Contents

Chapter    Title                                                                                                                           Page

3.1                  Introduction________________________________________________________________ 3-1

3.2                  Air Quality Legislations, Standards and Guidelines__________________________________ 3-1

3.3                  Baseline Conditions__________________________________________________________ 3-4

3.4                  Identification of Pollution Sources______________________________________________ 3-32

3.5                  Air Quality Modelling Methodology______________________________________________ 3-40

3.6                  Evaluation and Assessment of the Air Quality Impacts_______________________________ 3-70

3.7                  Mitigation Measures_________________________________________________________ 3-87

3.8                  Evaluation of Residual Impacts________________________________________________ 3-92

3.9                  Environmental Monitoring and Audit____________________________________________ 3-97

3.10                Conclusion_______________________________________________________________ 3-98

 

Tables

Table 3.1:__ Hong Kong Air Quality Objectives 3-2

Table 3.2:__ Limits of air pollutant concentrations inside car parks and vehicle tunnels 3-3

Table 3.3:__ Representative ASRs Identified for the Assessment 3-7

Table 3.4:__ Average Background TSP Concentrations from EPD’s Urban Air Monitoring Stations (Year 2007-2011)      3-32

Table 3.5:__ Air Quality Monitoring Results for Hong Kong Section of Guangzhou-Shenzhen-Hong Kong Express Rail Link relevant to WKCD (March 2010 – December 2012) 3-33

Table 3.6:__ Average Background Air Pollutant Concentrations from EPD’s Urban Air Monitoring Stations (Year 2007-2011) 3-33

Table 3.7:__ Average Background Air Pollutant Concentrations from EPD’s Local Monitoring Station at WKCD Site (September 2011 – August 2012) 3-34

Table 3.8:__ Number of Odour Complaints against NYMTTS Received by EPD (2006-2013) 3-34

Table 3.9:__ Summary of concurrent projects during construction phase_ 3-36

Table 3.10:_ Key Dust Emission Factors Adopted in the Assessment 3-42

Table 3.11:_ Summary of tentative active area calculations for Tier 2 and Annual TSP assessment 3-44

Table 3.12:_ Vehicle Classification in the EMFAC-HK Model 3-48

Table 3.13:_ Estimated Emission Rates of Barges at NYPCWA_ 3-59

Table 3.14:_ Estimated Emission Rates of Fast Ferries at China Ferry Terminal 3-60

Table 3.15:_ Estimated Emission Rates of Cruise Ships at Ocean Terminal 3-61

Table 3.16: Summary of 2015 and 2020 Hong Kong Emission Inventory for the PATH Model 3-62

Table 3.17:_ Summary of Predicted Cumulative Hourly Average TSP Concentrations for All ASRs (Tier 1 Unmitigated & Mitigated) 3-70

Table 3.18:_ Predicted Cumulative Hourly Average TSP Concentrations for ASRs with Exceedance (Tier 1 Mitigated)     3-71

Table 3.19:_ Summary of Predicted Cumulative Daily Average TSP Concentrations for All ASRs (Tier 1 Unmitigated & Mitigated) 3-72

Table 3.20:_ Summary of Predicted Cumulative Hourly Average TSP Concentrations (Tier 2 Mitigated) 3-72

Table 3.21:_ Summary of Predicted Cumulative Annual Average TSP Concentrations for All ASRs (Unmitigated & Mitigated) 3-73

Table 3.22:_ Summary of Predicted Cumulative RSP, SO2 and NO2 Concentrations for All ASRs 3-74

Table 3.23:_ Breakdown of Predicted Cumulative NO2 Concentrations by Sources for ASRs with Potential Exceedance_ 3-75

Table 3.24:_ Breakdown of Predicted Cumulative Hourly NO2 Concentrations by Sources for Selected ASRs (for the Worst Case Year of 2015) 3-76

Table 3.25:_ Breakdown of Predicted Cumulative Hourly NO2 Concentrations by Sources for Selected ASRs (for Year 2020) 3-77

Table 3.26 _ Estimated Odour Emission Rates for NYMTTS_ 3-80

Table 3.27__ Summary of Odour modelling Results 3-82

Table 3.28  Breakdown of Odour modelling Results under Current Scenario_ 3-85