November 2010

Consultancy Agreement No. NEX/2213

MTR Corporation Limited

EIA Study for Shatin to Central Link Protection Works at Causeway Bay Typhoon Shelter

Environmental Impact Assessment Report(Final)

AECOM Asia Company Ltd i Nov 2010

TOC-Text

Background .................................................................................................................................. 1-1 Designated Projects under the EIAO ............................................................................................. 1-2 Purpose and Scope of the EIA Study ............................................................................................ 1-2 EIA Assessment Area ................................................................................................................... 1-3 Relevant Approved EIA Reports .................................................................................................... 1-3 Structure of this EIA Report ........................................................................................................... 1-4

Purpose and Objective of the Project ............................................................................................ 2-1 Brief Description of the Project ...................................................................................................... 2-1 Project Scope ............................................................................................................................... 2-2 Need for the Project ...................................................................................................................... 2-2 Consideration of Alternatives/Options ........................................................................................... 2-3 Construction Programme ............................................................................................................ 2-20 Concurrent Projects .................................................................................................................... 2-20 Continuous Public Involvement ................................................................................................... 2-21

Introduction .................................................................................................................................. 3-1 Water Sensitive Receivers ............................................................................................................ 3-1 Environmental Legislation, Policies, Plans, Standards and Criteria ................................................ 3-2 Description of the Environment and Baseline Conditions ............................................................... 3-5 Identification of Potential Impacts .................................................................................................. 3-7 Assessment Methodology ............................................................................................................. 3-9 Prediction and Evaluation of Environmental Impacts ................................................................... 3-26 Mitigation of Environmental Impacts ............................................................................................ 3-35 Land-based Construction ............................................................................................................ 3-37 Evaluation of Residual Impacts ................................................................................................... 3-39 Environmental Monitoring and Audit ............................................................................................ 3-40 Conclusion ................................................................................................................................. 3-40

Introduction .................................................................................................................................. 4-1 Environmental Legislation, Standards and Guidelines ................................................................... 4-1 Description of the Existing Environment ........................................................................................ 4-3 Assessment Methodology ............................................................................................................. 4-3 Identification of Environmental Impacts ......................................................................................... 4-4 Prediction and Evaluation of Environmental Impacts ..................................................................... 4-5 Mitigation of Adverse Environmental Impacts ................................................................................ 4-6 Evaluation of Residual Impacts ..................................................................................................... 4-8 Environmental Monitoring and Audit .............................................................................................. 4-9 Conclusion ................................................................................................................................... 4-9

Introduction .................................................................................................................................. 5-1 Environmental Legislation, Standards and Guidelines ................................................................... 5-1 Description of the Environment ..................................................................................................... 5-1 Air Sensitive Receivers ................................................................................................................. 5-3 Potential Sources of Impact .......................................................................................................... 5-3 Assessment Methodology ............................................................................................................. 5-4 Prediction and Evaluation of Impacts ............................................................................................ 5-7 Evaluation of Residual Impacts ................................................................................................... 5-10

Consultancy Agreement No. NEX/2213

MTR Corporation Limited

EIA Study for Shatin to Central Link Protection Works at Causeway Bay Typhoon Shelter

Environmental Impact Assessment Report(Final)

AECOM Asia Company Ltd ii Nov 2010

TOC-Text

Environmental Monitoring and Audit Requirements ..................................................................... 5-10 Conclusion ................................................................................................................................. 5-10

Introduction .................................................................................................................................. 6-1 Environmental Legislation ............................................................................................................. 6-1 Environmental Guidelines ............................................................................................................. 6-2 Assessment Approach and Methodology ...................................................................................... 6-4 Identification of Waste Sources ..................................................................................................... 6-4 Predicted and Evaluation of Waste Impacts for Construction Phase .............................................. 6-5 Mitigation Measures for Construction Phase ................................................................................ 6-11 Impacts Caused by Handling, Collection and Disposal of Waste.................................................. 6-19 Evaluation of Residual Impacts ................................................................................................... 6-19 Environmental Monitoring and Audit Requirements ..................................................................... 6-19 Conclusion ................................................................................................................................. 6-19

Introduction .................................................................................................................................. 7-1 Water Quality Impact .................................................................................................................... 7-1 Noise Impact ................................................................................................................................ 7-1 Air Quality Impact ......................................................................................................................... 7-2 Waste Management ...................................................................................................................... 7-2

Introduction .................................................................................................................................. 9-1 Environmental Outcomes .............................................................................................................. 9-1 Impact Summary .......................................................................................................................... 9-4

Table 2.1 Comparison of Alignment Design Options for Cross Harbour Tunnel Table 2.2 Benefits and Dis-benefits of Construction Methods Table 2.3 Benefits and Dis-benefits of Construction Sequences Table 2.4 Summary of Concurrent Projects Table 2.5 Summary of Public Consultation Activities Table 2.6 Summary of Key Public Views on the Project Table 3.1 Summary of Water Quality Objectives for Victoria Harbour WCZ Table 3.2 WSD’s Water Quality Criteria for Flushing Water at Sea Water Intakes Table 3.3 Proposed Assessment Criteria for Dissolved Metals and Micro-Pollutants with Reference to

Standards Adopted by Other Countries Table 3.4 Baseline Marine Water Quality Condition for Central Victoria Harbour Table 3.5 Baseline Marine Water Quality Condition for Causeway Bay Typhoon Shelter Table 3.6 Tentative Programme and Recommended Maximum Dredging Rates for WDII and CWB Table 3.7 Maximum Dredging Rates Table 3.8 Summary of Planned Coastal Developments Outside the Assessment Area Table 3.9 Summary of Parameters for Sediment Plume Model (Delft3D-PART) Table 3.10 Predicted Suspended Solids Concentrations at Seawater Intakes Table 3.11 Predicted Suspended Solids Elevations and Sedimentation Rates at Corals Table 3.12 Comparison of Marine Site Investigation Sediment Elutriate Test Results with the Water Quality

Standards Table 3.13 Calculation of the Effects of Increased Suspended Sediment Concentrations on Dissolved

Oxygen Concentrations under the Assessment Scenario Table 3.14 Maximum Effects on Dissolved Oxygen inside near the Dredging Site in CBTS Table 4.1 Air-borne Daytime Construction Noise Criteria

Consultancy Agreement No. NEX/2213

MTR Corporation Limited

EIA Study for Shatin to Central Link Protection Works at Causeway Bay Typhoon Shelter

Environmental Impact Assessment Report(Final)

AECOM Asia Company Ltd iii Nov 2010

TOC-Text

Table 4.2 Construction Noise Criteria for Activity other than Percussive Piling during Restricted Hours Table 4.3 Construction Noise Criteria for SPME Table 4.4 Representative Noise Sensitive Receivers for Noise Impact Assessment Table 4.5 Construction Phase Elements Table 4.6 Unmitigated Construction Noise Levels due to construction of the Project Table 4.7 Quiet PME Recommended for Adoption during Construction Phase Table 4.8 Noise Mitigation Measures for Certain PME during Construction Phase Table 4.9 Mitigated Construction Noise Levels due to Construction of the Project Table 4.10 Cumulative Construction Noise Levels from Other Concurrent Projects (Mitigated) Table 5.1 Hong Kong Air Quality Objectives Table 5.2 Representative Air Sensitive Receivers Table 5.3 Emission Factors for Dusty Construction Activities (For Hourly and Daily TSP Concentrations

Prediction) Table 5.4 Averaged Emission Factors for Dusty Construction Activities (For Annual Concentrations

Prediction) Table 5.5 Different Major Dust Generating Activities in the Worst Scenarios during Construction Phase of

WDII & CWB Table 5.6 Predicted Cumulative Maximum Hourly, 24-hour and Annual Average TSP Concentrations at

Representative Air Sensitive Receivers (Unmitigated) Table 5.7 Predicted Cumulative Maximum Hourly, 24-hour and Annual Average TSP Concentrations at

Representative Air Sensitive Receivers (Mitigated) Table 6.1 Identification of Waste Types and Sources in Construction Phase of the Project Table 6.2 Summary of Inert Construction and Demolition Materials Quantities Generated Table 6.3 Summary of Chemical Screening Results Table 6.4 Summary of Biological Screening Results Table 6.5 Disposal Quantity for Marine Sediment Table 6.6 Summary of Waste Generation and Recommended Disposal Methods for Construction and

Demolition Works Table 8.1 Implementation Schedule of Recommended Mitigation Measures Table 9.1 Summary of Key Environmental Outcomes / Benefits Table 9.2 Summary of Environmental Impacts associated with the Project