1.          INTRODUCTION     

1.1        Background           

1.2        Requirements under the Environmental Impact Assessment Ordinance

1.3        Purpose and Objective of the Environmental Impact Assessment (EIA) Study

1.4        Approach of the EIA Study       

1.5        Structure of the EIA Report     

 

2.          PROJECT DESCRIPTION

2.1        Background           

2.2        Location and Description of the Project          

2.3        Need for the Project

2.4        Consideration of Alternative Options of Water Supply, Water Main Alignments, Landfall Locations and Construction Methods

2.5        Implementation Programme           

2.6        Project Interfaces / Concurrent Projects

2.7        Scope of Works during Operational Phase 

2.8        Continuous Public Involvement            

2.9        Illustrative Materials for Landscaping Measures

 

3.          WATER QUALITY IMPACT ASSESSMENT

3.1        Introduction            

3.2        Environmental Legislation, Policies, Standards and Criteria

3.3        Study Area              

3.4        Baseline Water Quality Conditions of the Study Area         

3.5        Water Sensitive Receivers               

3.6        Potential Impacts during Construction Phase

3.7        Mitigation Measures for Construction Phase Impacts   

3.8        Residual and Cumulative Impacts 

3.9        Monitoring and Audit Requirement         

3.10      Summary

3.11      References            

 

4.          ECOLOGICAL IMPACT ASSESSMENT       

4.1        Introduction            

4.2        Environmental Legislation, Criteria and Guidelines             

4.3        Study Area              

4.4        Ecological Key Issues

4.5        Literature Review  

4.6        Field Survey Scope and Methodology          

4.7        Key Ecological Issues for the EIA Study    

4.8        Results of Literature Review    

4.9        Results of Field Surveys

4.10      Evaluation of Habitats and Species          

4.11      Impact Identification and Evaluation              

4.12      Impact Avoidance and Mitigation Measures

4.13      Residual and Cumulative Ecological Impacts   

4.14      Ecological Monitoring and Audit

4.15      Summary

4.16      References            

 

5.          FISHERIES IMPACT ASSESSMENT       

5.1        Introduction            

5.2        Legislation             

5.3        Study Area              

5.4        Methodologies for Baseline Establishment and Assessment  

5.5        Baseline Conditions

5.6        Sensitive Receivers

5.7        Impact Identification and Evaluation              

5.8        Mitigation of Impacts

5.9        Residual Impacts 

5.10      Environmental Monitoring and Audit 

5.11      Summary

5.12      References            

 

6.          CULTURAL HERITAGE IMPACT ASSESSMENT

6.1        Introduction            

6.2        Environmental Legislation, Standards, Guidelines and Criteria

6.3        Terrestrial Archaeological Investigation (TAI) 

6.4        Marine Archaeological Investigation (MAI)

6.5        Residual Impacts 

6.6        Environmental Monitoring and Audit 

6.7        Summary

6.8        References            

 

7.          CONSTRUCTION WASTE MANAGEMENT      

7.1        Introduction            

7.2        Relevant Legislation, Policies, Standards and Criteria    

7.3        Assessment Methodology

7.4        Sources and Types of Waste arising from the Project     

7.5        Impact Assessment and Evaluation              

7.6        Mitigation Measures

7.7        Evaluation of Residual Impacts   

7.8        Environmental Audit

7.9        Summary

 

8.          CONSTRUCTION NOISE IMPACT ASSESSMENT

8.1        Introduction            

8.2        Noise Criteria        

8.3        Study Area              

8.4        Representative Noise Sensitive Receivers

8.5        Construction Noise Impact Assessment 

8.6        Mitigation Measures

8.7        Residual Impact   

8.8        Cumulative Impact 

8.9        Monitoring and Audit Requirements       

8.10      Summary

 

9.          ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS

9.1        Introduction            

9.2        Background           

9.3        Environmental Management         

9.4        Project Organisation

9.5        Construction Programme

9.6        Water Quality         

9.7        Ecology   

9.8        Fisheries

9.9        Cultural Heritage  

9.10      Waste Management

9.11      Construction Noise 

9.12      Other Information  

 

10.        ENVIRONMENTAL OUTCOMES           

10.1      Justification and Benefits of the Project          

10.2      Population and Environmental Sensitive Areas Protected    

10.3      Environmental Friendly Designs Recommended

10.4      Key Environmental Problems Avoided

10.5      Compensation Areas Included  

10.6      Environmental Benefits of Environmental Protection Measures Recommended

 

11.        CONCLUSION        

11.1      Background           

11.2      Location and Description of the Project          

11.3      Water Main Design 

11.4      Justification and Benefits of the Project          

11.5      Key Environmental Issues

11.6      Water Quality Impact

11.7      Ecological Impact 

11.8      Fisheries Impact   

11.9      Cultural Heritage Impact

11.10   Construction Waste Management         

11.11   Construction Noise Impact

11.12   Environmental Monitoring and Audit (EM&A)    

11.13   Overall Conclusion 

 

 

PLATES

Plate 1  

Rocky shore of Chi Ma Wan, Lantau

Plate 2  

Low headland at Tai Kwai Wan, Cheung Chau

Plate 3  

Cheung Kwai Road and WSD temporary storage area

Plate 4  

WSD temporary area, south of Tai Kwai Wan

Plate 5  

Village vehicle in Cheung Chau

Plate 6  

Adamasta Channel

Plate 7  

Existing exposed land main at Lantau

Plate 8  

Existing exposed land main at Cheung Chau

Plate 9  

Typical Horizontal Directional Drilling Rig

Plate 10

Typical Horizontal Directional Drilling Rig and General Site Arrangement

Plate 11

Typical Drilling Fluid Recycling Unit

Plate 12

Typical Bentonite Pump and General Site Arrangement

 

APPENDICES

Appendix 1          

EIA Study Brief

 

Appendix 2          

Evaluation of Options for Improving the Adequacy and Reliability of the Water Supply to Cheung Chau

 

Appendix 4          

Details of Ecological Impact Assessment

Appendix 4.1 

Works Programme

Appendix 4.2 

Plant Species recorded within the Study Area

Appendix 4.3 

Bird species recorded within the Study Area

Appendix 4.4 

Herpetofauna and Mammal recorded within the Study Area

Appendix 4.5 

Butterfly Species recorded within the Study Area

Appendix 4.6 

Dragonfly recorded within the Study Area

Appendix 4.7 

Marine Ecological Survey Results

 

Appendix 6          

Marine Archaeological Investigation

 

Appendix 8.1       

Details of Construction Noise Impact Assessment

 

Appendix 10        

Project Implementation Schedule

 

 

LIST OF TABLES

Table 2.1              

Summary of the Evaluation of Alternative Options for the Improvement of Fresh Water Supply to Cheung Chau

Table 2.2              

Summary of Public Consultation

 

Table 3.1              

Water Quality Objectives for Southern WCZ

Table 3.2              

Summary of EPD Marine Water Quality Data for Southern WCZ (SM12) in 2008

 

Table 4.1              

Habitats recorded within the Assessment Area

Table 4.2              

Evaluation of Plantation Habitat within the Assessment Area

Table 4.3              

Evaluation of Shrubland-Grassland Habitat within the Assessment Area

Table 4.4              

Evaluation of Developed Area within the Assessment Area

Table 4.5              

Evaluation of Sandy Shore within the Assessment Area

Table 4.6              

Evaluation of Rocky Shore within the Assessment Area

Table 4.7              

Evaluation of Artificial Seawall within the Assessment Area

Table 4.8              

Evaluation of Marine Waters within the Assessment Area

Table 4.9              

Evaluation of Flora Species of Conservation Concern within the Study Area

Table 4.10            

Evaluation of Fauna Species of Conservation Concern within the Study Area

Table 4.11            

Habitat Loss caused by the Project

 

Table 5.1              

Evaluation of Fisheries Impact

 

Table 6.1              

Assessment of Terrestrial Archaeological Potential of the Project

 

Table 7.1              

Types of C&D Materials and Wastes Generated by the Project

Table 7.2              

The Estimated Quantities of C&D Materials and C&D Waste Arising from the Project

Table 7.3              

Summary of the Quantities and Disposal Routes of C&D Materials and Waste Arising from the Project

Table 7.4              

Preliminary Disposal Programme of the C&D Materials

 

Table 8.1              

EIAO-TM Daytime Construction Noise Standards

Table 8.2              

Representative Noise Sensitive Receivers (NSRs)

Table 8.3              

Predicted Noise Level during Construction at Cheung Chau - Unmitigated

Table 8.4              

Quiet Powered Mechanical Equipment Recommended for Use during Construction Phase

Table 8.5              

Predicted Noise Level during Construction at Cheung Chau - Mitigated (Level 1 Mitigation: Use of Quiet Plant)

Table 8.6              

Predicted Noise Level during Construction at Cheung Chau - Mitigated (Level 2 Mitigation: Use of Quiet Plant + Temporary Noise Barrier)

 

Table 9.1              

Water Quality Monitoring Stations during Construction Stage

Table 9.2              

Representative NSRs chosen for Noise Monitoring during Construction Stage

 

LIST OF FIGURES

Figure 1.1             

General Location Plan

Figure 1.2             

General Location Plan of the Project (Aerial View)

Figure 2.1             

Proposed Main Alignment – Key Plan

Figure 2.2             

Proposed Main Alignment (Cheung Chau Landfall)

Figure 2.3             

Proposed Main Alignment (Lantau Landfall)

Figure 2.4             

Schematic Layout of Proposed Launching Site at Cheung Chau

Figure 2.5             

Schematic Layout of Proposed Reception Site at Lantau

Figure 2.6             

Options considered for Improvement of Fresh Water Supply to Cheung Chau

Figure 2.7             

Proposed HDD Pipe Alignment

Figure 2.8             

Typical HDD Procedures for this Project

Figure 2.9             

Landscaping Measures for the Proposed Land-Based Main at Cheung Chau

Figure 2.10          

Landscaping Measures for the Proposed Land-Based Main at Lantau

 

Figure 3.1             

Location of EPD Marine Water Quality Monitoring Station near the Project

Figure 3.2             

Water Sensitive Receivers within the Study Area

Figure 3.3             

Proposed Water Quality Mitigation Measures for the Launching Site at Cheung Chau

Figure 3.4             

Proposed Water Quality Mitigation Measures for the Reception Site at Lantau

 

Figure 4.1             

Study Area, Sites of Conservation Importance and Sampling Locations

Figure 4.2             

Seasonal Distribution of Chinese White Dolphin in Hong Kong Waters (April 2008 – February 2009)

Figure 4.3             

Seasonal Distribution of Finless Porpoise in Hong Kong Waters (2004 – 2009)

Figure 4.4a          

Habitat Map and Locations of Species of Conservation Concern

Figure 4.4b          

Habitat Map and Locations of Species of Conservation Concern (close-up at Chi Ma Wan Landfall Point)

Figure 4.4c          

Habitat Map and Locations of Species of Conservation Concern (close-up at Tai Kwai Wan Landfall Point)

Figure 4.5             

Photos of Habitats, Species of Conservation Concern and Works Area

Figure 4.6             

Coral Species recorded within the Study Area

 

Figure 5.1             

Locations of Fisheries Resources within the Study Area

Figure 5.2             

Distribution of Overall fisheries Production (Adult Fish) in terms of Production (kg/ha)

Figure 5.3             

Distribution of Overall fisheries Production (Adult Fish & Fish Fry) in terms of Production (HK$/ha)

 

Figure 6.3.1         

Geological Map of Chi Ma Wan

Figure 6.3.2         

Geological Map of Cheung Chau

Figure 6.3.3         

Location of Tai Kwai Wan Archaeological Site

Figure 6.3.4         

2007 Aerial Photograph of Chi Ma Wan

Figure 6.3.5         

1945 Aerial Photograph of Tai Kwai Wan

Figure 6.3.6         

1980 Topographic Map overlaid on Current Topographic Map showing Landform Changes at Tai Kwai Wan

Figure 6.3.7         

1963 Aerial Photograph of Tai Kwai Wan

Figure 6.3.8         

1985 Aerial Photograph of Tai Kwai Wan

Figure 6.4.1         

Seabed Features of the Survey Area (Sheet 1 of 2)

Figure 6.4.2         

Seabed Features of the Survey Area (Sheet 2 of 2)

 

Figure 8.1             

Locations of Noise Sensitive Receivers

Figure 8.2             

Location of Proposed Temporary Noise Barrier

 

Figure 9.1             

Locations of Proposed Water Quality Monitoring Stations

Figure 9.2             

Locations of Proposed Noise Monitoring Station and Noise Sensitive Receivers

 

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