Agreement No. CE31/2014 (CE)

Engineering Study for Police

Facilities in Kong Nga Po –

Feasibility Study

 

Environmental Impact Assessment Report

 

July 2016

 

 

Civil Engineering and Development Department

 

 

 

Contents

 

 

 

Chapter    Title                                                                                                                           Page

1                      Introduction                                                                                                                                                                  1-1

1.1                  Background                                                                                                                                                                  1-1

1.2                  Designated Projects under the EIA Ordinance                                                                                                                      1-1

1.3                  Purpose of the EIA Study                                                                                                                                                           1-1

1.4                  Objectives of the EIA Study                                                                                                                                                       1-2

1.5                  Scope of the EIA Study                                                                                                                                                               1-3

1.6                  Structure of the EIA Report                                                                                                                                                        1-4

 

2                      Project Description                                                                                                                                                                     2-1

2.1                  Introduction                                                                                                                                                                   2-1

2.2                  Project Location and History                                                                                                                                                     2-1

2.2.1               Project Location                                                                                                                                                                           2-1

2.2.2               Site History                                                                                                                                                                   2-1

2.3                  Project Scope                                                                                                                                                                               2-2

2.4                  Need of the Project                                                                                                                                                                     2-2

2.4.1               Police Facilities                                                                                                                                                                            2-2

2.4.2               Access Road to be Constructed or Improved                                                                                                                        2-3

2.4.3               Benefits of the Project                                                                                                                                                                2-3

2.5                  Consideration of “Without Project” Alternative                                                                                                                       2-4

2.6                  Consideration of Alternative Siting and Layout                                                                                                                     2-4

2.6.1               Development Siting                                                                                                                                                                    2-4

2.6.2               Development Layout Options                                                                                                                                                   2-5

2.6.3               Access Options                                                                                                                                                                            2-8

2.7                  Consideration of Alternative Construction Methods                                                                                                             2-10

2.7.1               Site Formation and Road Works                                                                                                                                              2-10

2.7.2               Retaining Walls and Slope Works                                                                                                                                            2-11

2.7.3               Building Works                                                                                                                                                                             2-11

2.8                  Programme and Sequence of Works                                                                                                                                      2-12

2.9                  Concurrent Projects                                                                                                                                                                    2-12

 

3                      Air Quality Impact                                                                                                                                                                        3-1

3.1                  Introduction                                                                                                                                                                   3-1

3.2                  Environmental Legislation, Standards and Guidelines                                                                                                       3-1

3.3                  Project Site                                                                                                                                                                    3-3

3.4                  Study Area and Air Sensitive Receivers                                                                                                                  3-10

3.5                  Identification of Pollution Sources and Key Pollutants                                                                                                        3-18

3.6                  Air Quality Modelling Methodology                                                                                                                                          3-22

3.7                  Odour Impact Assessment Methodology                                                                                                                                3-39

3.8                  Evaluation and Assessment of Air Quality Impacts                                                                                                              3-41

3.9                  Mitigation of Adverse Environmental Impact                                                                                                                         3-47

3.10                Evaluation of Residual Impact                                                                                                                                  3-49

3.11                Environmental Monitoring and Audit                                                                                                                                       3-50

3.11                Conclusion                                                                                                                                                                                   3-51

 

 

4                     Noise Impact                                                                                                                                                                 4-1

4.1                  Introduction                                                                                                                                                                   4-1

4.2                  Relevant Legislation and Guidelines                                                                                                                                       4-1

4.3                  Description of the Noise Environment                                                                                                                                    4-5

4.4                  Construction Noise Impact Assessment                                                                                                                 4-6

4.5                  Road Traffic Noise Impact Assessment                                                                                                                  4-15

4.6                  Fixed Plant Noise Impact Assessment                                                                                                                                    4-19

4.7                  Helicopter Noise Impact Assessment                                                                                                                                     4-28

4.8                  Environmental Monitoring and Audit                                                                                                                                       4-38

4.9                  Conclusion                                                                                                                                                                                    4-39

 

5                     Water Quality Impact                                                                                                                                                   5-1

5.1                  Introduction_                                                                                                                                                                 5-1

5.2                  Environmental Legislation, Standards and Guidelines                                                                                                       5-1

5.3                  Assessment Area, Water Sensitive Receivers and Background Conditions                                                                   5-4

5.4                  Assessment Methodology                                                                                                                                                         5-7

5.5                  Identification and Evaluation of Water Quality Impacts                                                                                                       5-7

5.6                  Mitigation of Adverse Water Quality Impacts                                                                                                                         5-11

5.7                  Evaluation of Cumulative and Residual Impact                                                                                                                    5-15

5.8                  Environmental Monitoring and Audit                                                                                                                                       5-15

5.9                  Conclusion                                                                                                                                                                                    5-15

 

6                      Sewerage and Sewage Treatment Implications                                                                                                                  6-1

6.1                  Introduction                                                                                                                                                                   6-1

6.2                  Environmental Standards and Guidelines                                                                                                                             6-1

6.3                  Assessment Methodology                                                                                                                                                         6-1

6.4                  Existing Sewerage Conditions                                                                                                                                  6-1

6.5                  Estimation of Project-related Sewage Flows                                                                                                                         6-2

6.6                  Evaluation of Sewerage Impacts                                                                                                                                             6-4

6.7                  Mitigation Measures to Minimise Adverse Sewerage Impacts                                                                                           6-5

6.8                  Environmental Monitoring and Audit                                                                                                                                       6-6

6.9                  Conclusion                                                                                                                                                                                    6-6

 

 

7                      Waste Management Implications                                                                                                                                            7-1

7.1                  Introduction                                                                                                                                                                   7-1

7.2                  Environmental Legislation, Standards and Guidelines                                                                                                       7-1

7.3                  Assessment Methodology                                                                                                                                                         7-2

7.4                  Identification, Prediction and Evaluation of Environmental Impact                                                                                   7-3

7.5                  Mitigation of Adverse Environmental Impact                                                                                                                         7-10

7.6                  Evaluation of Residual Impact                                                                                                                                  7-12

7.7                  Environmental Monitoring and Audit Requirements                                                                                                            7-12

7.8                  Conclusion                                                                                                                                                                                    7-13

 

 

8                      Land Contamination                                                                                                                                                  8-1

8.1                  Introduction                                                                                                                                                                   8-1

8.2                  Environmental Legislation, Standards and Guidelines                                                                                                       8-1

8.3                  Assessment Methodology                                                                                                                                                         8-1

8.4                  Identification of Potential Environmental Impacts                                                                                                                8-2

8.5                  Prediction and Evaluation of Environmental Impacts                                                                                                          8-3

8.6                  Recommendation of Mitigation Measures                                                                                                                             8-4

8.7                  Evaluation of Residual Environmental Impacts                                                                                                                    8-5

8.8                  Environmental Monitoring and Audit Requirements                                                                                                            8-6

8.9                  Conclusion                                                                                                                                                                                    8-6

 

 

9                      Ecological Impact (Terrestrial and Aquatic)                                                                                                                           9-1

9.1                  Introduction                                                                                                                                                                   9-1

9.2                  Environmental Legislation, Standards and Guidelines                                                                                                       9-1

9.3                  Study Area and Methodology                                                                                                                                    9-2

9.4                  Baseline Condition and Ecological Sensitive Receivers                                                                                                     9-6

9.5                  Evaluation of Ecological Importance of Habitats and Species                                                                                          9-31

9.6                  Identification and Evaluation of Ecological Impacts                                                                                                             9-49

9.7                  Precautionary and Mitigation Measures                                                                                                                 9-57

9.8                  Evaluation of Residual Ecological Impact                                                                                                                              9-59

9.9                  Ecological Monitoring and Audit Requirements                                                                                                                    9-59

9.10                Summary                                                                                                                                                                                      9-59

9.11                References                                                                                                                                                                                   9-60

 

10                   Landscape and Visual Impacts_                                                                                                                                              10-1

10.1                Introduction                                                                                                                                                                   10-1

10.2                Landscape and Visual Legislation, Standard and Guidelines                                                                                           10-1

10.3                Assessment Area                                                                                                                                                                        10-2

10.4                Methodology for Assessment of Landscape and Visual Impacts                                                                                     10-2

10.5                Review of Relevant Guidelines on Landscape Strategies and Framework and Land Use Zoning                            10-8

10.6                Existing Trees within the Project Boundary                                                                                                                            10-9

10.7                Landscape Baseline Study                                                                                                                                                       10-12

10.8                Visual Baseline Study                                                                                                                                                                10-27

10.9                Option Assessment                                                                                                                                                                     10-30

10.10              Potential Sources of Landscape and Visual Impact                                                                                                            10-32

10.11              Landscape Impact Assessment                                                                                                                                               10-33

10.12              Visual Impact Assessment_                                                                                                                                                     10-39

10.13              Visual Enhancement and Landscape Mitigation Measures                                                                                               10-45

10.14              Residual Landscape Impact                                                                                                                                                     10-55

10.15              Residual Visual Impact                                                                                                                                                              10-64

10.16              Cumulative Impact                                                                                                                                                                     10-71

10.17              Summary and Conclusion                                                                                                                                                        10-71

 

11                   Impact of Hazard to Life                                                                                                                                                             11-1

11.1                Introduction                                                                                                                                                                   11-1

11.2                Population Adopted For the Assessment                                                                                                                               11-12

11.3                Modelling Approach and Calibration                                                                                                                                      11-19

11.4                Hazard Identification                                                                                                                                                                  11-20

11.5                Frequency Assessment                                                                                                                                                             11-31

11.6                Consequence Assessment                                                                                                                                                       11-40

11.7                Risk Assessment                                                                                                                                                                         11-51

11.8                Environmental Monitoring & Auditing                                                                                                                                     11-56

11.9                Conclusion                                                                                                                                                                                   11-56

11.10              Reference                                                                                                                                                                                     11-56

 

12                   Conclusion                                                                                                                                                                                    12-1

12.1                General                                                                                                                                                                                         12-1

12.2                Summary of Key Environmental Outcomes                                                                                                                          12-1

12.3                Air Quality Impact                                                                                                                                                                        12-3

12.4                Noise Impact                                                                                                                                                                                12-3

12.5                Water Quality Impact                                                                                                                                                  12-4

12.6                Sewerage and Sewage Treatment Implications                                                                                                                   12-5

12.7                Waste Management Implications                                                                                                                                            12-5

12.8                Land Contamination                                                                                                                                                                   12-6

12.9                Ecological Impact                                                                                                                                                                        12-7

12.10              Landscape and Visual Impacts                                                                                                                                                12-7

12.11              Impact of Hazard to Life                                                                                                                                                            12-8

12.12              Summary of Environmental Impacts                                                                                                                                      12-9

 

13                   Environmental Monitoring and Audit Requirements                                                                                                            13-1

13.1                General                                                                                                                                                                                         13-1

13.2                Air Quality Impact                                                                                                                                                                        13-1

13.3                Noise Impact                                                                                                                                                                                13-1

13.4                Water Quality Impact                                                                                                                                                  13-1

13.5                Sewerage and Sewage Treatment Implications                                                                                                                   13-1

13.6                Waste Management Implications                                                                                                                                            13-2

13.7                Land Contamination                                                                                                                                                                   13-2

13.8                Ecological Impact                                                                                                                                                                        13-2

13.9                Landscape and Visual Impacts                                                                                                                                                13-3

13.10              Impact of Hazard to Life__                                                                                                                                                       13-3

 

14                   Project Implementation Schedule                                                                                                                                            14-1

14.1                General                                                                                                                                                                                         14-1

List of Tables

Table 2.1:__ Comparison between the Refinement Options and Preliminary Layout                                                                          2-6

Table 2.2:__ Summary of Preliminary Development Parameters for Preferred Option                                                                      2-8

Table 2.3:__ Summary of Concurrent Project Considered for Cumulative Impacts                                                                             2-12

 

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

Table 3.2:__ Air Quality Monitoring Data at Tai Po Station (Year 2011 – 2015)                                                                                     3-9

Table 3.3:__ Background concentrations for 1-hour average NO2 and 10-minute average SO2 (Year 2011 – 2015)

at Tai Po Station                                                                                                                                                                                                  3-9

Table 3.4:__ Background concentrations for 24-hour average RSP, FSP and SO2 (Year 2011 – 2015) at Tai Po Station           3-9

Table 3.5:__ Representative ASRs Identified for Air Quality Impact Assessment                                                                                  3-10

Table 3.6:__ Summary of concurrent projects during construction and operation phase                                                                    3-22

Table 3.7:__ Key Dust Emission Factors Adopted in the Assessment                                                                                                     3-25

Table 3.8:__ Vehicle Classification in the EMFAC-HK Model                                                                                                                    3-29

Table 3.9:__ Operational Emissions of the OWTF2 CHP                                                                                                                           3-35

Table 3.10:_ Operational Emissions of the OWTF2 odour treatment units                                                                                             3-35

Table 3.11:_ Operational Emission of the OWTF2 flare                                                                                                                              3-36

Table 3.12:_ Summary of Years 2015 and 2020 Hong Kong Emission Inventory for the PATH Model                                            3-37

Table 3.13:_ Locations of air sample collection for odour testing                                                                                                             3-40

Table 3.14:_ Odour patrol and sampling dates and locations                                                                                                                   3-41

Table 3.15: Summary of Predicted Cumulative Maximum Hourly Average TSP Concentration and 10th Highest Daily

Average RSP and FSP Concentrations (Tier 1 Unmitigated and Mitigated                                                                                             3-42

Table 3.16:_ Summary of Predicted Cumulative Annual Average RSP and FSP Concentrations (Unmitigated and Mitigated) 3-42

Table 3.17:_ Summary of Predicted Cumulative Modelling Results during Operation Phase                                                            3-43

Table 3.18:_ Summary of historical odour complaints related to the existing pig farms and firing ranges                                      3-44

Table 3.19:_ Summary of odour testing results                                                                                                                                            3-45

 

Table 4.1:__ Noise Standards for Daytime Construction Activities                                                                                                           4-1

Table 4.2:__ Relevant Road Traffic Noise Standards for Planning Purposes                                                                                        4-2

Table 4.3:__ Area Sensitivity Rating                                                                                                                                                                4-3

Table 4.4:__ Acceptable Noise Level for Fixed Noise Source                                                                                                                   4-4

Table 4.5: __ Measured Background Noise Levels                                                                                                                                     4-6

Table 4.6:__ Representative Construction Noise Sensitive Receivers Identified for the Assessment                                               4-6

Table 4.7:__ Summary of Concurrent Projects                                                                                                                                             4-7

Table 4.8:__ Unmitigated Construction Airborne Noise Impact                                                                                                                4-9

Table 4.9:__ Quieter PME Recommended for Adoption during the Construction Phase of the Project                                            4-11

Table 4.10:_ Noise Mitigation Measures for Certain PME during the Construction Phase of the Project                                         4-12

Table 4.11:_ Mitigated Construction Airborne Noise Impact                                                                                                                      4-13

Table 4.12:_ Mitigated Cumulative Construction Airborne Noise Impact                                                                                                4-14

Table 4.13:_ Representative Road Traffic Noise Sensitive Receivers Identified for the Assessment                                               4-15

Table 4.14:_ Unmitigated Road Traffic Noise Impact in Year 2038                                                                                                          4-17

Table 4.15:_ Predicted Noise Impacts quantified by Number of Dwellings (Unmitigated)                                                                  4-18

Table 4.16:_ Representative Fixed Noise Sensitive Receivers Identified for the Assessment                                                            4-20

Table 4.17:_ Noise Criteria of Planned Fixed Noise Sources                                                                                                                    4-20

Table 4.18:_ Measurement Results for Vehicle Sirens / Simulation Shooting                                                                                       4-23

Table 4.19:_ Measurement Results for Normal Driving                                                                                                                              4-23

Table 4.20:_ Measurement Results on Tyre Noise, Skidding Noise and Braking Noise                                                                      4-23

Table 4.21:_ Summary of Fixed Noise Sources                                                                                                                                           4-25

Table 4.22:_ Maximum Permissible SWLs of the Fixed Plant                                                                                                                   4-25

Table 4.23:_ Number of Shots in 30-minute Period during a Training Day                                                                                            4-27

Table 4.24:_ Predicted Fixed Noise Impact from Planned Noise Sources                                                                                             4-27

Table 4.25:_ Cumulative Fixed Noise Impact from Existing and Planned Noise Sources                                                                  4-27

Table 4.26:_ HKPF Day-time Training                                                                                                                                                            4-28

Table 4.27:_ Frequency of using Lo Wu Range Helicopter Landing Site                                                                                                4-29

Table 4.28:_ Representative Helicopter Noise Sensitive Receivers Identified for the Assessment                                                   4-29

Table 4.29:_ Helicopter Noise Data (with Lateral Movements)                                                                                                                 4-33

Table 4.30:_ Helicopter Noise Data (without Lateral Movements)                                                                                                            4-33

Table 4.31:_ Summary of Different Operation Modes                                                                                                                                4-33

Table 4.32:_ Predicted Helicopter Noise Impact at All Representative NSRs                                                                                         4-35

 

Table 5.1:__ Water Quality Objectives for Deep Bay WCZ                                                                                                                         5-1

Table 5.2:__ Annual Summary of Water Quality Data for EPD Monitoring Stations IN1, IN2 and GR1 (2013)                                5-6

Table 5.3:__ Water Quality Data for Nearby Water Sensitive Receivers (from 15 April 2013)                                                            5-7

 

Table 6.1:__ Peaking Factors Adopted to Estimate Project-related Sewage Flows                                                                              6-3

Table 6.2:__ Sewage Flows for the Project                                                                                                                                                   6-3

Table 6.3:__ Summary of Sewage Flows generated by the Project to SWHSTW                                                                                 6-5

 

Table 7.1:__ Summary of Waste Arising during Construction Phase                                                                                                      7-7

Table 7.2:__ Estimation of General Refuse Generation during Operation Phase                                                                                 7-8

 

Table 8.1:__ Review of Aerial Photographs                                                                                                                                                  8-2

Table 8.2:__ Summary of Potential Land Contamination Impact                                                                                                             8-3

 

Table 9.1:__ Ecological Field Survey Schedule                                                                                                                                           9-4

Table 9.2:__ Aquatic habitats of the sampling points                                                                                                                                  9-6

Table 9.3:__ Habitats Present in the Study Area (excluding the Project Site)                                                                                         9-8

Table 9.4:__ Habitats Present in the Project Site                                                                                                                                          9-8

Table 9.5:__ Avifauna species of conservation interest recorded within Study Area                                                                            9-20

Table 9.6:__ Nest numbers, species type and plant species used as nesting substrate at Man Kam To Road Egretry

(MKT Egretry) and its satellite (MKT Satellite Egretry) recorded between April and July 2015                                                           9-23

Table 9.7:__ Mammal species of conservation interest recorded within the Study Area                                                                     9-25

Table 9.8:__ Herpetofauna species of conservation interest recorded within the Study Area                                                            9-27

Table 9.9:__ Butterfly species of conservation interest recorded within the Study Area                                                                      9-29

Table 9.10:_ Ecological Evaluation of Plantation                                                                                                                                         9-32

Table 9.11:_ Ecological Evaluation of Orchard                                                                                                                                             9-33

Table 9.12: _ Ecological Evaluation of Shrubland                                                                                                                                       9-33

Table 9.13:_ Ecological Evaluation of Secondary Woodland                                                                                                                    9-34

Table 9.14:_ Ecological Evaluation of Grassland/Shrubland                                                                                                                     9-34

Table 9.15:_ Ecological Evaluation of Grassland                                                                                                                                         9-35

Table 9.16:_ Ecological Evaluation of Seasonally Wet Grassland                                                                                                           9-36

Table 9.17:_ Ecological Evaluation of Agricultural Land                                                                                                                            9-36

Table 9.18:_ Ecological Evaluation of Watercourse                                                                                                                                    9-37

Table 9.19:_ Ecological Evaluation of Channelised Watercourse                                                                                                            9-37

Table 9.20:_ Ecological Evaluation of Pond                                                                                                                                                  9-38

Table 9.21:_ Ecological Evaluation of Developed Area                                                                                                                              9-38

Table 9.22:_ Ecological Evaluation of Flora Species of Conservation Interest                                                                                      9-39

Table 9.23:_ Ecological Evaluation of Fauna Species of Conservation Interest recorded during Field Survey within

the Project Site                                                                                                                                                                                                     9-41

Table 9.24:_ Ecological Evaluation of Fauna Species of Conservation Interest recorded during Field Survey within

the Study Area (excluding the Project Site)                                                                                                                                                    9-42

Table 9.25:_ Ecological Evaluation of Fauna Species of Conservation Interest recorded within

the Study Area from Literature Review                                                                                                                                                           9-44

Table 9.26:_ Summary of Habitat Loss within the Project Site in the worst case scenario                                                                  9-49

Table 9.27:_ Evaluation of Habitat Loss                                                                                                                                                         9-50

Table 9.28:_ Direct Impact on Flora Species of Conservation Interest                                                                                                    9-51

Table 9.29:_ Evaluation of Disturbance Impact on Fauna Species of Conservation Interest                                                              9-53

Table 9.30:_ Evaluation of Disturbance Impact on Man Kam To Egretry                                                                                                9-55

Table 9.31:_ Evaluation of Reduction of Ecological Carrying Capacity                                                                                                   9-55

Table 9.32:_ Evaluation of Indirect Ecological Impacts of Potential Changes in Water Quality as a result of Surface Runoff     9-56

Table 9.33:_ Evaluation of Disturbance Impact during Operation Phase                                                                                                9-56

 

Table 10.1:   Impact significance – relationship between sensitivity and magnitude of change                                                        10-4

Table 10.2:   Impact significance – relationship between sensitivity and magnitude of change                                                        10-7

Table 10.3:   Summary of existing trees within the Project Site (in order of decreasing abundance)                                                10-9

Table 10.4:  Summary of existing trees within and adjacent to the Project boundary along Kong Nga Po Road

(in order of decreasing abundance)                                                                                                                                                                10-10

Table 10.5:_ Sensitivity of Identified Landscape Resources                                                                                                                      10-20

Table 10.6:_ Sensitivity of Identified Landscape Character Areas                                                                                                           10-26

Table 10.7:_ Sensitivity of Visually Sensitive Receivers                                                                                                                             10-29

Table 10.8:_ Potential Landscape Impacts of Individual Refinement Layout Options                                                                          10-31

Table 10.9:_ Potential Landscape Impacts of Access Options                                                                                                                  10-32

Table 10.10: Magnitude of Change in Views for VSRs_                                                                                                                             10-44

Table 10.11: Proposed Visual Enhancement and Landscape Mitigation Measures – Construction Phase                                     10-46

Table 10.12: Proposed Visual Enhancement and Landscape Mitigation Measures – Operation Phase                                          10-49

Table 10.13: Indicative Mitigation Planting                                                                                                                                                    10-53

Table 10.14: Significance of Landscape Impacts in Construction and Operation Phases                                                                  10-59

Table 10.15: Significance of Visual Impacts in Construction and Operation Phases                                                                           10-70

 

Table 11 1:_ Meteorological Data (1996)                                                                                                                                                       11-10

Table 11 2:_ Meteorological Data (2011-2014 average data)                                                                                                                   11-11

Table 11 3:_ Population within the proposed site                                                                                                                                         11-13

Table 11 4:_ Latest Schedule of OWTF2                                                                                                                                                        11-14

Table 11 5:_ The change of major population group in consultation zone                                                                                             11-15

Table 11 6:_ Definition of Time periods                                                                                                                                                         11-16

Table 11 7:_ Traffic Variation at Different Time Periods at Major Traffic Stations (ATC 2014)                                                           11-17

Table 11 8:_ Physical Properties of petrol and diesel                                                                                                                                 11-26

Table 11 9:_ Properties of kerosene (Jet A1)                                                                                                                                                11-27

Table 11 10: Event frequencies with Implementation of Previous Identified Risk Mitigation Measures                                           11-32

Table 11 11: Accident rate summary from IATA report 2014                                                                                                                     11-33

Table 11 12: Percentage of accidents related to Takeoff/climb and approach/landing phase of a flight                                         11-33

Table 11 13: Air Traffic Movements at HKIA                                                                                                                                                  11-34

Table 11 14: Helicopter crash frequencies for different equipments in OWTF2                                                                                    11-35

Table 11 15: Serious and Fatal Vehicle involvements for Medium /Heavy Goods Vehicles                                                               11-36

Table 11 16: Spontaneous failure frequencies as adopted from OWTF2 EIA report                                                                            11-36

Table 11 17: Assumptions used in FTA                                                                                                                                                          11-37

Table 11 18: Result of Fault Tree Analysis                                                                                                                                                     11-38

Table 11 19: Ignition and Explosion Probabilities for Biogas Releases                                                                                                   11-38

Table 11 20: Ignition Probability of petrol                                                                                                                                                       11-39

Table 11 21: Release scenarios to be included in this HA                                                                                                                          11-41

Table 11 22: Chlorine toxicity relationship                                                                                                                                                     11-42

Table 11 23: Cloud Height Adopted for Release Events                                                                                                                             11-42

Table 11 24: End Point Criteria for explosion risk                                                                                                                                        11-44

Table 11 25: Consequence distances adopted from OWTF2 EIA report                                                                                                 11-44

Table 11 26: Maximum pool radius for an un-bunded pool fire in DG store                                                                                           11-46

Table 11 27: Consequence distances for the hazardous scenarios of kerosene road tanker                                                            11-47

Table 11 28: Consequence distances for the hazardous scenarios of petrol/diesel filling station                                                     11-49

Table 11 29: Summary of uncertainty analysis                                                                                                                                             11-54

Table 11 30: Summary of uncertainty analysis for OWTF2                                                                                                                        11-55

Table 11 31: Summary of uncertainty analysis for proposed police facility                                                                                            11-55

 

Table 12.1:   Summary of Environmental Impacts of Police Facilities in Kong Nga Po                                                                       12-10

 

Table 14.1:   Implementation Schedule of Recommended Mitigation Measures                                                                                  14-1

List of Figures

 

Figure 2.1              Project Layout

Figure 2.1a            Indicative Police Facilities Layout Arrangement

Figure 2.2              Existing Police Facilities to be Relocated

Figure 2.3              Preliminary Layout

Figure 2.4              Refinement Layout – Option 1

Figure 2.5              Refinement Layout – Option 2

Figure 2.6              Refinement Layout – Option 3

Figure 2.7              Access Options

Figure 2.8              Location of Concurrent Projects

 

Figure 3.1              Location of Air Sensitive Receivers Outside Project Site

Figure 3.2              Location of Air Sensitive Receivers Within Project Site

Figure 3.3              Relevant ASRs Located at Relevant PATH Grids

Figure 3.4              Location of Potential Construction Dust Emission Area Sources (Tier 1)

Figure 3.5              Location of Potential Construction Dust Emission Line Sources (Tier 1)

Figure 3.6              Location of Potential Dust Emission Sources from Concurrent Projects

Figure 3.7              (Not used)

Figure 3.8              (Not used)

Figure 3.9              (Not used)

Figure 3.10           Road Links within 500m Assessment Area

Figure 3.11           Location of ISCST3 Emission Sources

Figure 3.12           Location of Air Sampling Points

Figure 3.13           (Not used)

Figure 3.14           Cumulative Result – Contour of Tier 1 Hourly TSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Unmitigated)

Figure 3.15           Cumulative Result – Contour of Tier 1 10th Maximum Daily RSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Unmitigated)

Figure 3.16           Cumulative Result – Contour of Tier 1 10th Maximum Daily FSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Unmitigated)

Figure 3.17           Cumulative Result – Contour of Tier 1 Hourly TSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Mitigated)

Figure 3.18           Cumulative Result – Contour of Tier 1 10th Maximum Daily RSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Mitigated)

Figure 3.19           (Not used)

Figure 3.20           (Not used)

Figure 3.21           (Not used)

Figure 3.22           (Not used)

Figure 3.23           (Not used)

Figure 3.24           Cumulative Result – Contour of Annual RSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Unmitigated)

Figure 3.25           Cumulative Result – Contour of Annual FSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Unmitigated)

Figure 3.26           Cumulative Result – Contour of Annual RSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Mitigated)

Figure 3.27           Cumulative Result – Contour of Annual FSP Concentration (µg/m3) at 1.5m above ground during Construction Phase (Mitigated)

Figure 3.28           (Not used)

Figure 3.29           Cumulative Result– Contour of 19th Maximum Hourly NO2 Concentration (µg/m3) at 1.5m above ground during Operational Phase (With CHP of OWTF2)

Figure 3.30           Cumulative Result– Contour of 19th Maximum Hourly NO2 Concentration (µg/m3) at 1.5m above ground during Operational Phase (With Flare of OWTF2)

Figure 3.31           Cumulative Result– Contour of Annual NO2 Concentration (µg/m3) at 1.5m above ground during Operational Phase (With CHP of OWTF2)

Figure 3.32           Cumulative Result– Contour of Annual NO2 Concentration (µg/m3) at 1.5m above ground during Operational Phase (With Flare of OWTF2)

Figure 3.33           Cumulative Result– Contour of 10th Maximum Daily RSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With CHP and Odour Treatment Unit of OWTF2)

Figure 3.34           Cumulative Result– Contour of 10th Maximum Daily RSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With Flare and Odour Treatment Unit of OWTF2)

Figure 3.35           Cumulative Result– Contour of Annual RSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With CHP and Odour Treatment Unit of OWTF2)

Figure 3.36           Cumulative Result– Contour of Annual RSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With Flare and Odour Treatment Unit of OWTF2)

Figure 3.37           Cumulative Result– Contour of 10th Maximum Daily FSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With CHP and Odour Treatment Unit of OWTF2)

Figure 3.38           Cumulative Result– Contour of 10th Maximum Daily FSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With Flare and Odour Treatment Unit of OWTF2) 

Figure 3.39           Cumulative Result– Contour of Annual FSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With CHP and Odour Treatment Unit of OWTF2)

Figure 3.40           Cumulative Result– Contour of Annual FSP Concentration (µg/m3) at 1.5m above ground during Operational Phase (With Flare and Odour Treatment Unit of OWTF2) 

Figure 3.41           Odour Testing Results and Wind Directions on Two Typical Hot Days

Figure 3.42           Topography of Existing Condition and the Project Development

Figure 3.43           Cross-Section of Topography of Existing Condition and the Project Development

 

Figure 4.1             Noise Impact Assessment Area and Locations of Representative Noise Sensitive Receivers (Fixed Noise)

Figure 4.2             Noise Impact Assessment Area and Locations of Representative Noise Sensitive Receivers (Construction Noise)

Figure 4.3             Photos of Representative Noise Sensitive Receivers (NSRs)

Figure 4.4             Schematic Configuration of Movable Noise Barrier for PME

Figure 4.5             Schematic Configuration of Full Noise Enclosure for PME

Figure 4.6             Noise Impact Assessment Area and Locations of Representative Noise Sensitive Receivers (Road Traffic Noise)

Figure 4.7             Locations of Proposed Fixed Plant Noise Sources

Figure 4.8             Noise Impact Assessment Area and Locations of Representative Noise Sensitive Receivers (Helicopter Noise)

Figure 4.9             Noise Contours for Helicopter Noise Impacts during Day-time Period (Day-time – Operation Mode 1 – 8)

 

 

Figure 5.1             Water Quality Impact Assessment Area and Water Sensitive Receivers

Figure 5.2             Indicative Drainage Routing during Construction Phase

 

Figure 6.1             Existing Sewerage System

Figure 6.2             Proposed Sewerage System

 

Figure 8.1             Location of Site Photographs

 

Figure 9.1             Project Site, Assessment Area, Survey Transect and Sampling Location

Figure 9.2a-d        Habitat Map and Species of Conservation Significance

Figure 9.3             Indicative Extent of Egretry

 

Figure 10-01         Aerial Photograph

Figure 10-02         Future Planning Context

Figure 10-03         Landscape Resources Plan

Figure 10-04         Landscape Resource Photographs

Figure 10-05         Landscape Resource Photographs

Figure 10-06         Landscape Character Area Plan

Figure 10-07         Landscape Character Area Photographs

Figure 10-08         Landscape Character Area Photographs

Figure 10-09         Landscape Character Area Photographs 

Figure 10-10         Landscape Character Area Photographs

Figure 10-11         Visual Envelope and Visually Sensitive Receivers

Figure 10-12         Visual Envelope and Visually Sensitive Receivers

Figure 10-13         Existing VSR Views

Figure 10-14         Existing VSR Views

Figure 10-15         Existing VSR Views

Figure 10-16         Existing VSR Views

Figure 10-17         Existing VSR Views

Figure 10-18         Existing VSR Views

Figure 10-19         Preliminary Landscape Master Plan 

Figure 10-20         Preliminary Landscape Master Plan

Figure 10-21         Landscape and Visual Mitigation Measures – Plan

Figure 10-22         Landscape and Visual Mitigation Measures – Plan

Figure 10-23         Landscape and Visual Mitigation Measures – Plan

Figure 10-24         Landscape and Visual Mitigation Measures – Oblique Aerial View

Figure 10-25         Landscape and Visual Mitigation Measures – Sections

Figure 10-26         Landscape and Visual Mitigation Measures – Sections

Figure 10-27         Landscape and Visual Mitigation Measures – Sections

Figure 10-28         Landscape and Visual Mitigation Measures – Sections

Figure 10-29         Landscape and Visual Mitigation Measures – Sections

Figure 10-30         Landscape and Visual Mitigation Measures – Sections

Figure 10-31         Landscape and Visual Mitigation Measures – Sections

Figure 10-32         Landscape and Visual Mitigation Measures – Sections

Figure 10-33         Landscape and Visual Mitigation Measures – Sections

Figure 10-34         Landscape and Visual Mitigation Measures – Sections

Figure 10-35         Residual Impacts on Landscape Resources during Construction and Operation

Figure 10-36         Residual Impacts on Landscape Character Areas during Construction and Operation

Figure 10-37         Residual Visual Impacts during Construction and Operation

Figure 10-38         Vantage Points for Photomontages

Figure 10-39         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-40         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-41         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-42         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-43         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-44         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-45         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-46         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-47         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-48         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-49         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-50         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-51         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-52         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-53         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-54         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-55         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-56         Landscape and Visual Mitigation Measures – Photomontage

Figure 10-57        Proposed Viaduct Section along Improved Kong Nga Po Road

 

Figure 11.1           Detailed location arrangement inside the proposed site

Figure 11.2           QRA Flow Chart  

Figure 11.3           Societal Risk Guidelines   

Figure 11.4           Road Markings within SSWTW

Figure 11.5           Barrier in the north-western corner of SSWTW

Figure 11.6           Wind rose adopted in this study (2011-2014 average)

Figure 11.7           Padding material to prevent bouncing back of ricochet

Figure 11.8           Fuel road tanker transport route to be assessed

Figure 11.9           Aircraft Crash Coordinate System

Figure 11.10         Distance between proposed helipad and OWTF2 storage        

Figure 11.11         Relative Position of non-fuel gas facilities within the site

List of Appendices

 

Appendix 2.1        Tentative Construction Programme

 

Appendix 3.1        Calculation of Dust Suppression Efficiency

Appendix 3.2        Estimation of Particle Size Distribution

Appendix 3.3        Details of Dust Emission Sources for 1-hour TSP, Daily RSP and Daily FSP (Tier 1)

Appendix 3.4        Estimation of Active Area Percentages for Key Construction Activities (Annual)

Appendix 3.5        (Not used)

Appendix 3.6        Data Input file for Hourly TSP, Daily RSP and Daily FSP (Tier 1)

Appendix 3.7        (Not used)

Appendix 3.8        Details of Dust Emission Sources for Annual RSP and Annual FSP

Appendix 3.9        Data Input file for Annual RSP and Annual FSP

Appendix 3.10      Letter from Transport Department regarding Traffic Forecast Data

Appendix 3.11      24-Hour Traffic Pattern

Appendix 3.12      Vehicle Age Distribution in Base Year 2010

Appendix 3.13      Road Profile of Road Links within 500m Study Area

Appendix 3.14      24-hour VKT values for All Vehicle Classes in each of the Model years 2023, 2028, 2033 and 2038

Appendix 3.15      Trip Estimation

Appendix 3.16      24-hour Variations of Annual Averages of Temperature and Relative Humidity

Appendix 3.17      24-hour Speed Fractions

Appendix 3.18      Calculation of Emission Factors for Each Model year

Appendix 3.19      Composition Emission Factor in Year 2023

Appendix 3.20      Letter from EPD regarding Chimney

Appendix 3.21      Model Parameters for ISCST3

Appendix 3.22      (Not used)

Appendix 3.23      Detail Odour Patrol and Testing Report

Appendix 3.24      Tier 1 Hourly TSP, Daily RSP and Daily FSP Screening Results for Unmitigated and Mitigated Scenarios

Appendix 3.25      (Not used)

Appendix 3.26      Annual RSP and FSP Results for Unmitigated and Mitigated Scenarios

Appendix 3.27      (Not Used)

Appendix 3.28      Cumulative Results for NO2, RSP and FSP during Operational Phase (for Year 2023 Vehicular and Chimney Emission and Year 2020 Background Concentration)

 

Appendix 4.1        Unmitigated Construction Plant Inventory and Noise Impact Assessment

Appendix 4.2        Mitigated Construction Plant Inventory and Noise Impact Assessment

Appendix 4.3        Extent of Proposed Project Road

Appendix 4.4        Letter from Transport Department regarding Traffic Forecast Data

Appendix 4.5        Traffic Forecast Data and Key Plan for Road Traffic Noise Impact Assessment

Appendix 4.6        Predicted Road Traffic Noise Levels for Unmitigated Scenario (Year 2038)

Appendix 4.7        Correspondence between Mott MacDonald and HKPF

Appendix 4.8a      Gunshot Noise Measurement Results

Appendix 4.8b      Fixed Noise Sources Impact Assessment

Appendix 4.9        Correspondence between Mott MacDonald and GFS

Appendix 4.10      Helicopter Noise Impact Assessment

Appendix 4.11      Literature Review of Overseas / International Noise Criteria for Emergency Helicopter Operations during Evening and Night-time Periods

 

Appendix 6.1        Proposed Sewer Pipeline Design

 

Appendix 8.1        Representative Historical Aerial Photographs

Appendix 8.2        Responses from Government Departments on Relevant Information

Appendix 8.3        Site Photographs

 

Appendix 9.1        Plates

Appendix 9.2        List of Flora recorded within the Study Area

Appendix 9.3        List of Fauna recorded within the Study Area

 

Appendix 10.1      Broad-Brush Tree Survey

 

Appendix 11.1      Some Information Extracted from the Reassessment Study

Appendix 11.2      Kerosene Transport Route

Appendix 11.3      Photos of Kerosene Truck used by GFS

Appendix 11.4      Fault Tree Analysis

Appendix 11.5      Event Tree Analysis in OWTF2

Appendix 11.6      Population Considered in this Assessment

Appendix 11.7      Individual Risk Results

Appendix 11.8      Societal Risk Results

Appendix 11.9      Cumulative Risk Assessment Result


 

Abbreviations

 

ADWF

Average Dry Weather Flows

AFCD

Agriculture, Fisheries and Conservation Department

ALARP

As Low As Reasonably Practicable

ANLs

Acceptable Noise Levels

APCO

Air Pollution Control Ordinance

APR

Approach

AQOs

Air Quality Objectives

AQUALINE

 

ArchSD

Architectural Services Department

ASR

Air Sensitive Receiver (Air quality)

Area Sensitive Rating (Noise)

ATC

Annual Traffic Census

BCP

Border Crossing Point

BLEVE

Boiling Liquid Expanding Vapour Explosion

BOD5

5-Day Biochemical Oxygen Demand

C&D

Construction and Demolition

CAP

Contamination Assessment Plan

CAR

Contamination Assessment Report

CBD

United Nations Convention on Biological Diversity

CEDD

Civil Engineering and Development Department

CFA

Court of Final Appeal

CFD

Computational Fluid Dynamics

CHP

Combined Heat and Power

CIA

Chemical Industry Association

CITES

Convention on International Trade in Endangered Species of Wild Fauna and Flora

CNL

Corrected Noise Level

CNP

Construction Noise Permit

CO

Carbon Monoxide

COD

Chemical Oxygen Demand

CPLD

Committee on Planning and Land Department

CRTN

Calculation of Road Traffic Noise

C&SD

Census and Statistics Department

CWPs

Chemical Waste Producers

CZ

Consultation Zone

DC

Distance Attenuation

DG

Dangerous Goods

DNV

Det Norske Veritas

DO

Dissolved Oxygen

DRIFT

Dense Releases Involving Flammables or Toxics

E.coli

Escherichia coli

EIA

Environmental Impact Assessment

EIAO

Environmental Impact Assessment Ordinance

EIAO-TM

Technical Memorandum on Environmental Impact Assessment Process

EM&A

Environmental Monitoring and Audit

EMSD

Electrical and Mechanical Services Department

EPD

Environmental Protection Department

ETA

Event Tree Analysis

EU

European Union

EV

Electric Vehicle

FC

Façade Correction

FCA

Frontier Closed Area

FDM

Fugitive Dust Model

FLN

Fanling North

FLN NDA

Fanling North New Development Area

FN

Frequency/Number of Fatality

FNFSR

Fanling North Freshwater Service Reservoir

FRP

Fire Resistant Rating

FSD

Fire Services Department

FSP

Fine Suspended Particulates

FTA

Fault Tree Analysis

GB

Green Belt

GESF

Guidelines for Estimated Sewage Flow

GFS

Government Flying Service

GMP

Greening Master Plan

GMPNET

Greening Master Plan for Northwest New Territories

GW-TM

Technical Memorandum on Noise from Construction Work other than Percussive Piling

HA

Hazard Assessment

HAZOP

Hazard and Operability Study

HKBWS

Hong Kong Bird Watching Society

HKIA

Hong Kong International Airport

HKO

Hong Kong Observatory

HKPF

Hong Kong Police Force

HKPSG

Hong Kong Planning Standards and Guidelines

HKSAR

Hong Kong Special Administrative Region

HOKLAS

Hong Kong Laboratory Accreditation Scheme

HQ

Head Quarter

HSE

Health and Safety Executive

HyD

Highways Department

IATA

International Air Transport Association

ICAO

International Civil Aviation Organization

ICL

Initial Climb

IFs

Influencing Factors

I/M

Inspection and Maintenance

IND-TM

Technical Memorandum for the Assessment of Noise from Places other than Domestic Premises, Public Places or Construction Sites

ISCST3

Industrial Source Complex – Short Term Version 3

JSP

Joint Service Publication

KNP

Kong Nga Po

KTN

Kwu Tung North

LCAs

Landscape Character Areas

LD

Lethal Dose

LIA

Landscape Impact Assessment

LND

Landing

LPG

Liquefied Petroleum Gas

LRs

Landscape Resources

LWFR

Lo Wu Firing Range

MHIDAS

Major Hazard Incident Data Service

MMIS

Modified Mercalli Intensity Scale

MTLFR

Ma Tso Lung Firing Range

NCO

Noise Control Ordnance

NT North

New Territories North

NTNE

New Territories North East

NENT NDA

North East New Territories New Development Area

NO2

Nitrogen Dioxide

NOx

Nitrogen Oxides

NOISE

National Organization to Insure a Sound-controlled Environment

NRMM

Non-road mobile machinery

NSR

Noise Sensitive Receiver

O3

Ozone

OLM

Ozone Limiting Method

OVT

Old and Valuable Tree

OWTF2

Organic Waste Treatment Facilities Phase 2

OZP

Outline Zoning Plan

PATH

Pollutants in the Atmosphere and their Transport over Hong Kong

PC

Private Cars

Pcif

Catchment Inflow Factor

PD&TTF

Police Driving and Traffic Training Facilities

PDAs

Potential Development Areas

PFC

Public Fill Committee

PFRFs

Public Fill Reception Facilities

PHI

Potentially Hazardous Installation

PME

Powered Mechanical Equipment

PNL

Predicted Noise Level

PRC

People’s Republic of China

PRD

Pearl River Delta

PRDEZ

Pearl River Delta Economic Zone

PS

Pumping Station

PTF

Proposed Police Training Facility

PTU

Police Tactical Unit

QRA

Quantitative Risk Assessment

RAP

Remediation Action Plan

RBRGs

Risk-based Remediation Goals

RC

Reinforced Concrete

RCV

Refuse Collection Vehicle

RR

Remediation Report

RSP

Respirable Suspended Particulates

TD

Transport Department

TPDM

Transport Planning and Design Manual

TSP

Total Suspended Particulate

SE

South-east

SBF

Second Boundary Fence

SIL(E)

South Island Line (East)

SPL

Sound Pressure Level

SO2

Sulfur Dioxide

SS

Suspended Solids

SSSI

Site of Special Scientific Interest

SULFR

San Uk Ling Firing Range

SSWTW

Sheung Shui Water Treatment Works

SWHSTW

Shek Wu Hui Sewage Treatment Works

SWL

Sound Power Level

TM-DSS

Technical Memorandum on Standards for Effluents Discharged into Drainage and Sewerage Systems

TOF

Takeoff

UFF

Unit Flow Factors

USEPA

US Environmental Protection Agency

US FAA

US Federal Aviation Agency

VE

Visual Envelope

VOCs

Volatile Organic Compounds

VKT

Vehicle Kilometre Travelled

VSRs

Visual Sensitive Receivers

WCZs

Water Control Zones

WDO

Waste Disposal Ordinance

WMP

Waste Management Plan

WPCO

Water Pollution Control Ordinance

WQOs

Water Quality Objectives

WSD

Water Supplies Department

WTF

Weapons Training Facilities

VPs

Vantage Points

ZVIs

Zones of Visual Influence