Agreement No. CE 7/2008 (EP)
Organic Waste Treatment Facilities,
Phase I – Feasibility Study
Environmental Impact Assessment Report
Contents
Project Background
Objectives of the EIA Study
Consideration of Environmental Impact Assessment
Ordinance
EIA Study Area
Structure of the EIA Report
2......... PROJECT DESCRIPTION
Purpose and Objective of the Project
Need for the Project
Consideration of Different Site Options
Outline of Project Elements
Consideration of Alternative Construction
Methods and Sequences of Works
Construction Programme
Interactions with Other Projects
Introduction
Environmental Legislation, Standards and
Guidelines
Description of the Environment
Air Sensitive Receivers
Potential Source of Impacts
Assessment Methodology
Prediction and Evaluation of Impacts
Recommended Air Quality Mitigation Measures
Evaluation of Residual Impacts
Environmental Monitoring and Audit
Conclusion
Introduction
Study Approach
Study Basis
Hazard Identification
Frequency Estimation
Consequence Analysis
Risk Summation
Risk Mitigation Measure Identification and
Analysis
Analysis of Mitigation Measures
Recommended Mitigation and Safety Measures
during Construction Phase
Recommended Safety Measures for Plant Design and
Operation
Mitigated Scenarios
Conclusion
References
Introduction
Environmental Legislation, Policies, Plans, Standards
and Criteria
Description of the Environment
Water Sensitive Receivers
Assessment Methodology
Identification of Environmental Impacts
Cumulative Water Quality Impact
Prediction and Evaluation of Environmental
Impacts
Mitigation Measures of Adverse Environmental
Impacts
Evaluation of Residual Impacts
Environmental Monitoring and Audit
Conclusion
Introduction
Environmental Legislation, Policies, Plans,
Standards and Criteria
Environmental Guidelines
Assessment Approach and Methodology
Identification of Environmental Impacts
Evaluation of Environmental Impacts during
Construction Phase
Evaluation of Waste Impacts for Operational
Phase
Mitigation of Adverse Environmental Impacts during
Construction Phase
Mitigation of Adverse Environmental Impacts
during Operation Phase
Impacts Caused by Handling, Collection and
Disposal of Waste
Contamination Preventive Measures
Approach to Prevent Land Contamination
Evaluation of Residual Impacts
Environmental Monitoring and Audit
Conclusion
7......... LANDSCAPE AND VISUAL
Introduction
Project Description
Environmental Legislation and Standards
Methodology of Assessment of Landscape Impacts
Methodology of Assessment of Visual Impacts
Baseline Study
Reviewing of Planning and Development Control
Framework
Landscape Resources (LRs)
Landscape Character Areas (LCAs)
Landscape Sensitivity
Tree Survey Results
Zone of Visual Influence (ZVI)
Visual Sensitive Receivers (VSRs)
Landscape Impact Assessment
Visual Impact Assessment
Conclusion
Introduction
Environmental Legislation, Policies, Plans,
Standards and Criteria
Description of the Environment
Identification of Environmental Impacts
Evaluation of Environmental Impacts
Mitigation of Adverse Environmental Impacts
Environmental Monitoring and Audit
Conclusion
9......... ENVIRONMENTAL MONITORING AND AUDIT
Introduction
Air Quality
Hazard to Life
Water Quality
Waste Management
Landscape and Visual
Noise
10........ CONCLUSIONS AND SUMMARY OF ENVIRONMENTAL OUTCOMES
Summary of EIA Findings
Overall Conclusion
11 IMPLEMENTATION SCHEDULE
AND RECOMMENDED MITIGATION MEASURES
List of Tables
Table 2.1 Summary of Assessment Results for
Site Selection
Table 2.2 Strengths and Weaknesses of Anaerobic
Digestion and Composting
Table 2.3 Construction Program
Table 2.4 Concurrent Projects
Table 3.1 Hong Kong Air Quality Objectives
Table 3.2 Reference Levels for HCl, HF and VOCs
Acute and Chronic Exposure
Table 3.3 Annual Average Concentrations of Air
Pollutants in the Latest Five Years (Year 2004 - 2008) at Tung Chung Air
Quality Monitoring Station
Table 3.4 Air Sensitive Receivers
Table 3.5 Standards to be Applied for the
Emission Level of Cogen Units
Table 3.6 Standards to be Applied to the
Emission Level of the Centralized Air Pollution Control Unit
Table 3.7 Emission Level of Centralized Air
Pollution Control Unit
Table 3.8 Emission Level of Cogen Units
Table 3.9 Emission Level of Flaring Gas System
Table
3.10 Conversion Factors for
Wake-affected Point Sources and Area Sources
Table 4.1 Time Modes for Temporal Variation of
Road Population
Table 4.2 Assumed Length and Occupancy of
Different Classes of Vehicle
Table 4.3 Projected Traffic Population
Table 4.4 Projected Number of Passengers for
Railway Lines
Table 4 5 Population for OWTF during Operation
Phase
Table 4.6 Time Modes for Temporal Variation of
Population
Table 4.7 Indoor/Outdoor Ratios for Different Population
Categories
Table 4.8 Wind Direction Frequencies at Chek
Lap Kok Weather Station
Table 4.9
Properties of Chlorine
Table
4.10 Hazardous Scenarios of
Chlorine Outflow from the SHWWTW Buildings According to 1992 SHWWTW HA Report
Table
4.11 Hazardous Scenarios of
Chlorine Outflow from the SHWWTW Buildings Taking Into Account Use of
Reinforced Concrete Panels
Table
4.12 Hazardous Scenarios for
Onsite Transport of Chlorine
Table
4.13 Summary of Chlorine Incidents
of Water Treatment Plant from MHIDAS
Table
4.14 Properties of Biogas (Natural
Gas)
Table
4.15 Hazards Associated with
Biogas Storage
Table
4.16 Release Scenarios
Table
4.17 Assessment Criteria for
Biogas Hazards
Table
4.18 Hazard Distances
Table
4.19 Summary of Release
Frequencies to Outside of Building
Table
4.20 Onsite Road Transport Failure
Case Frequencies
Table
4.21 Probability of Fatality
Table
4.22 Summary of PLL
Table
4.23 Feasible Risk Mitigation
Measures
Table
4.24 Quantification of Risk
Mitigation Measures and Cost Estimation
Table 4.25 Quantification of Risk Mitigation
Measures and Cost Estimation
Table
4.26 Estimated ICAF and MJE for
Selected Mitigated Measures
Table 5.1 Summary of Water Quality Objectives
for the North Western WCZ
Table 5.2 Baseline Marine Water Quality
Condition for North Western WCZ
Table 6.1 Estimated Amount of Excavated
Materials to be Generated, Reused and Disposed of
Table 6.2 Estimated Amount of C&D Materials
to be Generated, Reused and Disposed of
Table 6.3
Summary of Waste Generation
during Construction Phase
Table 6.4 Summary of Waste Generation during
Operation Phase
Table 6.5 Summary of Waste Handling Procedures
and Disposal Routes during Construction Phase
Table 6.6 Summary of Waste Handling Procedures
and Disposal Routes during Operation Phase
Table 6.7 Materials used during the Operational
Phase of the Project with Land Contamination Potential
Table
7.1 Relationship
between Receptor Sensitivity and Impact Magnitude in Defining Impact
Significance
Table 7.2 Landscape Resources (LRs) within a
500m Radius of the Site
Table 7.3 Landscape Character Areas (LCAs)
Table 7.4 Landscape Resources (LRs) and
Landscape Character Areas (LCAs) and their Sensitivity to Change
Table 7.5 Visual Sensitive Receivers (VSRs) and
their Sensitivity to Change
Table 7.6 Visual Sensitive Receivers (VSRs) and
their Magnitude of Impacts
Table 7.7 Proposed Landscape and Visual
Mitigation Measures for Construction Phase
Table 7.8 Proposed Landscape and Visual
Mitigation Measures for Operation Phase
Table 7.9 Significance of Landscape Impacts in
Construction and Operation Phases
Table
7.10 Significance of Visual
Impacts in Construction and Operation Phases
Table 8.1 Area Sensitivity Ratings (ASRs)
Table 8.2 Acceptable Noise Levels for
Construction Work (Restricted Hours)
Table 8.3 Acceptable Noise Levels for Fixed
Noise Sources
Table
10.1 Summary of Key Environmental
Outcomes / Benefits
Table
11.1 Project Implementation
Schedule
List of Figures
Figure 2.1 Locations of Potential Sites for
Organic Waste Treatment Facilities (OWTF)
Figure 2.2 Preliminary Site Layout
Figure 2.3 Process Flow Diagram (PFD)
Figure 3.1 Site Location Plan and Locations of
Representative Air Sensitive Receivers
Figure 3.2 Contours of Cumulative Maximum 1-hour
Average NO2 Concentration in ug/m3 at 8mPD
Figure 3.3 Contours of Cumulative Maximum 24-hour
Average NO2 Concentration in ug/m3 at 8mPD
Figure 3.4 Contours of Cumulative Annual Average
NO2 Concentration in ug/m3 at 8mPD
Figure 3.5 Contours of Cumulative Maximum 24-hour
Average RSP Concentration in ug/m3 at 32.5mPD
Figure 3.6 Contours of Cumulative Annual Average
RSP Concentration in ug/m3 at 8mPD
Figure 3.7 Contours of
Cumulative Maximum 1-hour Average SO2 Concentration in ug/m3
at 14mPD
Figure 3.8 Contours of Cumulative Maximum 24-hour
Average SO2 Concentration in ug/m3 at 14mPD
Figure 3.9 Contours of Cumulative Annual Average
SO2 Concentration in ug/m3 at 14mPD
Figure 3.10 Contours of Maximum 1-hour Average HCl
Concentration in ug/m3 at 29.5mPD
Figure 3.11 Contours of Annual Average HCl
Concentration in ug/m3 at 32.5mPD
Figure 3.12 Contours of Maximum 1-hour Average HF
Concentration in ug/m3 at 29.5mPD
Figure 3.13 Contours of Annual Average HF Concentration
in ug/m3 at 32.5mPD
Figure 3.14 Contours of Maximum 1-hour Average VOC
Concentration in ug/m3 at 32.5 mPD
Figure 4.2 Societal Risk Guidelines
Figure 4.3 Population Restrictions Endorsed by the
CCPHI
Figure 4.4 Presentation of Consequence Results
Figure 4.5 Hazard Distance due to Biogas Storage
Figure 4.6 WTW Combined Risk - Individual Risk
Contours
Figure 4.7 Societal Risk (All Scenarios -
Unmitigated)
Figure 4.8 Contribution of OWTF to Societal Risk
for Year 2013 Scenario without LLP
Figure 4.9 Societal Risk (Mitigated Scenarios)
Figure 4.10 Location of 3m Height Fence
Figure 7.2 Proposed Site Layout Plan and Aerial
View
Figure 7.3 Landscape Impact Assessment Area
Figure 7.4 Landscape Character Map of Hong Kong
Figure 7.5 Landscape Resources
Figure 7.6 Landscape Character Areas
Figure 7.7 Visual Sensitive Receivers &
Location of View Angles (1 of 3)
Figure 7.8 Visual Sensitive Receivers &
Location of View Angles (2 of 3)
Figure 7.9 Visual Sensitive Receivers &
Location of View Angles (3 of 3)
Figure 7.10 View Angles from Visual Sensitive
Receivers (VSR 1)
Figure 7.11 View Angles from Visual Sensitive
Receivers (VSR 2)
Figure 7.12 View Angles from Visual Sensitive
Receivers (VSR 3)
Figure 7.13 View Angles from Visual Sensitive
Receivers (VSR 4)
Figure 7.14 View Angles from Visual Sensitive
Receivers (VSR 5)
Figure 7.15 View Angles from Visual Sensitive
Receivers (VSR 6)
Figure 7.16 View Angles from Visual Sensitive
Receivers (VSR 7)
Figure 7.17 View Angles from Visual Sensitive
Receivers (VSR 8)
Figure 7.18 View Angles from Visual Sensitive
Receivers (VSR 9)
Figure 7.19 View Angles from Visual Sensitive
Receivers (VSR 10)
Figure 7.20 Landscape Master Plan
Figure 7.21 Aerial View at Opening Year
Figure 7.22 Aerial View – Year 10 of Operation
Figure 7.23 Photomontage View Angle A – Existing
Condition
Figure 7.24 Photomontage View Angle A – Unmitigated
Impacts
Figure 7.25 Photomontage View Angle A – Day 1 with
Mitigation Measures
Figure 7.26 Photomontage View Angle A – Year 10 with
Mitigation Measures
Figure 7.27 Photomontage View Angle B – Existing
Condition
Figure 7.28 Photomontage View Angle B – Unmitigated
Impacts
Figure 7.29 Photomontage View Angle B – Day 1 with
Mitigation Measures
Figure 7.30 Photomontage View Angle B – Year 10 with
Mitigation Measures
Figure 8.1 Noise Assessment Study Area
Figure 8.2 Nearest Noise Sensitive Receivers to
OWTF
List of Appendices
Appendix 2.1 Summary of Findings of Stage I Exercise
Appendix 3.1 Calculation of Emission Rates of Organic Waste Treatment Facilities
Appendix 3.2 Calculation of the Composite Emission
Factors for Each Road Link
Appendix 3.3 Calculation of Emissions from Marine Vessels
Appendix 3.5 Locations of Air Emission Sources in the
Assessment
Appendix 3.6 Predicted Air Quality Assessment Results
Appendix 4.2 Historical Incidents Review
Appendix 4.3 Generic Frequency Estimations
Appendix 4.4 Chlorine Dispersion Consequence Results
Appendix 4.6 Illustration of Double Membrane Type Gas
Buffer