Tuen Mun Bypass
Environmental
Impact Assessment
Contents
1. Introduction
1.2 Description of the Project
1.3 EIA Study Brief
1.5 Objectives of the EIA Study
1.6 Structure of this EIA Report
2.1 Purposes and
Objectives of the Project
2.3 Consideration of
“With” and “Without” Project Scenarios
2.4 Design Changes to the
Project
2.5 Consideration of
Alternatives / Options
2.6 Consideration of
Construction Methodologies
2.7 Tackling
Environmental Challenges
2.8 Preliminary Design
for the Project
2.9 Tentative
Construction Programme
2.10 Concurrent Projects
2.11 Collating
and Addressing Public Views
2.12 Summary of Key
Environmental Outcome
3.1 Legislation,
Standards, and Guidelines
3.2 Description
of the Environment
3.3 Representative
Air Sensitive Receivers
4.1 Legislation, Standards and Guidelines
4.3 Construction Noise Impact Assessment
4.4 Road Traffic Noise Impact Assessment
4.5 Fixed Noise Sources Impact Assessment
4.6 Environmental Monitoring and Audit
4.7 Conclusion 4-39
5.1 Legislations, Standards,
Guidelines and Criteria
5.3 Representative Water
Sensitive Receivers
5.4 Identification and
Evaluation of Water Quality Impacts – Construction Phase
5.5 Identification and
Evaluation of Water Quality Impacts – Operational Phase
5.6 Cumulative Impacts from Concurrent Projects 5-20
5.7 Recommended
Mitigation Measures – Construction Phase
5.8 Recommended
Mitigation Measures – Operational Phase
5.9 Residual
Impacts
5.10 Environmental Monitoring
and Audit (EM&A)
5.11 Conclusion
6. Waste
Management Implications
6.1 Legislation,
Standards and Guidelines
6.5 Environmental
Monitoring and Audit
6.6 Conclusion
7.1 Environmental
Legislation, Plans, Standards, and Guidelines
7.2 Assessment Area
7.4 Site Appraisal
7.5 Identification of
Potential Contaminated Area and Hot Spots
7.7 Selection of RBRG Land
Use Scenario and Chemical of Concern
(COCs)
7.9 Evaluation of
Environmental Impacts
7.10 Mitigation of Adverse
Environmental Impact
7.11 Evaluation of
Residual Environmental Impacts
7.12 Conclusion
8.1 Legislation, Standards
and Guidelines
8.3 Hazard to Life
Assessment Methodology
8.8 Risk Evaluation
8.9 ALARP Assessment
8.10 Conclusions
9.1 Legislation, Standards and
Guidelines
9.3 Landfill Gas Hazard
Assessment Criteria and Methodology
9.4 Nature of PPVL
9.5 Potential for the Project to
Intercept Landfill Gas
9.6 Sensitive
Targets for Landfill Gas Risk
9.7 Qualitative Assessment of
Risks due to Landfill Gas
9.8 General Hazards Related to
Landfill Gas
9.9 Recommendations
9.10 Environmental Monitoring
and Auditing
9.11 Conclusion
10. Ecological Impact (Terrestrial)
10.1 Legislation,
Standards and Guidelines
10.3 Literature Review
10.4 Ecological Field
Survey Methodology
10.5 Ecological Baseline
Conditions
10.6 Evaluation of
Habitats and Species
10.7 Impact Identification
and Prediction
10.8 Impact Evaluation
10.9 Cumulative Impacts
10.10 Mitigation Measures
10.11 Residual Impacts
10.12 Environmental
Monitoring and Audit (EM&A)
10.13 Conclusions
11. Landscape and Visual Impact
11.1 Introduction
11.2 Relevant Legislations
and Guidelines
11.4 Review of Planning and
Development Control Framework
11.7 Landscape Impact
Assessment
11.9 Landscape and Visual
Mitigation Measures
11.10 Residual Impact
11.11 Cumulative Impact
11.12 Summary and Conclusions
12.1 Legislation,
Standards and Guidelines
12.2 Assessment
Area
12.4 Baseline
Conditions
12.5 Cultural
Heritage Impact Assessment
12.6 Mitigation
Measures
12.7 Residual and
Cumulative Impacts
12.8 Environmental
Monitoring and Audit (EM&A)
12.9 Conclusion
12.10 Bibliography
13. Environmental Monitoring and Audit (EM&A) Requirements
13.1 Introduction
13.2 EM&A
Manual
13.3 EM&A
Programme
14. Summary of Environmental Outcomes
14.1 General
14.3 Environmental
Benefits of Environmental Protection Measures Recommended
14.4 Estimated
Population Protected from Various Environmental Impacts
14.5 Overall
Conclusion
15.1 General
15.2 Air Quality
15.3 Noise Impacts
15.4 Water Quality
15.5 Waste Management
Implications
15.6 Land
Contamination
15.7 Hazard to Life
15.8 Landfill Gas
Hazard
15.9 Ecological
Impact (Terrestrial)
15.10 Landscape and
Visual Impacts
15.11 Cultural
Heritage
Figures
Figure 1.1 Tuen
Mun Bypass General Layout Plan
Figure 2.1 Preliminary Alignment
Options – Option 1 & 2
Figure 2.2 Alignment Options
Figure 2.2a Alignment Options - Option
A1 and A2
Figure 2.2b Alignment Options - Option
B1, B2 and B3
Figure 2.2c Alignment Options - Option
C1, C2 and C3
Figure 2.3a Southern Interchange Options
– Option S1
Figure 2.3b Southern Interchange Options
– Option S2
Figure 2.3c Southern Interchange Options
– Option S3
Figure 2.4a Northern Portal Options –
Option N1
Figure 2.4b Northern Portal Options –
Option N2
Figure 2.4c Northern Portal Options –
Option N3
Figure 2.5 Middle Ventilation Building
Options
Figure 2.6 Southern Ventilation
Building Options
Figure 2.7 Northern Ventilation
Building Options
Figure 2.8 Tunnel Construction Method
Figure 2.9 Key Elements for the Project
Figure 2.10 Longitudinal Profile for the
Tuen Mun Bypass
Figure 2.11 Locations of the Concurrent
Project
Figure 3.1a Locations
of Concerned PATH Grids in Lam Tei
Figure 3.1b Locations
of Concerned PATH Grids in Pillar Point
Figure 3.1c Locations
of Concerned PATH Grids in Sam Shing
Figure 3.2a Locations
of Representative Air Sensitive Receivers in Lam Tei during Construction Phase
Figure 3.2b Locations
of Representative Air Sensitive Receivers in Pillar Point during Construction
Phase
Figure 3.2c Locations
of Representative Air Sensitive Receivers in Sam Shing during Construction
Phase
Figure 3.2d Locations
of Representative Air Sensitive Receivers in Siu Lam during Construction Phase
Figure 3.3a Locations
of Representative Air Sensitive Receivers in Lam Tei during Operational Phase
Figure 3.3b Locations
of Representative Air Sensitive Receivers in Pillar Point during Operational
Phase
Figure 3.3c Locations
of Representative Air Sensitive Receivers in Sam Shing during Operational Phase
Figure 3.4a Locations
of PTIs and Heavy Goods Vehicle/Coach Parking in Lam Tei
Figure 3.4b Locations
of Heavy Goods Vehicle/Coach Parking in Pillar Point
Figure 3.4c Locations
of PTIs in Sam Shing
Figure 3.5a Locations
of Chimney in Lam Tei
Figure 3.5b Locations
of Chimney and Marine Facility in Pillar Point
Figure 3.6a Contours
of Cumulative 19th highest 1-hour NO2 Concentration at 1.5m above Ground (Year
2048) in Lam Tei
Figure 3.6b Contours
of Cumulative 19th highest 1-hour NO2 Concentration at 1.5m above Ground (Year
2048) in Pillar Point
Figure 3.6c Contours
of Cumulative 19th highest 1-hour NO2 Concentration at 1.5m above Ground (Year
2048) in Sam Shing
Figure 3.7a Contours
of Cumulative Annual NO2 Concentration at 1.5m above Ground (Year 2048) in Lam
Tei
Figure 3.7b Contours
of Cumulative Annual NO2 Concentration at 1.5m above Ground (Year 2048) in
Pillar Point
Figure 3.7c Contours
of Cumulative Annual NO2 Concentration at 1.5m above Ground (Year 2048) in
Pillar Point (5m)
Figure 3.7d Contours
of Cumulative Annual NO2 Concentration at 1.5m above Ground (Year 2048) in
Pillar Point (10m)
Figure 3.7e Contours
of Cumulative Annual NO2 Concentration at 1.5m above Ground (Year 2048) in Sam
Shing
Figure 3.8a Contours
of Cumulative 10th highest 24-hour RSP Concentration at 1.5m above Ground (Year
2048) in Lam Tei
Figure 3.8b Contours
of Cumulative 10th highest 24-hour RSP Concentration at 1.5m above Ground (Year
2048) in Pillar Point
Figure 3.8c Contours
of Cumulative 10th highest 24-hour RSP Concentration at 1.5m above Ground (Year
2048) in Sam Shing
Figure 3.9a Contours
of Cumulative Annual RSP Concentration at 1.5m above Ground (Year 2048) in Lam
Tei
Figure 3.9b Contours
of Cumulative Annual RSP Concentration at 1.5m above Ground (Year 2048) in
Pillar Point
Figure 3.9c Contours
of Cumulative Annual RSP Concentration at 1.5m above Ground (Year 2048) in Sam
Shing
Figure 3.10a Contours
of Cumulative 19th highest 24-hour FSP Concentration at 1.5m above Ground (Year 2048) in Lam
Tei
Figure 3.10b Contours
of Cumulative 19th highest 24-hour FSP Concentration at 1.5m above Ground (Year
2048) in Pillar Point
Figure 3.10c Contours
of Cumulative 19th highest 24-hour FSP Concentration at 1.5m above Ground (Year
2048) in Sam Shing
Figure 3.11a Contours
of Cumulative Annual FSP Concentration at 1.5m above Ground (Year 2048) in Lam
Tei
Figure 3.11b Contours
of Cumulative Annual FSP Concentration at 1.5m above Ground (Year 2048) in
Pillar Point
Figure 3.11c Contours
of Cumulative Annual FSP Concentration at 1.5m above Ground (Year 2048) in Sam
Shing
Figure
4.1 Locations of Prevailing Noise Measurement
Figure
4.2 Locations of Noise Sensitive Receivers
Figure
4.3 Locations of Representative NSRs and NAPs for Construction Noise
Impact Assessment
Figure
4.4 Locations of Representative NSRs and NAPs for Road Traffic Noise
Impact Assessment
Figure
4.5 Locations of Representative NSRs and NAPs for Fixed Noise Sources
Impact Assessment
Figure 5.1 Water
Quality Impact Assessment Area and Water Sensitive Receivers
Figure 6.1 Facilities
for Storage, Collection and Transpiration of Waste
Figure 7.1 Tuen
Mun Bypass Project Alignment and Assessment Area
Figure 7.2 Potential
Contaminated Area
Figure 9.1 250m Consultation Zone of PPVL
Figure 9.2 Location of Landfill Gas and Groundwater Monitoring
Wells at PPVL
Figure 9.3 Geological Map
Figure 9.4 Location of the Proposed Facilities
Figure 10.1 Project
Site and Assessment Area
Figure 10.2 Site
of Conservation Importance
Figure 10.3 Previous
Study Area of Relevant EIAs
Figure 10.4 Species
of Conservation Importance from Literature Review within the Study Area
Figure 10.5 Habitat
and Species of Conservation Importance Recorded
Figure 10.5a Habitat
and Species of Conservation Importance Recorded (Sheet 1of 3)
Figure 10.5b Habitat
and Species of Conservation Importance Recorded (Sheet 2 of 3)
Figure 10.5c Habitat
and Species of Conservation Importance Recorded (Sheet 3 of 3)
Figure 10.6a Proposed
Stream Diversion Scheme (Sheet 1 of 3)
Figure 10.6b Proposed
Stream Diversion Scheme (Sheet 2 of 3)
Figure 10.6c Proposed
Stream Diversion Scheme (Sheet 3 of 3)
Figure 10.7a Potential
Receptor Site for Flora Transplantation (Diospyros vaccinioides)
Figure 10.7b Potential
Receptor Site for Flora Transplantation (Gnetum luofuense)
Figure 10.8 Potential
Receptor Site for Freshwater Crab
Figure 10.9 Potential
Location of Compensatory Woodland Planting Sites
Figure 11.1.1 Tuen
Mun Bypass General Layout Plan Key Plan
Figure 11.1.2 Tuen
Mun Bypass General Layout Plan (Sheet 1)
Figure 11.1.3 Tuen
Mun Bypass General Layout Plan (Sheet 2)
Figure 11.1.4 Tuen
Mun Bypass General Layout Plan (Sheet 3)
Figure 11.1.5 Tuen
Mun Bypass General Layout Plan (Sheet 4)
Figure 11.1.6 Tuen
Mun Bypass General Layout Plan (Sheet 5)
Figure 11.1.7 Tuen
Mun Bypass General Layout Plan (Sheet 6)
Figure 11.1.8 Tuen
Mun Bypass General Layout Plan (Sheet 7)
Figure 11.1.9 Tuen
Mun Bypass General Layout Plan (Sheet 8)
Figure 11.1.10 Tuen
Mun Bypass General Layout Plan (Sheet 9)
Figure 11.2.1 Outline
Zoning Plan (OZP)
Figure 11.3.1 Landscape
Resources (LR) – Key Plan
Figure 11.3.2 Landscape
Resources (LR) – Southern Interchange In Pillar Point
Figure 11.3.3 Landscape
Resources (LR) – Southern Interchange In Pillar Point
Figure 11.3.4 Landscape
Resources (LR) – Middle Ventilation Building
Figure 11.3.5 Landscape
Resources (LR) – Northern interchange in Lam Tei Quarry
Figure 11.3.6 Landscape
Resources (LR) – Northern Landfall
Figure 11.4.1 Landscape
Resources Photographs – Pillar Point
Figure 11.4.2 Landscape
Resources Photographs – Tuen Mun
Figure 11.4.3 Landscape
Resources Photographs – Lam Tei
Figure 11.4.4 Landscape
Resources Photographs – Lam Tei
Figure 11.4.5 Landscape
Resources Photographs – Northern Landfall
Figure 11.5.1 Landscape
Character Areas (LCAS) – Key Plan
Figure 11.5.2 Landscape
Character Area (LCAS) – Southern interchange in Pillar Point
Figure 11.5.3 Landscape
Character Area (LCAS) – Southern interchange in Pillar Point
Figure 11.5.4 Landscape
Character Area (LCAS) – Middle Ventilation Building
Figure 11.5.5 Landscape
Character Area (LCAS) – Northern interchange in Lam Tei Quarry
Figure 11.5.6 Landscape
Character Area (LCAS) – Northern Landfall
Figure 11.6.1 Landscape
Character Areas Photographs – Pillar Point
Figure 11.6.2 Landscape
Character Areas Photographs – Tuen Mun
Figure 11.6.3 Landscape
Character Areas Photographs – Lam Tei
Figure 11.6.4 Landscape
Character Areas Photographs – Northern Landfall
Figure 11.7.1 Visually
Sensitive Receivers – Tuen Mun, Pillar Point and North Lantau (Sheet 1)
Figure 11.7.2 Visually
Sensitive Receivers – Tuen Mun, Pillar Point and North Lantau (Sheet 2)
Figure 11.7.3 Visually
Sensitive Receivers – Lam Tei
Figure 11.8.1 Visually
Sensitive Receivers Photographs – Tuen Mun (TM) (Sheet 1)
Figure 11.8.2 Visually
Sensitive Receivers Photographs – Tuen Mun (TM) (Sheet 2)
Figure 11.8.3 Visually
Sensitive Receivers Photographs – Tuen Mun (TM) (Sheet 3)
Figure 11.8.4 Visually
Sensitive Receivers Photographs – Pillar Point (PP) (Sheet 1)
Figure 11.8.5 Visually
Sensitive Receivers Photographs – Pillar Point (PP) (Sheet 2)
Figure 11.8.6 Visually
Sensitive Receivers Photographs – North Lantau (NL)
Figure 11.9.1 Visually
Sensitive Receivers Photographs – Lam Tei (LT) (Sheet 1)
Figure 11.9.2 Visually
Sensitive Receivers Photographs – Lam Tei (LT) (Sheet 2)
Figure 11.10.1 Landscape
and Visual Mitigation Measures – Key Plan
Figure 11.10.2 Landscape
and Visual Mitigation Measures Plan Southern interchange in Pillar Point
Figure 11.10.3 Landscape
and Visual Mitigation Measures Plan Middle Ventilation Building
Figure 11.10.4 Landscape
and Visual Mitigation Measures Plan Northern interchange in Lam Tei Quarry
Figure 11.10.5 Landscape
and Visual Mitigation Measures Plan Northern Landfall
Figure 11.10.6 Artistic
Impression of Southern Ventilation Building in Tuen Mun West
Figure 11.10.7 Artistic
Impression of Middle Ventilation Building in Wah Fat Street in Tuen Mun
Figure 11.10.8 Artistic
Impression of Northern Ventilation Building in Lam Tei Quarry
Figure 11.11.1 Viewing
Points – Tuen Mun, Pillar Point and North Lantau (Sheet 1)
Figure 11.11.2 Viewing
Points – Tuen Mun, Pillar Point and North Lantau (Sheet 2)
Figure 11.11.3 Viewing
Points – Lam Tei
Figure 11.12.1 Photomontage
of VP-TM1 – Residents of Alpine Garden, Rainbow Garden, Kam Fai Garden, Harvest
Garden and Hoi Tak Garden
Figure 11.12.2 Photomontage
of VP-TM 2 – Residents of Seaview Garden
Figure 11.12.3 Photomontage
of VP-TM 3 – Residents of Pearl Island Garden
Figure 11.12.4 Photomontage
of VP-TM4 – Visitors at Tuen Mun Promenade
Figure 11.12.5 Photomontage
of VP-TM5 – Visitors at Hong Kong Gold Coast Dolphin Square
Figure 11.12.6 Photomontage
of VP-TM6 – Maritime Travelers To/From Tuen Mun Ferry Terminal
Figure 11.12.7 Photomontage
of VP-TM7 – Vehicle Travelers at Tuen Mun Road
Figure 11.12.8 Photomontage
of VP-TM11 – Hikers of Maclehose Trail Section 10
Figure 11.12.9 Photomontage
of VP-TM12 – Visitors of Sam Shing Temple in Castle Peak Road – Castle Peak Bay
Figure 11.13.1 Photomontage
of VP-PP1 – Vehicle Travelers at Lung Mun Road
Figure 11.13.2 Photomontage
of VP-PP2 – Workers at Emsd Tuen Mun Vehicle
Servicing Station and DSD Pillar Point STW
Figure 11.13.3 Photomontage
of VP-PP3 – Workers at River Trade Terminal
Figure 11.13.4 Photomontage
of VP-PP4 – Workers at Tuen Mun Area 40
Figure 11.14.1 Photomontage
of VP-NL2 – Travelers at Hong Kong Boundary Crossing Facilities
Figure 11.15.1 Photomontage
of VP-LT1 – Residents of Lo Fu Hang
Figure 11.15.2 Photomontage
of VP-LT2 – Vehicle Travelers on Yuen Long Highway (East Bound)
Figure 11.15.3 Photomontage
of VP-LT3 – Trail Walkers on Fu Tei Country Trail and Lam Tei Irrigation
Reservoir
Figure 11.15.4 Photomontage
of VP-LT5 – Recreational Users of Fuk Hang Tsuen Basketball Court
Figure 12.1 Cultural
Heritage Assessment Area
Figure 12.1a Cultural
Heritage Assessment Area (Sheet 1 of 3)
Figure 12.1b Cultural
Heritage Assessment Area (Sheet 2 of 3)
Figure 12.1c Cultural
Heritage Assessment Area (Sheet 3 of 3)
Figure 12.2a Geology
(Sheet 1 of 3)
Figure 12.2b Geology
(Sheet 2 of 3)
Figure 12.2c Geology
(Sheet 3 of 3)
Figure 12.3a Previous
Investigation (Shek Kok Tsui Sai)
Figure 12.3b Previous
Investigation (Shek Kok Tsui Sai)
Figure 12.3c Previous
Investigation (Fu Tei Ha Sai)
Appendices
Appendix 3.1 Tentative Location
of Key Construction Activities and Air Sensitive Uses
Appendix 3.2 Traffic Department
Endorsement on Traffic Data
Appendix 3.3 Traffic Forecast in
Year 2033, Year 2036, Year 2041, Year 2046 and Year 2048
Appendix 3.4 Estimation of Trips
for Roads with Start Emission in Year 2033, Year 2036, Year 2041, Year 2046 and
Year 2048
Appendix 3.5 Hourly Composite
Vehicular Emission Factor in Year 2033, Year 2036, Year 2041, Year 2046 and
Year 2048
Appendix 3.6 Emission Inventory
and Source Locations for Portal and Ventilation Building in Year 2048
Appendix 3.7 Emission Inventory
and Source Locations for PTIs and Heavy Goods Vehicle/Coach Parking
Appendix 3.8 Emission Inventory
and Source Locations for Industrial Emissions
Appendix 3.9 Marine Department’s
Reply on Marine Traffic Data
Appendix 3.10a Emission Inventory and
Source Locations for Marine Emission at River Trade Terminal in Year 2048
Appendix 3.10b Emission Inventory and
Source Locations for Marine Emission at Chu Kong Shipping Terminal in Year 2048
Appendix 3.10c Emission Inventory and
Source Locations for Marine Emission at Landing Area 40 in Year 2048
Appendix 3.11 Removal of Emission
for PATH rerun in Year 2030
Appendix 3.12 Jenkin Method for
Annual NOx to NO2 Conversion
Appendix 3.13 Detailed
Operational Air Quality Assessment Results
Appendix 4.1 Prevailing
Noise Measurement Results
Appendix 4.2 Photos
of Representative Noise Sensitive Receivers
Appendix 4.3 Review
on Typical Quieter Construction Methods
Appendix 4.4 Schematic
Drawing for Barrier and Full Enclosure
Appendix 4.5 Traffic
Data of Prevailing Year and Assessment Year
Appendix 4.6 Computer
Plot of Noise Model
Appendix 4.7 Locations
of Existing and Committed Noise Barriers
Appendix 4.8 Locations
of Existing and Committed LNRS
Appendix 4.9 Unmitigated
Road Traffic Noise Impacts
Appendix 4.10 Eligibility
Testing for Indirect Noise Mitigation Measures
Appendix 4.11 Area Sensitivity Ratings
Appendix 5.1 Baseline
Water Monitoring Results
Appendix 5.2 Concurrent
Projects
Appendix 5.3 Conditions for Working within Water Gathering Grounds
Appendix 7.1 Contamination Assessment Plan (CAP)
Appendix 8.1 EIA
Study Brief
Appendix 8.2 Magazine
Site Selection
Appendix 8.3 LPG
Installation at Tuen Mun Area 44 and Sam Shing Estate
Appendix 8.4 Population
Assumption and Population Data Adopted
Appendix 8.5 Geotechnical
Features Considered
Appendix 8.6 Fault
Trees for Use of Explosives
Appendix 8.7 Fault
Trees for Transportation of Explosives
Appendix 8.8 Individual
Risk due to Use, Overnight Storage and Transportation of Explosives
Appendix 8.9 Societal
Risk Plots
Appendix 9.1 Landfill Gas Monitoring Results of the
Perimeter Monitoring Wells at PPVL
Appendix 9.2 Groundwater Monitoring Results at PPVL
Appendix 9.3 Typical Designs for Precautionary and
Protection Measures for Design Phase
Appendix 10.1 Terrestrial
Transect and Aquatic Fauna Sampling Location
Appendix 10.3 Presence of Plant Species Recorded Within the Study Area
Appendix 10.4 Photographic Records of Species of Conservation Importance
Appendix 10.5 Presence of Mammal Species Recorded Within the Survey Area
Appendix 10.6 Maximum Count of Bird Species Recorded Within the Survey Area
Appendix 10.7 Maximum Count of Reptile Species Recorded Within Survey Area
Appendix 10.8 Relative Abundance of Amphibian Species Recorded Within Survey
Area
Appendix 10.9 Maximum Count of Butterfly Species Recorded within the Survey Area
Appendix 10.10 Maximum Count of Odonate Species Recorded within the
Survey Area
Appendix 10.11 Presence of Freshwater Fauna Recorded within the Survey Area
Appendix 11.1 Tree
Survey Report
Appendix 12.1 Details
of Identified Graded Historic Sites/ Buildings/ Structures
Appendix 12.2 Details
of Identified Built Heritage Items
Appendix 15.1 Key
Assessment Assumptions and Limitation of Assessment Methodologies
Appendix 15.2 Summary
of Environmental Impacts Associated with the Project