Yung Shue Wan Transfer Facility Figure 2.7A Sok Kwu Wan Transfer Facility Figure 2.7B Sok Kwu Wan Transfer Facility (Alternative Location) Operational Plans [
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Hong Kong Government Environmental Protection Department Consultancy Study for Outlying Islands Refuse Transfer Facilities o o o o o o o o o o Initial Environmental o Impact Assessment o September 1993 Aspinwall&company CONSULTANTS IN ENVIRONMENT.... L MANAGEMENT In •••oelatlon with D SCOTT WILSON KIRKPATRICK fl Agreement No. CE 35/91 Consultancy Study for Outlying Islands Refuse Transfer Facilities Studies r I [ [ I Ini tial Environmental Impact Assessment l September 1993 u 0 LIST OF CONTENT [I Page 0 1. INTRODUCTION Background 1 Context of the Initial Environmental Assessment 1 0 Scope of the IEIA 2 References 3 [I 2. THE STUDY AREA Site Description 4 Cl Environmental Setting and Land Uses 5 Nearest Sensitive Receivers 7 C 3. WASTE TRANSFER OPERATION / Waste Types and Quantities 10 [-1 Transfer Station Operation 13 References 17 U 4. SCOPE OF ASSESSMENT The Environmental Assessment Process 18 Scope of Assessment 18 ilL. __ [] 5. AIR QUALITY Introduction 20 Environmental Quality Objectives, Standards and Guidelines 20 Existing Air Quality & Monitoring Protocols 21 [I Impacts of Construction 26 Impacts of Operation 29 Joint User Development 31 Further Assessment 31 U References 31 [J 6. WATER QUALITY Introduction 33 Environmental Legislation, Standards and Guidelines 33 [J Existing Water Sediment Quality 37 Construction Impacts 42 Operational Impacts 44 Joint User Development 46 [J Further Assessment 47 , References 47 U 7. NOISE Introduction 48 [I Environmental Quality Objectives, Standards and Guidelines 48 Existing Baseline Conditions 50 [_I [! L [ Construction Impacts 57 Operational Impacts 59 Joint User Development 62 [ Further Assessment 62 References 63 [ 8. LANDSCAPE, VISUAL AND LAND USE IMPACTS Introduction 64 Landscape and Visual Context 65 0 Design Features 69 Landscape and Visual Impacts 70 Land Use Impacts 72 Areas for Further Assessment 74 0 References 74 9. TRAFFIC & MARINE TRANSPORTATION IMPACT 0 Introduction 75 Environmental Objectives, Standards and Guidelines 75 [ Impacts of Construction Traffic 75 I Impacts of Operational Traffic 79 Areas for Further Assessment 82 References 82 D 10. BIRD, RODENT AND INSECT CONTROL 0 Bird Control 83 Rodent Control 83 Insect Control 84 0 11. ENVIRONMENTAL PERFORMANCE, MONITORING AND AUDIT 0 MonitOring and Audit Requirements 85 Baseline Monitoring 86 Construction Monitoring 87 Operational Monitoring 88 0 Standards, Guidelines and Environmental Performance Criteria 89 References 89 D 12. CONCLUSIONS AND RECOMMENDATIONS Introduction 92 D Air Quality 92 Water Quality 93 Noise , 94 Landscape, Visual and Land Use Impacts 95 0 Traffic and Marine Transportation 96 Bird, Insect and Rodent Control 97 Terms of Reference 97 Cumulative Impacts 99 0 Reference 99 0 [ [ I I r~ u o n LIST OF TABLES & APPENDICES Table 2.1 Identified Nearest Existing Nearest ScnsiUve Receivers in the Vicinity of the Transfer Facility Sites o Table 2.2 Proposed Developments in the Vicinity of the Proposed Transfer Facility Sites o Table 3.1 Current Waste Arisings on the Outlying Islands Table 3.2 Future Waste Arisings on the Outlying Islands Table 3.3 Design Capacity of the Outlying Islands Transfcr Facilities Table 3.4 Construction ancl Operational Periods of the Transfer Facilities o Table 3.5 Site Operating Hours Table 5.1 Hong Kong Air Quality Objectives Table 5.2 Background Air Pollution Concentrations, Cheung Chau o Table 5.3 Background Air Pollution Concentrations, Discovery Bay Table 6.1 Water Quality Objectives for the Southern Water Control Zone [J Table 6.2 Standards of E!1luents Discharged into Inshore Waters of Southern WCZ Classification of Dreclged J\1arine Secliments for Marine Disposal Table 6.3 f Table 6.4 Standards for Efflluents Dischargecl into Foul Sewer Leading into Govermnment Sewagc Treatment Plants o Table 6.5 Relevant EPD Marine Water ~10nitoring Data - 1991 Period Table 6.6 Relevant EPD Marine SediIl1ent ]Vlonit()'-ing Data - 1991 Period Table 6.7 Marine Sedimcnt Data. Average or November 1991 and December 1992 Table 6.8 AFD Monitoring of lnncr ancl Outcr FCZ Water Quality Monitoring Dataat Sok Kwu Wan Table 6.9 Wastewater Arisings from tile Transfer Facilities Table 6.10 Estimated Contam~1ant Loadings of Wastewaters to Mui Wo Pre-treatment o Facility ~ [J Figure 6.1 Southern Water Control Zone Detlnation of Zone and Silbzone Figure 6.2 Relevant EPD Monitoring Stations Figure 6.3 Sediment Sampling Sites (Rcf 6.5) [J Figure 6.4 AFD Monitoring Locatioons - Sok Kwu Wan Figure 7.1 LocaUon of Noisc Measurcment at C1lcung Chau Figure 7.2 Location of Noise Measurement at Pcng Chau o Figure 7.3 Location of Noise Measuremcnt at Mu(Wo Figure 7.4 Location of Noise Measurement at Discovery Bay ,-. Figure 7.5 Location of Noise Measurement at Hei Ling Chall Figure 7.6 Location of Noise Measurement at YlIng Slll1e Wan lJ Figure 7.7 Location of Noise Measurement at Sok KWlI Wan [J Appendix 1 Relevant Environmental Maritime Legislation [J u u [j rl \ L [ LIST OF FIGURES & PLATES [ Figure 1.1 Outlying Islancls Rell1se Transfer Stucly Area Engine,!ring Layout Plans [ Figure 2.1 Cheung Chau Transfer Facility Figure 2.2 Peng Chau Transfer Facility Figure 2.3 Mui Wo Transfer Facility [ Figure 2.4 Discovery Day Transfer Facility Figure 2.5 Hei Ling Chau Transfer Facility Figure 2.6 Yung Shue Wan Transfer Facility Figure 2.7a Sok Kwu Wan Transfer Facility Figure 2.7b Sok Kwu Wan Transfer Facility (Alternative location) Operational Plans [ Figure 3.1 Cheung Chau Transfer Facility Figure 3.2 Peng Chau Transt"er Facility Figure 3.3 Mui Wo Transfer Facility [ Figure 3.4 Discovery Day Transrer Facility f Figure 3.5 Hei Ling Chau Transfer Facility Figure 3.6 Yung Shue Wan Transfer Facility Figure 3.7a Sok Kwu Wan Transfer'Facility C Figure 5.1 Annual Winel Roses. C11e1ll1g Chau, Chek Lap Kok and Wong Chuk Hang c Figure 6.1 Southern Water Control Zone Dcfinition of Zone and Subzone Figure 6.2 Relevant EPD Monitoring Stations Figure 6.3 Sediment Sampling Sites (Ref 6.S) Figure 6.4 AFD Monitoring Locations - Sok Kwu Wan o Figure 7.1 Location of Noise Measurcment at Cheung Chau Figure 7.2 Location of Noise Measurement at Peng Chau Figure 7.3 Location of Noise Measurement at Mui Wo o Figure 7.4 Location of Noise Measurement at Discovery Day Figure 7.5 Location of Noise Measurement at Hei Ling Chau Figure 7.6 Location of Noise Measurement at Yung Shue Wan Figure 7.7 Location of Noise Measurement at Sok Kwu Wan o Plates 8.1 to 8.3 Views of the Proposecl Transfer Facility Sites o [ c [ [ [ L u o o SUMMARY The development of the Outlying Island Transfer Facilities (OITFs) forms part of Hong Kong Govermnent's strategy for imrroved waste management throughout the territory. This involves replacing the existing and outdated waste disposal system with o purpose-designed facili ties, whereby waste transfer operations will be upgraded to provide an efficient and environmentally acceptable system for final disposal at WENT Landfill. The islands which will be served by the development of the refuse transfer o facilities include the following: o • Lantau (facilities at Discovery Bay and Mui Wo); • Cheung Chau; o • Peng Chau; • Hei Ling Chau; and c • Lamma (facilities at Sole K wu Wan and Yung Shue Wan). I This Initial Environmental Impact Assessment (IElA) has been prepared as part of the [] Outlying Islands Transfer Facilities Consultancy Agreement No. CE 35/91, and is based on the outline design of the facilities, as described in Working Paper No. 8 which has also been prepared as part of this ConSUltancy. The IEIA provides an initial assessment and evaluation of the leey environmental issues which have been identified, sufficient to set out terms of reference for a detailed Environmental Impact Assessment (EIA) to he conducted by the sllccessful tcnderer. [1 The key issues addressed in this report includc: [ • Air Quality; • Water Quality; [J • Noise; • Landscape Visual and Landusc; [J • Traffic & Marine Transportation; and • Bird, Rodent and Insect Control Where appropriate, the TElA has rccommended mitigation measures which should be incorporated into the design of each transfer facility sitc in order that no unacceptable impacts occur at identified nearest sensitive receivers. 'Il~ Recommendations are provided for monitoring and audit requirements for the construction and operational stages of development. U Provided that approrriate mitigation measures arc incorporatcd into the design of the transfer facilities, it is concludcd that no unacceptable residual (net) environmental impacts will occur. Furthermore, it is envisaged that the development of the sites will result in an overall environmcntal improvcmcnt ill waste transfer arrangements within the Outlying Islands. i I LJ [J (i) r I r l [ l l . l [ ( [ [ [ [ r [ [ [ f u n 1. INTRODUCTION 1.1 This Initial Environmental Impact Assessment (IElA) has been prepared as part of the Outlying Islands Transfer Facilities Consultancy Agreement No. CE 35/91. Details of the Brief for the IEIA are summarised in Paragraph 1.9 below. The IEIA's primary o objective has been to identify the key environmental issues arising out of the development of refuse transfer facilities at seven sites on the Outlying Islands. The !EIA has been based on the outline design of the facilities, as described in Working Paper (WP) No. 8 "Outline Design" (Ref 1.1). It must be recognised however tllat tenderers are o eligible to submit alternative design proposals, in which case further environmental assessment will be needed in the tender stage. Cl 1.2 The !EIA provides an initial assessment and evaluation of the key environmental issues which have been identified, sufficient to set out terms of reference for a detailed Environmental Impact Assessment (EIA) to be conducted by the successful tenderer. Where appropriate, the !EIA has outlined the appropriate mitigation measures which o should be incorporated into the design of each transfer facility site in order that no unacceptable impacts will occur at identified sensitive receivers.