TABLE OF CONTENTS
1. INTRODUCTION
Project Background
Objectives of the EIA Study
The Approach
Report Structure
Introduction
Consideration on Alternative Road Alignment
Consideration on Design and Construction Method
The EIA Assessment area
Construction Activities
Traffic Forecasts
Concurrent Projects
Environmental Conditions in the Absence of The Project
3. NOISE IMPACT
Introduction
Environmental Legislation, Standards and Guidelines
Assessment Methodology and Uncertainties
Description of the Environment
Noise Sensitive Receivers
Identification of Environmental Impact
Evaluation of Impacts
Mitigation of Adverse Environmental Impacts
Evaluation of Residual Impacts
Construction Activities during Restricted Hours
Environmental Monitoring and Audit
Conclusion
Introduction
Environmental Legislation, Standards and Guidelines
Description of the Environment
Air Sensitive Receivers
Assessment Methodology
Environmental Impact Identification, Prediction and Evaluation
Mitigation of Adverse Environmental Impacts
Evaluation of Residual Impacts
Environmental Monitoring and Audit
Conclusion
Introduction
Environmental Legislation, Standards and Guidelines
Baseline Conditions
Water Sensitive Receivers
Assessment Methodology & Criteria
Identification of Environmental Impacts
Evaluation of Impacts
Mitigation Measures
Residual Environmental Impact
Environmental Monitoring and Audit Requirements
Conclusion
Introduction
Environmental Legislation, Policies, Plans, Standards and Criteria
Assessment Methodology
Baseline Conditions
Identification of Potential Sources of Impact
Mitigation Measures
Evaluation of Residual Impacts
Environmental Audit
Fill Requirements
Conclusion
7. TERRESTRIAL AND MARINE ECOLOGICAL IMPACTS
Introduction
Environmental Legislation, Standards and Guidelines
Terrestrial Ecological Impact
Assessment Methodology
Baseline Conditions
Ecological Value
Environmental Impact Identification, Prediction and Evaluation
Mitigation of Adverse Environmental Impacts
Evaluation of Residual Impacts
Environmental Monitoring and Audit
Conclusions
Marine Ecological Impact
Assessment Methodology
Baseline Conditions
Ecological Value
Identification of Ecological Impacts
Assessment of Ecological Impacts
Mitigation of Marine Ecological Impacts
Residual Marine Ecological Impacts
Ecological Monitoring and Audit (EM&A) Requirement
Conclusions
References
Introduction
Environmental Legislation, Standards and Guidelines
Assessment Methodology
Description of the Environment
Fisheries Importance
Mitigation of Adverse Environmental Impacts
Evaluation of Residual Impacts
Environmental Monitoring and Audit
Conclusions
References
9. IMPACT ON CULTURAL HERITAGE
Introduction
Environmental Legislation
Assessment Methodology
Description of the Environment
Identification of Potential Impacts
Assessment of Cultural Heritage Impacts
Mitigation of Cultural Heritage Impacts
Conclusion
Reference
10. LANDSCAPE AND VISUAL IMPACT
Introduction
Environmental Legislation, Standards and Guidelines
Assessment Methodology
Project Description and Existing Conditions
Baseline Study
Review of Planning and Development Control
Landscape and Visual Assessment during Construction Stage
Landscape and Visual Assessment during Operation Stage
Recommended Mitigation Measures
Residual Impacts
Acceptability of the Proposed Project
Environmental Monitoring and Audit
Summary and Conclusion
11. ENVIRONMENTAL MONITORING AND AUDIT
Introduction
Noise Impact
Air Quality Impact
Water Quality Impact
Waste Management Implications
Ecological Impact
Fisheries Impact
Impact on Cultural Heritage
Landscape and Visual Impact
12. CONCLUSIONS AND SUMMARY OF ENVIRONMENTAL OUTCOME
Introduction
Noise Impact
Air Quality Impact
Water Quality Impact
Waste Management Implications
Terrestrial and Marine Ecological Impact
Fisheries
Impact on Cultural Heritage
Landscape and Visual Impact
Overall Conclusion
13. IMPLEMENTATION SCHEDULE AND RECOMMENDED MITIGATION MEASURES
List of Tables
Table 3.1 Construction Noise Criteria for Activity other than Percussive Piling
Table 3.2 Summary of Unmitigated Construction Noise Levels During Normal Daytime Working Hours
Table 3.3 Predicted Traffic Noise Levels for the Normal and Emergency Scenarios
Table 3.4 Summary of Mitigated Construction Noise Levels During Non-restricted Hours
Table 3.5 Construction Noise Levels at Representative NSRs during Restricted Hours (Unmitigated)
Table 4.1 Hong Kong Air Quality Objectives
Table 4.2 Air Pollutant Levels Recorded at EPD’s Air Quality Monitoring Station in Tung Chung
Table 4.3 Description of Representative ASRs
Table 4.4 Comparison of Traffic Emission for Different Scenario Year
Table 4.5 Separation Distances Between the Proposed Work Site Boundaries and Representative ASRs
Table 4.6 Predicted NO2 and RSP Concentration at Representative ASRs
Table 5.1 Summary of Water Quality Objectives for the North Western WCZ
Table 5.2 Summary Statistics of Marine Water Quality in the North Western WCZ at Station NM1
Table 5.3 Ambient and Tolerance Values for Suspended Sediment Concentrations in the Vicinity of Water Sensitive Receivers
Table 5.4 Calculated Suspended Sediment (SS) Concentrations from Dredging
Table 6.1 Sediment Quality Criteria for the Classification of Sediment
Table 6.2 Test Species for Biological Testing
Table 6.3 Test endpoints and decision criteria for biological testing
Table 6.4 Contaminant Levels of Vibrocore Samples and Their Categories
Table 6.5 Summary of Waste Handling Procedures and Disposal Routes
Table 6.6 Summary of Fill Requirements and Potential Sources
Table 7.1a Ecological Value of Grassland/Shrubland Mosaic and Tall Shrubland in the Assessment area
Table 7.1b Ecological Value of Secondary Woodland and Wasteland in the Assessment area
Table 7.1c Ecological Value of Village/Orchard and Plantation in the Assessment Area
Table 7.1d Ecological Value of Backshore Vegetation and Brackish Wetland in the Assessment Area
Table 7.2a Evaluation of Floral Species of Conservation Interest Recorded Within Assessment Area
Table 7.2b Evaluation of Faunal Species of Conservation Interest Recorded Within Assessment Area
Table 7.3a Overall Impact Evaluation of Grassland/shrubland mosaic, tall shrubland, secondary woodland, village/orchard and backshore vegetation
Table 7.3b Overall Impact Evaluation of Wasteland and Plantation
Table 7.4 Mean density (number of animals per m2) and percentage cover (%) of intertidal flora and fauna at Sunny Bay artificial seawall surveyed in dry and wet seasons
Table 7.5 Mean density (number of animals per m2) and percentage cover (%) of intertidal flora and fauna on the natural rocky shore at Cheung Sok Island, Sunny Bay, in dry and wet seasons
Table 7.6 Vegetation Survey Results of Mangrove Area at Sunny Bay
Table 7.7 Benthos in 5 replicate sediment grabs from Sunny Bay.
Table 7.8a Ecological Value of artificial seawall and rocky shore within the Assessment Area
Table 7.8b Ecological Value of sandy shore and mangrove in the Assessment Area
Table 7.8c Ecological Value of Mudflat and Subtidal Benthos within the Assessment Area
Table 7.8d Ecological Value of Marine Mammal Habitat within the Assessment area
Table 7.9a Evaluation of Floral Species of Conservation Interest within Assessment Area
Table 7.9b Evaluation of Faunal Species of Conservation Interest within Assessment Area
Table 7.10a Overall Impact Evaluation for Artificial Seawall
Table 7.10b Overall Impact Evaluation for Subtidal benthos
Table 7.10c Overall Impact Evaluation for Mudflat
Table 7.10d Overall Impact Evaluation for Marine Mammal Habitat
Table 10.1 Assessment Matrix for Landscape Impact (Positive or Negative)
Table 10.2 Assessment Matrix for Visual Impact (Positive or Negative)
Table 10.3 Landscape Character Units
Table 10.4 Landscape Resources
Table 10.5 Visual Sensitive Receivers
Table 10.6 Summary of Disturbance to Landscape Character Units
Table 10.7 Summary of Disturbance to Landscape Resources
Table 10.8 Summary of Landscape Impacts (without mitigation measures)
Table 10.9 Summary of Visual Impacts (without mitigation measures)
Table 10.10 Summary Landscape Mitigation Measures Programming, Funding, Implementation, Management and Maintenance Agents
Table 10.11 Summary of Residual Landscape Impact with recommended mitigation measure
Table 10.12 Summary of Residual Visual Impact with recommended mitigation measure
Table 12.1 Summary of Key Environmental Outcomes / Benefits
Table 13.1 Project Implementation Schedule
List of Figures
Figure 1.1 Location of the Project Site
Figure 2.1 General Layout of the Recommended Option
Figure 2.2 Vertical Profile of Slip Road 5
Figure 2.3 Vertical Profile of Slip Road 6
Figure 2.4 Vertical Profile of Road A
Figure 2.5 General Layout of Alternative Alignment – Option 1
Figure 2.6 General Layout of Alternative Alignment – Option 2
Figure 3.1 Locations of Representative Noise Sensitive Receivers
Figure 4.1 Locations of Representative Air Sensitive Receivers
Figure 4.2 Contours of 1-hour Average NO2 concentration in mg/m3 at 1.5m above ground (Normal Scenario)
Figure 4.3 Contours of 24-hour Average NO2 concentration in mg/m3 at 1.5m above ground (Normal Scenario)
Figure 4.4 Contours of 24-hour Average RSP concentration in mg/m3 at 1.5m above ground (Normal Scenario)
Figure 5.1 Locations of EPD Marine Water Quality Monitoring Station
Figure 5.2 Locations of Water Quality Sensitive Receivers
Figure 5.3 Proposed Locations of Stormwater Discharges
Figure 5.4 Typical Plan Configuration of Slit Curtain Arrangement
Figure 5.5 Typical Sectional Configuration of Silt Curtain Arrangement
Figure 6.1 Sediment Sampling Locations
Figure 7.1 Habitat Map
Figure 7.2 Representative Photographs of Marine Habitats and Notable Species
Figure 7.3 Summary of Dolphins Sighting from 1995 to 2004 (Data with AFCD Permission)
Figure 9.1 Archaeological Sites and Study Area of Marine Geophysical Survey
Figure 10.1 Aerial View of the Existing Site Condition
Figure 10.2 Impact Upon Alternative Alignment – Recommended Option
Figure 10.3 Impact Upon Alternative Alignment – Option 1
Figure 10.4 Impact Upon Alternative Alignment – Option 2
Figure 10.5 Aerial View of Proposed Project
Figure 10.6 View East from North Lantau Highway
Figure 10.7 View West from North Lantau Highway
Figure 10.8 View North from Existing Link Road 1
Figure 10.9 View South from Existing Sunny Bay
Figure 10.10 View South from Existing Sunny Bay (Day 1, Year 5 and Year 10 with mitigation measures)
Figure 10.11 Landscape Impact Assessment Area
Figure 10.12 Visual Envelope
Figure 10.13 Landscape Character Units (LCUs)
Figure 10.14 Landscape Resources
Figure 10.15 Photos Taken at Selected Landscape Character Units
Figure 10.16 Location of Visually Sensitive Receivers (VSRs)
Figure 10.17 Selected View Points
Figure 10.18 Landscape Impact
Figure 10.19 Visual Impact
Figure 10.20 Landscape Layout Plan
Figure 10.21 Landscape Sectional View
Figure 10.22 North-east Lantau Outline Development Plan D/I-NEL/1
Figure 10.23 View West from Sunny Bay Station (Day 1, Year 5 and Year 10 with mitigation)
Appendices
Appendix 2.1 Preliminary Construction Programme
Appendix 2.2 Traffic Forecast for Years 2008 and 2023 (Normal and Emergency Scenarios)
Appendix 3.1 Extent of Defined ‘New Roads’ and ‘Existing Roads’
Appendix 3.2 Proposed Construction Plant Inventory and their Respective Sound Power Levels for Various Construction Activities (Unmitigated Scenario)
Appendix 3.3 Sample Output File for Traffic Noise Model Calculation
Appendix 3.4 Construction Noise Impact Assessment (Unmitigated Scenario)
Appendix 3.5 Proposed Construction Plant Inventory and their Respective Sound Power Levels for Various Construction Activities (Mitigated Scenario)
Appendix 3.6 Construction Noise Impact Assessment (Mitigated Scenario)
Appendix 3.7 Proposed Construction Plant Inventory and their Respective Sound Power Levels for Dredging at Sunny Bay during Evening Time (Unmitigated Scenario)
Appendix 3.8 Construction Noise Impact Assessment for Dredging at Sunny Bay during Evening Time (Unmitigated Scenario)
Appendix 4.1 Detailed Calculation of Total NOx Emission of North Lantau Highway in Years 2008 and 2023
Appendix 4.2 Detailed Calculation of Vehicle Emission Factors in Year 2023 (Normal and Emergency Scenarios)
Appendix 4.3 Sample Calculation Output of CALINE4 Model
Appendix 7.1 Photographs of Habitats Recorded in the Assessment Area
Appendix 7.2 Species of Conservation Interest Recorded in the Assessment Area
Appendix 7.3 Vegetation Recorded in the Assessment Area
Appendix 7.4 Terrestrial Fauna Recorded in the Assessment Area