Environmental Protection Department

 

West New Territories (WENT) Landfill Extensions

 

Environmental Impact Assessment Report

 

Contents

 

 

1       INTRODUCTION

2       DESCRIPTION OF PROJECT

3       AIR QUALITY IMPACT                                                                                                        

4       NOISE IMPACT

5       WATER QUALITY IMPACT                                                                                                  

6       WASTE MANAGEMENT IMPLICATIONS                                                                              

7       LANDFILL GAS HAZARD ASSESSMENT                                                                             

8       IMPACT ON LANDSCAPE AND VISUAL                                                                              

9       IMPACT ON CULTURAL HERITAGE                                                                                    

10        ECOLOGICAL IMPACT                                                                                                       

11        POTENTIAL ENVIRONMENTAL IMPACT ASSOCIATED WITH PULVERIZED FUEL ASH

12        ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS                                           

13        3-DIMENSIONAL EIA                                                                                                           

14        CONCLUSION                                                                                                                     

         

 

Appendices

 

Appendix 2.1        Tentative Outline Programme

 

Appendix 3.1a      Past Monitoring Record for the Removal Efficiency of Flaring System

Appendix 3.1b      Past 10-year Odour Complaint Records

Appendix 3.2        Adjustment of Background NO2, SO2 and RSP at Black Point Power Station and Castle Peak Power Station

Appendix 3.3        Detailed Calculations of Dust Emission Rate

Appendix 3.4        Detailed Calculations of Vehicular Emission Rate

Appendix 3.5        Detailed Calculations of Emissions from WENT Landfill Extension, Existing WENT Landfill, and Marine Vessels

Appendix 3.6        Emission Inventory

Appendix 3.7        Odour Measurement Results

Appendix 3.8        Odour Modelling Parameter and Detailed Calculations of Odour Emissions from Deodouriser Units

Appendix 3.9        Detailed Results of Construction Dust Assessment

Appendix 3.10      Detailed Assessment Results of AQO Pollutants

Appendix 3.11      Detailed Assessment Results of Non-AQO Pollutants

 

Appendix 4.1        Construction Plant Inventory and SWLs

Appendix 4.2a      Construction Noise Impacts

Appendix 4.2b      Cumulative Construction Noise Impacts

Appendix 4.3        Road Traffic Noise Calculation

Appendix 4.4        Operation Noise Calculation

Appendix 4.5        Path Difference for Barges

 

Appendix 5.1        Groundwater monitoring data of Existing WENT Landfill in 2006 and 2007

Appendix 5.2        Groundwater measurement results for WENT Landfill Extension

Appendix 5.3        Meteorological Data

Appendix 5.4        Leachate Generation for Existing WENT Landfill

 

Appendix 6.1        Summary Table for Waste Management

Appendix 6.2        Waste Management Plan

 

Appendix 7.1        Gas Monitoring Data from 2002 to 2006 of Existing WENT Landfill

Appendix 7.2        Chapter 8 of LFG Guidance Note

Appendix 7.3        Landfill Gas Protection Measures in Existing WENT Landfill

Appendix 7.4        Specific Landfill Gas Protection Measures for Building Services

 

Appendix 9.1        Photos

Appendix 9.2        Grave Record

Appendix 9.3        Tables

 

Appendix 10.1      Survey frequency for various taxa

Appendix 10.2      Plant Species Recorded within the Study Area

Appendix 10.3      Avifauna Recorded in the Study Area

Appendix 10.4      Dragonfly Recorded in the Study Area

Appendix 10.5      Butterfly Recorded in the Study Area

Appendix 10.6      Herpetofauna & Mammals Recorded in the Study Area

Appendix 10.7      Aquatic Fauna & Intertidal Fauna Recorded during the present study

 

Figures

 

Figure 1.1             Location Plan

 

Figure 2.1             Layout Option 1

Figure 2.2             Layout Option 2

Figure 2.3             Layout Option 3

Figure 2.4             Layout Option 4

Figure 2.5             Layout Option 5

Figure 2.6             Site Formation Phasing Plan

Figure 2.7             Layout Option 4A

 

Figure 3.1             Existing WENT Landfill Dust Monitoring Locations ASR 4 & ASR 13

Figure 3.2             Existing WENT Landfill VOC Monitoring Locations OM2 to OM5

Figure 3.3             Air Sensitive Receivers

Figure 3.4a           Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 1 – Scenario 1A)

Figure 3.4b           Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 1 – Scenario 1B)

Figure 3.4c           Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 2 + Phase 3 – Scenario 2A)

Figure 3.4d           Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 2 + Phase 3 – Scenario 2B)

Figure 3.4e           Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 2 + Phase 3 – Scenario 2C)

Figure 3.4f            Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 4 + Phase 5 – Scenario 3A)

Figure 3.4g           Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 4 + Phase 5 – Scenario 3B)

Figure 3.4h           Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 1 – Scenario 1)

Figure 3.4i            Dust Emission Source Locations (Contribution from WENT Landfill Extension – Scenario 1)

Figure 3.4j            Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 2 + Phase 3 – Scenario 2)

Figure 3.4k           Dust Emission Source Locations (Contribution from WENT Landfill Extension – Scenario 2)

Figure 3.4l            Dust Emission Source Locations (Existing WENT Landfill + WENT Landfill Extension Phase 4 + Phase 5 – Scenario 3)

Figure 3.4m          Dust Emission Source Locations (Contribution from WENT Landfill Extension – Scenario 3)

Figure 3.5a           Locations of Potential Emission Sources

Figure 3.5b           NO2 & SO2 Emission Sources Location

Figure 3.6             Locations of Deodouriser Units

Figure 3.7a           Locations of Tipping Faces

Figure 3.7b           Locations of Tipping Faces (with Mitigation)

Figure 3.8a-1        Contours of 1-hour TSP Concentration at 1.5m above Ground (Scenario 1A)

Figure 3.8a-2        Contours of 24-hour TSP Concentration at 1.5m above Ground (Scenario 1A)

Figure 3.8a-3        Contours of 1-hour TSP Concentration at 1.5m above Ground (Scenario 1B)

Figure 3.8a-4        Contours of 24-hour TSP Concentration at 1.5m above Ground (Scenario 1B)

Figure 3.8a-5        Contours of Annual TSP Concentration at 1.5m above Ground (Scenario 1)

Figure 3.8a-6        Contours of Annual TSP Concentration at 1.5m above Ground (Scenario 1 – WENT Extension only)

Figure 3.8a-7        Contours of Contribution of WENT Extension to Annual TSP Concentration at 1.5m above Ground (Scenario 1)

Figure 3.8a           Contours of 1-hour TSP Concentration at 1.5m above Ground (Scenario 2A)

Figure 3.8b           Contours of 24-hour TSP Concentration at 1.5m above Ground (Scenario 2A)

Figure 3.8c           Contours of 1-hour TSP Concentration at 1.5m above Ground (Scenario 2B)

Figure 3.8d           Contours of 24-hour TSP Concentration at 1.5m above Ground (Scenario 2B)

Figure 3.8d-1        Contours of 1-hour TSP Concentration at 1.5m above Ground (Scenario 2C)

Figure 3.8d-2        Contours of 24-hour TSP Concentration at 1.5m above Ground (Scenario 2C)

Figure 3.8e           Contours of Annual TSP Concentration at 1.5m above Ground (Scenario 2)

Figure 3.8f            Contours of Annual TSP Concentration at 1.5m above Ground (Scenario 2 – WENT Extension only)

Figure 3.8g           Contours of Contribution of WENT Extension to Annual TSP Concentration at 1.5m above Ground (Scenario 2)

Figure 3.8h           Contours of 1-hour TSP Concentration at 1.5m above Ground (Scenario 3A)

Figure 3.8i            Contours of 24-hour TSP Concentration at 1.5m above Ground (Scenario 3A)

Figure 3.8j            Contours of 1-hour TSP Concentration at 1.5m above Ground (Scenario 3B)

Figure 3.8k           Contours of 24-hour TSP Concentration at 1.5m above Ground (Scenario 3B)

Figure 3.8l            Contours of Annual TSP Concentration at 1.5m above Ground (Scenario 3)

Figure 3.8m          Contours of Annual TSP Concentration at 1.5m above Ground (Scenario 3 – WENT Extension only)

Figure 3.8n           Contours of Contribution of WENT Extension to Annual TSP Concentration at 1.5m above Ground (Scenario 3)

Figure 3.9a           Contours of 1-hour NO2 Concentration at 1.5m above Ground

Figure 3.9b           Contours of 1-hour SO2 Concentration at 1.5m above Ground

Figure 3.9c           Contours of 24-hour NO2 Concentration at 1.5m above Ground

Figure 3.9d           Contours of 24-hour SO2 Concentration at 1.5m above Ground

Figure 3.9e           Contours of 24-hour RSP Concentration at 1.5m above Ground

Figure 3.9f            Contours of Annual NO2 Concentration at 1.5m above Ground

Figure 3.9g           Contours of Annual SO2 Concentration at 1.5m above Ground

Figure 3.9h           Contours of Annual RSP Concentration at 1.5m above Ground

Figure 3.10a         Contours of Odour Concentration at 1.5m above Ground (Scenario 1)

Figure 3.10b         Contours of Odour Concentration at 1.5m above Ground (Scenario 2 with Mitigation)

Figure 3.10c         Contours of Odour Concentration at 1.5m above Ground (Scenario 3)

Figure 3.10d         Contours of Odour Concentration at 1.5m above Ground (Scenario 4 with Mitigation)

Figure 3.10e         Contours of Odour Concentration at 1.5m above Ground (Scenario 5 with Mitigation)

 

Figure 4.1             Locations of NSRs

Figure 4.2a           Notional Distance from NSR-1

Figure 4.2b           Notional Distance from NSR-2

Figure 4.3             Off-site Receivers along Lung Kwu Tan Road

Figure 4.4             Distances of NSR-1 from Barges and Plants

Figure 4.5             Existing Berths and Noise Bund

Figure 4.6             Screening Effect for Tipping Activities

 

Figure 5.1             Groundwater Monitoring Stations at Existing WENT Landfill

Figure 5.2             Marine Water Quality Monitoring Stations (DM4, DM5 and NM5)

Figure 5.3             River Water Monitoring Stations in Deep Bay Water Control Zone

Figure 5.4             Water Sensitive Receivers

Figure 5.4a           Proposed Drainage Layout

Figure 5.5             Groundwater Contours for WENT Landfill Extension

Figure 5.6             Schematic Diagram of the Leachate Treatment Plant

 

Figure 7.1             Geological Map

Figure 7.2             Existing WENT Landfill Gas Monitoring Locations

Figure 7.3             Landfill Liner and Final Capping Details

Figure 7.4             LFG Consultation Zone, Sensitive Receivers, Fault Lines and Indicative Location / Alignment of LFG Cut-Off Trench Barrier          

Figure 7.5             Mitigation Measures (Sealing of Fault Line)

Figure 7.6             Typical Design of LFG Cut-Off Trench Barrier

Figure 7.7             Existing Landfill and Landfill Extension Gas Monitoring Plan

 

Figure 8.1             Aerial Photo

Figure 8.2             Landscape Character Area Plan

Figure 8.3             Landscape Resource Plan

Figure 8.4             Visually Sensitive Receiver Plan

Figure 8.5             View of VSR1

Figure 8.6             View of VSR2

Figure 8.7             View of VSR3 (Sheet 1 of 2)

Figure 8.7a           View of VSR3 (Sheet 2 of 2)

Figure 8.8             View of VSR4 (Sheet 1 of 3)

Figure 8.8a           View of VSR4 (Sheet 2 of 3)

Figure 8.8b           View of VSR4 (Sheet 3 of 3)

Figure 8.9             View of VSR5 (Sheet 1 of 2)

Figure 8.9a           View of VSR5 (Sheet 2 of 2)

Figure 8.10           View of VSR6 (Sheet 1 of 2)

Figure 8.10a         View of VSR6 (Sheet 2 of 2)

Figure 8.11           View of VSR7

Figure 8.12           Landscape Plan

Figure 8.13           Tree Survey Boundary

 

Figure 9.1             Location of Cultural Heritage Survey at WENT Landfill Extension

Figure 9.2             Location of Built Heritage

Figure 9.3             Geological Map of Study Area

Figure 9.4             1963 Map of the Study Area

Figure 9.5             Previous Achaeological Works at Tsang Tsui Archaeological Site

Figure 9.6             Plan of Idendified Tsang Tsui Site and Archaeological Study Area

Figure 9.7             Controal Points for Archaeological Survey within Study Area

Figure 9.8             Distribution of 2008 Archaeological Works at Tsang Tsui

Figure 9.9             Section Profiles of Test Pits T16 to T18

Figure 9.10           Section Profiles of Test Pits T19 to T21

Figure 9.11           Section Profiles of Test Pits T22 to T24

Figure 9.12           Section Profiles of Test Pits T25 to T27

Figure 9.13           Section Profiles of Test Pits T28 to T30

Figure 9.14           Revised Boundary of Tsang Tsui Archaeological Site

 

Figure 10.1           Study area, sites/features of conservation importance and sampling locations for fauna

Figure 10.2           Habitat map and species of conservation interest

Figure 10.3           Photos of habitats and species of conservation interest

Figure 10.4           Distribution of Chinese White Dolphins in Hong Kong waters (April 2007 – March 2008) (Source AFCD 2008)

Figure 10.5           Sighting density of Chinese White Dolphin with corrected survey effort per km2 using data collected during 2002-2007 (SPSE = no. of on-effort dolphin sightings per 100 units of survey effort) (Source: AFCD 2008)

Figure 10.6           Sampling stations of the CPCC benthic survey

Figure 10.7           Proposed site for translocation of Pitcher Plant

Figure 10.8           Cross section of mitigation pond for Little Grebe