CONTENTS

Chapter

1........... Introduction

1.1........ Project Background

1.2........ Background to this EIA

1.3........ Purpose and Approach of the EIA Study

1.4........ Structure of this EIA Study Report

2........... PROJECT DESCRIPTION

2.1 Location and Description of the Project

2.2 Need of the Project

2.3 Scenarios With and Without the ProjeCT

2.4 Consideration of Alternative Treatment Level

2.5 Consideration of Alternative Design, Layout and Outfall Alignment

2.6 Consideration of Alternative Construction Methods and Sequence of Works

2.7 Selection of Preferred Scenario

2.8 Programme

2.9 Public Consultations

2.10 Project Interfaces and Concurrent Projects

3........... AIR QUALITY IMPACT ASSESSMENT

3.1 Introduction

3.2 Legislation Requirement & Assessment Criteria

3.3 Baseline Condition

3.4 Air Sensitive Receivers

3.5 Potential Sources of Impact

3.6 Impact Assessment

3.7 Mitigation Measures

3.8 Residual Impacts

3.9 Environmental Monitoring & Audit

3.10 Conclusions

4........... NOISE IMPACT ASSESSMENT

4.1 Introduction

4.2 Relevant Legislation, Policies, Standards and Criteria

4.3 Baseline Conditions

4.4 Noise Sensitive Receivers

4.5 Potential Sources of Impacts

4.6 Assessment Methodology

4.7 Impact Assessment

4.8 Mitigation Measures

4.9 Residual Impacts

4.10 Cumulative Impacts

4.11 Monitoring and Audit Requirement

4.12 Conclusion

5........... water quality IMPACT ASSESSMENT

5.1 Introduction

5.2 Legislation Requirement & Guidelines

5.3 Baseline Condition

5.4 Water Quality Sensitive Receivers

5.5 Assessment CriteriA

5.6 ASSESSMENT METHODOLOGY

5.7 Potential Sources of Impact

5.8 Impact Assessment

5.9 Mitigation Measures

5.10 Residual Impacts

5.11 Cumulative Impacts

5.12 Environmental Monitoring and Audit

5.13 Conclusion

6........... WASTE management IMPLICATION and Land Contaminationn assessment

6.1 Introduction

6.2 Relevant Legislation, Policies, Standards and Criteria

6.3 Assessment Methodology

6.4 Sources and Types of Waste arising from the Project

6.5 Impact Assessment and Evaluation

6.6 Mitigation Measures

6.7 Land Contamination

6.8 Evaluation of Residual Impacts

6.9 Environmental Audit

6.10 Summary

7........... Ecological Impact Assessment (Terrestrial and Marine)

7.1 Introduction

7.2 Legislative Requirements & Evaluation Criteria

7.3 Baseline Conditions

7.4 Impact Identification

7.5 Impact Assessment

7.6 Impact Evaluation

7.7 Mitigation Measures

7.8 Cumulative Impact

7.9 Residual Impact

7.10 Environmental Monitoring & Audit (EM&A)

7.11 Conclusions

8........... Fisheries Impact Assessment

8.1 Introduction

8.2 Relevant Legislation & Assessment Criteria

8.3 Baseline Conditions & Fisheries Sensitive Receivers

8.4 Assessment Methodology

8.5 Potential Impacts & Impact Assessment on Fisheries Resources

8.6 Impact Evaluation

8.7 Mitigation Measures

8.8 Residual Impacts

8.9 Cumulative Impacts

8.10 Environmental Monitoring & Audit

8.11 Conclusions

9........... LANDSCAPE AND VISUAL IMPACT ASSESSMENT

9.1 Introduction

9.2 Environmental Legislation, Standards and Guidelines

9.3 Assessment Area

9.4 Assessment Methodology

9.5 Planning and Development Control Framework

9.6 Findings of Baseline Study

9.7 Potential Sources of Landscape and Visual Impact

9.8 Landscape Impact Assessment

9.9 Cumulative Landscape Impacts

9.10 Visual Impact Assessment

9.11 Cumulative Visual Impacts

9.12 Conclusions

10........ cultural heritage IMPACT aSSESSMENT

10.1 Introduction

10.2 Relevant Legislations, Standards and Guidelines

10.3 Built Heritage Impact Assessment

11........ summary of environmental outcomes

11.1 Introduction

11.2 Air Quality Impact

11.3 Noise ImpaCT

11.4 Water Quality Impact

11.5 Waste Management Implication and Land Contamination

11.6 Ecological Impact (Terrestrial And Marine)

11.7 Fisheries Impact

11.8 Landscape and Visual Impacts

11.9 Cultural Heritage

11.10 Environmental Benefits of the Project

11.11 Environmentally Friendly Design Recommended

11.12 Key Environmental Problems Avoided, Population and Environmentally Sensitive Areas Protected

12........ environmental monitoring and audit (EM&a) requirements

12.1 Introduction

12.2 Objective of EM&A

12.3 Air Quality

12.4 Noise

12.5 Water Quality

12.6 Waste Management

12.7 Ecology

12.8 FISHERIES

12.9 Landscape and Visual Impact

12.10 Cultural Heritage

13........ Conclusion

13.1 project background

13.2 purpose and nature of the project

13.3 purpose and approach of the eia study

13.4 justification for the need of the project

13.5 project components and project layout

13.6 site location and history

13.7 project programme

13.8 consideration of alternative treatment level, design, layout, outfall alignment, construction methods and sequence of works

13.9 air quality

13.10 noise

13.11 water quality

13.12 waste management and land contamination

13.13 ecology

13.14 fisheries

13.15 landscape & visual

13.16 cultural heritage

13.17 environmental monitoring & audit

13.18 overall conclusion

Drawings

Figure 1.1	Key Location Plan
Figure 2.1a	Proposed Layout Plan
Figure 2.1b	Proposed Layout Plan
Figure 2.1c	Aerial Photo of Existing STKSTW
Figure 2.2	Schematic Process Flow Diagram of STKSTW
Figure 2.3	Schematic Process Flow Diagram of Temporary Sewage Treatment Plant
Figure 2.4a	General Layout Plan of Expanded STKSTW and Temporary STP
Figure 2.4b	General Layout Plan of Expanded STKSTW
Figure 2.5	Roof Plan of Expanded STKSTW
Figure 2.6	+15.25mPD Floor Plan of Expanded STKSTW
Figure 2.7	+11.25mPD Floor Plan of Expanded STKSTW
Figure 2.8	+5.25mPD Floor Plan of Expanded STKSTW
Figure 2.9	-0.80mPD Level Plan of Expanded STKSTW
Figure 2.10	Section A-A & B-B
Figure 2.11	Elevation A & B
Figure 2.12	Elevation C & D
Figure 2.13	Elevation E & F (of Temporary STP)
Figure 2.14	Elevation G & H (of Temporary STP)
Figure 2.15	Options for Proposed Submarine Outfall
Figure 2.16	Options for Gravity Sewer
Figure 2.17	Typical Horizontal Direction Drilling Method for Submarine Outfall Construction
Figure 2.18	Expansion Scheme – Option 1
Figure 2.19	Expansion Scheme – Option 2
Figure 2.20	Expansion Scheme – Option 3
Figure 2.21	Dredging Area under Concurrent Project “Sediment Removal at Sha Tau Kok Fish Culture Zone, Boast Shelter and Approach Channel”
Figure 2.22	Works Area under Concurrent Project “Drainage Improvement Works at North District, including Various Drainage Improvement Measures in Sha Tau Kok”
Figure 2.23	Location of Concurrent Project “The Construction of the Public Rental Housing Estate at Sha Tau Kok under Hong Kong Housing Society’s Project”
Figure 2.24	Alternative Layout Plan of Expanded STKSTW
Figure 2.25	Elevation I
Figure 3.1	Locations of Representative Air Sensitive Receivers
Figure 3.2	Predicted Maximum 5-second Averaged Odour Concentration at 1.5m Above Ground during Operation of Temporary Sewage Treatment Plant
Figure 3.3	Predicted Maximum 5-second Averaged Odour Concentration at 10.5m Above Ground during Operation of Temporary Sewage Treatment Plant
Figure 3.4	Predicted Maximum 5-second Averaged Odour Concentration at 1.5m Above Ground during Operation of Permenant Sewage Treatment Works
Figure 3.5	Predicted Maximum 5-second Averaged Odour Concentration at 10.5m Above Ground during Operation of Permanent Sewage Treatment Works
Figure 4.1	Location Plan of Proposed Noise Monitoring Station and Noise Sensitive Receivers
Figure 5.1	Water Sensitive Receiver near the Project
Figure 5.2	Locations of Geophysical Survey Locations
Figure 5.3	Consideration of Concurrent Projects
Figure 7.1	Project Layout and the Surrounding Ecological Resources
Figure 7.1a	Project Layout and the Surrounding Ecological Resources (500m Study Area)
Figure 7.2	100m No Works Boundary from the Night Roosting Site
Figure 8.1	Distribution of Fishing Operation Vessels in Hong Kong Water as recorded by Agriculture, Fisheries and Conservation Department in Port Survey 2006
Figure 8.2	Distribution of Fishing Production (Adult Fish) in terms of Weight (kg/ha) in Hong Kong Water as recorded by Agriculture, Fisheries and Conservation Department in Port Survey 2006
Figure 8.3	Distribution of Fishing Production (Adult Fish & Fish Fry) in terms of Value (HK$/ha) in Hong Kong Water as recorded by Agriculture, Fisheries and Conservation Department in Port Survey 2006
Figure 8.4	Distribution of Fishing Production (Fish Fry) in terms of Density (tails/ha) in Hong Kong Water as recorded by Agriculture, Fisheries and Conservation Department in Port Survey 2006
Figure 8.5	Fisheries Sensitive Receivers
Figure 9.1	Extent of Landscape Impact Assessment
Figure 9.1a	Aerial View of Landscape Assessment Area
Figure 9.2	Plan of ZVI and VSRs
Figure 9.2a	Visual Condition
Figure 9.3	Plan of Land Use Zoning
Figure 9.4	Location Plan of Landscape Resources
Figure 9.4a-k	Photographs of Landscape Resources (1) – (11)
Figure 9.5	Location Plan of Landscape Character Area
Figure 9.5a-d	Photographs of Landscape Character Areas (1) – (4)
Figure 9.6a-i	Views of Visually Sensitive Receivers (1) – (9)
Figure 9.7	Impacts on Landscape Resources
Figure 9.8	Impacts on Landscape Character Area
Figure 9.9	Recommendation Mitigation Measures (1)
Figure 9.9a	Recommendation Mitigation Measures (2)
Figure 9.10	Visual Impacts
Figure 9.11	Plan of Photomontages
Figure 9.11a-i	Photomontages
Figure 9.12	View of Existing Site and Proposed TSTP
Figure 10.1	Study Area of Built Heritage Impact Assessment
Figure 10.2	Identified Built Heritage at Ha Tam Shui Hang & Sha Tau Kok

Appendices

Annex 2A	Emergency Response Plan
Annex 3A-1	Odour Emission Rate Estimation for Permanent Sha Tau Kok Sewage Treatment Works (STKSTW) and Temporary Sewage Treatment Plant (TSTP)
Annex 3A-2	Emission Input to Model
Annex 3A-3	Calculation of Odour Emission rate in STKSTW
Annex 3A-4	Calculation of Odour Emission rate in TSTP
Annex 4A	Summary of Baseline Noise Monitoring
Annex 4B	Photos of Noise Sensitive Receivers
Annex 4C	Details of Construction Noise Impact Assessment
Annex 4D	Details of Operational Noise Impact Assessment of Expanded STKSTW
Annex 4E	Details of Operational Noise Impact Assessment of TSTP
Annex 5A	Water Quality Modelling Methodology Statement
Annex 5B	Detailed CORMIX Modelling Results
Annex 5C	Technical Note on Delft3D Water Quality Model
Annex 5D	Construction Phase Sediment Plume Modelling Results
Annex 5E	Sediment Testing Report
Annex 5F	Construction Phase Pollutant Release Modelling Results
Annex 5G	Delft3D WAQ Outfall Tracer Simulation
Annex 5H	Delft3D WAQ Modelling Results 2030 baseline and Expanded STKSTW
Annex 5I	Method Statement for Emergency Discharge Modelling for the TSTP and the Expanded STKSTW Operation
Annex 5J	Counter Plot Results For The Emergency Discharge Modelling
Annex 5K	Timeseries Results For The Emergency Discharge Modelling At Nearby Mariculture Zones
Annex 5L	Loading Calculation for TSTP
Annex 5M	Assessment of Potential Water Qality Impact at Hong Kong Mainland Marine Border
Annex 6A	EPD Sediment Sampling and Testing Plan
Annex 6B	Sediment Quality Report
Annex 6C	Historical Aerial Photos
Annex 6D	Existing Site Conditions of the Works Area
Annex 6E	Correspondence from Relevant Authorities
Annex 6F	Site Walkover Checklist - STKSTW
Annex 6G	Site Walkover Checklist - STKSPS
Annex 7A	Baseline Ecological Survey Report
Annex 7B	Supplementary Coral Survey Report
Annex 9A	Summary of Tree Survey Findings
Annex 10A	Photo Images of Build Heritage Features
Annex 12A	Implementation Schedule of Recommended Mitigation Measures