CONTENT

 

 

 

Page

 

 

 

1.

INTRODUCTION

1-1

 

 

 

1.1

Project Background

1-1

1.2

EIA Study Brief

1-2

1.3

Objectives of the EIA Study

1-2

1.4

Organisation of the Report

1-3

 

 

 

2.

PROJECT DESCRIPTION

2-1

 

 

 

2.1

General Description of the Project

2-1

2.2

Designated Project

2-3

2.3

Construction Activities

2-3

2.4

Scope of Works during Operational Phase

2-4

2.5

Construction Programme

2-4

2.6

Concurrent Projects and Evaluation of Potential Cumulative Impacts

2-5

2.7

Public Consultation

2-7

2.8

References

2-7

 

 

 

3.

CONSIDERATION OF ALTERNATIVES

3-1

 

 

 

3.1

Need of the Project

3-1

3.2

Environmental Benefits

3-2

3.3

Consideration of “Without Project” Alternative

3-3

3.4

Consideration of Alternative Design and Layout

3-3

3.5

Construction Related Aspects

3-6

3.6

Consideration of Alternative Construction Methods and Sequences of Works

3-6

 

 

 

4.

AIR QUALITY IMPACT ASSESSMENT

4-1

 

 

 

4.1

Introduction

4-1

4.2

Statutory Requirements and Evaluation Criteria

4-1

4.3

Study Area

4-1

4.4

Identification of Air Sensitive Receivers

4-2

4.5

Existing Air Quality

4-2

4.6

Evaluation of Impacts during Construction Phase

4-4

4.7

Evaluation of Impacts during Operation Phase

4-5

4.8

Mitigation Measures

4-6

4.9

Potential for Cumulative Impacts

4-7

4.10

Residual Impacts

4-8

4.11

Monitoring and Audit Requirements

4-8

4.12

Conclusion

4-8

4.13

References

4-9

 

 

 

 

 

 

 

 

 

 

5

NOISE IMPACT ASSESSMENT

5-1

 

 

 

5.1

Introduction

5-1

5.3

Baseline Conditions

5-6

5.4

Noise Sensitive Receivers

5-7

5.5

Potential Sources of Impacts

5-9

5.6

Assessment Methodology

5-10

5.7

Impact Assessment

5-12

5.8

Mitigation Measures

5-14

5.9

Cumulative Impacts

5-19

5.10

Residual Impacts

5-23

5.11

Monitoring and Audit Requirement

5-23

5.12

Conclusion

5-23

5.13

References

5-24

 

 

 

6.

WATER QUALITY IMPACT ASSESSMENT

6-1

 

 

 

6.1

Introduction

6-1

6.2

Environmental Legislation, Policies, Standards and Criteria

6-1

6.3

Baseline Water Quality Conditions

6-3

6.4

Water Sensitive Receivers

6-8

6.5

Potential Sources of Impacts

6-9

6.6

Impact Assessment

6-10

6.7

Mitigation Measures

6-17

6.8

Cumulative Impacts

6-22

6.9

Residual Impacts

6-24

6.10

Monitoring and Audit Requirement

6-24

6.11

Conclusion

6-25

6.12

References

6-26

 

 

 

7.

WASTE MANAGEMENT AND LAND CONTAMINATION

7-1

 

 

 

7.1

Introduction

7-1

7.2

Relevant Legislation, Policies, Standards and Criteria

7-1

7.3

Assessment Methodology

7-5

7.4

Expected Waste Sources

7-5

7.5

Waste Management Assessment

7-6

7.6

Mitigation Measures

7-9

7.7

Land Contamination

7-15

7.8

Residual Environmental Impacts

7-17

7.9

Environmental Monitoring and Audit Requirements

7-17

7.10

Conclusion

7-18

 

 

 

8

ECOLOGICAL IMPACT ASSESSMENT

8-1

 

 

 

8.1

Introduction

8-1

8.2

Relevant Legislation, Standards, and Guidelines

8-1

8.3

Assessment Methodology

8-2

8.4

Recognized Sites of Conservation Importance

8-7

8.5

Literature Review

8-8

8.6

Field Survey Results

8-16

8.7

Ecological Evaluation

8-26

8.8

Identification and Evaluation of Potential Impacts

8-34

8.9

Mitigation Measures

8-40

8.10

Cumulative Ecological Impact

8-40

8.11

Residual Ecological Impact

8-41

8.12

Monitoring and Audit Requirement

8-42

8.13

Conclusion

8-42

8.14

References

8-42

 

 

 

9.

LANDSCAPE AND VISUAL IMPACT ASSESSMENT

9-1

 

 

 

9.1

Introduction

9-1

9.2

Environmental Legislation, Policies, Standards and Criteria

9-1

9.3

Planning and Development Control Framework

9-2

9.4

Landscape Impact Assessment

9-3

9.5

Visual Impact Assessment

9-23

9.6

Mitigation Measures

9-37

9.7

Residual Impacts

9-38

9.8

Cumulative Impacts

9-39

9.9

Monitoring and Audit Requirement

9-40

9.10

Conclusion

9-41

 

 

 

10.

ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS

10-1

 

 

 

10.1

Introduction

10-1

10.2

EM&A Manual and Implementation Schedule

10-1

10.3

Objectives of EM&A

10-2

10.4

Air Quality

10-2

10.5

Noise

10-2

10.6

Water Quality

10-3

10.7

Waste Management

10-4

10.8

Ecology

10-5

10.9

Landscape and Visual

10-5

 

 

 

11.

CONCLUSION AND SUMMARY OF ENVIRONMENTAL OUTCOMES

11-1

 

 

 

11.1

Introduction

11-1

11.2

Environmental Benefits of the Project

11-1

11.3

Air Quality

11-1

11.4

Noise

11-2

11.5

Water Quality

11-2

11.6

Waste Management and Land Contamination

11-3

11.7

Ecology

11-4

11.8

Landscape and Visual Impact

11-4

11.9

EM&A Requirement

11-5

11.10

Overall Conclusion

11-5

 

 

 

 

END OF TEXT

 


LIST OF TABLES

 

Table 2.1          Scale of Proposed Project         

Table 2.2          Tentative Construction Schedule

Table 2.3          Evaluation of Cumulative Impacts due to Concurrent Projects

Table 3.1          Proposed Discharge Standard of Yuen Long Effluent Polishing Plant

Table 3.2          Water Sampling Results

Table 3.3          Impacts on Existing Sewerage System

Table 4.1          Hong Kong Air Quality Objectives

Table 4.2          Identified Representative Air Sensitive Receivers

Table 4.3          5-year Averaged Annual Background Concentration of Air Pollutants recorded at Yuen Long Station by EPD for the Period of 2013-2017

Table 5.1          EIAO-TM Day-time Construction Noise Standards

Table 5.2          Area Sensitivity Ratings

Table 5.3          Acceptable Noise Levels (ANLs) for General Construction Works to be carried out during Restricted Hours (GW-TM)

Table 5.4          ANLs for Fixed Noise Source under NCO

Table 5.5          Noise Criteria for Fixed Plant Noise under EIAO

Table 5.6          Measured Baseline Noise Levels

Table 5.7          Representative Noise Sensitive Receivers (NSRs)

Table 5.8          Predicted Construction Noise Levels (Without Mitigation Measures)

Table 5.9          Predicted Fixed Plant Noise Levels due to the Proposed DWF Pumping Station

Table 5.10        Sound Power Level of Quiet PME

Table 5.11        Predicted Construction Noise Levels (With Mitigation Measures)

Table 5.12        Predicted Cumulative Construction Noise Levels

Table 5.13        Predicted Cumulative Fixed Plant Noise Levels

Table 6.1          Key Water Quality Objectives of the Deep Bay WCZ for Yuen Long & Kam Tin (Upper) Subzone and Yuen Long & Kam Tin (Lower) Subzone  

Table 6.2          Summary of River Water Quality Monitoring Data collected by EPD River Water Quality Monitoring Programme for Stations in YLTN, MN and SHN (2018)

Table 6.3          Summary of River Water Quality Monitoring Data collected by EPD River Water Quality Monitoring Programme for Stations in Kam Tin River (2018)

Table 6.4          Water Sampling Results

Table 6.5          Monthly Mean BOD5 and SS Levels recorded for the Treated Effluent from YLSTW from January 2009 to December 2018

Table 6.6          Identified Water Quality Sensitive Receivers (WSRs)

Table 6.7          Anticipated Improvement to Water Quality in YLTN

Table 7.1          Government Facilities for Disposal of C&D Materials

Table 7.2          Estimated Quantities of C&D Materials generated, reused and disposed during Construction

Table 7.3          Review of Historical Aerial Photographs

Table 8.1          Ecological Survey Programme

Table 8.2          Mammal Species of Conservation Importance in or near the Study Area in Previous Studies

Table 8.3          Bird Species of Conservation Importance Recorded in Shan Pui River and/or Nam Sang Wai in Previous Studies

Table 8.4          Habitats Present within the Project Site and the 500m Study Area

Table 8.5          List of Bird Species of Conservation Importance Recorded during the Survey Period

Table 8.6          List of Butterfly Species of Conservation Importance Recorded during the Survey Period

Table 8.7          List of Intertidal/Benthic Fauna Species Recorded in September 2019

Table 8.8          Results of Intertidal/Benthic Fauna Survey conducted in September 2019

Table 8.9          Habitat Evaluation for Yuen Long Town Nullah

Table 8.10        Habitat Evaluation for Shan Pui River and Minor Channelised Watercourse

Table 8.11        Habitat Evaluation for old Kam Tin River         

Table 8.12        Habitat Evaluation for Pond     

Table 8.13        Habitat Evaluation for Tidal Marsh and Mangrove

Table 8.14        Habitat Evaluation for Reedbed

Table 8.15        Habitat Evaluation for Shrubland          

Table 8.16        Habitat Evaluation for Agricultural Land          

Table 8.17        Habitat Evaluation for Plantation          

Table 8.18        Habitat Evaluation for Developed Area 

Table 8.19        Evaluation for Floral Species of Conservation Importance         

Table 8.20        Evaluation for Faunal Species of Conservation Importance        

Table 8.21        Evaluation of Ecological Impact of Habitat Loss

Table 8.22        Evaluation of Ecological Impacts on Sites of Conservation Importance   

Table 8.23        Evaluation of Ecological Impacts on Species of Conservation Importance

Table 9.1          Zoning Types and Areas affected by the Project

Table 9.2          Impact Significance of Landscape or Visual Impact

Table 9.3          Landscape Resources Identified within Assessment Area

Table 9.4          Sensitivity of Landscape Resources

Table 9.5          Surveyed Tree Species and Quantity within the Project Boundary

Table 9.6          Landscape Character Areas Identified within Assessment Area

Table 9.7          Sensitivity of Landscape Character Area

Table 9.8          Magnitude of Landscape Impact on LRs

Table 9.9          Magnitude of Landscape Impact on LCAs

Table 9.10        Significance of Landscape Impacts on LRs

Table 9.11        Significance of Landscape Impacts on LCAs

Table 9.12        Representative Visually Sensitive Receivers in the Vicinity of the Site

Table 9.13        Magnitude of Visual Impact

Table 9.14        Significance Thresholds of Visual Impacts

Table 9.15        Proposed Mitigation Measures for Construction Phase

Table 9.16        Proposed Mitigation Measures for Operation Phase

Table 10.1        Summary of EM&A Requirements

 

LIST OF FIGURES

 

Figure 1.1        General Location Plan of the Project

Figure 2.1        General Layout Plan

Figure 2.2        Schematic Diagram for Dry Weather Flow Interception System

Figure 2.3        Nullah Cross Section

Figure 2.4        Locations of Concurrent Projects

Figure 4.1        Representative Air Sensitive Receivers

Figure 5.1a-e   Representative Noise Sensitive Receivers

Figure 5.2        Representative Noise Sensitive Receivers (Operation Phase)

Figure 6.1        Location of Yuen Long Town Nullah

Figure 6.2        Water Quality Sensitive Receivers

Figure 6.3        Sewage Treatment Process Flowchart of the Yuen Long Sewage Treatment Works

Figure 6.4        Discharge Point of Existing Low-flow Pumping Station

Figure 8.1        Recognized Sites of Conservation Importance

Figure 8.2        Habitat Map with Indicative Locations of Non-bird Species of Conservation Importance Recorded

Figure 8.3        Watercourses Identified within the Study Area

Figure 9.1        Review of the Planning and Development Control Framework

Figure 9.2        Existing Landscape Resources

Figure 9.3        Existing Landscape Character Areas

Figure 9.4        Visual Envelope and Representative Visual Sensitive Receivers

Figure 9.5        Representative Photos taken along the Project Alignment

Figure 9.6        Vantage Points

Figure 9.7a      DWF Pumping Station Elevation View 1

Figure 9.7b      DWF Pumping Station Elevation View 2

Figure 9.7c      DWF Pumping Station Elevation View 3

Figure 9.8a      Photomontage for Vantage Point T1

Figure 9.8b      Photomontage for Vantage Point T2

Figure 9.8c      Photomontage for Vantage Point T3

Figure 9.9        Landscape Mitigation Plan

 

ANNEXES

 

Annex 2A       Proposed Layout Plan

Annex 2B        General Layout Plan for the Proposed DWF Pumping Station

Annex 5A       Background Noise Monitoring Data

Annex 5B        Photos of Representative Noise Sensitive Receivers

Annex 5C        Noise Impact Assessment – Improvement of Yuen Long Town Nullah Project

Annex 7A       Historical Aerial Photos

Annex 7B        Representative Photos showing the Existing Site Conditions

Annex 7C        Correspondences with Government Departments

Annex 8A       Floral Species Recorded within the Project Site and Study Area

Annex 8B        Faunal Species Recorded within the Project Site and the Study Area

Annex 8C        Representative Photographs of Habitats and Species of Conservation Importance Recorded within the Study Area

Annex 9A       Broad-Brush Tree Survey Results

Annex 9B        Potential OVTs

Annex 9C        Existing View of the Representative Visual Sensitive Receivers

Annex 10A     Implementation Schedule of Environmental Protection Measures for the Project