Environmental Impact Assessment for A Rooftop Helipad at the Proposed New Block of Queen Mary Hospital


Table of Content

1          Introduction                                                                                      

        1.1      General                                                                                          
        1.2      Project Background                                                                       
        1.3      Purpose and Approach of the EIA Study                                         
        1.4      Structure of this EIA Study Report       

                                          
2          Project Description                                                                         

        2.1      The Need and Benefits of the Project                                                
        2.2      Key Project Requirements                                                              
        2.3      Project History and Site Selection                                                            
        2.4      Project Implementation and Schedule                                            
        2.5      Construction Method                                                                    
        2.6      Concurrent and Interfacing Projects                                               
        2.7      Consideration of “Without Project” Scenario                                   
        2.8      Public Consultation and Comments
                                          

3          Air Quality                                                                                        

        3.1      Introduction                                                                                  
        3.2      Criteria and Guidelines                                                                  
        3.3      Description of the Environment
        3.4      Construction Stage                                                                       
        3.5      Operation Stage
        3.6      Conclusion                                                                   
                                                                                  

4          Noise Impact                                                                                  

        4.1      Introduction                                                                                  
        4.2      Criteria and Guidelines                                                                                                                  
        4.3      Description of the Environment                                                     
        4.4      Noise Sensitive Receivers                                                             
        4.5      Construction Stage                                                                       
        4.6      Operation Stage                                                                           
        4.7      Evaluation of Residual Helicopter Noise Impact                             
        4.8      Conclusion and Recommendation                                                 
        4.9      Reference
                                                                                    

5          Waste Management                                                                      

        5.1      Introduction                                                                                  
        5.2      Criteria and Guidelines                                                                  
        5.3      Description of the Environment                                                     
        5.4      Construction Stage                                                                                 
        5.5      Operation Stage                                                                           
        5.6      Conclusion   

                                                                                

6          Ecological Impact – Terrestrial                                                  

        6.1      Introduction                                                                                  
        6.2      Criteria and Guidelines                                                                  
        6.3      Description of the Environment                                                     
        6.4      Assessment Methodology                                                                                  
        6.5      Evaluation of Surrounding Environment                                                                            
        6.6      Construction Stage                                                                                            
        6.7      Operation Stage                                                                                       
        6.8      Recommended Mitigation Measures                                              
        6.9      Residual Impact                                                                           
        6.10    Conclusion                                                                                   
        6.11    Reference
                                                                                   

7          Visual Impact                                                                                  

        7.1      Introduction                                                                                  
        7.2      Relevant legislation, standards and guidelines                               
        7.3      Description of the Environment                                                     
        7.4      Operation Stage                                                                                              
        7.5      Conclusion  
                                                                                 

8          Environmental Monitoring and Audit Requirements           

        8.1      Introduction                                                                                  
        8.2      Air Quality                                                                                                                                          
        8.3      Noise Impact                                                                                                                                       
        8.4      Waste Management                                                                                                                 
        8.5      Ecological Impact – Terrestrial                                                                                      
        8.6      Visual Impact                                                                                                                     
        8.7      Summary of Environmental Monitoring and Audit Requirements 

9          Conclusion                                                                                     

10       Implementation Schedule

                                                         



List of Figures

        Figure 1.1    Site Location and its Environs
        Figure 1.2    Locations of the Proposed Helipad and the Existing Helipad in TMH, PYNEH and Wan Chai Heliport
        Figure 2.1    Closer view of Proposed Helipad
        Figure 2.2    Section view of Proposed Helipad
        Figure 2.3    Elevation Views of Proposed Helipad
        Figure 2.4    Alternatives of Helipad Siting
        Figure 2.5    Flight Sector Options for the Proposed Helipad
        Figure 2.6    Selected Flight Sectors for the Proposed Helipad
        Figure 2.7    Selected Flight Sectors for the Proposed Helipad (Aerial View)
        Figure 3.1    Locations of Representative Air Sensitive Receivers (ASRs) within 500m Study Area
        Figure 3.2    Representative Air Quality Impact Assessment Points
        Figure 3.3    Emission Sources for Air Quality Modelling Assessment
        Figure 3.4    Contour for Cumulative Impact of 10-min Average SO2 Concentration at 289.2mPD
        Figure 4.1    Locations of Representative Noise Sensitive Receivers (NSRs)
        Figure 4.1a   Locations of Representative Noise Sensitive Receivers (NSRs)  (Area 1)
        Figure 4.1b  Locations of Representative Noise Sensitive Receivers (NSRs)   (Area 2)
        Figure 4.1c   Locations of Representative Noise Sensitive Receivers (NSRs)  (Area 3)
        Figure 4.2    Construction Work Area
        Figure 4.3    Proposed Flight Sectors and Representative NSRs for Helicopter Noise Impact Assessment
        Figure 4.4    Schematic for Typical Helicopter Operation
        Figure 4.5    Mitigation Measures for the Proposed Helipad
        Figure 4.6a   Typical Section Drawing for Illustration of Flight Profile under Unmitigated Scenario
        Figure 4.6b  Typical Section Drawing for Illustration of Flight Profile under Mitigated Scenario
        Figure 4.7a   Helicopter Noise Contour at +246.9mPD Level (Mitigated Scenario)
        Figure 4.7b  Helicopter Noise Contour at +140.0mPD Level (Mitigated Scenario)
        Figure 4.7c   Helicopter Noise Contour at +61.5mPD Level (Mitigated Scenario)
        Figure 4.7d  Helicopter Noise Contour at +18.3mPD Level (Mitigated Scenario)
        Figure 6.1    Study Area for Terrestrial Ecological Impact Assessment
        Figure 6.2    Habitat Map and Location of Identified Avifauna Species
        Figure 7.1    Existing Environment (Night-time)
        Figure 7.2    Identified Representative Visual Sensitive Receivers
        Figure 7.3    Section Drawing for Visual Impact Assessment at VSR 1



List of Tables

        Table 2.1       Summary of need and benefits of the Project
        Table 2.2       Summary of Flight Data Landed at PYNEH, TMH and Wan Chai Heliport during Year 2011 to 2015
        Table 2.3       Selection of Acute Hospitals (with A&E Services) for the Proposed Helipad
        Table 2.4       Alternative of Helipad Siting Locations
        Table 2.5       Considerations of the Selection for Flight Sectors
        Table 2.6       Medical Services Capability in TMH, PYNEH and QMH
        Table 2.7       Merits and Demerits of the Construction Methods for the Proposed Helipad
        Table 3.1        Air Quality Objectives
        Table 3.2        Air Quality Monitoring Concentrations (µg/m3) at Central/Western (2011 to 2015)
        Table 3.3        Air Quality Monitoring Concentrations (µg/m3) at the Monitoring Stations – SSQ & CWSS (2011 to 2015)
        Table 3.4        The PATH Background Concentrations at Concerned Grids (µg/m3) (2020)
        Table 3.5        Summary of Representative Air Sensitivity Receivers (ASRs)
        Table 3.6        Conversion Factors for 1-hour average SO2 to 10-min Average SO2 Concentration
        Table 3.7        Predicted 4th Highest 10-min Average SO2 Concentration at Worst Affected Assessment Points (Emission from the Helicopter Operation only)
        Table 3.8        The 4th Highest 10-min Average SO2 Background Concentrations (µg/m3) (2020)
        Table 3.9        Predicted 4th Highest 10-min Average SO2 Concentration at Worst Affected Assessment Points (Cumulative Impact)
        Table 4.1        Noise Standards for Daytime Construction Activities (Non-restricted Hours)
        Table 4.2        Helicopter Noise Standards for Planning Purpose
        Table 4.3        Representative Noise Sensitive Receivers
        Table 4.4        Powered Mechanical Equipment for Construction of the Proposed Helipad
        Table 4.5        Predicted Construction Noise Level Leq (30 mins) dB(A)
        Table 4.6        Powered Mechanical Equipment for Construction of the New Block of QMH
        Table 4.7        Cumulative Construction Noise Level Leq (30 mins) dB(A)
        Table 4.8        Emergency Helicopter Operation Records at PYNEH (2011 – 2015)
        Table 4.9        Helicopter Noise Data – Lateral Movements
        Table 4.10     Helicopter Noise Data – Non-lateral Movements
        Table 4.11     Minimum Buffer Distances for Different Operation Modes
        Table 4.12     Predicted Helicopter Noise Levels (Lmax) of the Worst Operation Mode (Unmitigated)
        Table 4.13     Summary of Noise Barriers and Noise Reducers
        Table 4.14     Predicted Helicopter Noise Levels (Lmax) of the Worst Operation Mode (Mitigated)
        Table 4.15     Information and Helicopter Noise Complaints of TMH and PYNEH (2011 – 2015)
        Table 6.1        Fauna Species Identified During Field Survey
        Table 6.2        Ecological Evaluation of Black Kite (Milvus migrans)
        Table 6.3        Ecological Evaluation of House Swift (Apus nipalensis)
        Table 7.1        Summary of the Visual Impact
        Table 8.1        Summary of Required EM&A
        Table 9.1        Summary of Noise Barriers and Noise Reducers
        Table 9.2        Summary of Waste Generation
        Table 10.1     Air Quality - Implementation Schedule of Mitigation Measures
        Table 10.2     Noise - Implementation Schedule of Mitigation Measures
        Table 10.3     Waste - Implementation Schedule of Mitigation Measures
        Table 10.4     Ecological Impact - Implementation Schedule of Mitigation Measures
        Table 10.5     Visual Impact - Implementation Schedule of Mitigation Measures

 

Appendix

        Appendix 1.1      Project Information and Operation Requirements from Relevant Government Departments
        Appendix 3.1      Information of Fuel Properties and Helicopter Emission
        Appendix 3.2      Helicopter Emission Calculation
        Appendix 3.3      Predicted Air Quality Results
        Appendix 4.1      Review of Overseas / International Practices on Noise Assessment for Emergency Helicopter Operations during Evening and Night-time Periods
        Appendix 4.2      List of Representative Noise Sensitive Receivers
        Appendix 4.2a    Photos of Representative Noise Sensitive Receivers
        Appendix 4.3      Construction Noise Calculations (Unmitigated Scenario)
        Appendix 4.3a    Cumulative Construction Noise Calculations (Mitigated Scenario)
        Appendix 4.4      Helicopter Noise Calculation (Unmitigated Scenario)
        Appendix 4.5      The Illustration of Noise Screening (NSR1 to NSR48)
        Appendix 4.6      Helicopter Noise Calculation (Mitigated Scenario)
        Appendix 9.1      Summary of Environmental Impacts
        Appendix 9.2      Key Assessment Assumptions and Limitation of Assessment Methodologies