Issue No. : Final
Issue Date : July 2015
Project No. : 1158
Environmental
Impact Assessment Report
for
Chai Wan Government Complex and Vehicle Depot
COMMERCIAL-IN-CONFIDENCE
Prepared By:
Allied Environmental Consultants Ltd.
This report has been prepared by Allied Environmental Consultants Limited
with all reasonable skill, care and diligence within the terms of the Agreement
with the client, incorporating our General Terms and Conditions of Business and
taking account of the resources devoted to it by agreement with the client.
We disclaim any responsibility to the client and others in respect of
any matters outside the scope of the above.
This report is confidential to the client and we accept no
responsibility of whatsoever nature to third parties to whom this report, or
any part thereof, is made known.
Any such party relies upon the report at their own risk.
Table of Contents
1.1. Background
1.2. The Assignment
1.3. Purpose and Objectives of this EIA Study
1.4. Approach to EIA Study
1.5. EIA Study Scope
1.6. Use of Relevant Studies
1.7. Structure of this Report
2. Need
of Project and Consideration of alternatives
2.1. Introduction
2.2. Need of the Project 2-1
2.3. Consideration of Alternatives
3.1. Description of the Site Area
3.2. Design of the Proposed Project
3.3. Operation of the
Proposed Project
3.4. Construction Methodology
3.5. Project Implementation Programme
3.6. Concurrent Projects. 3-11
3.7. Identification of Key Environmental Issues
3.8. Public Engagement
4. air
quality impact assessment
4.1. Introduction
4.2. Environmental Legislation, Standards and
Guidelines
4.3. Description of Existing Environment
4.4. Identification of Air Sensitive Receivers
4.5. Identification
of Potential Sources of
Impacts
4.6. List of Concurrent Projects
4.7. Assessment Methodology
4.8. Air Quality Impact Assessment
4.9. Cumulative Impacts. 4-23
4.10. Summary of the Mitigation Measures. 4-29
4.11. Residual Impacts
4.12. Environmental Monitoring and Audit
4.13. Conclusions
4.14. References
5.1. Introduction
5.2. Environmental Legislation,
Standards and Guidelines
5.3. Identification
of Noise Sensitive Receivers
5.4. Description of
the Existing Environment
5.5. Identification
of Potential Noise Sources
5.6. Assessment
Methodology
5.7. Prediction and
Evaluation of Noise Impact
5.8. Proposed
Mitigation Measures
5.9. Assessment of
Noise Impact with the Application of Mitigation Measures
5.10. Residual Impact
5.11. Environmental
Monitoring and Audit
5.12. Conclusion
6. water
quality and sewerage impact assessment
6.1. Introduction
6.2. Environmental Legislation, Standards and
Guidelines
6.3. Existing Environment 6-4
6.4. Water Sensitive Receivers
6.5. Assessment Methodology
6.6. Construction Phase Impact Assessment
6.7. Operation Phase Impact Assessment
6.8. Cumulative Impacts. 6-11
6.9. Mitigation Measures. 6-12
6.10. Residual Impacts
6.11. Environmental Monitoring and Audit
6.12. Conclusions
7. landscape
and visual impact assessment
7.1. Introduction
7.2. Environmental Legislation, Standards and
Guidelines
7.3. Planning and Development Control Framework
7.4. Assessment Methodology
7.5. Baseline Study
7.6. Landscape Impact Assessment
7.7. Visual Impact Assessment
7.8. Mitigation Measures. 7-37
7.9. Residual Impacts after Mitigation
7.10. Cumulative Impact
7.11. Environmental Monitoring and Audit
7.12. Conclusions
8. waste
management implication assessment
8.1. Introduction
8.2. Relevant Environmental Legislation,
Standards and Guidelines
8.3. Assessment Methodology
8.4. Identification and Evaluation of Environmental
Impacts
8.5. Mitigation Measures. 8-8
8.6. Residual Impacts
8.7. Environmental Monitoring and Audit
8.8. Conclusions
9. land
contamination assessment
9.1. Introduction
9.2. Relevant Environmental Legislation,
Standards and Guidelines
9.3. Description of the Environment
9.4. Assessment Methodology
9.5. Site Appraisal
9.6. Preventive Measures. 9-5
9.7. Residual Impacts
9.8. Environmental Monitoring and Audit
9.9. Conclusions
10.1. Introduction
10.2. Hazard Assessment Methodology
10.3. Review of Relevant Studies and Hazards
10.4. Hazard Identification
10.5. Frequency Assessment 10-41
10.6. Consequence Analysis. 10-60
10.7. Risk Assessment
10.8. Uncertainty Analysis. 10-91
10.9. Sensitivity Analysis. 10-91
10.10.Mitigation
Measures
10.11.Recommendations
10.12.Environmental
Monitoring and Audit
10.13.Conclusion
11.1. Introduction
11.2. Environmental / Social Benefits of the Proposed Project
11.3. Environmental
Friendly Design and Benefits
11.4. Estimated Population
and Environmentally Sensitive Areas Protected
11.5. Key
Environmental Problems Avoided/ Minimised
11.6. Compensation
Areas included
11.7. Environmental
Benefits of the Environmental Protection Measures
11.8. Air Quality
11.9. Noise
11.10.Water Quality
11.11.Landscape and Visual 11-6
11.12.Waste Management
Implication
11.13.Land
Contamination
11.14.Hazard to Life
11.15. Key Assessment
Assumptions, Limitations of Assessment Methodologies and Prior Agreements
12. environmental monitoring and audit
requirements
12.1. Introduction
12.2. EM&A Requirement 12-1
12.3. Air Quality
12.4. Noise
12.5. Water Quality
12.6. Landscape and Visual 12-4
12.7. Waste Management
12.8. Land Contamination. 12-5
12.9. Hazard to Life
13.1. Introduction
List of Tables
Table 2.1 Advantages and Disadvantages of Bored
Piling and Conventional Steel-H Piling
Table 3.1 Operation Hours of the Project
Table 3.2 Total Number of Staff Working in the
Proposed Project
Table 3.3 Summary of Vehicle Repair / Testing
Equipment and Activities
Table 3.4 List of Potential Concurrent Projects
Table 4.1 Hong Kong Air Quality Objectives
Table 4.2 Background Air Quality at Eastern Air
Quality Monitoring Station
Table 4.3 Representative Air Sensitive Receivers
Table 4.4 Vehicle Classification in EMFAC-HK
Table 4.5 Road Groupings
Table 4.6 Activity List Requiring Engine Running
Table 4.7 Total NOx Emission Inventory for Selected
Years
Table 4.8 Total PM10 Emission Inventory
for Selected Years
Table 4.9 Total PM2.5 Emission Inventory
for Selected Years
Table 4.10 Summary of NO2 Concentrations
Table 4.11 Summary of PM10 Concentrations
Table 4.12 Summary of PM2.5 Concentrations
Table 5.1 Noise Standards for Daytime Construction
Activities
Table 5.2 Area Sensitivity Ratings of NSRs
Table 5.3 ANLs for Fixed Plant Noise
Table 5.4 Road Traffic Noise Standards for Planning
Purposes
Table 5.5 Representative Existing and Planned NSRs
with the Corresponding NAPs
Table 5.6 Identified Area Sensitivity Ratings of NSRs
Table 5.7 Lowest Measured Prevailing Background Noise
Levels for NSRs and Fixed Plant Noise Assessment Criteria
Table 5.8 Identification of Noise Sources
Table 5.9 Anticipated Works of Planned THEi New
Campus
Table 5.10 Examination Schedule of Hong Kong Institute
of Vocational Education (Chai Wan) for Academic Year 2014 - 2015
Table 5.11 Predicted Construction Noise Levels at
Representative NAPs during Normal Daytime Working Hours due to the Project Only
for Unmitigated Scenario
Table 5.12 Predicted Cumulative Construction Noise Levels
at Representative NAPs during Normal Daytime Working Hours for the Unmitigated
Scenario
Table 5.13 Summary of Predicted Fixed Plant Noise
Levels at NAPs
Table 5.14 Maximum SWLs for Selected QPME
Table 5.15 Predicted Construction Noise Levels at
Representative NAPs under Mitigated Scenario due to the Project Only
Table 5.16 Predicted Cumulative Construction Noise
Level at Representative NAPs under Mitigated Scenario
Table 6.1 Summary of WQO for Eastern Buffer Water
Control Zone
Table 6.2 WSD Water Quality Standards at Flushing
Water Intakes
Table 6.3 Marine Water Quality for Eastern Buffer WCZ
in 2012
Table 6.4 Water Sensitive Receivers in Eastern Buffer
WCZ
Table 6.5 List of Potential Concurrent Projects
Table 7.1 Review of Existing Planning and Development
Control Framework
Table 7.2 Significance of Landscape and Visual Impact
Table 7.3 Summary of Existing LRs and their
Sensitivity and Amenity Values
Table 7.4 Summary of LCAs and their Sensitivity
Table 7.5 Tree Species Composition within Survey Area
Table 7.6 Summary of Proposed Action for Surveyed
Trees
Table 7.7 Identified VSRs and their Sensitivity to
Change
Table 7.8 Magnitude of Change of LRs and Significance
of Landscape Impacts during Construction and Operation Phase
Table 7.9 Magnitude of Change
for LCAs and Significance of Landscape Impacts during Construction and
Operation Phase
Table 7.10 Magnitude of Change for VSRs during
Construction and Operation Phase
Table 7.11 Significance of Visual Impacts during
Construction and Operation Phase
Table 8.1 Summary of C&D Materials Arising from
the Proposed Project
Table 8.2 Summary of Chemical Waste Arising from the
Proposed Project
Table 9.1 Summary of Historical and Current Land Uses
Table 10.1 List of Potential Hazardous Source
Table 10.2 Details of Sinopec HK Oil Terminal Chai Wan
Table 10.3 Details of Sinopec and ExxonMobil
Petrol-cum-LPG Filling Station
Table 10.4 Operation Data of NWFB and Citybus Depots
Table 10.5 Dangerous Goods License of NWFB Depot
Table 10.6 Dangerous Goods and Planned Quantities
Table 10.7 Temporal Changes in Population
Table 10.8 Population Data
Table 10.9 Daytime Weather Condition
Table 10.10 Nighttime Weather Condition
Table 10.11 Summary of Incidents Related to Oil
Terminal and Jetty (1980-2012)
Table 10.12 Summary of Incidents Related to Overfilling
Vessels (1980-2012)
Table 10.13 Summary of Incidents Related to LPG
Cylinder and LPG Wagon Parking Site (1980-2012)
Table 10.14 Summary of Incidents Related to Diesel
Storage (1980-2012)
Table 10.15 Summary of Incidents Related to Warehouse
(1980-2012)
Table 10.16 Summary of Hazardous Scenarios in PAFF EIA
Table 10.17 Failure cases for LPG Cylinder in Sinopec
HK Oil Terminal Chai Wan
Table 10.18 Failure cases for Fuel Oil Filling in
Sinopec HK Oil Terminal Chai Wan
Table 10.19 Summary of Smoke Dispersion Results of Oil
Terminal Bund Fire
Table 10.20 Summary of Carbon Monoxide Effects of Oil
Terminal Bund Fire
Table 10.21 Summary of Hazardous Scenarios for
Petrol-cum-LPG Filling Station
Table 10.22 Consequences for Release Scenarios at
Petrol-cum-LPG Filing Station
Table 10.23 Consequences for Release Scenarios at LPG
Wagon Parking Site
Table 10.24 Summary of Hazardous Scenarios for Diesel
Storage in Bus Depot
Table 10.25 Summary of Smoke Dispersion Results of
Diesel Tanker Release
Table 10.26 Summary of Carbon Monoxide Effects of
Diesel Tanker Release
Table 10.27 Summary of HAZID Workshops
Table 10.28 Release Scenarios to Be Considered
Table 10.29 Ignition Probabilities from Cox, Less and
Ang
Table 10.30 Base Failure Frequencies of Hazardous
Events for LPG Cylinder Releases (Sinopec HK Oil Terminal Chai Wan)
Table 10.31 Base Failure Frequencies of Hazardous
Events for Bulk Filling Operations (Sinopec HK Oil Terminal Chai Wan)
Table 10.32 Failure of Safety Provisions
Table 10.33 Base Failure Frequencies of Hazardous
Events (Petrol-cum-LPG Filling Stations)
Table 10.34 Escalation Failure Frequencies of Petrol
Road Tanker Due to LPG Explosion
Table 10.35 Base Failure Frequencies of Hazardous
Events (LPG Wagon Site)
Table 10.36 Frequencies of Release from Diesel Road
Tanker
Table 10.37 Aircraft Crash Frequency
Table 10.38 Aircraft Impact Frequency
Table 10.39 Background Helicopter Crash Frequencies
Table 10.40 Road Traffic Accidents by Severity (2008 -
2012)
Table 10.41 F-N Data for Construction Phase
Table 10.42 F-N Data for Operation Phase
Table 10.43 PLL Values for Construction Phase
Table 10.44 PLL Values for Operation phase
Table 10.45 FN Data and PLL for Sensitive Analysis
Table 12.1 Summary of EM&A requirements
Table 13.1 Environmental Mitigation Implementation
Schedule for the proposed Project
List of Figures
Site Location
Plan |
|
Location Plan of
Alternative Site |
|
Preliminary
Floor Plans |
|
Locations of Representative
Air Sensitive Receivers |
|
PATH Grid |
|
Locations of
Volume Sources from Travelling/ Idling Vehicles within Depot |
|
Contours of
Cumulative Annual NO2 Concentrations at 1.5 m above Ground |
|
Contours of
Cumulative 19th Highest 1-hour NO2 Concentrations at 1.5 m above
Ground |
|
Contours of
Cumulative Annual PM10 Concentrations at 1.5 m above Ground |
|
Contours of
Cumulative 10th Highest 24-hours PM10 Concentrations at 1.5 m above
Ground |
|
Contours of
Cumulative Annual PM2.5 Concentrations at 1.5 m above Ground |
|
Contours of
Cumulative 10th Highest 24-hours PM2.5 Concentrations at 1.5 m
above Ground |
|
Locations of
Representative Noise Sensitive Receivers and Noise Assessment Points |
|
Locations of
Background Noise Measurements |
|
Locations of
Notional Sources Position for Construction Phase |
|
Locations of Key
Noise Sources within the Depot |
|
Sectional
Drawing showing the Shielding Effects |
|
Locations of
Water Sensitive Receivers |
|
Proposed
Sewerage Layout Plan |
|
Preliminary
Layout for Drainage System |
|
Baseline Landscape
Resources |
|
Baseline
Landscape Character Areas |
|
Tree Recommendation
Plan |
|
Visual Envelops |
|
Key Visual
Characters & Resources |
|
Visual Sensitive
Receivers and Key View Points |
|
Photomontage |
|
Potential
Landscape Impact |
|
Potential Visual
Impact |
|
Preliminary
Compensatory Planting Plan |
|
Sample Colour and
Material of the Proposed Building |
|
Preliminary
Master Landscape Plan |
|
Preliminary
Master Landscape Plan and Visual Sensitive Receivers |
|
Proposed
Transportation Routes of Dump Trucks |
|
Aerial
Photograph Review |
|
Locations of the
Project Site and Hazardous Sources under this Study |
|
Societal Risk
Guideline |
|
Hazard
Assessment Methodology |
|
Population Group
and Study Area Considered |
|
Layout Plan of
Sinopec Chai Wan (Ex-CRC) Oil Terminal |
|
Filling Point
Protection at the LPG Filling Station |
|
Event Trees for
Cold Catastrophic Failure of Marine Vessel Fuel Tank (Sinopec HK Oil
Terminal) |
|
Event Trees for
Instantaneous Single Tank Failure (Sinopec HK Oil Terminal) |
|
Event Trees for
Catastrophic and Partial Failure of LPG Cylinder (Sinopec HK Oil Terminal) |
|
Event Trees for Catastrophic
and Partial Failure of Fuel Oil Road Tanker (Sinopec HK Oil Terminal) |
|
Event Trees for
Guillotine Failure of Loading Arm, Flexible Hose and Pump Connecting Pipeline
(Sinopec HK Oil Terminal) |
|
Event Trees for
Guillotine Failure Jetty Loading Hose, Fixed Pipeline and Catastrophic
Rupture of Dye Marker Tank |
|
Event Trees for
Catastrophic and Partial Failure of LPG Vessel |
|
Event Trees for
Catastrophic and Partial Failure of LPG Tanker |
|
Event Trees for
Guillotine Failure and Leak of Aboveground Pipe of Petrol Cum LPG Station |
|
Event Trees for
Failure of Dispenser, Flexible Hose to Vehicle and Guillotine Failure of
Underground Pipe and Submersible Pump Flange |
|
Event Trees for
Leak of Underground Supply Line |
|
Event Trees for
Catastrophic and Partial Failure of Petrol Road Tanker |
|
Event Trees for
Cold Catastrophic and Partial Failure of LPG Cylinder (LPG Wagon Site) |
|
Event Trees for
Cold Catastrophic and Partial Failure of Kerosene Tanker (LPG Wagon Site) |
|
Event Trees for
Rupture and Leak of Diesel Road Tanker (Bus Depot) |
|
Individual Risk
Contours of Sinopec HK Oil Terminal Chai Wan |
|
Individual Risk Contours
of ExxonMobil Petrol cum LPG Filling Station |
|
Individual Risk
Contours of Sinopec Petrol cum LPG Filling Station |
|
Individual Risk
Contours of LPG Wagon Parking Site |
|
Individual Risk Contours
of New World First Bus Permanent Depot |
|
Individual Risk
Contours of Citybus Chai Wan Bus Depot |
|
Overall
Individual Risk Contours |
|
F-N Curves of
Sinopec HK Oil Terminal Chai Wan in Construction Phase |
|
F-N Curves of
ExxonMobil Petrol cum LPG Filling Station in Construction Phase |
|
F-N Curves of Sinopec
Petrol cum LPG Filling Station in Construction Phase |
|
F-N Curves of New
World First Bus Permanent Depot in Construction Phase |
|
F-N Curves of
Citybus Chai Wan Bus Depot in Construction Phase |
|
F-N Curves of LPG
Wagon Parking Site in Construction Phase |
|
F-N Curves of
Sinopec HK Oil Terminal Chai Wan in Operation Phase |
|
F-N Curves of
ExxonMobil Petrol cum LPG Filling Station in Operation Phase |
|
F-N Curves of
Sinopec Petrol cum LPG Filling Station in Operation Phase |
|
F-N Curves of New
World First Bus Permanent Depot in Operation Phase |
|
F-N Curves of
Citybus Chai Wan Bus Depot in Operation Phase |
|
F-N Curves of LPG
Wagon Parking Site in Operation Phase |
|
F-N Curves of Cumulative
Risk by All Hazardous Installations in Operation Phase |
|
F-N Curves of
Increase Number of Construction Worker in Construction Phase for Sensitivity
Analysis |
|
F-N Curves of
Increase Number of Project Worker in Operation Phase for Sensitivity Analysis |
List of Appendices
Preliminary
Construction Programme |
|
Photos of
Proposed Activities |
|
Photos of
Representative Air Sensitive Receivers |
|
Meteorological
Data from Hong Kong Observatory |
|
Calculation of
Emission Factors for CALINE 4 |
|
Calculation of
Emission Factors of Travelling Vehicles within the Proposed Project for ISCST
3 |
|
Calculation of
Emission Factors of Idling Vehicles within the Proposed Project for ISCST 3 |
|
List of Chemical
Emissions from Government Laboratory |
|
Photos of
Representative Existing Noise Sensitive Receivers |
|
Results of
Prevailing Background Noise Surveys |
|
TD Endorsement
Letter, Summary of Estimated Road Traffic Generation (Ingress and Egress) and
Suggested Routing from the Proposed Project |
|
Location Plan
Showing the Area of Island Eastern Corridor with Low Noise Road Surface |
|
Detailed
Calculation of Construction Noise Impact Assessment and Construction Plant
Inventory (Unmitigated Scenario) |
|
Detailed
Calculation of Fixed Plant Noise Impact Assessment |
|
Result Summary
of Traffic Noise Impact Assessment |
|
Detailed
Calculation of Construction Noise Impact Assessment and Construction Plant
Inventory (Mitigated Scenario) |
|
Methodology and
Noise Measurement Results of Noise emitted by Brake Test Strip |
|
Hydraulic
Assessment |
|
Tree Assessment
Schedule |
|
Correspondence
with Local Authorities on Record Request |
|
Relevant Ground
Investigation Records |
|
Site Walkover
Checklist |
|
On-site Storage
Location of Diesel in the Past |
|
Site Photos of
Current Land Use Activities |
|
Traffic Data |
|
MTR Train
Population (Between Hang Fa Chuen and Chai Wan Station) |
|
HAZID Workshop
Meeting Minutes and Worksheets |
|
Fault Trees for
Exxon Mobil and Sinopec Petrol cum LPF Filling Stations, Sinopec HK Oil
Terminal Chai Wan and LPG Wagon Parking Site |
|
Fault Trees for
Diesel Refilling in Bus Depots |
|
Illustration of
Falls and U-Channels of the Oil Terminal |
|
Documentation of Key Assessment Assumptions,
Limitation of Assessment Methodologies and Related Prior Agreement(s) with
Director |