Table of Contents
1.1 Background 1-1
1.2 Purpose and Scope of the EIA 1-1
1.3 EIA Study Area 1-3
1.4 Structure of the Report 1-4
2. DESCRIPTION
OF THE PROJECT 2-1
2.1 Introduction 2-1
2.2 Scope of the Project 2-1
2.3 Need of the Project 2-1
2.4 Consideration of Different Alignment Options and Built-forms 2-2
2.5 Justifications and Consideration of Alternative Built-forms 2-5
2.6 Consideration of Alternative Construction Methods and Sequences of
Works 2-6
2.7 Description of the Selected Alignment and Proposed Engineering Works 2-7
2.8 Construction Programme 2-7
2.9 Concurrent Projects 2-9
3.1 Introduction 3-1
3.2 Operational Noise 3-1
3.2.1 Environmental Legislations, Policies, Plans and Standards 3-1
3.2.2 Noise Sensitive Receivers 3-1
3.2.3 Assessment Methodology 3-11
3.2.4 Prediction and Evaluation of Noise Impacts 3-16
3.2.5 Proposed Noise Mitigation Measures 3-21
3.2.6 Assessment of Noise Impacts with the Application of Mitigation Measures 3-23
3.2.7 Residual Impact 3-33
3.2.8 Environmental Monitoring and Audit 3-33
3.2.9 Conclusions 3-34
3.3 Construction Noise 3-34
3.3.1 Environmental Legislations, Policies, Plans and Standards 3-34
3.3.2 Assessment Methodology 3-35
3.3.3 Prediction and Evaluation of Noise Impacts 3-35
3.3.4 Proposed Noise Mitigation Measures 3-40
3.3.5 Assessment of Noise Impacts with the Application of Mitigation Measures 3-43
3.3.6 Residual Impact 3-47
3.3.7 Environmental Monitoring and Audit 3-49
3.3.8 Conclusions 3-50
4.1 Introduction 4-1
4.2 Environmental Legislation, Polices, Standards and Criteria 4-1
4.3 Identification Air Sensitive Receivers 4-2
4.4 Identification of Potential Air Quality Impacts 4-7
4.5 Assessment Methodologies 4-9
4.6 Evaluation of Air Quality Impacts 4-22
4.7 Recommendations for Monitoring and Audit 4-30
4.8 Conclusions 4-31
5.1 Introduction 5-1
5.2 Environmental Legislation, Policies, Plans and Standards 5-1
5.3 Sensitive Receivers 5-8
5.4 Description of the Environment 5-8
5.5 Identification and Evaluation of Water Quality Impact 5-11
5.6 Identification and Evaluation of Cumulative Water Quality Impact 5-12
5.7 Mitigation Measures for Water Quality Impact 5-13
5.8 Residual Impacts on Water Quality 5-16
5.9 Environmental Monitoring and Audit 5-16
5.10 Conclusions 5-16
6. WASTE
MANAGEMENT IMPLICATIONS 6-1
6.1 Introduction 6-1
6.2 Environmental Legislation, Policies, Plans and Standards 6-1
6.3 Assessment Methodology 6-5
6.4 Identification of Potential Sources of Impacts 6-5
6.5 Prediction and Evaluation of Environmental Impacts 6-5
6.6 Mitigation Measures for Adverse Environmental Impacts 6-7
6.7 Evaluation of Residual Impacts 6-11
6.8 Environmental Monitoring and Audit 6-11
6.9 Land Contamination Assessment 6-11
6.10 Conclusions 6-13
7.1 Introduction 7-1
7.2 Assessment Scope 7-1
7.3 Potential Hazards Associated with Landfill Gas 7-1
7.4 Assessment Methodology 7-2
7.5 Description and History of Gin Drinkers Bay Landfill 7-4
7.6 Landfill Gas Risk Assessment 7-5
7.7 Proposed Protection and Precautionary Measures 7-13
7.8 Environmental Monitoring & Audit 7-17
7.9 Conclusions 7-17
8. LANDSCAPE
& VISUAL IMPACT ASSESSMENT 8-1
8.1 Introduction 8-1
8.2 Legislations, Policies, Plans and Standards 8-1
8.3 General Approach 8-1
8.4 Terminology 8-2
8.5 Impact Assessment 8-2
8.6 The Study Area 8-3
8.7 Consultation with Relevant Departments 8-3
8.8 Methodology for Landscape Impact Assessment 8-3
8.9 Landscape Sensitivity 8-3
8.10 Magnitude of Landscape Impacts 8-4
8.11 Significance of the Landscape Effects 8-5
8.12 Visual Assessment Methodology 8-7
8.13 Mitigation 8-8
8.14 Environmental Legislation and Guidelines 8-8
8.15 Planning & Development Review 8-9
8.16 Baseline Conditions Year 2011 8-13
8.17 Landscape Resources LR 8-16
8.18 Landscape Character Area 8-17
8.19 Landscape and visual Effect Assessment Methodology 8-18
8.20 Landscape Resources LR effects 8-19
8.21 Landscape Character Area LCA effects 8-19
8.22 Visual Effects 8-22
8.23 Visual Sensitive Receivers VSRs 8-23
8.24 Mitigations 8-26
8.25 Residual Impacts 8-29
8.26 Environmental Monitoring and Audit 8-29
8.27 Summary of Conclusions 8-29
9.1 Introduction 9-1
9.2 Yau Kom Tau Water Treatment Works Location and Operations 9-3
9.3 Tsuen Wan Road Upgrading Project 9-6
9.4 Meteorological Conditions and Population Data 9-6
9.5 Hazard Identification 9-22
9.6 Consequence Analysis 9-34
9.7 Rationalisation of Chlorine Release scenarios And estimation of Scenario Frequencies 9-45
9.8 Quantitative Risk Assessment 9-54
9.9 Conclusions and Recommendations 9-61
9.10 References 9-62
10.1 Introduction 10-1
10.2 Environmental Legislation, Policies, Plans, Standards and Criteria 10-1
10.3 Assessment Methodology 10-1
10.4 Baseline Conditions 10-2
10.5 Evaluation of Habitats 10-3
10.6 Impact Identification 10-6
10.7 Impact Evaluation 10-6
10.8 Mitigation Measures 10-8
10.9 Residual Impacts 10-8
10.10 Environmental Monitoring and Audit 10-8
10.11 Conclusions 10-8
11. CULTURAL
HERITAGE IMPACTS 11-1
11.1 Introduction 11-1
11.2 Legislations and Applicable Standards 11-1
11.3 Study Methodology 11-2
11.4 History of the Tsuen Wan Area 11-2
11.5 Potential Impacts Upon the Cultural Heritage along the Alignment 11-8
11.6 Conclusions 11-10
12. ENVIRONMENTAL
MONITORING AND AUDIT 12-1
12.1 Introduction 12-1
12.2 Noise 12-1
12.3 Air Quality 12-2
12.4 Water Quality 12-2
12.5 Landfill Gas Hazards 12-2
12.6 Waste Management 12-2
12.7 Hazard to Life 12-2
12.8 Landscape and Visual 12-3
12.9 Ecological 12-3
12.10 Cultural Heritage 12-3
13.1 Introduction 13-1
13.2 Environmental Outcomes 13-1
13.3 Noise Impacts 13-6
13.4 Air Quality Impacts 13-7
13.5 Water Quality Impacts 13-7
13.6 Waste Management Implications 13-7
13.7 Landfill Gas Hazards 13-8
13.8 Landscape & Visual Impacts 13-8
13.9 Ecological Impacts 13-8
13.10 Cultural Heritage Impacts 13-9
13.11 Hazard to Life 13-9
13.12 Environmental Monitoring and Audit 13-11
13.13 Overall Conclusion 13-11
13.14 References 13-12
14. IMPLEMENTATION
SCHEDULE OF RECOMMENDED
List of Figures
SECTION 2 |
DESCRIPTION OF THE PROJECT |
Figure 2-1 |
General
Layout of the Project |
Figure 2-2 |
Typical
Sections of Tsuen Wan Road in the Project |
Figure 2-3 |
Construction
Programme for Tsuen Wan Bypass, Widening of Tsuen Wan Road between Tsuen
Tsing Interchange and Kwai Tsing Interchange and Associated Junction
Improvement Works |
Project
Works Areas |
|
Typical
Construction Sequence |
|
Figure 2-6 Option 1 Sheet 1, 2, 3, 4, Option 2 Sheet 1, 2, 3, 4, |
Alignment
Options |
|
|
SECTION 3 |
NOISE
IMPACTS |
Figure 3-1 |
DP Road Extents of the Project |
Assessment Areas for Noise Impact Assessment |
|
Figure 3-3 |
Locations of Representative Noise Sensitive Receivers |
Figure 3-4 |
Locations of Selected Noise Assessment Points at each NSR |
Figure 3-5 |
Locations and Cross Sections of Proposed Direct Noise Mitigation Measures |
|
|
SECTION 4 |
AIR QUALITY IMPACTS |
Representative
Air Sensitive Receivers Under EIAO |
|
|
Location
of Tsuen Wan Air Quality Monitoring Station and Ching Pak House Automatic
Weather Station |
Location
of Concurrent Projects |
|
Figure 4-4 |
Location
of Chimneys |
Figure 4-5 |
Predicted
Cumulative Hourly NO2 Concentration At Worst Hit Level 1.5m Above Ground |
Figure 4-6 |
Predicted
Cumulative Daily NO2 Concentration At Worst Hit Level 1.5m Above Ground |
Figure 4-7 |
Predicted
Cumulative Daily RSP Concentration At Worst Hit Level 1.5m Above Ground |
|
|
SECTION 5 |
WATER
QUALITY IMPACTS |
|
Locations
of Water Sensitive Receivers and EPD Routine Water Quality Monitoring
Stations |
|
|
SECTION 6 |
WASTE
MANAGEMENT IMPLICATIONS |
Figure 6-1 |
Locations
and Associated Extent of Cut and Fill Areas |
Figure 6-2 |
Location
of Potential Contamination Land Uses
|
|
|
SECTION 7 |
LANDFILL
GAS HAZARD |
Location
of Tsuen Wan Road Relative To Gin Drinkers Bay Landfill |
|
Consultation
Zone of Gin Drinkers Bay Landfill and Locations of Landfill Gas Monitoring
Points |
|
Diverted
Utility Routes to be Designated as “Special Routes” |
|
Details of Possible Cut-off Barriers for New Utilities Crossing Consultation Zone |
|
|
|
SECTION 8 |
LANDSCAPE
AND VISUAL IMPACTS |
Tsuen Wan Outline Zoning Plan Plan No. S/TW/25 |
|
Kwai Chung Outline Zoning Plan Plan No. S/KC/21 |
|
Baseline Landscape Resources & Landscape Character Areas and Photographs |
|
Landscape Character Areas On Site Photos |
|
Visual Envelope |
|
Zone of Visual Influence and Key Visual Sensitive Receptors VSRs |
|
Conceptual Landscape Layout (Sheet 1 of 5) Conceptual Landscape Layout (Sheet 2 of 5) Conceptual Landscape Layout (Sheet 3 of 5) Conceptual Landscape Layout (Sheet 4 of 5) Conceptual Landscape Layout (Sheet 5 of 5) |
|
Conceptual Landscape Layout and Photomontages – 1 |
|
Conceptual Landscape Layout and Photomontages – 2 |
|
Conceptual Landscape Layout and Photomontages – 3 |
|
Conceptual Landscape Layout and Photomontages – 4 |
|
Conceptual Landscape Layout and Photomontages – 5 |
|
Schedule of Landscape Resources & Characters Effects |
|
Schedule of Visual Effects |
|
Road Cross Sections (Sheet 1 of 3) Road Cross Sections (Sheet 2 of 3) Road Cross Sections (Sheet 3 of 3) |
|
Details of Bridge Deck Planter |
|
Details of Planter at Bridge Pier |
|
Images
of Propose Planter |
|
Figure 8-19 |
Tree Survey Plan |
|
|
SECTION
9 |
HAZARD
TO LIFE |
Site
Layout of Yau Kom Tau Water Treatment Works |
|
Site
Location of Yau Kom Tau WTW |
|
Tsuen
Wan Road Upgrading Project and the Developments Planned in its Vicinity |
|
Population
Map |
|
Scheme
of Traffic Lanes included in the Traffic Impact Assessment for the Project |
|
Frequency
Number FN Curves for “Background” General Population |
|
Frequency
Number FN Curves for “Updated” General Population |
|
Individual
Risk Levels |
|
|
|
SECTION 10 |
ECOLOGICAL IMPACTS |
Figure 10-1 |
Habitat
Map of Study Area for Ecological Impact Assessment |
|
|
SECTION 11 |
CULTURAL HERITAGE IMPACTS |
Historic
Settlement Pattern in Tsuen Wan |
List of Appendices
Appendix 3 |
|
Photos of Representative Noise Sensitive Receivers |
|
Building
Layout Plans of Planned NSRs – Residential Developments at TW5, TW6, TW7 and
TWTL 394 |
|
Photos
of NSRs which are Government Aided Schools |
|
Source
of Information Showing Government Aided Schools Under the “Noise Abatement
Programme” |
|
Photos of NSRs with Window-type Air-conditioners Installed |
|
Source of Information Showing the Land Uses as Service Apartments with the Application of Central Air Conditioning for Chelsea Court TWTL 373, Indi Home TWTL 406 and H-Cube TWTL 407 |
|
Correspondences for the Endorsement of the Final TIA Review Report Issued in January 2007 |
|
Traffic
Forecast at Year 2010 and Year 2030 in the Final TIA Review Report Issued in
January 2007 |
|
Locations and Photos of Existing Noise Mitigation Measures on Route 9 in Front of Summit Terrace and on Tsuen King Circuit |
|
Locations of Planned Noise Mitigation Measures on Tuen Mun Road and on Yeung Uk Road |
|
Correspondence
for Information of Planned Noise Mitigation Measures and Low Noise Surfacing
Pavement |
|
Typical
Computer Plot of the “RoadNoise® 2000” Model |
|
Detailed Calculations for Construction Noise Impact Assessment and Complete PME Inventory |
|
Detailed Predicted Road Traffic Noise Results at Each Noise Assessment Point under the Unmitigated Scenario |
|
Detailed
Predicted Road Traffic Noise Results at Each Noise Assessment Point under the
Mitigated Scenario |
|
Correspondence Showing the Anticipated Development Completion Dates of Residential Development at TW5 and TW7 |
|
|
|
Appendix 4 |
|
Photos of Air Sensitive Receivers |
|
Road Link Map |
|
Adjustments on Exhaust Technology Fractions |
|
Estimated population in year 2015, 2020, 2025, 2030 |
|
Trips per VMT |
|
Details of Annual Traffic Census Core Station 5010, 5018, 5026, 5030 and 5035 |
|
Meteorology Information |
|
Sensitivity Test of Emission Inventory and Calculation of Emission Factors |
|
Speed Fraction |
|
Sensitivity Test Speed Fraction |
|
Surface Roughness |
|
Supplementary Information for CALINE4 Model |
|
Calculation of Portal Emission |
|
Photographic Survey for Chimney Inventory |
|
Request Letter and Responses for Chimney Inventory |
|
Chimney Emission Inventory |
|
Calculation of Air Quality Inside Full Noise Enclosure |
|
Sample Input Files of EMFAC-HK Model |
|
Sample Input Files of CALINE4 Model |
|
Sample Input Files of ISCST3 Model |
|
Predicted Worst Case Average Pollutant Concentrations at ASRs |
|
|
|
Appendix 8 |
|
Tree Schedule |
|
Conceptual Planting Plan |
|
|
|
Appendix 9 |
|
DRIFT Flat Terrain Dispersion Modelling |
|
Wind Tunnel Test Results |
|
CFD Modelling Results for Sha Tin WTW and Tai Po Tau WTW |
|
Application of Dispersion Modelling Results in QRA |
|
Chlorine Cloud Height Predictions |
|
Modelling of Escape from Chlorine Cloud |
|
Seismic Hazard Assessment |
|
Aircraft Crash Frequency Assessment |
|
Frequency Estimation |
|
Traffic Projections from the Project Traffic Impact Assessment |
|
Probability of Fatality for the Indoor Population |
|
|
|
Appendix
10 |
|
Flora Species Recorded at Different Habitats |