Table of Contents

8. LANDFILL GAS HAZARD ASSESSMENT.. 8-1

8.1 Introduction. 8-1

8.2 Environmental Legislation, Standards and Guidelines. 8-1

8.3 Evaluation of Environmental Impacts. 8-1

8.4 Conclusion. 8-1

LIST OF FIGURES

Figure 8.1A Gin Drinkers Bay Landfill Consultation Zone and Project Construction Boundary

Figure 8.1B Gin Drinkers Bay Landfill Consultation Zone and Project Construction Boundary (zoom in)

APPENDICES

Appendix 8-1 Consultation Zone of Gin Drinkers Bay Landfill

8. LANDFILL GAS HAZARD ASSESSMENT

8.1 Introduction

8.1.1 This section presents a landfill gas hazard assessment for the construction and operation of the Project.

8.2 Environmental Legislation, Standards and Guidelines

8.2.1 Under Annexes 7 and 19 of the Technical Memorandum of the Environmental Impact Assessment Ordinance, Landfill Gas (LFG) hazard assessment is required for any development or re-development within the Consultation Zone, i.e. the area surrounding the landfill boundary as defined by a line running parallel to and 250m away from the edge of the waste.

8.2.2 EPD has issued the Landfill Gas Hazard Assessment Guidance Note (EPD/TR8/97), which provides a risk assessment framework for developments proposed close to landfill sites. Generally, a qualitative landfill risk assessment is required to ensure that appropriate levels of safety design features are incorporated within the development.

8.3 Evaluation of Environmental Impacts

8.3.1 Restored Gin Drinkers Bay Landfill is located at the North-west from the Project boundary. The Consultation Zone boundary was published by EPD in Annex A of Landfill Gas Hazard Assessment Guidance Note, which is provided in Appendix 8.1.

8.3.2 According to the Study Brief, if any part of a project option shall fall within 250m of Consultation Zone of the restored Gin Drinkers Bay Landfill, the potential landfill gas hazard shall be evaluated and assessed.

8.3.3 As shown in Figure 8.1, the proposed project does not fall within the 250m Consultation Zone of the restored Gin Drinkers Bay Landfill. Therefore, the LFG hazard assessment is considered not necessary unless there is any possible change(s) on the alignment option in the future that the project/construction boundary shows encroachment on the Consultation Zone.

8.4 Conclusion

8.4.1 The LFG hazard assessment is considered not necessary as the proposed project does not fall within the 250m Consultation Zone of the restored Gin Drinkers Bay Landfill.