Agreement No. CE 87/2001 (CE)
FURTHER
DEVELOPMENT OF TSEUNG KWAN O
FEASIBILITY STUDY
Environmental Impact
Assessment
Volume 1 (Text)
LIST OF CONTENTS
1.1 Project Background
1.2 Objective and Scope of the EIA Study
1.3 Consideration of Environmental Impact Assessment Ordinance
1.4 EIA Study Area
1.5 Relevant Approved EIA Reports and Studies
1.6 Approach of the EIA Report
1.7 Structure of the EIA Report
2.1 Site Location
2.2 Project Requirements, Scope and Benefits
2.3 Consideration of Alternatives and Development of Preferred Option
2.4 Conceptual Plan and Proposed Development Option
2.5 Construction Methods and Engineering Requirements
2.6 Operation of the Project
2.7 Project Programme
2.8 Concurrent Projects
3.1 Introduction
3.2 Environmental Legislation, Policies, Plans, Standards and Criteria
3.3 Description of the Environment
3.4 Air Sensitive Receivers
3.5 Identification of Pollutant Sources
3.6 Assessment Methodology
3.7 Identification, Prediction and Evaluation of Air Quality Impacts
3.8 Mitigation Measures
3.9 Residual Environmental Impact
3.10 Environmental Monitoring and Audit Requirements
4.1 Introduction
4.2 Environmental Legislation, Policies, Plans, Standards and Criteria
4.3 Description of the Environment
4.4 Noise Sensitive Receivers
4.5 Assessment Methodology
4.6 Overview of Relevant Studies
4.7 Identification of Environmental Impacts
4.8 Prediction and Evaluation of Environmental Impacts
4.9 Mitigation of Adverse Environmental Impacts
4.10 Evaluation of Residual Impacts
4.11 Environmental Monitoring and Audit
5. HYDRODYNAMICS AND WATER QUALITY IMPACTS
5.1 Introduction
5.2 Environmental Legislation, Policies, Plans, Standards and Criteria
5.3 Description of the Environment
5.4 Water Sensitive Receivers
5.5 Assessment Methodology
5.6 Identification of Environmental Impact
5.7 Prediction and Evaluation of Environmental Impacts
5.8 Mitigation of Adverse Environmental Impacts
5.9 Evaluation of Residual Impacts
5.10 Environmental Monitoring and Audit
6 SEWERAGE
AND SEWAGE TREATMENT
6.1 Introduction
6.2 Sewerage Catchment Area, Development and Flow Projections
6.3 Existing & Committed Sewerage Infrastructure
6.4 Sewerage Impact Assessment
6.5 Recommended works
6.6 Summary
7.1 Introduction
7.2 Environmental Legislation, Policies, Plans, Standards and Criteria
7.3 Assessment Methodology
7.4 Description of the Environment
7.5 Ecological Value
7.6 Identification of Environmental Impacts
7.7 Evaluation of Environmental Impacts
7.8 Mitigation of Adverse Environmental Impacts
7.9 Evaluation of Residual Impacts
7.10 Environmental Monitoring and Audit
8.1 Introduction
8.2 Environmental Legislation, Policies, Plans, Standards and Criteria
8.3 Assessment Methodology
8.4 Description of the Environment
8.5 Ecological Value
8.6 Identification of Environmental Impacts
8.7 Prediction and Evaluation of Environmental Impacts
8.8 Mitigation of Adverse Environmental Impacts
8.9 Evaluation of Residual Impacts
8.10 Environmental Monitoring and Audit
9.1 Introduction
9.2 Environmental Legislation, Standards and Guidelines
9.3 Assessment Methodology
9.4 Description of the Environment
9.5 Environmental Impact Identification, Prediction and Evaluation
9.6 Mitigation of Adverse Environmental Impacts
9.7 Evaluation of Residual Impacts
9.8 Environmental Monitoring and Audit
10. LANDSCAPE
AND VISUAL IMPACTS
10.1 Introduction
10.2 Environmental Legislation and Guidelines
10.3 Scope and Content of the Study
10.4 Planning and Development Control Framework
10.5 Comments on Landscape and Visual Issues Received during Previous Consultations
10.6 Baseline Study
10.7 Landscape Impact Assessment
10.8 Visual Impact Assessment
10.9 Conclusions
11. WASTE
MANAGEMENT IMPLICATIONS
11.1 Introduction
11.2 Environmental Legislation, Policies, Plans, Standards and Criteria
11.3 Assessment Methodology
11.4 Baseline Conditions
11.5 Identification and Evaluation of Environmental Impacts
11.6 Mitigation of Adverse Environmental Impacts
11.7 Evaluation of Residual Impacts
11.8 Environmental Monitoring and Audit
12.1 Introduction
12.2 Calculation of Potential Gas Emissions
12.3 Evaluation of Significance of Potential Gas Emissions
12.4 Conclusion
13.1 Introduction
13.2 Environmental Legislation and Standards
13.3 Assessment Methodology
13.4 Baseline Condition
13.5 Identification and Evaluation of Potential Cultural Heritage Impacts
13.6 Mitigation of Adverse Impacts
13.7 Residual Environmental Impact
13.8 Environmental Monitoring and Audit Requirements
14.1 Introduction
14.2 Government Legislation and Standards
14.3 Description of the Environment
14.4 Assessment Methodology
14.5 Qualitative Source-Pathway-Target Analysis
14.6 Site Categorisation
14.7 Recommended Precautionary Measures for Construction Phase and Operational Phase
15.1 Introduction
15.2 Environmental Legislations, Policies, Plans, Standards and Criteria
15.3 Previous Assessment for Hazard to Life of Proposed DGVFP
15.4 Hazard to Life Assessment
15.5 Conclusions and Recommendations
16. ENVIRONMENTAL
MONITORING AND AUDIT
16.1 Introduction
16.2 Air Quality Impact
16.3 Noise Impact
16.4 Water Quality Impact
16.5 Terrestrial Ecology
16.6 Marine Ecology
16.7 Fisheries Impact
16.8 Landscape and Visual Impact
16.9 Waste Management Implications
16.10 Impact on Cultural Heritage
16.11 Landfill Gas Hazard Assessment
17. CONCLUSION
AND RECOMMENDATIONS
17.1 Introduction
17.2 Air Quality Impact
17.3 Noise Impact
17.4 Water Quality Impact
17.5 Sewerage and Sewage Treatment Implications
17.6 Terrestrial Ecology
17.7 Marine Ecology
17.8 Fisheries Impact
17.9 Landscape and Visual Impact
17.10 Waste Management Implications
17.11 Biogas Assessment
17.12 Impact on Cultural Heritage
17.13 Landfill Gas Hazard Assessment
17.14 Hazard to Life
17.15 Overall Conclusion
18 IMPLEMENTATION SCHEDULE OF PROPOSED
MITIGATION MEASURES
Tables (no hyperlink provided.
please refer to the respective section)
Table 1.1 Schedule 2 Designated Projects Under
this Project
Table 2.1 Summary of Meetings/Consultations
During the CPI Process
Table 2.2 Summary of Public’s Views collected
during the CPI Process
Table 2.3 Summary of Evaluation Results for
Various Development Themes
Table 2.4 Comparison of Scheme 1 and Scheme 3 of
WCR Tunnel Alignment
Table 2.5 Concurrent Projects
Table 3.1 Hong Kong Air Quality Objectives
Table 3.2 Tunnel Air Quality Guidelines (TAQG)
Table 3.3 EPD Air Quality Monitoring Data at
Kwun Tong Station in 2001
Table 3.4 Representative Air Sensitive Receivers
in the vicinity of Work Sites during Construction Phase
Table 3.5 Representative Air Sensitive Receivers
in the vicinity of Kowloon Section of WCR during Operation Phase
Table 3.6 Representative Air Sensitive Receivers
in the vicinity of TKO Town Centre South during Operation Phase
Table 3.7 Emission Factors for Dusty
Construction Activities
Table 3.8 Queuing Forecast at EHC Toll Plaza
Table 3.9 Queuing Forecast at WCR Toll Plaza
Table 3.10 Vehicle Idling Emission Factors
Table 3.11 Background Air Pollutant Concentration
for Urban Development
Table 3.12 Predicted TSP Concentrations at
Representative Air Sensitive Receivers
Table 3.13 Emission Factors for Dusty Construction
Activities (With Mitigation Measures)
Table 3.14 Predicted TSP Concentrations at
Representative Air Sensitive Receivers (Mitigated)
Table 3.15 Design of Ventilation Building at the
eastern portal of WCR and Mid-Ventilation building.
Table 4.1 Construction Noise Criteria for
Activity other than Percussive Piling
Table 4.2 Acceptable Noise Levels for Percussive
Piling
Table 4.3 Permitted Hours of Operation for
Percussive Piling
Table 4.4 Acceptable Noise Level for Fixed Plant
Noise
Table 4.5 Summary of Representative Existing/
Planned Noise Sensitive Receivers for Construction Noise Impact Assessment
Table 4.6 Summary of Identified Existing/
Planned Noise Sensitive Receivers for Traffic Noise Impact Assessment
Table 4.7 Summary of Selected Noise Sensitive
Receivers for Fixed Noise Impact Assessment
Table 4.8 Summary of Construction Tasks and
Stages for TKO Further Development
Table 4.9 Summary of Equipments Installed at Ventilation Building and Pumping Station
Table 4.10 Unmitigated Construction Noise Levels
at Representative NSRs
Table 4.11 Unmitigated Traffic Noise Levels at
Representative NSRs in TKO Area in Year 2016
Table 4.12 Unmitigated Traffic Noise Levels at
Representative NSRs in Kowloon Area in Year 2031
Table 4.13 Unmitigated Traffic Noise Levels at
Representative NSRs in TKO Area in Year 2031
Table 4.14 Potential Noise Impact from Fixed Noise
Sources
Table 4.15 Predicted Mitigated Construction Noise
Levels at NSRs in Worst-Case Scenario (Using Quieter Plant)
Table 4.16 Predicted Mitigated Construction Noise
Levels at NSRs in Worst-Case Scenario (Quiet Plant + Movable Noise Barrier)
Table 4.17 Mitigated Traffic Noise Levels at
Representative NSRs in TKO Area in Year 2016
Table 4.18 Mitigated Traffic Noise Levels at
Representative NSRs in Kowloon Area in Year 2031
Table 4.19 Mitigated Traffic Noise Levels at
Representative NSRs in TKO Area in Year 2031
Table 4.20 Number of Non-compliant Dwellings and Classrooms
at TKO Area (Year 2016)
Table 4.21 Number of Non-compliant Dwellings and
Classrooms at Kowloon Area (Year 2031)
Table 4.22 Number of Non-compliant Dwellings and
Classrooms at TKO Area (Year 2031)
Table 5.1 Ultimate Population for TKO
Table 5.2 Summary of Water Quality Objectives
for Junk Bay WCZ
Table 5.3 Summary of Water Quality Objectives
for Victoria Harbour WCZ
Table 5.4 Summary of Water Quality Objectives
for Eastern Buffer WCZ
Table 5.5 WSD Standards at Sea Water Intakes
Table 5.6 Assessment Criterion for SS for Local
Marine Biota and Fisheries Resources
Table 5.7 Summary Statistics of 2002 and 2003
Marine Water Quality in Junk Bay WCZ
Table 5.8 Summary Statistics of 2002 and 2003
Marine Water Quality in Eastern Buffer WCZ
Table 5.9 Summary Statistics of 2002 and 2003
Marine Water Quality in Victoria Harbour WCZ
Table 5.10 Field Survey Results
Table 5.11 The Spacing and Cross Section of the
Bridge Piers
Table 5.12 Loss Coefficient for the Piers in the
Flow Direction Perpendicular to the Bridge Alignment
Table 5.13 Pollution Loading from Stonecutters
Sewage Treatment Works under HATS
Table 5.14 Key Water Quality Modelling Parameters
Table 5.15 Key Parameters Selected for
Presentation
Table 5.16 Unit Flow Factors
Table 5.17 The Assumed Flow Rate and Quality of
Emergency Discharges
Table 5.18 Fill Volumes (with Phase II and Phase
III Seawalls founded on Deep Cement Mixing Columns)
Table 5.18a Sediment Analysis Results from Marine
Ground Investigation Works under IETKO and this Study
Table 5.18b Elutriate Test Results from Marine Ground
Investigation Works under Feasibility Study for IETKO and this Study
Table 5.19 Sediment Loss Rate for Filling During
the Phase I Seawall Construction
Table 5.20 Scenario for Sediment Plume Modelling
Table 5.21 Predicted Water Quality at EDC for Dry
Season (Operational Phase)
Table 5.22 Predicted Water Quality at EDC for Wet
Season (Operational Phase)
Table 5.23 Predicted Water Quality at Selected
Indicator Points for Dry Season (Operational Phase)
Table 5.24 Predicted Water Quality at Selected
Indicator Points for Wet Season (Operational Phase)
Table 5.25 Predicted Water Quality at Selected
Cooling Water Intakes and Saltwater Intakes for Dry Season (Operational Phase)
Table 5.26 Predicted Water Quality at Selected
Cooling Water Intakes and Saltwater Intakes for Wet Season (Operational Phase)
Table 5.27 Predicted Water Quality at Fish Culture
Zones under Scenario 3b
Table 5.28a Summary of E.coli Impacts Due to Sewage
Bypass
Table 5.28b Predicted Water Quality During Emergency
Bypass (Operational Phase)
Table 5.28c Depth-averaged and Surface SS
concentrations near the Reclamation Site
Table 5.29 Predicted Water Quality at Selected
Indicator Points for Dry Season (Construction Phase)
Table 5.30 Predicted Water Quality at Selected
Indicator Points for Wet Season (Construction Phase)
Table 5.31 Predicted Water Quality at Selected
Cooling Water Intakes and Saltwater Intakes for Dry Season (Construction Phase)
Table 5.32 Predicted Water Quality at Selected
Cooling Water Intakes and Saltwater Intakes for Wet Season (Construction Phase)
Table 5.33 Predicted Metal Elevations at Selected
Indicated Points for Dry Season (Construction Phase)
Table 5.34 Predicted Metal Elevations at Selected
Indicated Points for Wet Season (Construction Phase)
Table 5.35 Predicted Metal Elevations at Selected
Cooling Water Intakes and Saltwater Intakes for Dry Season (Construction Phase)
Table 5.36 Predicted Metal Elevations at Selected
Cooling Water Intakes and Saltwater Intakes for Wet Season (Construction Phase)
Table 6.1 Ultimate Population in Year 2016 for
TKO Sewerage Catchment in Baseline Condition
Table 6.2 Proposed Changes in Population at TCS,
TKL and PSK in Year 2016
Table 6.3 Ultimate Population in Year 2016
Associated with Further Development Proposed at TCS, TKL and PSK for TKO
Sewerage Catchment
Table 6.4 Recommended Unit Flow Factors
Table 6.5 Ultimate ADWF in Year 2016 for TKO
Sewerage Catchment
Table 6.6 Proposed Changes in ADWF at TCS, TKL
and PSK in Year 2016
Table 6.7 Ultimate ADWF in Year 2016 for TKO
Sewerage Catchment, with Further Development at TCS, TKL and PSK and TKO Stage
1 Landfill
Table 6.8 Recommended Peaking Factors for Sewers
and PTWs
Table 6.9 Ultimate PWWF in Year 2016 at TKO PTW
Table 6.10 Ultimate PWWF in Year 2016, with Revised
Flows Due to Further Development at TCS, TKL and PSK, and TKO Stage 1 Landfill,
at TKO PTW
Table 6.11 TKO PTW Treatment Unit Capacities
Table 6.12 HATs Stage I Tunnel System Capacity
Table 6.13 Summary of Surcharged Sewers under Peak
Flows at Baseline Condition
Table 6.14 Summary of Surcharged Sewers under 1.15
X Peak Flows at Baseline Condition
Table 6.15 Existing Sewers With Adverse Gradient
Table 6.16 Summary of Surcharged Sewers at Peak
Flow under SIA Condition
Table 6.17 Summary of Surcharged Sewers At 1.15 X
Peak Flow under SIA Condition
Table 6.18 Summary of Recommended Sewerage
Upgrading Works
Table 6.19 Summary of Recommended Sewerage
Upgrading Works
Table 7.1a Ecological Value of Secondary Woodland
and Mixed Woodland in the Assessment Areas
Table 7.1b Ecological Value of Disturbed Woodland
and Grassland/Shrubland in the Assessment Areas
Table 7.1c Ecological Value of Disturbed Grassland
and Plantation in the Assessment Areas
Table 7.1d Ecological Value of Orchard And
Village/Orchard in the Assessment Areas
Table 7.1e Ecological Value of Streams in the
Assessment Areas
Table 7.1f Ecological Value of Abandoned
Agriculture and Wasteland/Developed Areas in the Assessment Areas
Table 7.2 Species of Conservation Interest
Recorded in the Assessment Areas
Table 7.3 Direct Habitat Loss Resulting from
Proposed Works.
Table 7.4a Overall Impact Evaluation: Secondary
Woodland and Mixed Woodland
Table 7.4b Overall Impact Evaluation: Disturbed
Woodland and Grassland/ Shrubland
Table 7.4c Overall Impact Evaluation: Disturbed
Grassland and Plantation
Table 7.4d Overall Impact Evaluation: Orchard and
Village/Orchard
Table 7.4e Overall Impact Evaluation: Streams
Table 7.4f Overall Impact Evaluation: Abandoned
Agriculture and Wasteland/ Developed Areas
Table 7.5 Summary of Potential Impacts to
Species of Conservation Interest
Table 8.1 Composition and abundance (no. of
individuals/ percentage cover per 0.25m2) of rocky shore biota at Transect 1 at
the Chui Keng Wan coast on 19th May 2004 and 19th October 2004.
Table 8.2 Composition and abundance (no. of
individuals/ percentage cover per 0.25m2) of rocky shore biota at Transect 2 at
the Chui Keng Wan coast on 19th May 2004 and 19th October 2004.
Table 8.3 Summary of Rapid Ecological Assessment
dive survey results.
Table 8.4 Summary Information on Coral Species
recorded in Junk Bay
Table 8.5 Summary of benthic survey results.
Table 8.6 Composition and abundance of the soft
substrata benthic community in grab samples collected from Chui Keng Wan, Junk
Bay on 1 September 2004.
Table 8.7a Ecological Value of natural rocky shore
and artificial seawall habitats
Table 8.7b Ecological Value of sandy shore habitat
and hard substrata subtidal habitat
Table 8.7c Ecological Value of soft substrata
subtidal and marine mammal habitats
Table 8.8 Species of Conservation Interest
within Assessment Area
Table 8.9 Overall Impact Evaluation for Rocky
Shore Habitat
Table 8.10 Overall Impact Evaluation for Sandy
Shore Habitat
Table 8.11 Overall Impact Evaluation for
Artificial Seawall Habitat
Table 8.12 Overall Impact Evaluation for Hard
Substrata Subtidal Habitat
Table 8.13 Overall Impact Evaluation for Hard
Substrata Subtidal Habitat
Table 8.14 Overall Impact Evaluation for Marine
Mammal Habitat
Table 9.1 Recent Hong Kong Capture Fisheries
Industry Figures
Table 9.2 Recent Hong Kong Fish Culture Industry
Figures
Table 10.3.1 Relationship Between Receptor Sensitivity
And Impact Magnitude In Defining Impact Significance
Table 10.5.1 Comments and Responses Relating to
Landscape and Visual Issues from Public Consultation Stage 1
Table 10.5.2 Comments and Responses Relating to
Landscape and Visual Issues from Public Consultation Stage 2
Table 10.5.3 Comments and Responses Relating to Landscape
and Visual Issues from Public Consultation Stage 3
Table 10.6.1 List of Existing Visually Sensitive
Receivers (VSRs)
Table 10.6.2 List of Planned Visually Sensitive
Receivers (VSRs)
Table 10.7.1.1 Proposed Construction Phase Landscape and
Visual Mitigation Measures (Schedule 3 Project)
Table 10.7.1.2 Proposed Operation Phase Landscape and Visual
Mitigation Measures (Schedule 3 Project)
Table 10.7.1.3 Significance of Landscape Impacts in
Construction and Operation Phases for Schedule 3 Project (Adverse Impacts
unless otherwise stated)
Table 10.7.2.1 Proposed Construction Phase Landscape and
Visual Mitigation Measures (Western Coast Road DP1)
Table 10.7.2.2 Proposed Operation Phase Landscape and Visual
Mitigation Measures (Western Coast Road DP1)
Table 10.7.2.3 Significance of Landscape Impacts in
Construction and Operation Phases for Western Coast Road DP1 (Adverse Impacts
unless otherwise stated)
Table 10.7.3.1 Proposed Construction Phase Landscape and
Visual Mitigation Measures (Cross Bay Link DP2)
Table 10.7.3.2 Proposed Operation Phase Landscape and Visual
Mitigation Measures (Cross Bay Link DP2)
Table 10.7.3.3 Significance of Landscape Impacts in
Construction and Operation Phases for Cross Bay Link DP2 (Adverse Impacts
unless otherwise stated)
Table 10.7.4.1 Proposed Construction Phase Landscape and
Visual Mitigation Measures (Road P2 & Road D4 Flyover DP3)
Table 10.7.4.2 Proposed Operation Phase Landscape and Visual
Mitigation Measures (Road P2 & Road D4 Flyover DP3)
Table 10.7.4.3 Significance of Landscape Impacts in
Construction and Operation Phases for Road P2 & Road D4 Flyover DP3
(Adverse Impacts unless otherwise stated)
Table 10.8.1 Significance of Visual Impacts in the
Construction and Operation Phases for Schedule 3 Project (Note: All impacts
adverse unless otherwise noted)
Table 10.8.2 Significance of Visual Impacts in the
Construction and Operation Phases for Western Coast Road DP1 (Note: All impacts
adverse unless otherwise noted)
Table 10.8.3 Significance of Visual Impacts in the
Construction and Operation Phases for Cross Bay Link DP2 (Note: All impacts
adverse unless otherwise noted)
Table 10.8.4 Significance of Visual Impacts in the
Construction and Operation Phases for Road P2 & Road D4 Flyover DP3 (Note:
All impacts adverse unless otherwise noted)
Table 11.1 Sediment Quality Criteria For The
Classification Of Sediment
Table 11.2 Sediment Analysis Results From Marine
Ground Investigation Works Under Feasibility Study For IETKO
Table 11.3 Sediment Analysis Results From Marine
Ground Investigation Works under the Project
Table 11.4 Summary of C&D Material Volumes
Table 11.5 Estimated Domestic Waste Arising (2016)
in TKO Further Development
Table 11.6 Summary of Waste Handling Procedures
and Disposal Routes
Table 12.1 Calculation of Methane Flux from the
WCR Reclamation
Table 13.1 Proximity of Notable Buildings and
Structures to the Worksites
Table 14.1 Qualitative Source-Pathway-Target
Analysis Of Proposed Development In Proximity To Tseung Kwan O Stage I Landfill
Table 14.2 Qualitative Source-Pathway-Target
Analysis Of Proposed Development In Proximity To Tseung Kwan O Stage II/III
Landfill
Table 14.3 Qualitative Source-Pathway-Target
Analysis Of Proposed Development In Proximity To Sai Tso Wan Landfill
Table 14.4 Actions In The Event Of Gas Being
Detected In Excavations
Table 14.5 Actions In The Event Of Gas Being
Detected During Operational Phase
Table 15.1 Traffic Flow/Road Population Close to
the Proposed DGVFP Estimated in the Previous Assessment
Table 18.1 Implementation Schedule For Air Quality
Control
Table 18.2 Implementation Schedule For Noise
Control
Table 18.3 Implementation Schedule For Water
Quality Control
Table 18.5 Implementation Schedule For Terrestrial
Ecological Impact
Table 18.6 Implementation Schedule For Marine
Ecological Impact
Table 18.7 Implementation Schedule For Fisheries
Table 18.8 Implementation Schedule For Landscape
And Visual Impact
Table 18.9 Implementation Schedule For Waste
Management Implications
Table 18.10 Implementation Schedule For Cultural
Heritage
Table 18.11 Implementation Schedule For Landfill Gas
Hazard
