Section    Title                                                                                                                           Page

3.1              Introduction________________________________________________________________ 3-1

3.2              Environmental Legislations, Standards and Guidelines______________________________ 3-1

3.3              Baseline Condition and Sensitive Receivers_______________________________________ 3-3

3.4              Identification of Pollution Sources and Assessment Methodology_______________________ 3-6

3.5              Identification, Prediction and Evaluation of Environmental Impact______________________ 3-20

3.6              Mitigation of Adverse Environmental Impact_______________________________________ 3-36

3.7              Evaluation of Residual Impact_________________________________________________ 3-38

3.8              Environmental Monitoring and Audit_____________________________________________ 3-39

3.9              Conclusion_______________________________________________________________ 3-39

 

 

 

Figure

3-1.1 to 3-1.11              Location of Air Sensitive Receivers and the Assessment Area

3-2.1 to 3-2-11              Location of Potential Dust Emission Source

3-3.1 to 3-3.17              Location of 30% Active Areas of Dust Sources Assumed for Tier 2 Assessment

3-4.1a to 3-4.9a            Cumulative Result  - Contour of Tier 1 Hourly TSP Concentration (mg/m3) at 1.5m Above  Ground during Construction Phase (unmitigated)

3-4.1b to 3-4.9b            Cumulative Result  - Contour of Tier 1 Hourly TSP Concentration (mg/m3) at 1.5m Above  Ground during Construction Phase (mitigated)

3-5.1 to 3-5.17              Cumulative Result  - Contour of Tier 2 Hourly TSP Concentration (mg/m3) at 1.5m Above Ground during Construction Phase (mitigated)

3-6.1a to 3-6.9a            Cumulative Result  - Contour of Tier 1 Daily TSP Concentration (mg/m3) at 1.5m Above Ground during Construction Phase (unmitigated)

3-6.1b to 3-6.9b            Cumulative Result  - Contour of Tier 1 Daily TSP Concentration (mg/m3) at 1.5m Above Ground during Construction Phase (mitigated)

3-7.1 to 3-7.6                Cumulative Result  - Contour of Tier 2 Daily TSP Concentration (mg/m3) at 1.5m Above Ground during Construction Phase (mitigated)

3-8.1a to 3-8.9a            Cumulative Result  - Contour of Annual TSP Concentration (mg/m3) at 1.5m Above Ground during Construction Phase (unmitigated)

3-8.1b to 3-8.9b            Cumulative Result  - Contour of Annual TSP Concentration (mg/m3) at 1.5m Above Ground during Construction Phase (mitigated)

3-9.1 to 3-9.11              Classifications of Road Types

3-10.1 to 3-10.9            Cumulative Result  - Contour of Hourly NO2 Concentration (mg/m3) at 1.5m Above Ground during Operational Phase (Stability Class D)

3-11.1 to 3-11.9            Cumulative Result  - Contour of Daily NO2 Concentration (mg/m3) at 1.5m Above Ground during Operational Phase (Stability Class D)

3-12.1 to 3-12.9            Cumulative Result  - Contour of  Daily RSP Concentration (mg/m3) at 1.5m Above Ground during Operational Phase (Stability Class D)

3-13.1 to 3-13.9            Cumulative Result  - Contour of Hourly NO2 Concentration (mg/m3) at 1.5m Above Ground during Operational Phase (Stability Class F)

3-14.1 to 3-14.9            Cumulative Result  - Contour of Daily NO2 Concentration (mg/m3) at 1.5m Above Ground during Operational Phase (Stability Class F)

3-15.1 to 3-15.9            Cumulative Result  - Contour of  Daily RSP Concentration (mg/m3) at 1.5m Above Ground during Operational Phase (Stability Class F)

3-16.1 to 3-16.9            Cumulative Result  - Contour of Annual NO2 Concentration (mg/m3) at 1.5m Above Ground during Operational Phase

3-17.1 to 3-17.9            Cumulative Result  - Contour of  Annual RSP Concentration (mg/m3) at 1.5m Above Ground during Operational Phase

 

 

 

Appendix

3.1a               Details of Dust Emission Sources for 1-hour and Daily TSP Assessment (Tier 1)

3.1b               Details of Dust Emission Sources for Annual TSP Assessment

3.1c               Details of Dust Emission Sources for 1-hour and Daily TSP Assessment (Tier 2)

3.1d               Estimation of Percentage Active Area for Different Stages of Construction Activities

3.1e               Estimation of Total Percentage Active Area for Hourly, Daily and Annual TSP Assessment

3.1f                Estimation of Dust Suppression Efficiency

3.2                 Exhaust Technology Fractions

3.3                 Vehicle Population in Years 2018, 2023, 2028 and 2033.

3.4                 Diurnal Traffic Pattern, VMT and Trips in 2018, 2023, 2028 and 2033

3.4-1              Traffic Forecast for 2018, 2023, 2028 and 2033

3.4-2              Road Type and Distance

3.4-3              Trips and VMT for Petrol Vehicles in Hong Kong

3.4-4              VMT and Trips for 2018, 2023, 2028 and 2033 in the Study Area

3.5                 Relative Humidity and Temperature

3.6                 Peak Hour Speed, Volume/Capacity Ratio and Speed Fractions in 2018, 2023, 2028 and 2033.

3.7a               Comparison of Emissions with Peak and Non-peak Speeds in 2018, 2023, 2028 and 2033

3.7b               Calculation of Worst Case Emission Rates for Different Road Types

3.8                 Calculations of the Composite Emission Factors

3.9a               Calculations of the Emission Rates for Ventilation Shafts and Building

3.9b               Selection of Worst Case Hourly Emission for Calculation of Emission Rates for Ventilation Shafts and Building

3.10a             Calculations of Idling Emissions

3.10b             Determination of Idling Emission Factors as Extracted from the Feasibility Study

3.10c             Estimation of NOx Composite Idling Emission Factors

 

Tables

Table 3.1:__ Hong Kong Air Quality Objectives_ 3-1

Table 3.2:__ Tunnel Air Quality Guidelines_ 3-2

Table 3.3:__ Representative ASRs Identified for the Assessment 3-4

Table 3.4:__ Assumptions for Calculation of Dust Emission Factors_ 3-6

Table 3.5:__ Vehicle Classification in the EMFAC-HK Model 3-10

Table 3.6:__ Worst Case Emission Factors as Predicted by EMFAC-HK Model 3-13

Table 3.7:__ Forecast of Idling Vehicles in Kiosks, L&UL and PTI in Peak Hour 3-16

Table 3.8:__ Idling Emissions from Kiosks, L&UL areas and PTI 3-17

Table 3.9:__ Predicted Cumulative Hourly Average TSP Concentration in near the BCP, Lin Ma Hang to Frontier Closed Area and Ping Yeung to Wo Keng Shan (Tier 1 – Unmitigated) 3-20

Table 3.10:_ Predicted Cumulative Hourly Average TSP Concentration in Sha Tau Kok (Tier 1– Unmitigated) 3-21

Table 3.11:_ Predicted Cumulative Hourly Average TSP Concentration in Po Kak Tsai (Tier 1– Unmitigated) 3-21

Table 3.12:_ Predicted Cumulative Hourly Average TSP Concentration in Fanling (Tier 1 – Unmitigated) 3-21

Table 3.13:_ Predicted Cumulative Hourly Average TSP Concentration in near the BCP, Lin Ma Hang to Frontier Closed Area and Ping Yeung to Wo Keng Shan (Tier 1 – Mitigated) 3-22

Table 3.14:_ Predicted Cumulative Hourly Average TSP Concentration in Sha Tau Kok (Tier 1– Mitigated) 3-22

Table 3.15:_ Predicted Cumulative Hourly Average TSP Concentration in Po Kak Tsai (Tier 1– Mitigated) 3-23

Table 3.16:_ Predicted Cumulative Hourly Average TSP Concentration in Fanling (Tier 1 – Mitigated) 3-23

Table 3.17:_ Predicted Cumulative Hourly Average TSP Concentration at Selected ASRs (Tier 2 – Mitigated) 3-23

Table 3.18:_ Predicted Cumulative Daily Average TSP Concentration in near the BCP, Lin Ma Hang to Frontier Closed Area and Ping Yeung to Wo Keng Shan (Tier 1 – Unmitigated) 3-24

Table 3.19:_ Predicted Cumulative Daily Average TSP Concentration in Sha Tau Kok (Tier 1 – Unmitigated) 3-25

Table 3.20:_ Predicted Cumulative Daily Average TSP Concentration in Po Kak Tsai (Tier 1 – Unmitigated) 3-25

Table 3.21:_ Predicted Cumulative Daily Average TSP Concentration in Fanling (Tier 1 – Unmitigated) 3-25

Table 3.22:_ Predicted Cumulative Daily Average TSP Concentration in near the BCP, Lin Ma Hang to Frontier Closed Area and Ping Yeung to Wo Keng Shan (Tier 1 – Mitigated) 3-25

Table 3.23:_ Predicted Cumulative Daily Average TSP Concentration in Sha Tau Kok (Tier 1 – Mitigated) 3-26

Table 3.24:_ Predicted Cumulative Daily Average TSP Concentration in Po Kak Tsai (Tier 1 – Mitigated) 3-26

Table 3.25:_ Predicted Cumulative Daily Average TSP Concentration in Fanling (Tier 1 – Mitigated) 3-26

Table 3.26:_ Predicted Cumulative Daily Average TSP Concentration at Selected ASRs (Tier 2 – Mitigated) 3-27

Table 3.27:  Predicted Cumulative Annual Average TSP Concentration in near the BCP, Lin Ma Hang to Frontier Closed Area and Ping Yeung to Wo Keng Shan (Unmitigated) 3-27

Table 3.28: Predicted Cumulative Annual Average TSP Concentration in Sha Tau Kok (Unmitigated) 3-28

Table 3.29: Predicted Cumulative Annual Average TSP Concentration in Po Kak Tsai (Unmitigated) 3-28

Table 3.30:_ Predicted Cumulative Annual Average TSP Concentration in Fanling (Unmitigated) 3-28

Table 3.31:  Predicted Cumulative Annual Average TSP Concentration in near the BCP, Lin Ma Hang to Frontier Closed Area and Ping Yeung to Wo Keng Shan (Mitigated) 3-29

Table 3.32: Predicted Cumulative Annual Average TSP Concentration in Sha Tau Kok (Mitigated) 3-29

Table 3.33: Predicted Cumulative Annual Average TSP Concentration in Po Kak Tsai (Mitigated) 3-30

Table 3.34:_ Predicted Cumulative Annual Average TSP Concentration in Fanling (Mitigated) 3-30

Table 3.35:_ Predicted Cumulative Hourly and Daily NO2 and Daily RSP concentrations for Stability Class D_ 3-30

Table 3.36:_ Predicted Cumulative Hourly and Daily NO2 and Daily RSP concentrations for Stability Class F_ 3-32

Table 3.37:_ Predicted Cumulative Annual NO2 and RSP concentrations_ 3-34