TABLE OF CONTENTS
1.1 Background
1.2 The Assignment
1.3 Objectives of the EIA Study
1.4 Structure of the EIA Report
2.
consideration of alternatives
2.1 Introduction
2.2 Alignment Option Review and
Selection
2.3 Construction Alternatives
3.1 Scope of the Project
3.2 Northern Section in Tuen Mun
3.3 Sub-sea Tunnel
3.4 Southern Section at HKBCF /
3.5 Works Areas
3.6 Sewage and Drainage
3.7 Project Programme
3.8 Concurrent Projects
3.9 Traffic Data and Assumptions
3.10 Environmental Conditions in the Absence of
the Project
4.1 Environmental Legislation and
Guidelines
4.2 Existing Air Quality
4.3 Identification of Air Sensitive
Receivers
4.4 Identification of Potential Air
Quality Impacts
4.5 Concurrent Projects
4.6 Construction Phase Assessment
Methodology
4.7 Operational Phase Assessment
Methodology
4.8 Construction Air Quality
Assessment
4.9 Operational Air Quality
Assessment
4.10 Residual Impacts
4.11 Environmental Monitoring and Audit
4.12 References
5.1 Environmental Legislation and
Guidelines
5.2 Identification of Noise
Sensitive Receivers
5.3 Baseline Conditions
5.4 Identification of Potential
Noise Impacts
5.5 Concurrent Projects
5.6 Assessment Methodology
5.7 Construction Noise Impact
Assessment
5.8 Operational Noise Impact
Assessment
5.9 Mitigation Measures
5.10 Residual Impacts
5.11 Environmental Monitoring and Audit
6.1 Introduction
6.2 Environmental Legislation
6.3 Existing Environment
6.4 Assessment Criteria
6.5 Key Issues
6.6 Concurrent Projects
6.7 Assessment Methodology
6.8 Operational Phase Assessment
6.9 Construction Phase Assessment
6.10 Mitigation Measures
6.11 Residual Impacts
6.12 Cumulative Impacts
6.13 Model Sensitivity Test
6.14 Environmental Monitoring and Audit
6.15 References
7.1 Introduction
7.2 Environmental Legislation
7.3 Key Ecological Sensitive Receivers
7.4 Ecological Baseline
7.5 Literature Review
7.6 Scope of Field Surveys
7.7 Field Survey Methodologies
7.8 Field Survey Results
7.9 Evaluation of Ecological
Importance
7.10 Ecological Impact Assessment Methodology
7.11 Construction Phase Impact Assessment
7.12 Operation Phase Impact Assessment
7.13 Mitigation Measures
7.14 Residual Impacts
7.15 Cumulative Impacts
7.16 Ecological Monitoring and Audit
Requirements
7.17 References
8.1 Background
8.2 Environmental Legislation
8.3 Key Ecological Sensitive
Receivers
8.4 Objectives of the Ecological
Impact Assessment
8.5 Ecological Baseline
8.6 Literature Review
8.7 Scope of Field Surveys
8.8 Field Survey Methodologies
8.9 Field Survey Results
8.10 Impact Assessment Methodology
8.11 Prediction and Evaluation of Construction
Phase Impacts
8.12 Prediction and Evaluation of Operational
Phase Impact
8.13 Summary of Impacts Evaluation
8.14 Mitigation Measures
8.15 Enhancement Measures
8.16 Residual Impacts for TM-CLKL
8.17 Cumulative Impacts
8.18 Ecological Monitoring and Audit
Requirements
8.19 References
9.1 Background
9.2 Relevant Legislation
9.3 Baseline Conditions
9.4 Key Issues
9.5 Impact Evaluation
9.6 Mitigation Measures
9.7 Cumulative Impacts
9.8 Residual Impacts
9.9 Environmental Monitoring and
Audit
9.10 References
10.1 Introduction
10.2 Environmental Legislation, Standards and
Guidelines
10.3 Assessment Methodology
10.4 Scope and Content of the Study
10.5 Review of Planning and Development Control
Framework
10.6 Baseline Study
10.7 Landscape Impact Assessment
10.8 Visual Impact Assessment
10.9 Mitigation Measures
10.10 Residual Impacts
10.11 Conclusion
11.
Cultural Heritage IMPACT Assessment
11.1 Project Background
11.2 Environmental Legislation
11.3 Objectives of the Cultural Heritage Impact
Assessment
11.4 Assessment Methodology
11.5 Terrestrial Archaeology Impact Assessment
11.6 Built Heritage Impact Assessment
11.7 Marine Archaeological Impact Assessment
11.8 Mitigation Measures
11.9 Residual Impacts
11.10 Environmental Monitoring and Audit Requirements
11.11 References
12.1 Introduction
12.2 Environmental Legislation and Standards
12.3 Assessment Methodology
12.4 Construction Phase Waste Management
Assessment
12.5 Operational Phase Waste Management
Assessment
12.6 Mitigation Measures
12.7 Waste Disposal Recommendations
12.8 Residual Impacts
12.9 Monitoring and Audit Requirements
13.1 Background
13.2 Environmental Legislation and Standards
13.3 Assessment Methodology
13.4 Survey Findings
13.5 Impact Assessment
13.6 Mitigation Measures
13.7 Residual Impacts
13.8 Environmental Monitoring and Audit
14.1 Background
14.2 The Assignment
14.3 Purpose and Structure of Section
14.4 Environmental Legislation, Policies, Plans,
Standards and Criteria
14.5 History and General Description of the
14.6 Potential Landfill Gas Hazards
14.7 Landfill Gas Hazard Assessment Criteria and
Methodology
14.8 Source
14.9 Pathway
14.10 Target
14.11 Assessment of Potential Risk
14.12 Recommended Protection Measures
14.13 Conclusions
15.
ENVIRONMENTAL MONITORING AND AUDIT
15.1 Introduction
15.2 EM&A Requirements
15.3 EM&A Responsibilities
15.4 Reporting
15.5 Implementation Schedules
16.
SUMMARY OF ENVIRONMENTAL OUTCOMES
16.1 Overview
16.2 Alignment Selection
16.3 Integrated Protection Measures
16.4 Mitigation and Enhancement Measures
16.5 Summary of Key Findings and Recommendations
APPENICES
Figures
Figure 2.1 Previous Alignment Options for TM-CLKL
Figure 2.2 Previous Short-Listed Alignment Options for TM-CLKL
Figure 2.3 Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities – Tentative
Figure 2.4 Overview of Northern Connection Options
Figure 2.5 Southern Connection Options S1 – Viaduct
Figure 2.5a Southern Connection Option S1A – Tunnel
Figure 2.6 Overview of Main Crossing Options
Figure 3.1 General Layout of TM-CLKL
Figure 3.2a Layout Plan of Northern Landfall
Figure 3.2b Layout Plan of Southern Landfall
Figure 3.3a Northern Landfall – General Layout
Figure 3.3b Northern Landfall – Section B - B
Figure 3.3c Northern Landfall – Section D - D
Figure 3.4a Northern Viaduct Connection, Slip Roads and Toll Plaza
Figure 3.4b Traffic Flows at Toll Plaza
Figure 3.5a Geological Section (Sheet 1 of 3)
Figure 3.5b Geological Section (Sheet 2 of 3)
Figure 3.5c Geological Section (Sheet 3 of 3)
Figure 3.6a Southern Landfall – General Layout
Figure 3.6b Southern Landfall – Section A - A
Figure 3.6c Southern Landfall – Section C - C
Figure 3.7 Southern Viaduct Connection and Slip Roads
Figure 3.8a Proposed Works Areas for TM-CLKL (Tuen Mun Side)
Figure 3.8b Proposed Works Areas for TM-CLKL (Lantau Side)
Figure 3.9a Indicative Construction Programme in Tuen Mun
Figure 3.9b Indicative Construction Programme in North Lantau
Figure 3.9c Portions of Works in Tuen Mun
Figure 3.9d Portions of Works in North Lantau
Figure 4.1 Site Layout Plan of TM-CLKL
Figure 4.2 Representative Air Sensitive Receivers (Sheet 1 of 3)
Figure 4.3 Representative Air Sensitive Receivers (Sheet 2 of 3)
Figure 4.4 Representative Air Sensitive Receivers (Sheet 3 of 3)
Figure 4.6 Potential Emission Sources of Concurrent Projects
Figure 4.7 Classification of Road Types
Figure 4.8 Location of Nearby Core Stations
Figure 4.9 Location of MM5 Meteorological Data
Figure 4.10a Hourly Averaged TSP Concentraction at 1.5M above Ground Level at Lantau for Scenario 1
Figure 4.10b 24 Hour Averaged TSP Concentration at 1.5M above Ground Level at Lantau for Scenario 1
Figure 4.10c Annual Averaged TSP Concentration at 1.5M above Ground Level at Lantau for Scenario 1
Figure 4.10d Hourly Averaged TSP Concentration at 1.5M above Ground Level at Tuen Mun for Scenario 1
Figure 4.10f Annual Averaged TSP Concentration at 1.5M above Ground Level at Tuen Mun for Scenario 1
Figure 4.11a Hourly Averaged TSP Concentration at 1.5M above Ground Level at Lantau for Scenario 2
Figure 4.11b 24 Hour Averaged TSP Concentration at 1.5M above Ground Level at Lantau for Scenario 2
Figure 4.11c Annual Averaged TSP Concentration at 1.5M above Ground Level at Lantau for Scenario 2
Figure 4.11d Hourly Averaged TSP Concentration at 1.5M above Ground Level at Tuen Mun for Scenario 2
Figure 4.11f Annual Averaged TSP Concentration at 1.5M above Ground Level at Tuen Mun for Scenario 2
Figure 4.12a Hourly Averaged NO2 Concentration at 1.5M above Ground Level at Lantau
Figure 4.12b Hourly Averaged NO2 Concentration at 1.5M above Ground Level at Tuen Mun
Figure 4.13a Daily Averaged NO2 Concentration at 1.5M above Ground Level at Lantau
Figure 4.13b Daily Averaged NO2 Concentration at 1.5M above Ground Level at Tuen Mun
Figure 4.13c Daily Averaged RSP Concentration at 1.5M above Ground Level at Lantau
Figure 4.13d Daily Averaged RSP Concentration at 1.5M above Ground Level at Tuen Mun
Figure 4.14a Annual Averaged NO2 Concentration at 1.5M above Ground Level at Lantau
Figure 4.14b Annual Averaged NO2 Concentration at 1.5M above Ground Level at Tuen Mun
Figure 4.14c Annual Averaged RSP Concentration at 1.5M above Ground Level at Lantau
Figure 4.14d Annual Averaged RSP Concentration at 1.5M above Ground Level at Tuen Mun
Figure 5.1 Representative Noise Sensitive Receivers
Figure 5.2 Proposed Layout Plan of Southern Connection – Key Plan
Figure 5.3 Indicative Construction Programme in North Lantau (Sheet 1 of 2)
Figure 5.4 Indicative Constrcution Programme in North Lantau (Sheet 2 of 2)
Figure 5.5 Representative Existing NSR Identified at Pak Mong Village
Figure 5.6 Proposed Noise Mitigation Measure
Figure 6.1 Location Plan for TM-CLKL, HKBCF and HKLR
Figure 6.2e Overall Programme for TM-CLKL + HKBCF + HKLR – Daily No. of Plant Trips (Sequence A)
Figure 6.2g Overall Programme for TM-CLKL + HKBCF + HKLR – Daily No. of Plant Trips (Sequence B)
Figure
6.5a Management
Frameworks for Dredged/Excavated Sediment
Figure 6.5b Location of Water Quality Model Output Points and Associated EPD Stations
Figure 6.6 Key Area of Seabed Disturbance
Figure 6.7 Location of Water Quality and Ecological Sensitive Receivers
Figure 6.9 Sediment Sampling Locations for TM-CLKL, HZMB and others (Indicative)
Figure 6.10 Coverage of Western Harbour Model
Figure 6.11 Comparison of Original and Refined Model Grids
Figure
6.12a Assumed Ultimate
Coastline when TMCLKL + HKBCF + HKLR is completed (2026)
Figure 6.13 Main Flow Channel in Western Harbour
Figure 6.14 Indicative Location of Box Culverts for Discharges of Storm Waters from TM-CLKL
Figure 6.15 Predicted 2026 Wet Season Salinity Profiles at WSR 27 and WSR 43
Figure 7.2b Stream and Tributaries Surveyed Between September 2003 to May 2004 Under HZMB Study
Figure 7.5a Key Plan of Habitat Map within Study Area
Figure 7.5b Habitat Map of Tai Ho Wan, North Lantau
Figure 7.5c Habitat Map of Tai Ho Wan, North Lantau
Figure 7.5d Habitat Map of Tai Ho Wan, North Lantau
Figure 7.5e Habitat Map of Pillar Point, Tuen Mun
Figure 7.5f Habitat Map of Pillar Point, Tuen Mun
Figure 7.6b Location of Species of Conservation Interest Recorded in Tuen Mun between 2003 to 2009
Figure 7.7 Photographs of Faunal Species of Conservation Interest Present within the Study Area
Figure 7.8a Photographs of Habitats Present within the Study Area
Figure 7.8b Photographs of Habitats Present within the Study Area
Figure 7.9 Photographs of Floral Species of Conservation Interest Present within the Study Area
Figure 7.10 Streams and Tributaries in North Lantau
Figure 8.1a Key Marine Ecological Sensitive Receivers Around the Study Area
Figure 8.1b Sighting Density of Chinese White Dolphin in waters around Lantau Island during 2002-08
Figure 8.1c Habitat Map – Coastline along North Lantau
Figure 8.1d Habitat Map – Coastline along Tuen Mun
Figure 8.4b Location of Coral Surveys Under HZMB Study
Figure 8.5b Survey Stations for Coral (Spot Dive and REA) Survey Under TM-CLKL Study (2008-2009)
Figure 8.6 Intertidal Survey Locations at Pillar Point Under TMWB Study (2008-2009)
Figure 8.7 Sampling Locations under HKLR Verification Survey for Ecological Baseline
Figure 8.8 Sampling Locations under HKLR Supplementary Ecological Survey
Figure 8.9 Locations of Hard and Soft Coral Surveyed Under TM-CLKL Coral Study (2008-2009)
Figure 9.1 Distribution of Key Fisheries Sensitive Receivers
Figure 9.2 Distribution of Fisheries Production
Figure 9.3 Distribution of Fishing Operations
Figure 9.4 Distribution of Overall Fisheries Production
Figure 9.17 Premanently and Temporarily Affected Marine Areas
Figure 10.1 Landscape and Visual Impact Study Area
Figure 10.1.1 Review of Planning Framework Plan (Sheet 1 of 2)
Figure 10.1.2 Review of Planning Framework Plan (Sheet 2 of 2)
Figure 10.2.1.1 Baseline Landscape Resources with Development Proposal Overlaid (Sheet 1 of 5)
Figure 10.2.1.2 Baseline Landscape Resources with Development Proposal Overlaid (Sheet 2 of 5)
Figure 10.2.1.3 Baseline Landscape Resources with Development Proposal Overlaid (Sheet 3 of 5)
Figure 10.2.1.4 Baseline Landscape Resources with Development Proposal Overlaid (Sheet 4 of 5)
Figure 10.2.1.5 Baseline Landscape Resources with Development Proposal Overlaid (Sheet 5 of 5)
Figure 10.2.1A Baseline Landscape Resources Photos (Sheet 1 of 4)
Figure 10.2.1B Baseline Landscape Resources Photos (Sheet 2 of 4)
Figure 10.2.1C Baseline Landscape Resources Photos (Sheet 3 of 4)
Figure 10.2.1D Baseline Landscape Resources Photos (Sheet 4 of 4)
Figure 10.2.2.1 Broadbrush Tree Survey Plan (Sheet 1 of 2)
Figure 10.2.2.2 Broadbrush Tree Survey Plan (Sheet 2 of 2)
Figure 10.3.1.1 Baseline Landscape Character Areas with Development Proposal Overlaid (Sheet 1 of 5)
Figure 10.3.1.2 Baseline Landscape Character Areas with Development Proposal Overlaid (Sheet 2 of 5)
Figure 10.3.1.3 Baseline Landscape Character Areas with Development Proposal Overlaid (Sheet 3 of 5)
Figure 10.3.1.4 Baseline Landscape Character Areas with Development Proposal Overlaid (Sheet 4 of 5)
Figure 10.3.1.5 Baseline Landscape Character Areas with Development Proposal Overlaid (Sheet 5 of 5)
Figure 10.3.1A Baseline Landscape Character Areas Photos (Sheet 1 of 2)
Figure 10.3.1B Baseline Landscape Character Areas Photos (Sheet 2 of 2)
Figure 10.4.1.A Baseline Key VSRs Photo at Local Level (Sheet 1 of 9)
Figure 10.4.1.B Baseline Key VSRs Photo at Local Level (Sheet 2 of 9)
Figure 10.4.1.C Baseline Key VSRs Photo at Local Level (Sheet 3 of 9)
Figure 10.4.1.D Baseline Key VSRs Photo at Local Level (Sheet 4 of 9)
Figure 10.4.1.E Baseline Key VSRs Photo at Local Level (Sheet 5 of 9)
Figure 10.4.1.F Baseline Key VSRs Photo at Local Level (Sheet 6 of 9)
Figure 10.4.1.G Baseline Key VSRs Photo at Local Level (Sheet 7 of 9)
Figure 10.4.1.H Baseline Key VSRs Photo at Local Level (Sheet 8 of 9)
Figure 10.4.1.I Baseline Key VSRs Photo at Local Level (Sheet 9 of 9)
Figure 10.4.1J Baseline Viewpoints from VSRs at Local Level (Sheet 1 of 3)
Figure 10.4.1K Baseline Viewpoints from VSRs at Local Level (Sheet 2 of 3)
Figure 10.4.1L Baseline Viewpoints from VSRs at Local Level (Sheet 3 of 3)
Figure 10.4.2.A Baseline Key VSRs Photo at Strategic and District Level (Sheet 1 of 2)
Figure 10.4.2.B Baseline Key VSRs Photo at Strategic and District Level (Sheet 2 of 2)
Figure 10.4.2.C Baseline Viewpoints From VSRs at Strategic and District Level (Sheet 1 of 2)
Figure 10.4.2.D Baseline Viewpoints From VSRs at Strategic and District Level (Sheet 2 of 2)
Figure 10.5.1 Key Plan of Section
Figure 10.7 Key Plan of Photomontage and Model View Viewpoints
Figure 10.7.1 View Point Location Plan of Photo No. G01
Figure 10.7.1A View Point No. G01 Photomontage from Tuen Mun Promenade
Figure 10.7.2 View Point Location Plan of Photo No. G02
Figure 10.7.2A View Point No. G02 Photomontage from Butterfly Beach (Sheet 1 of 2)
Figure 10.7.2B View Point No. G02 Photomontage from Butterfly Beach (Sheet 2 of 2)
Figure 10.7.3 View Point Location Plan of Photo No. G03
Figure 10.7.3A View Point No. G03 Photomontage from Golden Beach
Figure 10.7.4 View Point Location Plan of Photo No. G04
Figure 10.7.4A View Point No. G04 Photomontage from Tung Chung Cable Car
Figure 10.7.5 View Point Location Plan of Photo No. G05
Figure 10.7.5A View Point No. G05 Photomontage from Tung Chung Residential Area (Sheet 1 of 2)
Figure 10.7.5B View Point No. G05 Photomontage from Tung Chung Residential Area (Sheet 2 of 2)
Figure 10.7.6 View Point Location Plan of Photo No. G06
Figure 10.7.6A View Point No. G06 Photomontage from Asia World Expo (Sheet 1 of 2)
Figure 10.7.6B View Point No. G06 Photomontage from Asia World Expo (Sheet 2 of 2)
Figure 10.7.7 View Point Location Plan of Photo No. G07
Figure 10.7.8 View Point Location Plan of Photo No. G08
Figure 10.7.8A View Point No. G08 Photomontage from Villages of Tai Ho
Figure 10.7.9 View Point Location Plan of Photo No. G09
Figure 10.7.9A View Point No. G09 Photomontage from Siu Ho Wan Railway Depot
Figure 10.7.10 View Point Location Plan of Photo No. G10
Figure 10.7.10A View Point No. G10 Photomontage from Planed Theme Park / Major Recreational Uses
Figure 10.7.11 View Point Location Plan of Photo No. G11
Figure 10.7.11A View Point No. G11 Photomontage from Planned lantau Logistics Park
Figure 10.8.1 Aesthetic Design Treatment on Viaduct (Sheet 1 of 2)
Figure 10.8.2 Aesthetic Design Treatment on Viaduct (Sheet 2 of 2)
Figure 10.9.1 Landscape Plan (Sheet 1 of 13)
Figure 10.9.2 Landscape Plan (Sheet 2 of 13)
Figure 10.9.3 Landscape Plan (Sheet 3 of 13)
Figure 10.9.4 Landscape Plan (Sheet 4 of 13)
Figure 10.9.5 Landscape Plan (Sheet 5 of 13)
Figure 10.9.6 Landscape Plan (Sheet 6 of 13)
Figure 10.9.7 Landscape Plan (Sheet 7 of 13)
Figure 10.9.8 Landscape Plan (Sheet 8 of 13)
Figure 10.9.9 Landscape Plan (Sheet 9 of 13)
Figure 10.9.10 Landscape Plan (Sheet 10 of 13)
Figure 10.9.11 Landscape Plan (Sheet 11 of 13)
Figure 10.9.12 Landscape Plan (Sheet 12 of 13)
Figure 10.9.13 Landscape Plan (Sheet 13 of 13)
Figure 11.1 The Geology and Topography Map in Northern Landing Area
Figure 11.1a Location of Northern Landing
Figure 11.1b Location of Southern Landing
Figure 11.2a Archaeological Map (1905-1909)
Figure 11.2b The Geology and Topography Map in Northern Landing Area
Figure 11.2c Section of the 1866 Map PF the San on District Showing the Project Study Area
Figure 11.2d 1896 Map of Hong Kong Showing the Project Study Area
Figure 11.3a Potential Archaeological Area in the Project Area
Figure 11.3b Areas of Archaeological Potential Relative to the Project Layout
Figure 11.4a Location of Heritage Features at Tuen Mun Side
Figure 11.4b Retaining Walls Arrangement at Existing Grave
Figure 11.5 Location of Heritage Features at North Lantau Side
Figure 11.6 1856 French Chart Canal Nord Du Lantau
Figure 11.7 British Admiralty Chart 1878
Figure 11.8 British Admiralty Chart 1889
Figure 11.9 1819 San on Yuen Cartogram from the Directory of San on County
Figure11.10 Images of Maritihe Activity in the Vicinity of Tung Chung
Figure 11.11 Images of Tung Chung Walled City and Shek She Fort
Figure 11.12 Identification of Data Gap and Area Requiring Mai Survey
Figure 11.13 Side Scan Sonar Data Showing Sonar Contacts SC003, SC004 & SC005
Figure 11.14 Location of Sonar Contact
Figure 11.15 Side Scan Sonar Data Showing Sonar Contacts TH_4 & 5
Figure 11.16 Key Areas of Seabed Disturbance
Figure 11.17a Utility Location Plan (Sheet 1 of 2)
Figure 11.17b Utility Location Plan (Sheet 2 of 2)
Figure 12.1 Demarcation of Sediment Type
Figure 13.2 Geological Plan (Sheet 1 of 3)
Figure 13.3 Geological Plan (Sheet 2 of 3)
Figure 13.4 Geological Plan (Sheet 3 of 3)
Figure 13.5 Vertical Alignment of Proposed Subsea Tunnel (Sheet 1 of 3)
Figure 13.6 Vertical Alignment of Proposed Subsea Tunnel (Sheet 2 of 3)
Figure 13.7 Vertical Alignment of Proposed Subsea Tunnel (Sheet 3 of 3)
Figure 13.8 Location of Northern Landing
Figure 13.9 Location of Southern Landing
Figure 13.10 Location of Works Area 4
Figure 13.11 Location of Works Area 5
Figure 13.12 Location of Works Area 6
Figure 13.13 Location of Works Area 23
Figure 13.14 Location of Works Area 18 & 19
Figure 13.15 Historic Photographs at Northern Landing
Figure 13.16 Historic Photographs at Southern Landing
Figure 13.17 Historic Photographs at Works Area 4
Figure 13.18 Historic Photographs at Works Area 5
Figure 13.19 Historic Photographs at Works Area 6
Figure 13.20 Historic Photographs at Works Area 23
Figure 13.21 Interface between Pillar Point Valley Landfill & Toll Plaza
Figure 14.1 Location of Pillar Point Valley Landfill
Figure 14.2 Landfill Gas Monitoring Locations
Figure 14.3 Ground Water Monitoring Locations
Figure 14.5 Vertical Profile of The Toll Plaza and Road Networks
Figure 14.8 Passive Trench Vent (Outline)
Figure 14.9 Typical Design of Remote Cut-off Trench Barrier
Figure 14.10 Open Conduit Protection by Water Seal (Longitudinal-section)
Figure 14.11 Vented Manhole (Cross-section)
Figure 14.12 Typical Detail of Collar Seal (Cross-section)
Figure 14.13 Above Ground Service Entry
Figure 14.14 Vented Gas Interceptor Cavity (Cross-section)