TABLE OF CONTENTS

 

1.         INTRODUCTION     

Project Background

Objectives of the EIA Study    

The Approach 

Report Structure          

2.         DESCRIPTION OF THE PROJECT  

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      

4.         AIR QUALITY IMPACT       

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      

5.         WATER QUALITY IMPACT

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      

6.         WASTE MANAGEMENT     

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      

8.         FISHERIES IMPACT

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