Yes |
High due to
proximity to Sha Tsui Tau Site of Archaeological Interest and previous
results. |
A
Survey-cum-rescue excavation is recommended after land resumption and prior
to construction works for commercial building cluster COM-3. |
Private developer |
TCV-2 |
Yes |
High in
south-western portion due to finds in TP14 and results of previous
investigations. The remaining parts are considered low. |
Further
survey focusing around TP-14 and the low ridge in the
south-western part of TCV-2 is recommended after land resumption and prior to
any construction works. In all other
areas of TCV-2, no further action is required. |
Private residual developer |
TCV-d |
Yes |
Low. |
No further
action is required. |
Government |
TCV-e |
Yes |
Medium due to
finds in TP-13 and proximity to TCV-1. |
Watching
brief during excavation of TCV-e is recommended. |
Government |
TCV-3 |
No |
Low. |
No further
action is required. |
Private residual
developer |
TCV-a |
No |
|
|
Government |
TCV-4 |
Yes |
Low due to
heavy re-modelling of slopes. |
No
further action is required. |
Private residual developer |
TCV-b |
Yes |
|
|
Government |
TCV-5a |
Yes |
Low due to considerable
disturbances. |
No
further action is required. |
Private residual developer |
TCV-c |
Yes |
|
|
Government |
TCV-5b |
Yes |
Medium. |
A watching
brief during the construction phase is recommended for TCV-5b and access road
between TCV-5a and 5b. |
Private residual
developer |
Access road |
Yes |
|
|
Government |
TCV-6 |
Yes |
Low due to
dumping and to slope works east of TCV-6. |
No
further action is required. |
Private residual developer |
TCV-l |
No |
Destroyed. |
|
Government |
TCV-7 |
No |
Low. |
No
further action is required. |
Private residual developer |
TCV-n |
No |
Destroyed. |
No further
action is required. |
Government |
TCV-8 |
Yes |
High due to
finds in TP 04 and site location comparable in terms of natural landscape and
topology to Cheung Shue Tan near Chinese University. The south-western
part was noted to be sterile and hence of low potential. |
Further
survey is
recommended on lower terrace around TP 04 after
land resumption and prior to any construction works. This also affects the
access road leading into TCV-8. No further action
is required for the south-western part of TCV-8. |
Private residual developer |
Access road
into TCV-8 |
Yes |
|
|
Government |
TCV-f |
Yes |
Low. |
Since
facility TCV-f is planned with a small nullah, no further action is required. |
Government |
TCV-g |
Yes |
High due potentially favourable settlement
conditions along former coastal area. |
Further
survey is recommended on the plan in and around TCV-g after land resumption
and prior to any construction works. |
Government |
Access road along south side |
Yes |
Low. |
No further action
is required. |
Government |
TCW-1 |
Yes |
Low due to
considerable disturbances. |
No further
action is required. |
Private residual developer |
TCW-2 |
No |
Medium due to
the possible finds near the youth camp and also unsolved whereabouts of a
second Tung Chung battery site. |
Further
survey in form of one or two test pits could be excavated in lot of youth
camp after land
resumption and prior to construction works. |
Private residual
developer |
Access road
into TCW-2 |
No |
|
|
Government |
TCW-a |
Exempted* |
Low. |
No further action
required. |
Government |
TCW-3 |
No |
Destroyed. |
No further
action required. |
Private residual
developer |
TCW-b |
|
|
|
Government |
TCW-c |
|
|
|
Government |
Note:
*The whole development cluster is proposed within the Site of
Archaeological Interest which has been studied in previous studies and hence
the area is not included in this survey.
As there is only relatively smaller scale of works anticipated to be
carried out at the other development areas including CA, CPA, GB, V, AGR,
RO/DO, IC and OU, terrestrial archaeological impact is not anticipated and thus
recommendation is not required.
14.1.2.2 The above mentioned recommendations are graphically summarised in Figure 14.1. Red shaded areas are areas where further archaeological investigations after land resumption and prior to any construction works are needed. Yellow shaded areas are areas where further action in form of watching briefs during construction works are recommended. Green shaded areas are areas where no further action is required. Blue shaded areas are other development areas (CA, CPA, GB, V, AGR, RO/DO, IC and OU zonings with minor works) where no further action is required.
14.1.2.3 The recommendations on archaeological investigation can be classified in three categories:
1) Rescue excavations where previous findings could be confirmed with this survey and where data is sufficient to exactly locate and define the extent of necessary works. Affected areas are Sha Tsui Tau Site of Archaeological Interest including eastern parts of cluster TCV-1, facilities TCV-i to TCV-k as well as commercial clusters COM-1 and 2;
2) Survey-cum-rescue excavations are subdivided procedures. An initial advanced survey as integral part of the works helps to complete data and to better locate and design the follow-up rescue excavations. Survey-cum-rescue excavations are recommended for western parts of cluster TCV-1 and for commercial cluster COM-3; and
3) Further surveys, where additional (enlarged) test pits are recommended without the imminent need of a follow-up rescue excavations are recommended for parts of clusters TCV-2 and TCV-8 as well as clusters TCW-2 and TCV-g. Further surveys will be conducted prior to the commencement of any construction works; and mitigation measures will be formulated based on the findings of further surveys in prior consultation with AMO before the construction phase of the Project.
14.1.2.4 The project proponent should be aware of the protection of items of archaeological or historic significance according to the Antiquities and Monuments Ordinance. Should finds be discovered: 1) during the additional archaeological investigation after land resumption and prior to construction works; 2) during the watching brief during the construction phase of the project; or 3) where construction works can commence without further action being necessary, the AMO has to be contacted immediately for further agreement on practical and feasible handling procedures.
Operational Phase
14.1.2.5 As mentioned in Section 12.6 of EIA report, no adverse impact is anticipated for terrestrial archaeology and thus no further action or mitigation is required.
14.2.1 Introduction
14.2.1.1 The assessment has considered both the construction and operational phases of the project.
14.2.2 Mitigation Measures
Construction Phase
14.2.2.1 As marine archaeological resource was not identified during the diver survey, no further action or mitigation is thus required.
Operational Phase
14.2.2.2 As mentioned in Section 12.6 of EIA report, no adverse impact is anticipated for marine archaeology and thus no further action or mitigation is required.
14.3.1 Introduction
14.3.1.1 The assessment has considered both the construction and operational phases of the project.
14.3.2 Mitigation Measures
Construction Phase
14.3.2.1 As mentioned in Section 12.4 of EIA report, all the identified built heritage items within the vicinity of TCW are located in land use zonings of the RODP in which large scale development is not proposed, impacts on these items is not anticipated and thus no further action or mitigation is required.
Operational Phase
14.3.2.2 As mentioned in Section 12.6 of EIA report, no development will be proposed on all existing built heritage items and they will be retained as they are, no adverse impact is anticipated and thus no further action or mitigation is required.
15.1.1.1 Site inspection provides a direct means to initiate and enforce specified environmental protection and pollution control measures. These shall be undertaken routinely to inspect construction activities in order to ensure that appropriate environmental protection and pollution control mitigation measures are properly implemented. Site inspection is one of the most effective tools to enforce the environmental protection requirements at the works area.
15.1.1.2 The ET shall be responsible for formulating the environmental site inspection programme as well as the deficiency and action reporting system, and for carrying out the site inspections. The proposal for rectification, if any, should be prepared and submitted to the ET Leader and IEC by the Contractor.
15.1.1.3 Regular site inspections shall be carried out and led by the ER and attended by the Contractor and ET at least once per week during the construction phase. The areas of inspection shall not be limited to the environmental situation, pollution control and mitigation measures within the site. It should also review the environmental situations outside the works area which is likely to be affected, directly or indirectly, by the construction site activities of the Project. The ET shall make reference to the following information in conducting the inspection. During the inspection, the following information should be referred to:
(i) EIA Report recommendations on environmental protection and pollution control mitigation measures;
(ii) works progress and programme;
(iii) individual works methodology proposals (which shall include the proposal on associated pollution control measures);
(iv) contract specifications on environmental protection;
(v) relevant environmental protection and pollution control legislations; and
(vi) previous site inspection results.
15.1.1.4 The Contractor shall keep the ER and ET Leader updated with all relevant environmental related information on the construction contract necessary for him to carry out the site inspections. Site inspection results and associated recommendations for improvements to the environmental protection and pollution control efforts should be recorded and followed up by the Contractor in an agreed time-frame. The Contractor shall follow the procedures and time-frame as stipulated in the environmental site inspection, and the deficiency and action reporting system formulated by the ET, to report on any remedial measures subsequent to the site inspections.
15.1.1.5 The ER, ET and the Contractor should also carry out ad-hoc site inspections if significant environmental problems are identified. Inspections may also be required subsequent to receipt of a valid environmental complaint, or as part of the investigation work, as specified in the Action Plan for the EM&A programme.
15.2.1.1 There are statutory requirements on environmental protection and pollution control requirements with which construction activities must comply.
15.2.1.2 In order to ensure the works comply with corresponding requirements, all method statements of works should be submitted by the Contractor to the ER for approval and to the ET Leader to ensure sufficient environmental protection and pollution control measures have been included. The Environmental Mitigation Implementation schedule (EMIS) is summarised in Appendix 4.1. Any proposed changes to the mitigation measures shall be certified by the ET Leader and verified by the IEC as conforming to the relevant information and recommendations contained in the EIA Report.
15.2.1.3 The ER and ET shall also review the progress and programme of the works to check that relevant environmental legislations have not been violated, and that any foreseeable potential for violating laws can be prevented.
15.2.1.4 The Contractor should provide the update of the relevant documents to the ET Leader so that checking can be carried out. The document shall at least include the updated Works Progress Reports, updated Works Programme, method statements, any application letters for different licences / permits under the environmental protection laws, and copies of all valid licences / permits. The site diary and environmental records shall also be available for inspection by the relevant parties.
15.2.1.5 After reviewing the document, the ET shall advise the IEC and Contractor of any non-compliance with legislative requirements on environmental protection and pollution control so that they can timely take follow-up actions as appropriate. If the follow-up actions may still result in potential violation of environmental protection and pollution control requirements, the ER and ET should provide further advice to the Contractor to take remedial action to resolve the problem.
15.2.1.6 Upon receipt of the advice, the Contractor shall undertake immediate actions to correct the situation. The ER and ET shall follow up to ensure that appropriate action has been taken in order to satisfy legal requirements.
15.3 Choice of Construction Method
15.3.1.1 At times during the construction phase the Contractor may submit method statements for various aspects of construction. This state of affairs would only apply to those construction methods that the EIA has not imposed conditions while for construction methods that have been assessed in the EIA, the Contractor is bound to follow the requirements and recommendations in the EIA study. The Contractor’s options for alternative construction methods may introduce adverse environmental impacts into the Project. It is the responsibility of the Contractor and ET, in accordance with established standards, guidelines and EIA study recommendations and requirements, to review and determine the adequacy of the environmental protection and pollution control measures in the Contractor’s proposal in order to ensure no unacceptable impacts would result. To achieve this end, the ET shall provide a copy of the Proactive Environmental Protection Proforma as shown in Appendix 15.1 to the IEC for approval. The IEC should audit the review of the construction method and endorse the proposal on the basis of no adverse environmental impacts.
15.4.1.1 The following procedures should be undertaken upon receipt of any environmental complaint:
· The Contractor to log complaint and date of receipt onto the complaint database and inform the ER, ET and IEC immediately;
· The Contractor to investigate, with the ER and ET, the complaint to determine its validity, and assess whether the source of the problem is due to construction works of the Project with the support of additional monitoring frequency and stations, if necessary;
· The Contractor to identify remedial measures in consultation with the IEC, ET and ER if a complaint is valid and due to the construction works of the Project;
· The Contractor to implement the remedial measures as required by the ER and to agree with the ET and IEC any additional monitoring frequency and stations, where necessary, for checking the effectiveness of the remedial measures;
· The ER, ET and IEC to review the effectiveness of the Contractor's remedial measures and the updated situation;
· The ET to undertake additional monitoring and audit to verify the situation if necessary, and oversee that circumstances leading to the complaint do not recur;
· If the complaint is referred by the EPD, the Contractor to prepare interim report on the status of the complaint investigation and follow-up actions stipulated above, including the details of the remedial measures and additional monitoring identified or already taken, for submission to EPD within the time frame assigned by the EPD; and
· The ET to record the details of the complaint, results of the investigation, subsequent actions taken to address the complaint and updated situation including the effectiveness of the remedial measures, supported by regular and additional monitoring results in the monthly EM&A reports.
16.1.1.1 Reports can be provided in an electronic medium upon agreeing the format with the ER and EPD. This would enable a transition from a paper / historic and reactive approach to an electronic / real time proactive approach. All the monitoring data (baseline and impact) shall also be submitted on diskettes or other approved media. The formats for air quality, noise and water quality monitoring data to be submitted shall be separately agreed.
16.1.1.2 The ET is responsible for establishing and maintaining a dedicated website throughout the entire construction period for publishing all the relevant environmental monitoring data (including but not limited to the baseline and impact monitoring). The ET shall propose the format and functionality of the website for agreement with the ER and IEC prior to publishing of data. Once the monitoring data are available (e.g. noise, dust, water quality etc) and vetted by the IEC, the ET is responsible to upload the relevant data to the dedicated website.
16.1.1.3 Types of reports that the ET shall prepare and submit include baseline monitoring report, monthly EM&A report and final EM&A review report. In accordance with Annex 21 of the TM-EIAO, a copy of the monthly and final review EM&A reports shall be made available to the Director of Environmental Protection.
16.2 Baseline Monitoring Report
16.2.1.1 The baseline monitoring report shall include at least the following:
(i) up to half a page executive summary;
(ii) brief project background information;
(iii) drawings showing locations of the baseline monitoring stations;
(iv)
monitoring
results (in both hard and diskette copies) together with the following
information:
·
monitoring
methodology;
·
name
of laboratory and types of equipment used and calibration details;
·
parameters
monitored;
·
monitoring
locations;
·
monitoring
date, time, frequency and duration; and
·
quality
assurance (QA) / quality control (QC) results and detection limits;
(v)
details
of influencing factors, including:
·
major
activities, if any, being carried out on the site during the period;
·
weather
conditions during the period; and
·
other
factors which might affect monitoring results;
(vi)
determination
of the Action and Limit Levels for each monitoring parameter and statistical
analysis of the baseline data;
(vii)
revisions
for inclusion in the EM&A Manual; and
(viii)
comments,
recommendations and conclusions.
16.3 Monthly Monitoring Reports
16.3.1.1 The results and findings of all EM&A work required in the Manual shall be recorded in the monthly EM&A reports prepared by the ET and endorsed by the IEC. The EM&A report shall be prepared and submitted to EPD within 10 working days of the end of each reporting month, with the first report due the month after construction commences. Copies of each monthly EM&A report shall be submitted to the following parties: the IEC, the ER and EPD. Before submission of the first EM&A report, the ET shall liaise with the parties on the required number of copies and format of the monthly reports in both hard copy and electronic medium.
16.3.1.2 The ET should prepare and submit a Baseline Environmental Monitoring Report at least one month before commencement of construction of the Project. Copies of the Baseline Environmental Monitoring Report should be submitted to the IEC, ER and EPD. The ET should liaise with the relevant parties on the exact number of copies require.
16.3.1.3 The ET shall review the number and location of monitoring stations and parameters every six months, or on as needed basis, in order to cater for any changes in the surrounding environment and the nature of works in progress.
First Monthly EM&A Report
16.3.1.4 The first monthly EM&A report shall include at least the following:
(i) Executive summary (1-2 pages):
· breaches of Action and Limit levels;
· compliant log
· notifications of any summons and successful prosecutions;
· reporting changes; and
· future key issues.
(ii) Basic project information:
· project organization including key personnel contact names and telephone numbers;
· programme;
· management structure; and
· works undertaken during the month.
(iii) Environmental status:
· advice on the status of statutory environmental compliance such as the status of compliance with the environmental permit (EP) conditions under the EIAO, submission status under the EP and implementation status of mitigation measures;
· works undertaken during the month with illustrations (such as location of works, daily excavation rate, etc.); and
· drawings showing the project are, any environmental sensitive receivers and the locations of the monitoring and control stations (with co-ordinates of the monitoring locations).
(iv) A brief summary of EM&A requirements including:
· all monitoring parameters;
· environmental quality performance limits (Action and Limit levels);
· Event-Action Plans;
· environmental mitigation measures, as recommended in the project EIA study final report; and
· environmental requirements in contract documents.
(v) Implementation status
· advice on the implementation status of environmental protection and pollution control / mitigation measures, as recommended in the project EIA Report.
(vi) Monitoring results (in both hard and diskette copies) together with the following information:
· monitoring methodology;
· name of laboratory and types of equipment used and calibration details;
· monitoring parameters;
· monitoring locations;
· monitoring date, time, frequency, and duration;
· weather conditions during the period;
· any other factors which might affect the monitoring results; and
· QA / QC results and detection limits.
(vii) Report on non-compliance, complaints, and notifications of summons and successful prosecutions:
· record of all non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);
· record of all complaints received (written or verbal) for each media, including locations and nature of complaints investigation, liaison and consultation undertaken, actions and follow-up procedures taken, results and summary;
· record of all notification of summons and successful prosecutions for breaches of current environmental protection / pollution control legislation, including locations and nature of the breaches, investigation, follow-up actions taken, results and summary;
· review of the reasons for and the implications of non-compliances, complaints, summons and prosecutions including review of pollution sources and working procedures; and
· description of the actions taken in the event of non-compliance and deficiency reporting and any follow-up procedures related to earlier non-compliance.
(viii) Others
· an account of the future key issues as reviewed from the works programme and work method statements;
· advice on the solid and liquid waste management status;
· record of any project changes from the originally proposed as described in the EIA (e.g. construction methods, mitigation proposals, design changes, etc.); and
· comments (for examples, effectiveness and efficiency of the mitigation measures), recommendations (for examples, any improvement in the EM&A programme) and conclusions.
Subsequent monthly EM&A Reports
16.3.1.5 Subsequent monthly EM&A reports shall include at least the following:
(i) Executive summary (1-2 pages):
· breaches of Action and Limit levels;
· compliant log
· notifications of any summons and successful prosecutions;
· reporting changes; and
· future key issues.
(ii) Basic project information:
· project organization including key personnel contact names and telephone numbers;
· programme;
· management structure; and
· works undertaken during the month; and
· any updates as needed to the scope of works and construction methodologies.
(iii) Environmental status:
· advice on the status of statutory environmental compliance such as the status of compliance with the environmental permit (EP) conditions under the EIAO, submission status under the EP and implementation status of mitigation measures;
· works undertaken during the month with illustrations (such as location of works, daily excavation rate, etc.); and
· drawings showing the project are, any environmental sensitive receivers and the locations of the monitoring and control stations.
(iv) Implementation status
· advice on the implementation status of environmental protection and pollution control / mitigation measures, as recommended in the project EIA Report.
(v) Monitoring results (in both hard and diskette copies) together with the following information:
· monitoring methodology;
· name of laboratory and types of equipment used and calibration details;
· monitoring parameters;
· monitoring locations;
· monitoring date, time, frequency, and duration;
· weather conditions during the period;
· any other factors which might affect the monitoring results; and
· QA / QC results and detection limits.
(vi) Report on non-compliance, complaints, and notifications of summons and successful prosecutions:
· record of all non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);
· record of all complaints received (written or verbal) for each media, including locations and nature of complaints investigation, liaison and consultation undertaken, actions and follow-up procedures taken, results and summary;
· record of all notification of summons and successful prosecutions for breaches of current environmental protection / pollution control legislation, including locations and nature of the breaches, investigation, follow-up actions taken, results and summary;
· review of the reasons for and the implications of non-compliances, complaints, summons and prosecutions including review of pollution sources and working procedures; and
· description of the actions taken in the event of non-compliance and deficiency reporting and any follow-up procedures related to earlier non-compliance.
(vii) Others
· an account of the future key issues as reviewed from the works programme and work method statements;
· advice on the solid and liquid waste management status;
· record of any project changes from the originally proposed as described in the EIA (e.g. construction methods, mitigation proposals, design changes, etc.); and
· comments (for examples, effectiveness and efficiency of the mitigation measures), recommendations (for examples, any improvement in the EM&A programme) and conclusions.
(viii) Appendices
· Action and Limit levels;
· graphical plots of trends of the monitoring parameters at key stations over the past four reporting periods for representative monitoring stations annotated against the following:
a) major activities being carried out on site during the period;
b) weather conditions during the period; and
c) any other factors that might affect the monitoring results.
· monitoring schedule for the present and next reporting period;
· cumulative statistics on complaints, notifications of summons and successful prosecutions; and
· outstanding issues and deficiencies.
16.4 Final EM&A Review Reports
16.4.1 General
16.4.1.1 The EM&A programme for construction stage should be terminated upon the completion of the construction activities, while the EM&A programme for operation stage should be terminated upon the completion of operation monitoring.
16.4.1.2 The proposed termination should only be implemented after the proposal has been endorsed by the IEC, the Engineer and the Project Proponent followed by approval from the Director of Environmental Protection.
16.4.2 Final EM&A Review Report for Construction Stage
16.4.2.1 The final EM&A review report for construction stage (to be submitted after completion of construction activities) should contain at least the following information:
(i) Executive summary (1-2 pages):
(ii) Drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;
(iii) Basic project information including a synopsis of the project organization, contacts of key management, and a synopsis of work undertaken during the course of the project or past twelve months;
(iv) A brief summary of EM&A requirements including:
· environmental mitigation measures for construction stage, as recommended in the project EIA Report;
· environmental impact hypotheses tested;
· environmental quality performance limits (Action and Limit levels);
· all monitoring parameters;
· Event and Action Plans;
(v) A summary of the implementation status of environmental protection and pollution control / mitigation measures for construction stage, as recommended in the project EIA Report and summarized in the updated implementation schedule;
(vi) Graphical plots and the statistical analysis of the trends of monitoring parameters over the course of the project, including:
· the major activities being carried out on site during the period;
· weather conditions during the period; and
· any other factors which might affect the monitoring results;
(vii) A summary of non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);
(viii) A review of the reasons for and the implications of non-compliance including review of pollution sources and working procedures as appropriate;
(ix) A description of the actions taken in the event of non-compliance;
(x) A summary record of all complaints received (written or verbal) for each media, liaison and consultation undertaken, actions and follow-up actions taken and results;
(xi) A review of the validity of EIA predictions for construction stage and identification of shortcomings in EIA recommendations;
(xii) Comments (for example, a review of the effectiveness and efficiency of the mitigation measures and of the performance of the environmental management system, that is, of the overall EM&A programme for construction stage); and
(xiii) Recommendations and conclusions (for example, a review of success of the overall EM&A programme for construction stage to cost-effectively identify deterioration and to initiate prompt effective mitigatory action when necessary).
16.4.3 Final EM&A Review Report for Operation Stage
16.4.3.1 The final EM&A review report for operation stage (to be submitted after completion of operation monitoring) should contain at least the following information:
(i) Executive summary (1-2 pages):
(ii) Drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;
(iii) Basic project information including a synopsis of the project organization, contacts of key management, and a synopsis of work undertaken during the course of the project or past twelve months;
(iv) A brief summary of EM&A requirements including:
· environmental mitigation measures for operation stage, as recommended in the project EIA Report;
· environmental impact hypotheses tested;
· environmental quality performance limits (Action and Limit levels);
· all monitoring parameters;
· Event and Action Plans;
(v) A summary of the implementation status of environmental protection and pollution control / mitigation measures for operation stage, as recommended in the project EIA Report and summarized in the updated implementation schedule;
(vi) Graphical plots and the statistical analysis of the trends of monitoring parameters over the course of the project, including:
· the major activities being carried out on site during the period;
· weather conditions during the period; and
· any other factors which might affect the monitoring results;
(vii) A summary of non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);
(viii) A review of the reasons for and the implications of non-compliance including review of pollution sources and working procedures as appropriate;
(ix) A description of the actions taken in the event of non-compliance;
(x) A summary record of all complaints received (written or verbal) for each media, liaison and consultation undertaken, actions and follow-up actions taken and results;
(xi) A review of the validity of EIA predictions for operation stage and identification of shortcomings in EIA recommendations;
(xii) Comments (for example, a review of the effectiveness and efficiency of the mitigation measures and of the performance of the environmental management system, that is, of the overall EM&A programme for operation stage); and
(xiii) Recommendations and conclusions (for example, a review of success of the overall EM&A programme for operational stage to cost-effectively identify deterioration and to initiate prompt effective mitigatory action when necessary).
16.5.1.1 No site-based documents (such as monitoring field records, laboratory analysis records, site inspection forms, etc.) are required to be included in the monthly EM&A reports. However, any such document shall be well kept by the ET and be ready for inspection upon request. All relevant information shall be clearly and systematically recorded in the document. Monitoring data shall also be recorded in magnetic media form, and the software copy must be available upon request. Data format shall be agreed with EPD. All documents and data shall be kept for at least one year following completion of the construction contract and one year following completion of the operational phase monitoring for construction phase EM&A and operational EM&A respectively.
16.6 Interim Notifications of Environmental Quality Limit Exceedances
16.6.1.1 With
reference to the Event and Action Plans, when the environmental quality
performance limits are exceeded and if they are proven to be valid, the ET
should immediately notify the IEC and EPD, as appropriate. The notification should
be followed up with advice to the IEC and EPD on the results of the
investigation, proposed actions and success of the actions taken, with any
necessary follow-up proposals. A sample
template for the interim notification is presented in Appendix
16.1.