Environmental Protection Department
West New Territories (WENT)
Landfill Extensions
Environmental Impact
Assessment Report
Contents
1.1 Project Background
1.2 Purpose and Scope of the EIA Study
1.3 The Approach
1.4 Structure of the EIA Report
2.1 Key
Project Requirements
2.2 Need
for the Project
2.3 Consideration
of Alternatives
2.4 Selection
of Preferred Layout Options
2.5 Site
Location and Site History
2.6 Scope
of the Project
2.7 Size,
Scale, Shape and Design of the Project
2.8 Contractual
Arrangements
2.9 Project
Timetable
2.10 Concurrent
Projects
2.11 “What
if IWMF not proceed”
3.1 Introduction
3.2 Environmental Legislation, Standards and
Guideline
3.3 Description of the Existing WENT Landfill
and WENT Landfill Extension
3.4 Air Sensitive Receivers
3.5 Identification of Air Pollution Source and
Environmental Impact
3.6 Assessment Methodology
3.7 Prediction and Evaluation of Air Quality
Impact
3.8 Mitigation Measures
3.9 Residual Environmental Impact
3.10 Conclusion
4.1 Introduction
4.2 Environmental Legislation, Standards and
Guidelines
4.3 Noise Sensitive Receivers
4.4 Construction Noise Assessment
4.5 Road Traffic Noise Assessment
4.6 On-Site Operation Noise Assessment
4.7 Conclusion
5.1 Introduction
5.2 Environmental Legislation, Standards and
Guidelines
5.3 Baseline Conditions
5.4 Water Sensitive Receivers
5.5 Potential Impacts of Different Phases
5.6 Construction Phase
5.7 Operation Phase
5.8 Restoration and Aftercare Phase
5.9 Cumulative Impacts
5.10 Residual Impacts
5.11 Conclusion
5.12 Reference
6 WASTE
MANAGEMENT IMPLICATIONS
6.1 Introduction
6.2 Legislation, Standards and Guidelines
6.3 Assessment Methodology
6.4 Identification and Evaluation of Waste
Management Implications
6.5 Mitigation Measures
6.6 Residual Impacts
6.7 Environmental Audit
6.8 Implication of STF Implementation
6.9 Conclusion
7. LANDFILL GAS HAZARD ASSESSMENT
7.1 Introduction
7.2 Legislation, Standards and Guidelines
7.3 Background Information
7.4 LFG Hazard Assessment
7.5 Qualitative Risk Assessment
7.6 Protective and Precautionary Measures
7.7 Monitoring Requirement
7.8 Conclusion
8 IMPACT
ON LANDSCAPE AND VISUAL
8.1 General
8.2 Environmental Legislation & Standards
8.3 Baseline Study Methodology
8.4 Residual Impacts Assessment Methodology
8.5 Baseline Condition
8.6 Planning and Development Control Review
8.7 Mitigation Measures
8.8 Landscape Impact Assessment
8.9 Visual Impact Assessment
8.10 Cumulative Impacts
8.11 “What If IWMF not proceed”
8.12 Conclusion
9.1 Introduction
9.2 Environmental Legislation & Standards
9.3 Built Heritage Impact Assessment
9.4 Archaeological Impact Assessment
9.5 “What If IWMF not proceed”
9.6 Mitigation Recommendations
9.7 Conclusion
9.8 References
10.1 Introduction
10.2 Relevant Legislation and
Guidelines
10.3 Key Ecological Issues
10.4 Results of Literature
Review
10.5 Field Survey Scope and
Methodology
10.6 Results of Field Surveys
10.7 Impact Identification and
Evaluation
10.8 Impact Avoidance and
Mitigation Measures
10.9 Residual Ecological Impacts
10.10 Ecological Monitoring and
Audits
10.11 Conclusion
10.12 Reference
11 POTENTIAL ENVIRONMENTAL IMPACT ASSOCIATED WITH PULVERIZED FUEL
ASH
11.1 Introduction
11.2 Health Hazard of Radon
11.3 Radon Characteristics of the Project
11.4 Risk Assessment of Radon Emission Associated
with PFA
11.5 Recommended Measures to Control Radon Health
Risk
11.6 “What if IWMF not proceed”
11.7 Conclusions
11.8 Reference
12 ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS
12.1 Introduction
12.2 Project Organisation
12.3 EM&A Manual and Implementation Schedule
12.4 EM&A Programme
12.5 Method Statements
14.1 Option Evaluation
14.2 Air Quality Impact
14.3 Noise Impact
14.4 Water
Quality
14.5 Waste
Management
14.6 Landfill
Gas Hazards
14.7 Landscape
and Visual Impact
14.8 Cultural
Heritage Impact
14.9 Ecological
Impact
14.10 Pulverized
Fuel Ash Impact
14.11 Summary of
Environmental Outcome
14.12 Environmental
Monitoring and Audit
14.13 Overall
Conclusion
Appendices
Appendix 2.1 Tentative
Outline Programme
Appendix 3.1a Past Monitoring Record for the Removal Efficiency of Flaring
System
Appendix 3.1b Past 10-year Odour Complaint Records
Appendix 3.3 Detailed
Calculations of Dust Emission Rate
Appendix 3.4 Detailed
Calculations of Vehicular Emission Rate
Appendix 3.6 Emission
Inventory
Appendix 3.7 Odour
Measurement Results
Appendix 3.9 Detailed
Results of Construction Dust Assessment
Appendix 3.10 Detailed
Assessment Results of AQO Pollutants
Appendix 3.11 Detailed
Assessment Results of Non-AQO Pollutants
Appendix 4.1 Construction
Plant Inventory and SWLs
Appendix 4.2a Construction Noise Impacts
Appendix 4.2b Cumulative Construction Noise Impacts
Appendix 4.3 Road
Traffic Noise Calculation
Appendix 4.4 Operation
Noise Calculation
Appendix 4.5 Path
Difference for Barges
Appendix 5.1 Groundwater
monitoring data of Existing WENT Landfill in 2006 and 2007
Appendix 5.2 Groundwater
measurement results for WENT Landfill Extension
Appendix 5.3 Meteorological
Data
Appendix 5.4 Leachate Generation for Existing WENT Landfill
Appendix 6.1 Summary
Table for Waste Management
Appendix 6.2 Waste
Management Plan
Appendix 7.1 Gas
Monitoring Data from 2002 to 2006 of Existing WENT Landfill
Appendix 7.2 Chapter
8 of LFG Guidance Note
Appendix 7.3 Landfill
Gas Protection Measures in Existing WENT Landfill
Appendix 7.4 Specific
Landfill Gas Protection Measures for Building Services
Appendix 10.1 Survey
frequency for various taxa
Appendix 10.2 Plant
Species Recorded within the Study Area
Appendix 10.3 Avifauna
Recorded in the Study Area
Appendix 10.4 Dragonfly
Recorded in the Study Area
Appendix 10.5 Butterfly
Recorded in the Study Area
Appendix 10.6 Herpetofauna & Mammals Recorded in the Study Area
Appendix 10.7 Aquatic
Fauna & Intertidal Fauna Recorded during the present study
Figures
Figure 2.6 Site
Formation Phasing Plan
Figure 3.1 Existing WENT Landfill Dust
Monitoring Locations ASR 4 & ASR 13
Figure 3.2 Existing WENT Landfill VOC
Monitoring Locations OM2 to OM5
Figure 3.3 Air Sensitive Receivers
Figure 3.4i Dust Emission Source Locations
(Contribution from WENT Landfill Extension – Scenario 1)
Figure 3.4k Dust Emission Source Locations
(Contribution from WENT Landfill Extension – Scenario 2)
Figure 3.4m Dust Emission Source Locations
(Contribution from WENT Landfill Extension – Scenario 3)
Figure 3.5a Locations of Potential Emission
Sources
Figure 3.5b NO2 & SO2 Emission Sources
Location
Figure 3.6 Locations of Deodouriser
Units
Figure 3.7a Locations of Tipping Faces
Figure 3.7b Locations of Tipping Faces (with
Mitigation)
Figure 3.8a-1 Contours of 1-hour TSP Concentration at
1.5m above Ground (Scenario 1A)
Figure 3.8a-2 Contours of 24-hour TSP Concentration at
1.5m above Ground (Scenario 1A)
Figure 3.8a-3 Contours of 1-hour TSP Concentration at
1.5m above Ground (Scenario 1B)
Figure 3.8a-4 Contours of 24-hour TSP Concentration at
1.5m above Ground (Scenario 1B)
Figure 3.8a-5 Contours of Annual TSP Concentration at
1.5m above Ground (Scenario 1)
Figure 3.8a Contours of 1-hour TSP Concentration
at 1.5m above Ground (Scenario 2A)
Figure 3.8b Contours of 24-hour TSP Concentration
at 1.5m above Ground (Scenario 2A)
Figure 3.8c Contours of 1-hour TSP Concentration
at 1.5m above Ground (Scenario 2B)
Figure 3.8d Contours of 24-hour TSP Concentration
at 1.5m above Ground (Scenario 2B)
Figure 3.8d-1 Contours of 1-hour TSP Concentration at
1.5m above Ground (Scenario 2C)
Figure 3.8d-2 Contours of 24-hour TSP Concentration at
1.5m above Ground (Scenario 2C)
Figure 3.8e Contours of Annual TSP Concentration
at 1.5m above Ground (Scenario 2)
Figure 3.8h Contours of 1-hour TSP Concentration at
1.5m above Ground (Scenario 3A)
Figure 3.8i Contours of 24-hour TSP
Concentration at 1.5m above Ground (Scenario 3A)
Figure 3.8j Contours of 1-hour TSP Concentration
at 1.5m above Ground (Scenario 3B)
Figure 3.8k Contours of 24-hour TSP Concentration
at 1.5m above Ground (Scenario 3B)
Figure 3.8l Contours of Annual TSP Concentration
at 1.5m above Ground (Scenario 3)
Figure 3.9a Contours of 1-hour NO2 Concentration
at 1.5m above Ground
Figure 3.9b Contours of 1-hour SO2 Concentration
at 1.5m above Ground
Figure 3.9c Contours of 24-hour NO2 Concentration
at 1.5m above Ground
Figure 3.9d Contours of 24-hour SO2 Concentration
at 1.5m above Ground
Figure 3.9e Contours of 24-hour RSP Concentration
at 1.5m above Ground
Figure 3.9f Contours of Annual NO2 Concentration
at 1.5m above Ground
Figure 3.9g Contours of Annual SO2 Concentration
at 1.5m above Ground
Figure 3.9h Contours of Annual RSP Concentration
at 1.5m above Ground
Figure 3.10a Contours of Odour Concentration at 1.5m
above Ground (Scenario 1)
Figure 3.10b Contours of Odour Concentration at 1.5m
above Ground (Scenario 2 with Mitigation)
Figure 3.10c Contours of Odour Concentration at 1.5m
above Ground (Scenario 3)
Figure 3.10d Contours of Odour Concentration at 1.5m
above Ground (Scenario 4 with Mitigation)
Figure 3.10e Contours of Odour Concentration at 1.5m
above Ground (Scenario 5 with Mitigation)
Figure 4.2a Notional Distance from NSR-1
Figure 4.2b Notional Distance from NSR-2
Figure 4.3 Off-site Receivers along Lung Kwu Tan Road
Figure 4.4 Distances of NSR-1 from Barges and
Plants
Figure 4.5 Existing Berths and Noise Bund
Figure 4.6 Screening Effect for Tipping
Activities
Figure 5.1 Groundwater Monitoring Stations at
Existing WENT Landfill
Figure 5.2 Marine Water Quality Monitoring
Stations (DM4, DM5 and NM5)
Figure 5.3 River Water Monitoring Stations in
Deep Bay Water Control Zone
Figure 5.4 Water Sensitive Receivers
Figure 5.4a Proposed Drainage Layout
Figure 5.5 Groundwater Contours for WENT
Landfill Extension
Figure 5.6 Schematic Diagram of the Leachate Treatment Plant
Figure 7.2 Existing WENT Landfill Gas
Monitoring Locations
Figure 7.3 Landfill Liner and Final Capping
Details
Figure 7.5 Mitigation Measures (Sealing of
Fault Line)
Figure 7.6 Typical Design of LFG Cut-Off
Trench Barrier
Figure 7.7 Existing Landfill and Landfill
Extension Gas Monitoring Plan
Figure 8.2 Landscape Character Area Plan
Figure 8.3 Landscape Resource Plan
Figure 8.4 Visually Sensitive Receiver Plan
Figure 8.7 View of VSR3 (Sheet 1 of 2)
Figure 8.7a View of VSR3 (Sheet 2 of 2)
Figure 8.8 View of VSR4 (Sheet 1 of 3)
Figure 8.8a View of VSR4 (Sheet 2 of 3)
Figure 8.8b View of VSR4 (Sheet 3 of 3)
Figure 8.9 View of VSR5 (Sheet 1 of 2)
Figure 8.9a View of VSR5 (Sheet 2 of 2)
Figure 8.10 View of VSR6 (Sheet 1 of 2)
Figure 8.10a View of VSR6 (Sheet 2 of 2)
Figure 8.13 Tree Survey Boundary
Figure 9.1 Location of Cultural Heritage
Survey at WENT Landfill Extension
Figure 9.2 Location of Built Heritage
Figure 9.3 Geological Map of Study Area
Figure 9.4 1963 Map of the Study Area
Figure 9.5 Previous Achaeological
Works at Tsang Tsui Archaeological Site
Figure 9.6 Plan of Idendified Tsang Tsui Site and
Archaeological Study Area
Figure 9.7 Controal
Points for Archaeological Survey within Study Area
Figure 9.8 Distribution
of 2008 Archaeological Works at Tsang Tsui
Figure 9.9 Section Profiles of Test Pits T16
to T18
Figure 9.10 Section Profiles of Test Pits T19 to
T21
Figure 9.11 Section Profiles of Test Pits T22 to
T24
Figure 9.12 Section Profiles of Test Pits T25 to
T27
Figure 9.13 Section Profiles of Test Pits T28 to
T30
Figure 9.14 Revised Boundary of Tsang Tsui Archaeological Site
Figure 10.1 Study area, sites/features of
conservation importance and sampling locations for fauna
Figure 10.2 Habitat map and species of
conservation interest
Figure 10.3 Photos of habitats and species of
conservation interest
Figure 10.6 Sampling stations of the CPCC benthic
survey
Figure 10.7 Proposed site for translocation of
Pitcher Plant
Figure 10.8 Cross section of mitigation pond for
Little Grebe