路政署

Highways Development

WIDENING OF YUEN LONG HIGHWAY

(SECTION BETWEEN LAM TEI AND

TONG YAN SAN TSUEN)

Environmental Impact Assessment Report

November 2023

Reviewed:	Fredrick LEONG MPhil MHKIE FCIWEM C.WEM CSci CEnv	17 November 2023

Approved for Issue:	Alex LI MHKIE MICE	17 November 2023

AECOM ASIA COMPANY LIMITED

Disclaimer:

This report is prepared for Highways Department (HyD) and is given for its sole benefit in relation to and pursuant to Agreement No. CE 17/2022 (HY) Widening of Yuen Long Highway (Section between Lam Tei Quarry and Tong Yan San Tsuen Interchange) – Investigation, Design and Construction and may not be disclosed to, quoted to or relied upon by any person other than HyD without our prior written consent. No person (other than HyD) into whose possession a copy of this report comes may rely on this report without our express written consent and HyD may not rely on it for any purpose other than as described above.

TABLE OF CONTENTS

1. introduction

1.1 Project Background

1.2 Designated Projects under EIAO

1.3 Purpose of the EIA Study

1.4 Objectives of this EIA Study

1.5 Structure of the EIA Report

2. project description

2.1 Purposes and Objectives of the Project

2.2 Project Site Location and Site History

2.3 Need of the Project

2.4 Proposed Project Design

2.5 Scenarios “With” and “Without” the Project

2.6 Consideration of Different Widening Options

2.7 Consideration of Alternative Construction Methods and Sequences of Works

2.8 Construction Programme

2.9 Concurrent Projects

2.10 Public Consultation

2.11 Reference Environmental Permits

3. Air Quality

3.1 Introduction

3.2 Environmental Legislations, Standards, and Criteria

3.3 Description of the Environment

3.4 Identification of Air Sensitive Receivers

3.5 Identification of Environmental Impacts

3.6 Assessment Methodology

3.7 Prediction and Evaluation of Environmental Impacts

3.8 Mitigation of Adverse Environmental Impacts

3.9 Evaluation of Residual Impact

3.10 Environmental Monitoring and Auditing

3.11 Conclusion

4. Noise

4.1 Introduction

4.2 Environmental Legislations, Standards, and Criteria

4.3 Description of the Environment

4.4 Noise Sensitive Receivers

4.5 Identification of Environmental Impacts

4.6 Assessment Methodology

4.7 Prediction and Evaluation of Environmental Impacts

4.8 Mitigation of Environmental Impacts

4.9 Evaluation of Residual Impact

4.10 Environmental Monitoring and Auditing

4.11 Conclusion

5 Water Quality Impact Assessment Methodology

5.1 Introduction

5.2 Environmental Legislation, Standards, and Criteria

5.3 Assessment Methodology for Construction Phase

5.4 Assessment Methodology for Operation Phase

5.5 Baseline Conditions

5.6 Water Sensitive Receivers

5.7 Identification of Water Quality Impact

5.8 Mitigation Measures

5.9 Residual Impact

5.10 Monitoring and Environmental Management

5.11 Conclusion

6. Waste Management Implications Assessment

6.1 Background

6.2 Environmental Legislations, Standards, and Criteria

6.3 Assessment Methodology

6.4 Identification of Waste Sources during Construction Phase

6.5 Analysis of Activities and Waste Generation

6.6 Proposal for Waste Management

6.7 Transportation Arrangement for Waste Disposal during Construction Phase

6.8 Construction Phase Waste Summary

6.9 Identification of Waste Sources during Operation Phase

6.10 Mitigation Measures for construction phase

6.11 Mitigation Measures for operational phase

6.12 Residual Waste Management Implications

6.13 Environmental Monitoring and Audit

6.14 Conclusion and Recommendations

7. LAND CONTAMINATION IMPACT

7.1 Introduction

7.2 Relevant Legislations, Standards & Guidelines

7.3 Assessment Methodology

7.4 Review of EIA reports

7.5 Description of the Environment

7.6 Information Request from Government Departments

7.7 Site Walkover

7.8 Identification of Potentially Contaminated Sites

7.9 Site Investigation Plan

7.10 Evaluation of Land Contamination Impacts

7.11 Submission Requirement of CAR, RAP and RR

7.12 Environmental Acceptability of Schedule 2 Designated Projects

7.13 Conclusion and Recommendation

8. Ecology

8.1 Introduction

8.2 Environmental Legislation and Standards

8.3 Assessment Methodology

8.4 Baseline Conditions

8.5 Evaluation of Habitats

8.6 Potential Ecological Impact

8.7 Proposed Mitigation Measures

8.8 Residual Impact

8.9 Environemnteal Monitoring and Audit

8.10 Conclusion

9. Landscape and visual IMPACT assessment

9.1 General

9.2 Environmental Legislation, Standards and Criteria

9.3 Assessment Methodology

9.4 Review of Planning and Development Control Framework

9.5 Baseline Study of Landscape Condition

9.6 Baseline Study of Visual Conditions

9.7 Landscape and Visual Impact Assessment

9.8 Mitigation Measures

9.9 Residual Impacts

9.10 Cumulative Impacts

9.11 Environmental Monitoring and Audit (EM&A)

9.12 Summary

10 Cultural Heritage Impact

10.1 Introduction

10.2 Environmental Legislation, Standards, and Guidelines

10.3 Baseline Conditions

10.4 Assessment Methodology

10.5 Impact Assessment

10.6 Mitigation Measures

10.7 Evaluation of Residual Impact and Cumulative Impact

10.8 Environmental Monitoring and Audit

10.9 Conclusions and Recommendations

10.10 Bibliography

11. ENVIRONMENTAL MONITORING AND AUDITING

11.1 Introduction

11.2 Air Quality Impact

11.3 Noise Impact

11.4 Water Quality Impact

11.5 Waste Management Implications

11.6 Land Contamination

11.7 Ecological Impact (Terrestrial)

11.8 Landscape and Visual Impact

11.9 Impact on Cultural Heritage

12. SUMMARY OF ENVIRONMENTAL OUTCOMES

12.1 Overview

12.2 Environmental Benefits of the Project

12.3 Incorporation of Environmentally Friendly Options

12.4 Environmental Design Recommended

12.5 Key Environmental Problems Avoided and Environmentally Sensitive Areas Protected

12.6 Key Assessment Assumptions. Limitation of Assessment Methodologies and related Prior Agreement(s) with the Director

12.7 Estimation of Population Protected

12.8 Conclusion of Environmental Impacts

13. CONCLUSION

13.1 Introduction

13.2 Conclusion of Environmental Impacts

13.3 Conclusion

Figures

Figure 2.1	Location Plan of the Project
Figure 2.2	Scheme 1, 2 & 3
Figure 2.3	Recommended Road Scheme
Figure 2.4	Locations of Potential Concurrent Projects
Figure 3.1	Air Quality Impact Assessment Area
Figure 3.2	Representative Air Sensitive Receivers
Figure 3.3	Extent of Works
Figure 3.4	Locations of Potential Concurrent Projects
Figure 3.5	Locations of Underpasses, Noise Barriers, Semi-Enclosures, and Full Enclosures
Figure 3.5a	Locations of Underpasses, Noise Barriers, Semi-Enclosures, and Full Enclosures
Figure 3.5b	Locations of Underpasses, Noise Barriers, Semi-Enclosures, and Full Enclosures
Figure 3.5c	Locations of Underpasses, Noise Barriers, Semi-Enclosures, and Full Enclosures
Figure 3.6	Locations of Portal Emissions
Figure 3.6a	Locations of Portal Emissions
Figure 3.6b	Locations of Portal Emissions
Figure 3.7	Locations of Industrial Emissions
Figure 3.8	Locations of Emissions Associated with Bus and Minibus Termini, and Heavy Goods Vehicles and Coach Parking Sites
Figure 3.9	Contour Plot of 19th Highest Cumulative Hourly NO2 Concentration (µg/m3) at 1.5 mAG during Interim Phase
Figure 3.10	Contour Plot of Cumulative Annual Averaged NO2 Concentration (µg/m3) at 1.5 mAG during Interim Phase
Figure 3.11	Contour Plot of 10th Highest Cumulative Daily RSP Concentration (µg/m3) at 1.5 mAG during Interim Phase
Figure 3.12	Contour Plot of Cumulative Annual Averaged RSP Concentration (µg/m3) at 1.5 mAG during Interim Phase
Figure 3.13	Contour Plot of 19th Highest Cumulative Daily FSP Concentration (µg/m3) at 1.5 mAG during Interim Phase
Figure 3.14	Contour Plot of Cumulative Annual Averaged FSP Concentration (µg/m3) at 1.5 mAG during Interim Phase
Figure 3.15	Contour Plot of Cumulative Annual Averaged NO2 Concentration (µg/m3) at 5 mAG during Interim Phase
Figure 3.16	Contour Plot of Cumulative Annual Averaged NO2 Concentration (µg/m3) at 10 mAG during Interim Phase
Figure 3.17	Contour Plot of 19th Highest Cumulative Hourly NO2 Concentration (µg/m3) at 1.5 mAG during Operation Phase
Figure 3.18	Contour Plot of Cumulative Annual Averaged NO2 Concentration (µg/m3) at 1.5 mAG during Operation Phase
Figure 3.19	Contour Plot of 10th Highest Cumulative Daily RSP Concentration (µg/m3) at 1.5 mAG during Operation Phase
Figure 3.20	Contour Plot of Cumulative Annual Averaged RSP Concentration (µg/m3) at 1.5 mAG during Operation Phase
Figure 3.21	Contour Plot of 19th Highest Cumulative Daily FSP Concentration (µg/m3) at 1.5 mAG during Operation Phase
Figure 3.22	Contour Plot of Cumulative Annual Averaged FSP Concentration (µg/m3) at 1.5 mAG during Operation Phase
Figure 3.23	Contour Plot of Cumulative Annual Averaged NO2 Concentration (µg/m3) at 5 mAG during Operation Phase
Figure 3.24	Contour Plot of 10th Highest Cumulative Daily RSP Concentration (µg/m3) at 5 mAG during Operation Phase
Figure 3.25	Contour Plot of Cumulative Annual Averaged RSP Concentration (µg/m3) at 5 mAG during Operation Phase
Figure 3.26	Contour Plot of Cumulative Annual Averaged NO2 Concentration (µg/m3) at 10 mAG during Operation Phase
Figure 4.1	Noise Impact Assessment Area
Figure 4.2	Locations of Representative Noise Sensitive Receivers and Noise Assessment Points (Construction Phase)
Figure 4.3	Locations of Representative Noise Sensitive Receivers and Noise Assessment Points (Operation Phase)
Figure 4.4	Locations of Potential Concurrent Projects
Figure 4.5	Extent of Project Roads and Existing Roads
Figure 4.6	Locations of Existing and Committed Noise Mitigation Measures
Figure 4.7	Extent of Road Sections with HMFC
Figure 4.8	Locations of Proposed Traffic Noise Mitigation Measures
Figure 4.8a	Locations of Proposed Traffic Noise Mitigation Measures
Figure 4.8b	Locations of Proposed Traffic Noise Mitigation Measures
Figure 4.9	Cross Sections of Proposed Traffic Noise Mitigation Measures
Figure 4.10	Locations of Existing Noise Barriers to be Reprovisioned
Figure 5.1	Water Quality Sensitive Receiver
Figure 7.1	Land Contamination Assessment Area
Figure 8.1	Recognised Site of Conservation Importance within 500m Assessment Area
Figure 8.2	Survey Transects and Aquatic Sampling Locations
Figure 8.3	Habitat Map and Species of Conservation Importance recorded within 500m Assessment Area
Figure 8.4	Species of Conservation Importance Recorded from Literature Review
Figure 9.1	Project Layout Plan
Figure 9.2.1	Review of Planning and Development Control Framework
Figure 9.2.2	Review of Planning and Development Control Framework
Figure 9.2.3	Review of Planning and Development Control Framework
Figure 9.2.4	Review of Planning and Development Control Framework
Figure 9.2.5	Review of Planning and Development Control Framework
Figure 9.2.6	Review of Planning and Development Control Framework
Figure 9.3.1	Landscape Resources (LRs)
Figure 9.3.2	Landscape Resources (LRs)
Figure 9.3.3	Landscape Resources (LRs)
Figure 9.3.4	Landscape Resources (LRs)
Figure 9.3.5	Landscape Resources (LRs)
Figure 9.3.6	Landscape Resources (LRs)
Figure 9.4.1	Photographs of Landscape Resources
Figure 9.4.2	Photographs of Landscape Resources
Figure 9.4.3	Photographs of Landscape Resources
Figure 9.4.4	Photographs of Landscape Resources
Figure 9.5.1	Landscape Character Areas (LCAs)
Figure 9.5.2	Landscape Character Areas (LCAs)
Figure 9.5.3	Landscape Character Areas (LCAs)
Figure 9.5.4	Landscape Character Areas (LCAs)
Figure 9.5.5	Landscape Character Areas (LCAs)
Figure 9.5.6	Landscape Character Areas (LCAs)
Figure 9.6	Photographs of Landscape Character Areas
Figure 9.7.1	Visual Envelope
Figure 9.7.2	Visual Envelope
Figure 9.7.3	Visual Envelope
Figure 9.7.4	Visual Envelope
Figure 9.7.5	Visual Envelope
Figure 9.7.6	Visual Envelope
Figure 9.7.7	Visual Envelope
Figure 9.7.8	Visual Envelope
Figure 9.7.9	Visual Envelope
Figure 9.7.10	Visual Envelope
Figure 9.8.1	Visual Envelope for Future VSRs
Figure 9.8.2	Visual Envelope for Future VSRs
Figure 9.8.3	Visual Envelope for Future VSRs
Figure 9.8.4	Visual Envelope for Future VSRs
Figure 9.8.5	Visual Envelope for Future VSRs
Figure 9.9.1	Photomontage VP1
Figure 9.9.2	Photomontage VP2
Figure 9.9.3	Photomontage VP3
Figure 9.9.4	Photomontage VP4
Figure 9.9.5	Photomontage VP5
Figure 9.9.6	Photomontage VP6
Figure 9.9.7	Photomontage VP7
Figure 9.9.8	Photomontage VP8
Figure 9.10.1	Landscape and Visual Mitigation Plan
Figure 9.10.2	Landscape and Visual Mitigation Plan
Figure 9.10.3	Landscape and Visual Mitigation Plan
Figure 9.10.4	Landscape and Visual Mitigation Plan
Figure 9.11	Locations of Potential Concurrent Projects
Figure 10.1	Areas of Archaeology and Built Heritage
Figure 10.2	Grave location Map (Sheet 1 of 4)
Figure 10.3	Grave location Map (Sheet 2 of 4)
Figure 10.4	Grave location Map (Sheet 3 of 4)
Figure 10.5	Grave location Map (Sheet 4 of 4)

Appendices

Appendix 3.1	Tentative Construction Programme
Appendix 3.2	Traffic Forecast for Air Quality Impact Assessment
Appendix 3.3	EMFAC-HK Model Assumptions
Appendix 3.4	Summary of Vehicular Emission Factors of 18 Vehicle Classes
Appendix 3.5	Summary of Composite Vehicular Emission Factors for CALINE4 Model
Appendix 3.6	Determination of Surface Characteristics Parameters for AERMET
Appendix 3.7	Emission Inventory for Portal Emissions
Appendix 3.8	Emission Inventory for Industrial Emissions
Appendix 3.9	Emission Inventory for Emissions Associated with Bus and Minibus Termini, and Heavy Goods Vehicles and Coach Parking Sites
Appendix 3.10	Derivation of Cumulative Annual Average NOx to NO₂ Conversion Equation using Jenkin Method
Appendix 3.11	Detailed Operation Phase Assessment Results
Appendix 4.1	Photographs of Existing Representative Noise Sensitive Receivers
Appendix 4.2	Construction Plant Inventory (Unmitigated Scenario)
Appendix 4.3	Year 2028 and 2048 Peak Hour Traffic Forecast
Appendix 4.4	Detailed Results of Road Traffic Noise Assessment (Unmitigated Scenario)
Appendix 4.5	Construction Plant Inventory (Mitigated Scenario)
Appendix 4.6	Typical Configuration of Noise Barrier and Portable Noise Enclosure
Appendix 4.7	Detailed Results of Road Traffic Noise Assessment (Mitigated Scenario)
Appendix 4.8	Eligibility Assessment for Indirect Technical Remedies
Appendix 7.1	Contamination Assessment Plan
Appendix 8.1	Flora Species recorded within Project Site and AA and the Relative Abundance
Appendix 8.2	Fauna Species Recorded within Application Site and AA and the Conservation Status
Appendix 8.3	Representative Photographs of Habitats within the Project Site and AA
Appendix 8.4	Representative Photographs of Species of Conservation Importance Recorded
Appendix 9.1	Broad-brush Tree Survey Report
Appendix 9.2	Description of Landscape Character Areas (LCAs) and Existing Plantation
Appendix 10.1	Built Heritage Recording Sheet
Appendix 10.2	Aerial Photo
Appendix 11.1	Implementation Schedule of Recommended Mitigation Measures
Appendix 12.1	Key Assessment Assumptions, Limitation of Assessment Methodologies and related Agreement(s) with the Director