(HY) Cross Bay Link, Tseung Kwan O - Investigation Environmental Impact Assessment Report
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Civil Engineering and Development Department Agreement No. CE 43/2008 (HY) Cross Bay Link, Tseung Kwan O - Investigation Environmental Impact Assessment Report 209506-REP-112-03 Final Issue | January 2013 This report takes into account the particular Ove Arup & Partners Hong Kong Ltd instructions and requirements of our client. Level 5 Festival Walk It is not intended for and should not be relied 80 Tat Chee Avenue upon by any third party and no responsibility is Kowloon Tong undertaken to any third party. Kowloon Hong Kong www.arup.com Job number 209506 Agreement No. CE 43/2008 (HY) Environmental Impact Assessment Report Cross Bay Link, Tseung Kwan O - Investigation Contents Page 1 Introduction 1-1 1.1 General 1-1 1.2 Background Information & Previous Studies 1-1 1.3 Project Description 1-2 1.4 EIA Study Brief 1-3 1.5 Need of the Project 1-5 1.6 Implementation Programme 1-11 1.7 Concurrent Projects – Construction Phase 1-11 1.8 Concurrent Projects – Operational Phase 1-17 1.9 Summary 1-17 1.10 Structure of EIA Report 1-18 2 Scope of Environmental Impact Assessment Study 2-1 2.1 Cross Bay Link (CBL) 2-1 3 Alternative Options 3-1 3.1 General 3-1 3.2 Cross Bay Link Alignment Options Considered 3-2 3.3 Bridge Design Options 3-5 3.4 Consideration of Alternative Construction Methods and Sequences of Works 3-7 3.5 Preferred Construction Methods 3-9 4 Construction Descriptions 4-1 4.1 General 4-1 4.2 Construction Methodology for Cross Bay Link 4-1 4.3 Construction Methodology for Road D9 4-4 4.4 Tentative Programme 4-4 4.5 Plant Inventory 4-4 5 Air Quality Impact 5-1 5.1 Legislation and Standards 5-1 5.2 Description of Existing Environment 5-2 5.3 Air Sensitive Receivers & Pollution Sources 5-3 5.4 Potential Concurrent Projects / Sources 5-6 5.5 Construction Dust Assessment 5-8 5.6 Operational Air Quality Assessment 5-23 5.7 Residual Environmental Impacts 5-40 5.8 Conclusion 5-40 209506-REP-112-03 | Final issue | January 2013 FINAL EIA REPORT_TOC.DOCX Page i Agreement No. CE 43/2008 (HY) Environmental Impact Assessment Report Cross Bay Link, Tseung Kwan O - Investigation 6 Noise Impact 6-1 6.1 Legislation and Standards 6-1 6.2 Description of Existing Environment 6-4 6.3 Noise Sensitive Receivers & Pollution Sources 6-5 6.4 Potential Concurrent Projects 6-9 6.5 Assessment Methodology 6-11 6.6 Construction Noise Assessment 6-12 6.7 Road Traffic Noise Assessment 6-27 6.8 Assessment of Side Effects and Constraints 6-33 6.9 Evaluation of Constraints on Planned Noise Sensitive Developments/Land Uses 6-33 6.10 Residual Environmental Impacts 6-33 6.11 Conclusion 6-33 7 Sediment Quality Impact 7-1 7.1 Legislation and Standards 7-1 7.2 Methodology for Sediment Quality Assessment 7-2 7.3 Review of Previous Sediment Quality Data 7-5 7.4 Sample Collection and Laboratory Analysis 7-7 7.5 Sediment Quality and Classification 7-13 7.6 Classification of Sediment 7-35 7.7 Conclusion 7-41 8 Water Quality 8-1 8.1 Legislation and Standards 8-1 8.2 Description of Existing Environment 8-6 8.3 Water Quality Sensitive Receivers & Pollution Sources 8-11 8.4 Potential Concurrent Projects 8-15 8.5 Assessment Methodology 8-16 8.6 Construction Phase Assessment 8-31 8.7 Operational Phase Assessment 8-45 8.8 Residual Impacts 8-48 8.9 Conclusion 8-48 9 Waste Management Implication 9-1 9.1 Legislation and Standards 9-1 9.2 Legislation and Standards 9-1 9.3 Assessment Methodology 9-5 9.4 Construction Phase – Evaluation of Waste Generation 9-5 9.5 Construction Phase – Recommended Mitigation Measures 9-11 9.6 Operational Phase 9-16 9.7 Residual Environmental Impacts 9-16 9.8 Conclusion 9-17 209506-REP-112-03 | Final issue | January 2013 FINAL EIA REPORT_TOC.DOCX Page ii Agreement No. CE 43/2008 (HY) Environmental Impact Assessment Report Cross Bay Link, Tseung Kwan O - Investigation 10 Marine Ecology Impact 10-1 10.1 Legislation and Standards 10-1 10.2 Methodology for Baseline Establishment 10-3 10.3 Ecological Baseline Conditions 10-10 10.4 Evaluation of Ecological Importance of Habitats and Species 10-16 10.5 Assessment Methodology 10-18 10.6 Impact Identification and Evaluation 10-21 10.7 Mitigations of Adverse Impacts 10-30 10.8 Residual Impacts 10-31 10.9 Monitoring and Audit 10-31 10.10 Conclusion 10-31 10.11 References 10-32 11 Fisheries Impact 11-1 11.1 Legislation and Standards 11-1 11.2 Methodology for Baseline Establishment 11-1 11.3 Fisheries Baseline Conditions 11-3 11.4 Assessment Methodology 11-8 11.5 Impact identification and evaluation 11-11 11.6 Mitigations of Adverse Impacts 11-16 11.7 Residual Impacts 11-17 11.8 Monitoring and Audit 11-18 11.9 Conclusion 11-18 11.10 References 11-18 12 Cultural Heritage Impact 12-1 12.1 Legislation and Standards 12-1 12.2 Legislation and Standards 12-1 12.3 Description of Existing Environment 12-4 12.4 Cultural Heritage Resources 12-4 12.5 Assessment Methodology 12-4 12.6 Construction Phase Assessment 12-7 12.7 Operational Phase Assessment 12-16 12.8 Residual Environmental Impacts 12-16 12.9 Conclusion 12-16 13 Landscape and Visual 13-1 13.2 Legislation, Standards and Guidelines 13-2 13.3 Assessment Methodology 13-3 13.4 Scope and Content of the Study 13-10 13.5 Baseline Study 13-17 13.6 Landscape Impact Assessment 13-42 209506-REP-112-03 | Final issue | January 2013 FINAL EIA REPORT_TOC.DOCX Page iii Agreement No. CE 43/2008 (HY) Environmental Impact Assessment Report Cross Bay Link, Tseung Kwan O - Investigation 13.7 Mitigation Measures 13-46 13.8 Visual Impact Assessment 13-55 13.9 Residual Impacts 13-63 13.10 Conclusion 13-73 14 Landfill Gas Hazard 14-1 14.1 Legislation and Standards 14-1 14.2 Scope of the Assessment 14-2 14.3 Description of Existing Environment 14-2 14.4 Potential Hazards and Properties of Landfill Gas 14-6 14.5 Assessment Methodology 14-7 14.6 Qualitative Risk Assessment 14-11 14.7 Precautionary and Protective Measures 14-20 14.8 Conclusion 14-27 15 Environmental Monitoring and Audit 15-1 15.1 Introduction 15-1 15.2 Project Organization 15-1 15.3 EM&A Manual & Implementation Schedule 15-2 15.4 EM&A Programme 15-3 15.5 Environmental Management Plan 15-3 15.6 Construction Method Statement 15-4 16 Summary of Environmental Outcomes 16-1 16.1 Population and Environmental Sensitive Areas Protected 16-1 16.2 Approaches Adopted to Avoid Environmental Impacts 16-2 16.3 Approaches Adopted to Minimize Environmental Impacts 16-2 16.4 Approaches Adopted to Mitigate Environmental Impacts 16-4 17 Conclusion 17-1 17.1 Alternative Options 17-1 17.2 Construction Descriptions 17-2 17.3 Air Quality Impact 17-2 17.4 Noise Impact 17-3 17.5 Sediment Quality 17-4 17.6 Waste Management 17-4 17.7 Water Quality Impact 17-5 17.8 Marine Ecological Impact 17-5 17.9 Fisheries Impact 17-6 17.10 Cultural Heritage Impact 17-6 17.11 Landfill Gas Hazard 17-7 17.12 Landscape and Visual Impact 17-7 17.13 Environmental Monitoring and Audit Requirement 17-11 209506-REP-112-03 | Final issue | January 2013 FINAL EIA REPORT_TOC.DOCX Page iv Agreement No. CE 43/2008 (HY) Environmental Impact Assessment Report Cross Bay Link, Tseung Kwan O - Investigation Drawings (Volume 2) Drawing No. Description Chapter 1 209506/EIA/IN/001 General Layout Plan Chapter 3 209506/EIA/AO/001 Cross Bay Link Alignment Options 209506/EIA/AO/002 Preferred Alignment Option Chapter 5 209506/EIA/AIR/001 Locations of Air Sensitive Receivers 209506/EIA/AIR/002 Contours of Unmitigated 1-hour TSP Concentrations at 1.5m above Ground (Tier 1) 209506/EIA/AIR/003 Contours of Unmitigated 24-hour TSP Concentrations at 1.5m above Ground (Tier 1) 209506/EIA/AIR/004 Contours of Unmitigated Annual TSP Concentrations at 1.5m above Ground 209506/EIA/AIR/005 Contours of Mitigated 1-hour TSP Concentrations at 1.5m above Ground (Tier 1) 209506/EIA/AIR/006 Contours of Mitigated 24-hour TSP Concentrations at 1.5m above Ground (Tier 1) 209506/EIA/AIR/007 Contours of Mitigated Annual TSP Concentrations at 1.5m above Ground 209506/EIA/AIR/008 Not used 209506/EIA/AIR/009 Not used 209506/EIA/AIR/010 Locations of Open Roads and Chimneys 209506/EIA/AIR/011 Contours of 1-hour NO2 Concentrations at 1.5m above Ground 209506/EIA/AIR/012 Contours of 24-hour NO2 Concentrations at 1.5m above Ground 209506/EIA/AIR/013 Contours of Annual NO2 Concentrations at 1.5m above Ground 209506/EIA/AIR/014 Contours of 24-hour RSP Concentrations at 1.5m above Ground 209506/EIA/AIR/015 Contours of Annual RSP Concentrations at 1.5m above Ground Chapter 6 209506/EIA/IN/001 General Layout Plan and Noise Study Boundary 209506/EIA/NS/001 Locations of NSRs for Noise Assessment 209506/EIA/NS/002 Locations and Extent of Mitigation Measures 209506-REP-112-03 | Final issue | January 2013 FINAL EIA REPORT_TOC.DOCX Page v Agreement No. CE 43/2008 (HY) Environmental Impact Assessment Report Cross Bay Link, Tseung Kwan O - Investigation Drawing No.