TABLE OF CONTENTS

 

1.         INTRODUCTION

Background

Designated Projects under the EIAO

Purpose and Scope of the EIA Study

EIA Assessment Area

Relevant Approved EIA Reports

Structure of this EIA Report

2.         Project Description

Purpose and Objective of the Project

Brief Description of the Project

Project Scope

Need for the Project

Consideration of Alternatives/Options

Construction Programme

Concurrent Projects

Continuous Public Involvement

3.         Water Quality Impact

Introduction

Water Sensitive Receivers

Environmental Legislation, Policies, Plans, Standards and Criteria

Description of the Environment and Baseline Conditions

Identification of Potential Impacts

Assessment Methodology

Prediction and Evaluation of Environmental Impacts

Mitigation of Environmental Impacts

Land-based Construction

Evaluation of Residual Impacts

Environmental Monitoring and Audit

Conclusion

4.         NOISE 

Introduction

Environmental Legislation, Standards and Guidelines

Description of the Existing Environment

Assessment Methodology

Identification of Environmental Impacts

Prediction and Evaluation of Environmental Impacts

Mitigation of Adverse Environmental Impacts

Evaluation of Residual Impacts

Environmental Monitoring and Audit

Conclusion

5.         Construction Dust IMPACT

Introduction

Environmental Legislation, Standards and Guidelines

Description of the Environment

Air Sensitive Receivers

Potential Sources of Impact

Assessment Methodology

Prediction and Evaluation of Impacts

Evaluation of Residual Impacts

Environmental Monitoring and Audit Requirements

Conclusion

6.         WASTE MANAGEMENT

Introduction

Environmental Legislation

Environmental Guidelines

Assessment Approach and Methodology

Identification of Waste Sources

Predicted and Evaluation of Waste Impacts for Construction Phase

Mitigation Measures for Construction Phase

Impacts Caused by Handling, Collection and Disposal of Waste

Evaluation of Residual Impacts

Environmental Monitoring and Audit Requirements

Conclusion

7.         ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS

Introduction

Water Quality Impact

Noise Impact

Air Quality Impact

Waste Management

8.         IMPLEMENTATION SCHEDULE AND RECOMMENDED MITIGATION MEASURES

9.         Environmental Outcomes and Impact summary

Introduction

Environmental Outcomes

Impact Summary

 

 

 

LIST OF TABLES

 

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

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