Agreement No. CE5/95

Central-Wan Chai Bypass and Island Eastern Corridor Link

Project Review Study

ENVIRONMENTAL IMPACT ASSESSMENT REPORT

TABLE OF CONTENTS

1. INTRODUCTION

1.1 Project Background

1.2 Objectives of the EIA Study

1.3 Considerations of Environmental Impact Assessment Ordinance

1.4 Structure of EIA Report

2. PROJECT DESCRIPTION

2.1 Project Location

2.2 Development Requirements, Scope and Benefits

2.3 EIA Study Area

2.4 Project Design

2.5 Construction Methods and Engineering Requirements

2.6 Operation of the Project

2.7 Works Programme

2.8 "Without the Project" Scenario

2.9 Concurrent Projects

3. AIR QUALITY

3.1 Introduction

3.2 Environmental Legislation, Policies, Plans, Standards and Criteria

3.3 Description of the Environment

3.4 Sensitive Receivers

3.5 Assessment Methodology

3.6 Identification of Environmental Impacts

3.7 Prediction and Evaluation of Environmental Impacts

3.8 Mitigation of Adverse Environmental Impacts

3.9 Evaluation of Residual Impacts

3.10 Environmental Monitoring and Audit

3.11 Conclusion

4. NOISE

4.1 Introduction

4.2 Environmental Legislation, Policies, Plans, Standards and Criteria

4.3 Description of the Environment

4.4 Sensitive Receivers

4.5 Assessment Methodology

4.6 Prediction and Evaluation of Environmental Impacts

4.7 Mitigation of Adverse Environmental Impacts

4.8 Evaluation of Residual Impacts

4.9 Environmental Monitoring and Audit

4.10 Conclusion

5. WATER QUALITY

5.1 Introduction

5.2 Environmental Legislation, Policies, Plans, Standards and Criteria

5.3 Description of the Environment

5.4 Water Sensitive Receivers

5.5 Assessment Methodology

5.6 Identification of Environmental Impacts

5.7 Prediction and Evaluation of Environmental Impacts

5.8 Mitigation of Adverse Environmental Impacts

5.9 Evaluation of Residual Impacts

5.10 Environmental Monitoring and Audit

5.11 Conclusion

6. CONSTRUCTION WASTE MANAGEMENT AND DISPOSAL

6.1 Introduction

6.2 Environmental Legislation, Policies, Plans, Standards and Criteria

6.3 Assessment Methodology

6.4 Identification of Environmental Impacts

6.5 Prediction and Evaluation of Environmental Impacts

6.6 Recycling, Treatment, Storage and Disposal Options

6.7 Mitigation of Adverse Environmental Impacts

6.8 Evaluation of Residual Impacts

6.9 Environmental Monitoring and Audit

6.10 Conclusion

7. LANDSCAPE AND VISUAL IMPACT ASSESSMENT

7.1 Introduction

7.2 Scope and Content of Study

7.3 Review of the Planning and Development Control Framework

7.4 Baseline Conditions

7.5 Potential Impacts

7.6 Mitigation Measures

7.7 Conclusion – Residual Impacts and Predicted Acceptability of the Project

8. ENVIRONMENTAL MONITORING AND AUDIT

8.1 Introduction

8.2 Air Quality Impact

8.3 Noise Impact

8.4 Water Quality Impact

8.5 Waste Management

8.6 Landscape and Visual

9. CONCLUSION

9.1 Introduction

9.2 Air Quality Impact

9.3 Noise Impact

9.4 Water Quality Impact

9.5 Construction Waste Management and Disposal

9.6 Landscape and Visual Impact

9.7 Overall Conclusion

10. IMPLEMENTATION SCHEDULE OF THE PROPOSED MITIGATION MEASURES

List of Tables

Table 2.1 Projects that may be Undertaken Simultaneously with the CWB & IECL Project

Table 3.1 Hong Kong Air Quality Objectives

Table 3.2 Tunnel Air Quality Criteria

Table 3.3 Annual Average Concentrations of Pollutants in 1999

Table 3.4 Locations of Air Sensitive Receivers

Table 3.5 Emission Factors for Construction Activities

Table 3.6 Different Major Dust Generating Activities in the Worst-case Scenarios during Construction Phase

Table 3.7 Emission Factors for Year 2011 for Different Vehicle Categories (EURO3)

Table 3.8 Portal and Ventilation Building Emissions

Table 3.9 Design of the Ventilation Buildings

Table 3.10 Predicted Cumulative 1-hour Average TSP Concentration for Scenarios 1 to 10 (Unmitigated)

Table 3.11 Predicted Cumulative 24-hour Average TSP Concentration for Scenarios 1 to 10 (Unmitigated)

Table 3.12 Predicted Cumulative 1-hour Average NO₂, 24-hour Average NO₂, 24-hour Average RSP and 1-hour Average CO Concentrations at the Representative ASRs at 1.5 m above ground

Table 3.13 Predicted Cumulative 1-hour Average TSP Concentration for Scenarios 1 to 10 (Mitigated)

Table 3.14 Predicted Cumulative 24-hour Average TSP Concentration for Scenarios 1 to 10 (Mitigated)

Table 4.1 Construction Noise Criteria for Activity other than Percussive Piling

Table 4.2 Acceptable Noise Levels for Percussive Piling

Table 4.3 Permitted Hours of Operation for Percussive Piling

Table 4.4 Acceptable Noise Level for Fixed Plant Noise

Table 4.5 Summary of Identified Existing Noise Sensitive Receivers

Table 4.6 Summary of Representative Existing Noise Sensitive Receivers for Construction Noise Impact Assessment

Table 4.7 Summary of Representative Existing and Planned Noise Sensitive Receivers for Traffic Noise Impact Assessment

Table 4.8 Summary of Selected Noise Sensitive Receivers for Fixed Noise Impact Assessment

Table 4.9 The Number of Exhaust Fans required for Proposed Ventilation Buildings during Normal Condition

Table 4.10 Summary of Unmitigated Construction Noise Levels during Normal Daytime Working Hours

Table 4.11 Predicted Fixed Noise Levels at NSRs (L_{eq, 30 min} dB(A))

Table 4.12 Summary of Mitigated Construction Noise Levels at Representative NSRs during Normal Daytime Working Hours

Table 5.1 Summary of Water Quality Objectives for the Victoria Harbour WCZ

Table 5.2 WSD Standards at Seawater Intakes

Table 5.3 Summary Statistics of EPD Marine Water Quality data in Victoria Harbour WCZ for 1998

Table 6.1 Excavated Material from Works Managed by Highways Department

Table 6.2 Excavated Material for Work Entrusted to Territory Development Department

Table 6.3 Estimated Quantities of C&D Material from New Building Construction

Table 6.4 Estimated Quantities of Demolition Material

Table 6.5 Summary of the C&D Material requiring disposal off-site arising from the CWB & IECL Project

Table 7.1 Matrix for Assessment of Significance of Landscape Impact

Table 7.2 Matrix for Assessment of Significance of Visual Impact

Table 7.3 Summary of Landscape Impact Assessment

Table 7.4 Summary of Visual Impact Assessment - Impacts on Visual Receivers

Table 7.5 Proposed Landscape and Visual Mitigation Measures

Table 8.1 Tunnel Air Quality Guidelines

Table 10.1 Implementation Schedule for Air Quality Control

Table 10.2 Implementation Schedule for Noise Control

Table 10.3 Implementation Schedule for Water Quality Control

Table 10.4 Implementation Schedule for Construction Waste Management

Table 10.5 Implementation Schedule for Landscape and Visual Impact Mitigation

Table 10.6 Implementation Schedule for Other EIA Requirements

List of Figures

Figure 2.1 Location and Alignment of CWB & IECL

Figure 2.2 Project Relationship Key Plan (Sheet 1 of 3)

Figure 2.3 Project Relationship Key Plan (Sheet 2 of 3)

Figure 2.4 Project Relationship Key Plan (Sheet 3 of 3)

Figure 2.5 Trunk Road Scheme Option A - Tunnel and Flyover Scheme

Figure 2.6 Trunk Road Scheme Option B - Flyover Scheme

Figure 2.7 Trunk Road Scheme Option C - Flyover Scheme with Alignment close to the Shoreline

Figure 2.8 Trunk Road Scheme Option D - Flyover Scheme with Alignment along the Breakwater

Figure 2.9 Trunk Road Scheme Option E - Tunnel Scheme with Alignment close to the Shoreline

Figure 2.10 Trunk Road Scheme Option F - Cut and Cover and Tunnel Scheme with Alignment close to the breakwater

Figure 2.11 Trunk Road Scheme Option F - Cut and Cover and Tunnel Scheme with Alignment close to the breakwater

Figure 2.12 Trunk Road Scheme Option F1 - Immersed Tunnel Scheme

Figure 2.13 Trunk Road Scheme Option G - At Grade Road Scheme

Figure 2.14.1 Construction Programme of the CWB & IECL

Figure 2.14.2 Construction Programme of the CWB & IECL

Figure 2.14.3 Construction Programme of the CWB & IECL

Figure 3.1.1 Locations of Representative Air Sensitive Receivers

Figure 3.1.2 Locations of Representative Air Sensitive Receivers

Figure 3.2.1 Locations of Construction Sites

Figure 3.2.2 Locations of Construction Sites

Figure 3.3.1 2027 AM Peak Hour Forecast Traffic Flow

Figure 3.3.2 2027 AM Peak Hour Forecast Traffic Flow

Figure 3.3.3 2027 AM Peak Hour Forecast Traffic Flow

Figure 3.3.4 2027 AM Peak Hour Forecast Traffic Flow

Figure 3.3.5 2027 AM Peak Hour Forecast Traffic Flow

Figure 3.3.6 2027 AM Peak Hour Forecast Traffic Flow

Figure 3.4.1 Locations of Portals and Ventilation Buildings Emissions

Figure 3.4.2 Locations of Portals and Ventilation Buildings Emissions

Figure 3.5.1 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.5.2 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.5.3 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.5.4 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.6.1 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 10 m Above Ground

Figure 3.6.2 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 10 m Above Ground

Figure 3.6.3 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 10 m Above Ground

Figure 3.6.4 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 10 m Above Ground

Figure 3.7.1 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 20 m Above Ground

Figure 3.7.2 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 20 m Above Ground

Figure 3.7.3 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 20 m Above Ground

Figure 3.7.4 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 20 m Above Ground

Figure 3.8.1 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 30 m Above Ground

Figure 3.8.2 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 30 m Above Ground

Figure 3.8.3 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 30 m Above Ground

Figure 3.8.4 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 30 m Above Ground

Figure 3.9.1 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 70 m Above Ground

Figure 3.9.2 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 70 m Above Ground

Figure 3.9.3 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 70 m Above Ground

Figure 3.9.4 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 70 m Above Ground

Figure 3.10.1 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 110 m Above Ground

Figure 3.10.2 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 110 m Above Ground

Figure 3.10.3 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 110 m Above Ground

Figure 3.10.4 Contours of Cumulative Maximum 1-Hour Average NO₂ Concentration in mg m^-3 at 110 m Above Ground

Figure 3.11.1 Contours of Cumulative Maximum 24-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.11.2 Contours of Cumulative Maximum 24-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.11.3 Contours of Cumulative Maximum 24-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.11.4 Contours of Cumulative Maximum 24-Hour Average NO₂ Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.12.1 Contours of Cumulative Maximum 24-Hour Average RSP Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.12.2 Contours of Cumulative Maximum 24-Hour Average RSP Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.12.3 Contours of Cumulative Maximum 24-Hour Average RSP Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.12.4 Contours of Cumulative Maximum 24-Hour Average RSP Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.13.1 Contours of Cumulative Maximum 1-Hour Average CO Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.13.2 Contours of Cumulative Maximum 1-Hour Average CO Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.13.3 Contours of Cumulative Maximum 1-Hour Average CO Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.13.4 Contours of Cumulative Maximum 1-Hour Average CO Concentration in mg m^-3 at 1.5 m Above Ground

Figure 3.14.1 Contours of Cumulative Maximum 1-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 3.14.2 Contours of Cumulative Maximum 1-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 3.14.3 Contours of Cumulative Maximum 1-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 3.14.4 Contours of Cumulative Maximum 1-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 3.15.1 Contours of Cumulative Maximum 24-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 3.15.2 Contours of Cumulative Maximum 24-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 3.15.3 Contours of Cumulative Maximum 24-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 3.15.4 Contours of Cumulative Maximum 24-Hour Average TSP Concentration in mg m^-3 at 1.5 m Above Ground (Mitigated)

Figure 4.1.1 Locations of Representative Noise Sensitive Receivers (Sheet 1 of 2)

Figure 4.1.2 Locations of Representative Noise Sensitive Receivers (Sheet 2 of 2)

Figure 4.2.1 The Extent of Porous Asphalt Road Surfacing

Figure 4.2.2 The Extent of Porous Asphalt Road Surfacing

Figure 4.3 Locations of Ventilation Buildings

Figure 4.4.1 Locations of Noise Mitigation Measures (Sheet 1 of 2)

Figure 4.4.2 Locations of Noise Mitigation Measures (Sheet 2 of 2)

Figure 7.1 Location Plan and Landscape Impact Study Area

Figure 7.2.1 Works Layout Plan

Figure 7.2.2 Works Layout Plan

Figure 7.2.3 Works Layout Plan

Figure 7.3.1 Landscape Resources and Distinct Landscape Areas Plan

Figure 7.3.2 Landscape Resources and Distinct Landscape Areas Plan

Figure 7.3.3 Landscape Resources and Distinct Landscape Areas Plan

Figure 7.3.4 Existing Significant Trees

Figure 7.4 Visual Envelope and Key Views Location

Figure 7.5 Locations of Key Visual Sensitive Receivers

Figure 7.6.1 Mitigation Measures

Figure 7.6.2 Mitigation Measures

Figure 7.6.3 Mitigation Measures

Figure 7.6.4 Mitigation Measures

Figure 7.6.5 Mitigation Measures

Figure 7.6.6 Mitigation Measures

Figure 7.6.7 Mitigation Measures

Figure 7.6.8 Mitigation Measures

Figure 7.6.9 Typical Section

Figure 7.6.10 Typical Section

Figure 7.7.1 Schematic Design of Noise Barriers

Figure 7.7.2 Schematic Design of Semi-Enclosure Noise Barrier

Figure 7.8 Photomontage Location Plan

Figure 7.9.1 Photomontage View 1

Figure 7.9.2 Photomontage View 1

Figure 7.10.1 Photomontage View 2

Figure 7.10.2 Photomontage View 2

Figure 7.11.1 Photomontage View 3

Figure 7.11.2 Photomontage View 3

Figure 7.12.1 Photomontage View 8

Figure 7.12.2 Photomontage View 8

Figure 7.12.3 Photomontage View 8

Figure 7.13 Rumsey Street Flyover View 4

Figure 7.14 West Ventilation Building and Portal View 5

Figure 7.15 Central Ventilation Building View 6

Figure 7.16 East Ventilation and Administration Building View 7

List of Appendices

Appendix 2.1 Trunk Road Options

Appendix 3.1 Summary of Major Dust Generating Activities

Appendix 3.2 Calculation of Dust Emission Factors

Appendix 3.3 Sample Computer Output of FDM Calculation

Appendix 3.4 Calculation of Emission Factor in Year 2027 (Open Road)

Appendix 3.5 Sample Computer Output of CALINE4 Calculation

Appendix 3.6 Calculation of Emission Factor in Year 2027 (Portal)

Appendix 3.7 Sample Computer Output of ISCST3 Calculation

Appendix 3.8 Dust Levels from Different Construction Activities (Unmitigated)

Appendix 3.9 Summary of the Predicted Cumulative 1-Hour NO₂, 24-Hour NO₂, 24-Hour RSP and 1-Hour CO Concentrations at Elevations from 1.5 m to 150 m above Ground

Appendix 3.10 Dust Levels from Different Construction Activities (Mitigated)

Appendix 4.1 Powered Mechanical Equipment (PME) for Different Construction Tasks

Appendix 4.2 Construction Noise Calculation

Appendix 4.3 Locations of ‘New’ Roads

Figure A4.1 Locations of New Roads for CWB Project (Sheet 1 of 3)

Figure A4.2 Locations of New Roads for CWB Project (Sheet 2 of 3)

Figure A4.3 Locations of New Roads for CWB Project (Sheet 3 of 3)

Appendix 4.4 Traffic Noise Assessment Results

Appendix 4.5 Sample Output File

Appendix 4.6 Ventilation Shaft Noise Assessment

Appendix 4.7 Eligibility Assessment for Indirect Technical Remedies

Appendix 4.8 IEC Link Construction Staging

Figure A4.4 IEC Link Construction Staging Stage 1

Figure A4.5 IEC Link Construction Staging Stage 2

Figure A4.6 IEC Link Construction Staging Stage 3A

Figure A4.7 IEC Link Construction Staging Stage 3B

Figure A4.8 IEC Link Construction Staging Stage 4A

Figure A4.9 IEC Link Construction Staging Stage 4B

Figure A4.10 IEC Link Construction Staging Stage 5

Figure A4.11 IEC Link Construction Staging Stage 6

Appendix 4.9 Endorsed Letter for Traffic Flow Year 2027 from Transport Department

Appendix 7.1 Compensatory Planting Indicative Species List

List of Annex

Annex A Cultural Heritage Review

Figure AN1.1 Identified Historical Buildings and Structures (Sheet 1 of 2)

Figure AN1.2 Identified Historical Buildings and Structures (Sheet 2 of 2)

Figure AN2 Location of Kellett Island Archaeological Site