TABLE OF CONTENT

 

1             INTRODUCTION. 1-1

1.1           Project Background. 1-1

1.2           Designated Projects under EIAO.. 1-1

1.3           Purpose of the EIA Study. 1-2

1.4           Objectives of this EIA Study. 1-2

1.5           Structure of the EIA Report 1-2

 

 

2             PROJECT DESCRIPTION. 2-1

2.1           Description of Site Location and Site History of the Project 2-1

2.2           Size, Scale, Shape and Design of the Project 2-1

2.3           Purpose, Objective and Benefits of the Project 2-1

2.4           The Need for the Project 2-2

2.5           Scenario without the Project 2-2

2.6           Consideration of Alternative Design and Layout of Road. 2-3

2.7           Selected Option. 2-3

2.8           Fine-tuned Enhanced NER Arrangement (Option 4) 2-6

2.9           Consequences of Not Proceeding with the Project 2-7

2.10         Consideration of Alternative Construction Methods. 2-7

2.11         Construction Programme. 2-9

2.12         Concurrent Projects. 2-10

2.13         Public Concern. 2-10

 

 

3             Air Quality Impact. 3-1

3.1           Introduction. 3-1

3.2           Environmental Legislations, Standards and Guidelines. 3-1

3.3           Description of Environment 3-2

3.4           Identification of Air Sensitive Receivers. 3-3

3.5           Identification of Environmental Impacts. 3-7

3.6           Assessment Methodology. 3-9

3.7           Prediction and Evaluation of Environmental Impacts. 3-16

3.8           Mitigation of Adverse Environmental Impacts. 3-20

3.9           Evaluation of Residual Impacts. 3-22

3.10         Environmental Monitoring and Audit 3-22

3.11         Conclusion. 3-22

 

 

4             Noise Impact. 4-1

4.1           Introduction. 4-1

4.2           Environmental Legislation, Standards and Criteria. 4-1

4.3           Description of Environment 4-3

4.4           Noise Sensitive Receivers. 4-3

4.5           Identification of Environmental Impacts. 4-4

4.6           Assessment Methodology. 4-5

4.7           Prediction and Evaluation of Environmental Impacts. 4-8

4.8           Mitigation of Adverse Environmental Impacts. 4-9

4.9           Evaluation of Residual Impacts. 4-10

4.10         Environmental Monitoring and Audit 4-10

4.11         Conclusion. 4-10

 

5             water quality impact. 5-1

5.1           Introduction. 5-1

5.2           Environmental Legislation, Standards and Criteria. 5-1

5.3           Description of Environment 5-4

5.4           Water Sensitive Receivers (WSRs) 5-6

5.5           Identification of Potential Impacts. 5-7

5.6           Assessment Methodology. 5-7

5.7           Water Quality Impact Assessment 5-8

5.8           Cumulative Impacts from Concurrent Project 5-9

5.9           Water Quality Mitigation Measures. 5-9

5.10         Residual Water Quality Impacts. 5-12

5.11         Environmental Monitoring and Audit Requirements. 5-12

5.12         Conclusion. 5-12

 

 

6             WASTE MANAGEMENT IMPLICATION. 6-1

6.1           Introduction. 6-1

6.2           Environmental Legislations, Standards and Guidelines. 6-1

6.3           Description of Environment 6-3

6.4           Identification of Waste Management Implications. 6-3

6.5           Assessment Methodology. 6-4

6.6           Prediction and Evaluation of Waste Management Implications. 6-5

6.7           Mitigation of Adverse Environmental Impacts. 6-10

6.8           Evaluation of Residual Impacts. 6-15

6.9           Environmental Monitoring and Audit Requirements. 6-15

6.10         Conclusion. 6-15

 

 

7             LAND CONTAMINATION. 7-1

7.1           Introduction. 7-1

7.2           Environmental Legislation, Standards and Criteria. 7-1

7.3           Assessment Methodology. 7-1

7.4           Description of Environment 7-2

7.5           Site Appraisal 7-2

7.6           Prediction and Evaluation of Land Contamination Impacts. 7-5

7.7           Evaluation of Residual Impacts. 7-5

7.8           Environmental Monitoring and Audit 7-5

7.9           Conclusion. 7-6

 

 

8             LANDSCAPE AND VISUAL. 8-1

8.1           Introduction. 8-1

8.2           Environmental Legislation, Standards and Criteria. 8-1

8.3           Assessment Methodologies. 8-2

8.4           Review of the Planning and Development Control Framework. 8-6

8.5           Baseline Study. 8-8

8.6           Landscape Impact Assessment 8-12

8.7           Visual Impact Assessment 8-14

8.8           Landscape and Visual Mitigation Measures. 8-18

8.9           Residual Impact 8-20

8.10         Cumulative Impacts Assessment from Concurrent Project 8-28

8.11         Environmental Monitoring and Audit 8-28

8.12         Conclusion. 8-28

 

 

9             Environmental Monitoring and Audit Requirements. 9-1

9.1           Introduction. 9-1

9.2           Air Quality Impact 9-1

9.3           Noise Impact 9-1

9.4           Water Quality Impact 9-1

9.5           Waste Management Implications. 9-2

9.6           Land Contamination. 9-2

9.7           Landscape and Visual Impacts. 9-2

 

 

10            SUMMARY OF ENVIRONMENTAL OUTCOMES. 10-1

10.1         Overview. 10-1

10.2         Environmental Benefits of the Project 10-1

10.3         Incorporation of Environmentally Friendly Options. 10-1

10.4         Environmental Design Recommended. 10-1

10.5         Key Environmental Problems Avoided and Environmentally Sensitive Areas Protected. 10-2

10.6         Environmental Protection Measures Recommended. 10-3

10.7         Estimation of Population Protected. 10-4

 

 

11            Conclusions. 11-1

11.1         Conclusion of EIA Study. 11-1

 

 

List of Tables

 

Table 2.1              Summary of Comparison under Traffic Requirement

Table 2.2              Summary of Comparison under Constructability, and Land and Statutory Feasibility

Table 2.3              Summary of Environmental Considerations

Table 2.4              Comparison of Construction Methods

Table 3.1              Hong Kong Air Quality Objectives

Table 3.2              Average Concentrations of Pollutants in the Recent Five Years (Year 2015 – 2019) at Sham Shui Po EPD Air Quality Monitoring Station

Table 3.3              Background Air Pollutants Concentrations in Year 2020 Extracted from the PATH-2016 Model

Table 3.4              Representative Air Sensitive Receivers in the vicinity of the Project

Table 3.5              Tentative Transportation Routings

Table 3.6              Predicted Worst-case Cumulative Concentrations at Representative Air Sensitive Receivers under Revised Austin Road Flyover Scenario

Table 3.7              Comparison of Annual Average NO2 Concentrations between 2 Scenarios at Selected ASRs and Assessment Levels with Exceedances of AQOs

Table 4.1              Area Sensitivity Ratings (ASRs)

Table 4.2              Construction Noise Criteria for Activities Other Than Percussive Piling

Table 4.3              Details of Representative Noise Sensitive Receivers

Table 4.4              Summary of Unmitigated Construction Noise Assessment Results due to the Project

Table 4.5              Summary of Unmitigated Cumulative Construction Noise Assessment Results

Table 4.6              Summary of Unmitigated Road Traffic Noise Assessment Results

Table 5.1              Summary of Water Quality Objectives for Victoria Harbour (Phase Two) WCZ

Table 5.2              Water Quality Criteria of Sea Water for Flushing Supply

Table 5.3              Summary Statistics of Marine Water Quality of Victoria Harbour WCZ Collected by EPD in 2018

Table 5.4              Summary Statistics of Marine Water Quality of New Yau Ma Tei Typhoon Shelter Collected by EPD in 2018

Table 6.1              Estimated Quantities of C&D Materials during Construction Phase

Table 6.2              C&D Materials Generated from Demolition of Existing Carriageways

Table 6.3              C&D Materials Generated from Site Clearance / Set-up / Plant Mobilization, Underground Utilities Protection and Diversion Works, Piling Works, Pile Cap / Pier / Abutment Construction

Table 6.4              C&D Materials Generated from Falsework / Deck Construction

Table 6.5              C&D Materials Generated from Drainage and Pavement Construction

Table 6.6              Tentative Transportation Routings for Waste Disposal During Construction Phase

Table 6.7              Summary of Waste Generation, Waste Handling Procedures and Disposal Outlets

Table 7.1              Aerial Photographs Reviewed

Table 7.2              Registered Chemical Waste Producers

Table 8.1              Relationship between Landscape Sensitivity and Magnitude of Change in Defining Impact Significance

Table 8.2              Relationship between VSRs Sensitivity and Magnitude of Change in Defining Impact Significance

Table 8.3              Summary of the Review of Planning and Development Control Framework

Table 8.4              Baseline LRs and their Sensitivity

Table 8.5              Baseline LCAs and their Sensitivity

Table 8.6              Baseline VSRs and their Sensitivity

Table 8.7              Magnitude of Landscape Impacts during Construction and Operation

Table 8.8              Magnitude of Visual Impacts during Construction and Operation

Table 8.9              Landscape and Visual Mitigation Measures for Construction Phase

Table 8.10             Landscape and Visual Mitigation Measures for Operation Phase

Table 8.11             Significance of Landscape Impacts Before and After Mitigation Measures in Construction and Operation Phases

Table 8.12             Significance of Visual Impacts Before and After Mitigation Measures in the Construction Phase and Operation Phase

Table 10.1             Summary of Key Environmental Problems Avoided and Sensitive Areas Protected

Table 10.2             Key Recommended Mitigation Measures

Table 11.1             Summary of Key Environmental Outcomes and Benefits

 

 

List of Drawings

 

Figure 1.1

Location Plan of the Proposed Revised Austin Road Flyover

Figure 1.2

Revision of Project Boundary

Figure 2.1

Land Uses in the Vicinity of the Project

Figure 2.2

Original Austin Road Flyover

Figure 2.3

Schematic Road Alignment of Option 1

Figure 2.4

Schematic Road Alignment of Option 2

Figure 2.5

Schematic Road Alignment of Option 3

Figure 2.6

Schematic Road Alignment of the Project

Figure 2.7

Vertical Alignment of the Project

Figure 2.8

Phasing of Construction Works

Figure 3.1

Locations of Concerned PATH Grids

Figure 3.2

Locations of Representative Air Sensitive Receivers

Figure 3.3

Locations of Portals, Underpass Top Openings, Ventilation Building and Ventilation Exhausts

Figure 3.4

Locations of Marine Emission Sources

Figure 3.5

Original Austin Road Flyover Scenario and Revised Austin Road Flyover Scenario

Figure 3.6a

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 1.5m Above Ground (Scenario 1)

Figure 3.6b

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 1.5m Above Ground (Scenario 2)

Figure 3.6c

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 1.5m Above Ground (Scenario 3)

Figure 3.6d

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 15m Above Ground (Scenario 1)

Figure 3.6e

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 15m Above Ground (Scenario 2)

Figure 3.6f

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 15m Above Ground (Scenario 3)

Figure 3.6g

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 20m Above Ground (Scenario 1)

Figure 3.6h

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 20m Above Ground (Scenario 2)

Figure 3.6i

Contours of Cumulative 19th Highest 1-hour NO2 Concentration (µg/m3) at 20m Above Ground (Scenario 3)

Figure 3.7a

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 1.5m Above Ground (Scenario 1)

Figure 3.7b

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 1.5m Above Ground (Scenario 2)

Figure 3.7c

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 1.5m Above Ground (Scenario 3)

Figure 3.7d

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 15m Above Ground (Scenario 1)

Figure 3.7e

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 15m Above Ground (Scenario 2)

Figure 3.7f

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 15m Above Ground (Scenario 3)

Figure 3.7g

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 20m Above Ground (Scenario 1)

Figure 3.7h

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 20m Above Ground (Scenario 2)

Figure 3.7i

Contours of Cumulative Annual NO2 Concentration (µg/m3) at 20m Above Ground (Scenario 3)

Figure 3.8a

Contours of Cumulative 10th Highest Daily RSP Concentration (µg/m3) at 1.5m Above Ground (Scenario 3)

Figure 3.8b

Contours of Cumulative 10th Highest Daily RSP Concentration (µg/m3) at 15m Above Ground (Scenario 3)

Figure 3.8c

Contours of Cumulative 10th Highest Daily RSP Concentration (µg/m3) at 20m Above Ground (Scenario 3)

Figure 3.9a

Contours of Cumulative Annual RSP Concentration (µg/m3) at 1.5m Above Ground (Scenario 3)

Figure 3.9b

Contours of Cumulative Annual RSP Concentration (µg/m3) at 15m Above Ground (Scenario 3)

Figure 3.9c

Contours of Cumulative Annual RSP Concentration (µg/m3) at 20m Above Ground (Scenario 3)

Figure 3.10a

Contours of Cumulative 10th Highest Daily FSP Concentration (µg/m3) at 1.5m Above Ground (Scenario 3)

Figure 3.10b

Contours of Cumulative 10th Highest Daily FSP Concentration (µg/m3) at 15m Above Ground (Scenario 3)

Figure 3.10c

Contours of Cumulative 10th Highest Daily FSP Concentration (µg/m3) at 20m Above Ground (Scenario 3)

Figure 3.11a

Contours of Cumulative Annual FSP Concentration (µg/m3) at 1.5m Above Ground (Scenario 3)

Figure 3.11b

Contours of Cumulative Annual FSP Concentration (µg/m3) at 15m Above Ground (Scenario 3)

Figure 3.11c

Contours of Cumulative Annual FSP Concentration (µg/m3) at 20m Above Ground (Scenario 3)

Figure 4.1

Locations of Noise Sensitive Receivers

Figure 4.2

Extent of “Project” Roads Under the Project

Figure 4.3

Extent of Low Noise Road Surface on Existing Roads within Study Area

Figure 5.1

Locations of Marine Water Sensitive Receivers and EPD Monitoring Stations

Figure 6.1

Tentative Location of Stockpiling Area

Figure 7.1

General Layout Plan of Revised Austin Road Flyover

Figure 7.2

Photographic Records of Site Reconnaissance (Sheet 1 of 2)

Figure 7.3

Photographic Records of Site Reconnaissance (Sheet 2 of 2)

Figure 8.1

Review of Planning and Development Control Framework (OZP)

Figure 8.2

Landscape Resources

Figure 8.3

Landscape Resources Photos

Figure 8.4

Landscape Character Areas

Figure 8.5a

Landscape Character Areas Photos (Sheet 1 of 2)

Figure 8.5b

Landscape Character Areas Photos (Sheet 2 of 2)

Figure 8.6

Visual Envelope and Visually Sensitive Receivers

Figure 8.7

Landscape and Visual Mitigation Plan

Figure 8.8

General Arrangement of New Exit Road Sections

Figure 8.9

Photomontage Viewpoint Location

Figure 8.10

Photomontage P1

Figure 8.11

Photomontage P2

Figure 8.12

Photomontage P3

Figure 8.13

Photomontage P4

Figure 8.14

Photomontage P5

Figure 8.15

Photomontage P6

Figure 8.16

Photomontage P7

 

 

List of Appendices

 

Appendix 2.1

Tentative Master Construction Programme

Appendix 3.1

Traffic Forecast for Air Quality Assessment

Appendix 3.2

EMFAC-HK Model Assumptions

Appendix 3.3

Summary of Vehicular Emission Factors of 16 Vehicle Classes

Appendix 3.4

Summary of Composite Vehicular Emission Factors for CALINE4 Model

Appendix 3.5

Detailed Calculation of Emissions from Portals, Underpass Top Openings, Ventilation Building and Ventilation Exhausts

Appendix 3.6

Detailed Calculation of Emissions Associated with Bus, Minibus and Coach Terminuses

Appendix 3.7

Detailed Calculation of Marine Emission

Appendix 3.8

Detailed Emission Removal for PATH Re-run

Appendix 3.9

Determination of Surface Characteristics Parameters for AERMET

Appendix 3.10

Detailed Assessment Results

Appendix 3.11

Comparison between Revised Austin Road Flyover Scenario and Original Austin Road Flyover Scenario

Appendix 4.1

Agreement and Confirmation Letters from Relevant Government Departments and Authorities

Appendix 4.2

Photographs of the Existing Representative Noise Sensitive Receivers

Appendix 4.3

Construction Programme

Appendix 4.4

Construction Plant Inventory (Unmitigated Scenario)

Appendix 4.5

2040 Peak Hour Traffic Forecast

Appendix 4.6

Construction Noise Calculation (Unmitigated Scenario)

Appendix 4.7

Cumulative Construction Noise Calculation (Unmitigated Scenario)

Appendix 4.8

Detailed Results of Road Traffic Noise Assessment (Unmitigated Scenario)

Appendix 4.9

Layout of Road Plots

Appendix 7.1

Relevant Historical Aerial Photographs

Appendix 7.2

Extract of Geotechnical Appraisal Report for Ground Investigation

Appendix 7.3

Acquisition of Information from Government Departments

Appendix 7.4.1

Site Walkover Checklist (Assessment Area except Yau Ma Tei

Public Cargo Working Area)

Appendix 7.4.2

Site Walkover Checklist (Yau Ma Tei Public Cargo Working Area)

Appendix 8.1

Broad Brush Tree Survey Findings and Tree Group Schedule

Appendix 9.1

Implementation Schedule of Recommended Mitigation Measures

Appendix 11.1

Summary of Environmental Impacts

Appendix 11.2

Key Assessment Assumptions, Limitations of Assessment Methodologies and Prior Agreements with the Director