Civil Engineering Department

The Government of the Hong Kong

Special Administrative Region

Agreement No. CE 15/99

Environmental Impact Assessment for

Demolition of Kwai Chung

Incineration Plant and

Kennedy Town CDA

Kwai Chung Incineration Plant

Final Environmental Impact Assessment (Final Report)

SeptemberJuneMay 2001

Atkins China Ltd

Client : Civil Engineering Department				Contract No. (if any) : - CE 15/99
Project Title : Environmental Impact Assessment for Demolition of Kwai Chung Incineration Plant and Kennedy Town CDA				Project No. : 2996
Document No. : 2996-OR026-0543				Controlled Copy No. :
Document Title : Final Environmental Impact Assessment (Final Report) Kwai Chung Incineration Plant
Covering Letter / Transmittal Ref. No. : 2996/15.309/ELT /DG/jw/OG				Date of Issue : SeptemberMay 2314, 2001June 2001
Revision, Review and Approval/Authorisation Records
		/	/		/
		/	/		/
05	6^th Issue	Various/	JWS/		DG/
04	5^th Issue	Various/	JWS/		DG/
03	4^th Issue	Various/	JWS/ WD/		DG/
02	3^rd Issue	Various/	WD/		DG/
01	2^nd Issue	Various/	WD/		DG/
00	1^st Issue	Various/	JWS/		WD/
Revision	Description	Prepared by / date	Reviewed by / date		App. Or Auth. By / date

Distribution (if insufficient space, please use separate paper)

Controlled Copy No.	Issued to
1-410	EPD
1 411- 456040	Civil Engineering Department
46 1- 476241-42	ACL – ELAN
48 - 65	ACE

Note : App. and Auth. mean “Approved” and “Authorised” respectively.

Table of Contents

Executive Summary

1 Introduction 1-1

1.1 Background to the Study. 1-1

1.2 Purpose and Objectives of the Assignment 1-2

1.3 Structure of the Report 1-3

2 Study Area, Sensitive Receivers, Constraints And General Approach To Demolition 2-1

2.1 Study Area Kwai Chung Incineration Plant 2-1

2.2 Sensitive Receivers and Constraints to Demolition. 2-1

2.3 Options for Demolition. 2-2

2.4 General Approach to Demolition of Buildings and Structures at KCIP. 2-4

2.5 Principles of Chimney Demolition at KCIP. 2-5

3 Asbestos Control 3-1

3.1 Site Location and Description. 3-1

3.2 Asbestos Investigation Methodology. 3-1

3.3 ACM to be Removed. 3-2

3.4 Justification of Methods. 3-8

3.5 General Safety Measures. 3-10

3.6 Programme for Asbestos Removal 3-10

3.7 Regulations, Codes of Practice and Local Requirements. 3-11

4 Land Contamination 4-1

4.1 Requirements for Land Contamination Assessment 4-1

4.2 Land Use History. 4-1

4.3 Site Inspection. 4-2

4.4 Methodology. 4-2

4.5 Sampling Locations and Analysis of Results. 4-4

4.6 Contamination Assessment 4-11

4.7 Remediation Action Plan. 4-14

5 LandFill Gas Hazard Assessment 5-1

5.1 Requirement for Landfill Gas Hazard Assessment 5-1

5.2 Scope of Assessment 5-1

5.3 Potential Landfill Hazards. 5-1

5.4 Landfill Gas Risk Assessment Methodology. 5-2

5.5 Description and History of Gin Drinkers Bay Landfill 5-5

5.6 Description of Target Activities. 5-7

5.7 Ground Between Landfill and KCIP. 5-8

5.8 Landfill Gas Risk Assessment 5-9

5.9 Proposed Protection and Precautionary Measures. 5-11

5.10 Conclusion. 5-12

6 Noise 6-1

6.1 Introduction. 6-1

6.2 Government Legislation and Standards. 6-1

6.3 Baseline Conditions. 6-2

6.4 Noise Sensitive Receivers. 6-2

6.5 Potential Sources of Impact 6-2

6.6 Assessment Methodology. 6-3

6.7 Evaluation of Impacts. 6-5

6.8 Conclusions. 6-5

7 Air Quality 7-1

7.1 Introduction. 7-1

7.2 Government Legislation and Standards. 7-2

7.3 Dust Suppression Measures. 7-2

7.4 Vehicle Emissions. 7-3

7.5 Odour. 7-3

7.6 Conclusions. 7-3

8 Water Quality 8-1

8.1 Introduction. 8-1

8.2 Government Legislation and Standards. 8-1

8.3 Baseline Condition. 8-3

8.4 Potential Sources of Impacts. 8-5

8.5 Evaluation of Impacts. 8-5

8.6 Mitigation Measures. 8-7

8.7 Conclusions. 8-10

9 Waste Management 9-1

9.1 Introduction. 9-1

9.2 Assessment Criteria and Methodology. 9-1

9.3 Waste Disposal Ordinance. 9-1

9.4 Waste Disposal (Chemical Waste) (General) Regulation. 9-2

9.5 Dumping at Sea Ordinance. 9-2

9.6 Land (Miscellaneous Provisions) Ordinance. 9-2

9.7 Public Cleansing and Prevention of Nuisance Regulation. 9-2

9.8 Additional Guidelines. 9-3

9.9 Impacts of Wastes Generated from Demolition. 9-3

9.10 Mitigation Measures. 9-7

9.11 Waste Management Planning. 9-11

10 Environmental Monitoring and Audit 10-1

10.1 Introduction. 10-1

10.2 Requirement for EM&A. 10-1

10.3 Environmental Monitoring and Audit 10-1

10.4 Event Contingency Plans. 10-2

10.5 Implementation Schedule. 10-2

10.6 Reporting. 10-2

11 Conclusions and Recommendations 11-1

11.1 Overview.. 11-1

11.2 Demolition Methodology. 11-1

11.3 Asbestos. 11-1

11.4 Land Contamination and Remediation. 11-1

11.5 Landfill Gas Hazard Assessment 11-2

11.6 Noise. 11-2

11.7 Air Quality. 11-2

11.8 Water Quality. 11-2

11.9 Waste Management. 11-3

11.10 Environmental Monitoring and Audit. 11-3

11.11 Summary of Environmental Outcome. 11-3

List of Appendices

Appendix A Preferred Demolition Methodology (Extracted From WP1 Originally Presented November 1999)

Appendix B Selected Gin Drinkers Bay Landfill Gas Monitoring Data

Appendix C Water Quality Standards

Appendix D Site Safety Precautions

Appendix E Criteria for Soil Contamination and Landfill Disposal of Contaminated Soil

Appendix F Environmental Outcome Profile

List of Tables

Table 2.1 Structures to be demolished at KCIP

Table 3.1 Main Locations of Potential ACM Investigated at KCIP

Table 3.2 Areas of ACM Identified by Functional Zone

Table 3.3 Estimated of Amount of ACM Weather Cladding

Table 4.1 Summary of Analytical Results - Soil Samples

Table 4.2 Summary of Analytical Results - Groundwater Samples

Table 4.3 Actions Required Post Demolition

Table 5.1 Qualitative Risk Assessment Matrix

Table 5.2 Qualitative Risk Assessment

Table 5.3 Landfill Gas Detection Action Plan For Works Below Ground Level

Table 6.1 Noise Standards for Daytime Construction Work

Table 6.2 Representative Noise Sensitive Receivers

Table 6.3 Anticipated Demolition/Construction Plant

Table 6.4 Anticipated Construction Plant for Soil Remediation

Table 6.5 Predicted Unmitigated Noise Levels – Demolition Plant

Table 7.1 Representative Air Sensitive Receivers

Table 7.2 Hong Kong Air Quality Objectives (mg/m³) ^(a)

Table 8.1 Water Quality Objectives (WQOs) for Victoria Harbour

Table 8.2 Summary Statistics of 1998 Water Quality of Rambler Channel (VM13/14)

Table 8.3 Summary Statistics of 1999 Water Quality of Rambler Channel (VM12/14)

Table 8.4 Comparison of Water Quality Stabndards and Groundwater Analysis

Table 9.1 Summary of Waste Management Impacts

Table 10.1 Schedule of Impacts and Mitigation Measures

List of Figures

Figure 1.1 KCIP Locality Plan

Figure 2.1 KCIP Sensitive Receivers & Constraints

Figure 2.2 Outline Zoning Plan Kwai Chung

Figure 2.3 Typical Site Hoarding

Figure 2.4 Internal Working Platforms KCIP Chimney

Figure 3.1 Cladding on the Main Incinerator Building

Figure 3.2 Plan view of Chimney Stack

Figure 3.3 Location of ACM in Chimney Flue Guides

Figure 3.4 Elevation View of Chimney Stack-Top Section

Figure 4.1 KCIP Borehole Locations and Contaminationed Locations for Remedial Actio

Figure 4.2 KCIP Borehole Locations and Contaminated Locations for Remedial Actionn

List of Abbreviations

AAP	Asbestos Abatement Plan
ACE	Advisory Council on Environment
ACM	Asbestos Containing Material
AIR	Asbestos Investigation Report
AP	Authorised Person
APCO	Air Pollution Control Ordinance
AQO	Air Quality Objective
ASR	Air Sensitive Receivers
ASTM	American Society for Testing Materials
BTEX	Benzene, Toluene, Ethylbenzene and Xylene
BOO	Building Ordinance Office
CAP	Contamination Assessment Plan
CAR	Contamination Assessment Report
CED	Civil Engineering Department
CP	Car Park
CPLD	Committee on Planning & Land Development
CZ	Consultation Zone
CSL	Registered Asbestos Consultant
DEP	Director of Environmental Protection
DSD	Drainage Services Department
EIA	Environmental Impact Assessment
EIAO	Environmental Impact Assessment Ordinance
EM&A	Environmental Monitoring & Audit
EMSD	Electrical & Mechanical Services Department
EPD	Environmental Protection Department
FIUO	Factories and Industrial Undertakings Ordinance
G I/C	Government, Institutional/Community
GDBL	Gin Drinker’s Bay Landfill
HOKLAS	Hong Kong Laboratory Accreditation Scheme
IAR	Initial Assessment Report
KCIP	Kwai Chung Incineration Plant
KCPTW	Kwai Chung Peliminary Treatment Works
LDC	Land Development Corporation
LGHAGN	Landfill Gas Hazard Assessment Guidance Note
MTIA	Marine Traffic Impact Assessment
NEDA	Non explosive demolition agent
NCO	Noise Control Ordinance
NSR	Noise Sensitive Receiver
PCDD / PCDF	Dioxins and Furans
PCWA	Public Cargo Working Area
PFBP	Public FillPublic Filling Barging Point
PAC / PAH	Poly Aromatic Hydrocarbons
PME	Powered Mechanical Equipment
PQA	Preliminary Quantitative Assessment
RAC	Registered Asbestos Consultant
RAP	Remediation Action Plan
RCP	Refuse Collection Point
RSE	Resident Site Engineer
SB	Study Brief