CONTENTS
Page
1.2 Location
and Description of the Project 1-1
1.3 Requirements
under the Environmental Impact Assessment
1.4 Purpose and
Objective of the Environmental Impact Assessment (EIA)
1.5 Approach of
the EIA Study 1-3
1.6 Structure
of the EIA Report 1-4
2.2 Location
and Description of the Project 2-1
2.4 Consideration
of Alternative Drainage Options, Channel
2.5 Ancillary
Infrastructure 2-27
2.6 Construction
Related Aspects 2-29
2.7 Implementation
Programme 2-30
2.8 Consideration
of Alternative Construction Methods and Sequencing
2.9 Project
Interfaces / Concurrent Projects 2-33
2.10 Scope of Works during
Operational Phase 2-33
2.11 Management and Maintenance
Responsibilities 2-34
2.12 Continuous Public
Involvement 2-36
2.13 Summary of the Final
Channel Design Recommendations 3-38
3.
AIR QUALITY IMPACT ASSESSMENT 3-1
3.2 Air Quality
Assessment Criteria 3-1
3.4 Air
Sensitive Receivers 3-3
3.6 Construction
Phase Impact Assessment 3-5
3.7 Operational
Phase Impact Assessment 3-7
3.10 Monitoring and Audit
Requirements 3-10
4.
NOISE IMPACT ASSESSMENT 4-1
4.4 Representative
Noise Sensitive Receivers 4-5
4.5 Construction
Noise Impact Assessment 4-6
4.6 Operational
Noise Impact Assessment 4-9
4.10 Monitoring and Audit
Requirements 4-24
5.
WATER QUALITY IMPACT ASSESSMENT 5-1
5.2 Environmental
Legislation, Policies, Standards and Criteria 5-1
5.4 Baseline
Water Quality Conditions of the Study Area 5-2
5.5 Water
Sensitive Receivers 5-8
5.6 Potential
Impacts during Construction Phase 5-9
5.7 Mitigation
Measures for Construction Phase 5-11
5.8 Potential
Impacts during Operational Phase 5-16
5.9 Mitigation
Measures for Operational Phase 5-19
5.10 Residual and Cumulative
Impacts 5-21
5.11 Monitoring and Audit
Requirement 5-21
6.2 Relevant
Legislation, Policies, Standards and Criteria 6-1
6.3 Assessment
Methodology 6-4
6.4 Sources and
Types of Waste arising from the Project 6-5
6.7 Evaluation
of Residual Impacts 6-24
7.
ECOLOGICAL IMPACT ASSESSMENT 7-1
7.2 Relevant
Legislation and Guidelines 7-1
7.4 Field
Survey Scope and Methodology 7-2
7.5 Recognised
Site of Conservation Importance 7-3
7.7 Evaluation
of Habitats and Species 7-13
7.8 Impact Identification
and Evaluation 7-20
7.9 Impact
Avoidance and Mitigation Measures 7-25
7.10 Residual Ecological
Impacts 7-27
7.11 Ecological Monitoring
and Audit 7-28
8.
FISHERIES IMPACT ASSESSMENT 8-1
8.4 Methodologies
for Baseline Establishment and Assessment 8-2
8.6 Impact
Identification and Evaluation 8-5
8.9 Environmental
Monitoring and Audit 8-8
9.
LANDSCAPE AND VISUAL IMPACT ASSESSMENT 9-1
9.3 Assessment Methodology 9-2
9.4 Existing
Site Condition 9-9
9.5 Description
of the Proposed Development 9-10
9.7 Review of
Planning and Development Control Framework 9-18
9.8 Landscape
and Visual Impact Assessment 9-18
9.9 Recommended
Landscape Mitigation Measures 9-29
9.10 Residual Impacts and
Acceptability of the Proposed Improvement
9.11 Environmental
Monitoring and Audit Requirements 9-38
10.
ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS 10-1
10.3 Environmental
Management 10-2
10.4 Project Organisation 10-2
10.5 Construction Programme 10-3
10.12 Landscape and Visual 10-8
11.
SUMMARY OF ENVIRONMENTAL OUTCOMES 11-1
11.1 Justification and
Benefits of the Project 11-1
11.2 Population and
Environmental Sensitive Areas Protected 11-1
11.3 Environmental Friendly
Design Recommended 11-2
11.4 Key Environmental
Problems Avoided 11-4
11.5 Compensation Areas
Included 11-5
11.6 Environmental Benefits
of Environmental Protection Measures
12.
CONCLUSION 12-1
12.2 Location and
Description of the Project 12-1
12.4 Justification and
Benefits of the Project 12-2
12.5 Key Environmental
Issues 12-3
12.8 Water Quality Impact 12-4
12.12 Landscape and Visual Impact 12-7
12.13 Environmental Monitoring and Audit
(EM&A) 12-7
END OF TEXT
PLATES
Plate 2 Polluted
water from upstream San Hing Tsuen Channel
Plate 3 Polluted
water from upstream Fung Kong Tsuen Channel
Plate 5 Mangroves
found along Hang Hau Tsuen stream
Plate 6 Container
yard near the Project area
Plate 7 Abandoned
fishpond within the Coastal Protection Area zone
Plate 8 Inter-tidal
mudflats and clusters of mangrove stands along the Deep Bay coastline
Plate 9 Localised
flooding within Hang Hau Tsuen during high tide
Plate 10 Collapsed
footbridge (16 June 2008)
Plate 11 Collapsed footbridge (16 June 2008)
APPENDICES
Appendix
2.1 Flood Risk Map for Hang
Hau Tsuen
Appendix
4.1 Details of Construction Noise
Impact Assessment
Appendix
4.2 Details of Traffic Noise
Impact Assessment
Appendix
5 Water Quality
Testing Results
Appendix
6.1 Sediment Quality Testing
Results
Appendix
6.2 Construction and
Demolition Materials Management Plan (C&DMMP)
Appendix
7 Details of
Ecological Impact Assessment
Appendix
7.1 Plant species recorded in
the Study Area
Appendix 7.2 Avifauna species and their
cumulative abundance recorded in the Study Area
Appendix 7.3 Butterfly species and their
cumulative abundance recorded in the Assessment Area
Appendix 7.4 Dragonfly species and their
cumulative abundance recorded in the Assessment Area
Appendix 7.5 Herpetofauna and mammal within the
Study Area
Appendix 7.6 Results of transect survey on the
mudflats
Appendix
11 Project Implementation
Schedule
LIST OF TABLES
Table
2.1 Alternative
Draiange Options Considered for the Proposed Hang Hau Tsuen Channel
Table
2.3 Summary
of the Evaluation of Alternative Channel Bed / Embankment Lining Options
Table
2.6 Proposed
Management and Maintenance Responsibilities
Table
2.7 Summary
of Continuous Public Involvement
Table
2.8 Summary
of Public Consultation
Table
3.1 Hong
Kong Air Quality Objectives (AQOs)
Table
3.2 Representative
Air Sensitive Receiver (ASR)
Table
3.3 Average
Background Air Pollutants Concentrations at EPD’s Yuen Long Station
Table
3.4 Representative
ASRs chosen for Air Quality Monitoring during Construction Phase
Table 4.1 EIAO-TM
Daytime Construction Noise Standards
Table 4.2 Road
Traffic Noise Criteria
Table 4.3 Representative
Noise Sensitive Receivers (NSRs)
Table 4.4 Predicted
Noise Level during Construction of Hang Hau Tsuen Channel – Unmitigated
Table 4.5 Floor
Levels of the NSRs
Table 4.6 Traffic
Forecast in 2027 with the Project
Table 4.7 Traffic
Flow Data in 2027 without the Project
Table 4.10 Maximum
Predicted Hourly Traffic Noise Level L10 at the Representative NSRs
in 2027
Table 4.11 Quiet
Powered Mechanical Equipment Recommended for Use during Construction Phase
Table 4.14 Summary
of Proposed Construction Noise Mitigation Measures
Table 4.15 Representative
NSRs chosen for Noise Monitoring during Construction Phase
Table 5.1 Field
Observations of the Inland Water Bodies in the Study Area
Table 5.2 Results
of Water Quality Sampling at Hang Hau Tsuen Stream
Table
5.3 Summary
of EPD Marine Water Quality Data for Deep Bay (DM3) from 2005 to 2007
Table 5.4 Water
Quality Monitoring Stations during Construction Stage
Table
6.1 Sediment
Quality Criteria for the Classification of Sediment
Table
6.2a Results
of the Sediment Testing (January 2008)
Table
6.2b Results
of the Sediment Testing (November 2008)
Table
6.3 Types
of C&D Materials and Wastes Generated by the Proposed Project
Table 6.6 Preliminary
Disposal Programme of the C&D Materials
Table 7.1 Habitats
recorded within the Assessment Area
Table 7.2 Evaluation
of Woodland Habitat within the Assessment Area
Table 7.3 Evaluation
of Plantation Habitat within the Assessment Area
Table 7.4 Evaluation
of Grassland/Shrubland Habitat within the Assessment Area
Table 7.5 Evaluation
of Agricultural Land within the Assessment Area
Table 7.6 Evaluation
of Ponds within the Assessment Area
Table 7.7 Evaluation
of Mangrove within the Assessment Area
Table 7.8 Evaluation
of Stream/Channel within the Assessment Area
Table 7.9 Evaluation
of Built-up/Wasteland Habitats within the Assessment Area
Table 7.10 Evaluation
of Mudflats within the Assessment Area
Table 7.11 Evaluation
of Floral Species of Conservation Importance within the Assessment Area
Table 7.12 Evaluation
of Faunal Species of Conservation Importance within the Assessment Area
Table 7.13 Estimated
Habitat Loss
Table 7.14 Summary
of Ecological Impacts and Mitigation Measures
Table 8.1 Construction
and Operation Stage Impacts
Table 9.1 Landscape Elements (LEs)
Table 9.2 Landscape
Character Units (LCUs)
Table 9.3 Sensitive
Visual Receivers (SVRs)
Table 9.4 Summary
of Disturbance to Landscape Character Units
Table 9.5 Summary
of Disturbance to Landscape Elements
Table 9.6 Summary
of Landscape Impact on Landscape Character Units (without Mitigation Measures)
Table 9.7 Summary
of Landscape Impact on Landscape Elements (without Mitigation Measures)
Table
9.8 Summary
of Visual Impacts (without Mitigation Measures)
Table 9.9 Summary
of Landscape and Visual Mitigation Measures Programming Management
Table 9.10 Summary
of Residual Landscape Impacts (with Landscape Mitigation Measures)
Table 9.11 Summary
of Residual Visual Impacts (with Landscape Mitigation Measures)
Table 10.1 Representative ASRs chosen
for Air Quality Monitoring during Construction Stage
Table 10.2 Representative NSRs for
Noise Monitoring during Construction Stage
Table
10.3 Water
Quality Monitoring Stations during Construction Stage
LIST OF FIGURES
Figure 2.1 General
Layout of Hang Hau Tsuen Channel
Figure 2.2 Sections
of Hang Hau Tsuen Channel (Sheet 1 of 2)
Figure 2.3 Sections
of Hang Hau Tsuen Channel (Sheet 2 of 2)
Figure 2.4 Catchment
of Hang Hau Tsuen Channel
Figure 2.5 Extent
of Flooding caused by Typhoon Brenda in May 1989
Figure 2.6 Original
Preliminary Channel Design
Figure 2.7 Location
of the Mangrove Zone and Channel Zone within Hang Hau Tsuen Channel
Figure 3.1 Locations
of Representative Air Sensitive Receivers
Figure 4.1 Locations
of Representative Noise Sensitive Receivers
Figure 4.2 Locations
of Proposed Temporary Noise Barrier
Figure 5.1 Location
of Water Quality and Sediment Quality Monitoring Stations
Figure 5.2 Locations
of Water Sensitive Receivers
Figure 5.3 Schematic
Diagram of Typical Temporary Drainage Measures during Construction Stage
Figure 6.1 Location
of Sediment Quality Sampling Stations
Figure 7.3 Project
Layout Overlaid on Habitat Map (Close-up)
Figure 8.1 Location
of the Project Site and Fisheries Resources
Figure 8.2 Oyster
Beds and Fish Ponds within Fisheries Assessment Area
Figure 9.3 Landscape
Elements (LEs)
Figure 9.4 Landscape
Character Units (LCUs)
Figure 9.5 Site
Location of Sensitive Visual Receivers (SVRs)
Figure 9.6 Sensitive
Visual Receiver – VPT1.1A
Figure 9.7 Sensitive
Visual Receiver – VPT1.1B
Figure 9.8 Sensitive
Visual Receiver – VPT1.1C
Figure 9.9 Sensitive
Visual Receiver – VPT1.1D
Figure 9.10 Sensitive
Visual Receiver – VPT1.2
Figure 9.11 Sensitive
Visual Receiver – VPT2.1
Figure 9.12 Sensitive
Visual Receiver – VPT3.1
Figure 9.13 Sensitive
Visual Receiver – VPT4.1
Figure 9.14 Landscape
Master Plan
Figure 9.15 Landscape
Master Plan (Sections)
Figure 9.17 Photomontage
– View north west from Wing Jan Kindergarten (Day 1 Unmitigated View)
Figure 9.18 Photomontage
– View north west from Wing Jan Kindergarten (Day 1 Mitigated View)
Figure 9.19 Photomontage
– View north west from Wing Jan Kindergarten (Mitigated View Year 10)
Figure 9.20 Photomontage
– View north from Hang Hau Tsuen (Day 1 Unmitigated View)
Figure 9.21 Photomontage
– View north from Hang Hau Tsuen (Day 1 Mitigated View)
Figure 9.22 Photomontage
– View north from Hang Hau Tsuen (Mitigated View Year 10)
Figure 10.1 Locations
of Proposed Air Quality Monitoring Station and Air Sensitive Receivers
Figure 10.2 Locations
of Proposed Noise Monitoring Station and Noise Sensitive Receivers
Figure 10.3 Locations
of Proposed Water Quality Monitoring Stations