1. INTRODUCTION

1.1 Purpose of the Manual

1.1.1 The purpose of this Environmental Monitoring & Audit (EM&A) Manual is to guide the EM&A programme for the Demolition of Buildings and Structures within the Proposed Kennedy Town Comprehensive Development Area (KTCDA study brief ESB-023/98) and to ensure compliance with the Environmental Impact Assessment (EIA) Report. This is subject to approval of the EIA Report under the statutory procedures of the EIAO and supporting Technical Memorandum. The EIA recommends procedures to:

· Ensure that any environmental impacts resulting from the demolition of the KTCDA are minimised or kept to acceptable levels.

· Check that mitigation measures have been applied and are effective, and that the appropriate corrective actions are undertaken, if and when required.

· Provide a means of checking compliance with environmental objectives, recording anomalies and documenting corrective action.

1.1.2 This Manual contains the following:

· Information on the KTCDA demolition project, the project organisation and construction programme;

· General EM&A principles and the EM&A team organisation;

· Monitoring parameters, schedules, Action/Limit Levels and action plans;

· Complaints procedures.

· Reporting procedures.

1.1.3 As a general note the IC(E) may be part of the Engineer’s Team, or may be totally independent, employed under a separate contract by the project proponent. In the latter case, this Manual makes reference to items requiring agreement between the Contractor (or his monitoring team), the engineers representative, relevant Government departments and the IC(E). Attention is drawn to the possibility of requiring agreement from a third party outside the contract in the event that the IC(E) is employed independently.

1.2 Requirements for EM&A Programme

1.2.1 The Criteria for undertaking EM&A are provided by EPD, these are summarised as follows:

(a) to protect sensitive receivers from environmental impacts if mitigation is not implemented;

(b) to protect the ecosystem;

(d) to monitor the effectiveness of mitigation measures which involves a long period to establish;

(e) to monitor any unproven technology;

(f) to validate the hypothesis in analysis and design;

(g) to audit the changing project scheduling; and

(h) others.

1.2.2 The conclusions from the EIA indicate that Criterion a) is relevant with respect to the possible impact excessive dust and noise may have on the sensitive receivers in close proximity to the KTCDA.

1.2.3 Without mitigation for dust and noise during the demolition phase, activities could cause nuisance to the residents or occupants of the residential and some GI/C facilities in the immediate vicinity. The other criteria are not relevant to this project. On the basis of this interpretation of Criterion a) an EM&A programme is recommended.

1.3 Project Description

1.3.1 The endorsed preferred method of demolition shall adopt a top-down, non-blasting approach for the demolition of KTCDA. At this stage the KTCDA includes:

· Kennedy Town Incineration Plant (KTIP);

· Kennedy Town Abattoir (KTA);

· New World First Bus Depot (NWFB);

· Car / lorry park (CP);

· FEHD Refuse Collection Point (RCP); and

· Cadogan Street Temporary Garden (CSTG).

1.3.2 The structures to be demolished are summarised in Table 1.1.

1.3.3 The KTCDA was recommended for future private housing development in the “Planning and Engineering Study for the Redevelopment of Mount Davis Cottage Area and Kennedy Town Police Married Quarters” (Agreement No. CE 52/97), completed in May1999. Under that study the Open Space and Refuse Collection Point were proposed for relocation within the redevelopment.

1.3.4 The proposed Kennedy Town Development and Route 7 (R7), a strategic road link between Kennedy Town and Aberdeen, are located just to the north of the KTCDA site although the exact alignment of R7 is not yet confirmed. A further planning and engineering study to address some major issues, including the Kennedy Town Development and alternative road alignments of Route 7, is currently being considered by the government. The findings from this further study may alter the future land use of the KTCDA recommended in May 1999.

Table 1.1 Structures to be demolished at KTCDA

Building	Brief Description
KTIP Chimneys	Two reinforced concrete chimneys, 60m high, 3.5m in diameter.
KTIP Building	Reinforced concrete structure of approximately 3,025m² on plan Refuse Pier
Kennedy Town Abattoir	5-storey reinforced concrete structures of approximately 9,500m² on plan, including, Reception Pier
E & M Services Department Building	Boiler House and Carcass Incinerator Building. One reinforced concrete chimney, 25m high, 3m in diameter.
New World First Bus Depot	Offices and Vehicle Inspection Bays. Overall size is approximately 600m² on plan. Diesel storage tank and lubrication oil store.
Hong Kong Electric Sub Station	Single Storey Transformer House (adjacent to lairage)
Cadogan Street Temporary Garden	Open landscaped area with street lighting and sitting areas
Sai See Street Refuse Collection Point	Prefabricated steel and concrete structure, single storey.

1.3.5 It has been assumed that the demolition for KTCDA will take place as soon as possible in order to allow future developments on and near the site. The start date is tentatively scheduled for 2003 with demolition works lasting about one year. Soil remediation may take another six to eight months.

1.4 Sensitive Receivers and Constraints to Demolition

1.4.1 This section identifies the sensitive receivers (SRs) affected by the Project as defined in the EIAO and summarises the main implications of the SRs and infrastructure on demolition methods. Sensitive receivers and other constraints are shown in Figure 1.1.

Sensitive Receivers at KTCDA

Residential, Government, Institutional and Community

1.4.2 Residential, Government, Institutional and Community uses surround the KTCDA site and many are elevated and overlook the site. The nearest rank of sensitive receivers is discussed below.

· Kennedy Town Police Married Quarters currently overlooks the site. The premises are scheduled to be vacated but parts of the buildings will potentially be occupied up to March 2002.

· The Mount Davis Cottage Area has already been vacated.

· The new Housing Society development (Cayman Rise) at Ka Wai Man Road is scheduled for occupation by the 3^rd quarter of 2001.

· There are occupied residential buildings at Cadogan Street including Centenary Mansion.

1.4.3 Other premises in the low rise blocks in Cadogan Street (north of Victoria Road) haven been demolished.

1.4.4 Manhattan Heights high rise development at Kennedy Town New Praya and some of the residential units will overlook the site by the time demolition of KTCDA takes place.

1.4.5 There are other residential blocks further west along Victoria Road (e.g. Huncliffe Court) that would be shielded by the intervening structures such as the China Merchants Wharf Godown and other industrial buildings on Victoria Road.

1.4.6 There are Government, Institutional and Community uses at St Lukes Church School, St Lukes Settlement, Jockey Club Clinic, Victoria Mortuary and the Bayanihan Centre. St Lukes Church School on Ka Wai Man Road and both St Lukes Settlement and Jockey Club Clinic will remain in operation at the time of demolition for KTCDA. The Bayanihan Centre on Victoria Road is a training and support facility for Philippine overseas workers that is open seven days per week and it is assumed this will remain in operation at the time of the demolition of KTCDA.

NWFB and RCP

1.4.7 The New World First Bus Depot and the Refuse Collection Point may require relocation prior to the demolition. However this is not material to the EIA as neither are defined as SRs. Road Traffic

Other Issues

1.4.8 The revised alignment for Route 7 and the extent of the Kennedy Town Development are currently under review but at present the programme of these developments is unlikely to be advanced before year 2002 and after the target completion date for demolition of KTCDA. At this stage these proposals are not thought to have any impact on the Project.

1.4.9 Based on initial site investigations and according to the building drawings for the Sites records, some asbestos containing materials (ACM) are present at KTCDA. The asbestos investigation and abatement plans are described in detail in the dedicated Asbestos Study Report. Asbestos abatement will take place in line with the requirements of the APCO and codes of practice.

1.5 General Approach to Demolition of Buildings and Structures at KTCDA

General Approach

1.5.1 This section presents general procedures for demolition, which would be likely to apply to KTCDA to illustrate the agreed methodology which has been used to progress the Environmental Impact Assessment.

1.5.2 Whereas the eventual detailed demolition plan of the selected demolition Contractor(s) may not necessarily adopt the precise methodology proposed in WP1 and summarised here, the consultants believe that general characteristics of the methods are appropriate. Blasting will not be used and other conventional methods are sufficiently effective and applicable for the tasks. Where possible methods that will help reduce noise and dust nuisances have been chosen. The options selected are also broadly in line with the Draft Code of Practice for Demolition of Buildings (Buildings Department 1998) which will also need to be observed at the detailed design stage.

1.5.3 The overriding concerns for the demolition Project will be safety and minimisation of environmental impacts. This will include the safety of the operatives, safety of the other workers on the site and safety of the general public as well as protection of adjacent facilities and minimisation of nuisances. The Contractor shall also, during the course of demolition, ensure and verify that all utilities and services have been rendered safe.

Hoarding and Site Access

1.5.4 The typical site hoarding will be modified in to a perimeter noise barrier as shown in Figure 1.2. Portable barricades will be used to cordon off different work zones within the site. All structures are totally within the proposed Project sites and access would be controlled by security guards. No members of the public or unauthorised person would be allowed entry to the site. Only Contractors’ personnel and Government officials would be allowed within the Contractor’s working area.

General Demolition Principles

1.5.5 Demolition of building and structures would generally be in the reverse order to that of construction, progressive, storey by storey, having regard to type of construction. Wherever possible, external non-loading bearing cladding should be removed first. All asbestos containing materials (ACM, particularly any ACM panels, would be removed prior to commencement of demolition works where ever possible. Other ACM may need to be removed as access is gained to particular areas and as the demolition progresses.

General Safety Measures

1.5.6 The Contractor will need to carry out works in accordance with the Factories and Industrial Undertakings Ordinance, particularly the Construction Site (Safety) Regulations and the Code of Practice for Scaffold Safety, as well as all other statutory requirements and guidelines covering health and safety issues.

1.5.7 The Contractor shall arrange for a competent scaffolder to visit site and inspect the scaffolding work, and to make any adjustments as the work proceeds, to ensure its stability.

1.5.8 The Contractor should ensure that every work place, approach and opening, which may pose a danger to persons employed and others should be properly illuminated and protected.

1.5.9 The use of all mobile cranes must be strictly controlled to ensure that cranes of adequate capacity will be used for lifting under different loading conditions.

1.6 Principles of Chimney Demolition at KTCDA

General Approach

1.6.1 The area beneath the chimneys would be cordoned off and only authorised staff involved in the demolition of the chimneys would be allowed admission into the vicinity of the chimney structures.

1.6.2 The concrete weather shield and the flues will be removed manually. The principle of the demolition procedure shall be that the chimney and flues would be cut into pieces and these pieces lowered to ground level inside the chimney. This method would ensure that full control the fall of the debris and that the pieces of reinforced concrete are not left to free fall outside the chimney.

1.6.3 The principle of the demolition procedure for the upper portion of the chimneys (i.e. say 10metres from ground level or greater) is that the chimneys will be broken into small pieces on the spot by operatives using hand held tools. They would work from working platforms external to the chimney. Hydraulic breakers would be used for the remaining lower portions of the chimneys.

1.7 Remedial Action Plan for Contaminated Soils

1.7.1 The areas requiring decontamination, identified based on the Contamination Assessment Report and Remediation Action Plan are shown in Figure 6.1.

1.8 Environmental Study Requirements

1.8.1 The EIA recommended a range of mitigation measures to control the demolition Project’s potential construction environmental impacts, which include dust and noise impacts. The schedule of mitigation measures is provided in Section 7 of this Manual.

1.9 Project Organisation

1.9.1 The proposed project organisation is presented in Figure 1.3 as the basis of information available at the time of report preparation.

1.9.2 The preferred approach is for the Independent Environmental Monitoring Team (ET) to be employed directly by the project proponent (CED). The monitoring is audited and checked by the Environmental Monitoring Team Leader (ETL) who reports to the Engineer’s Representative (ER).

1.9.3 Independent Monitoring Team Leader (ETL): This person should be professionally qualified with suitable experience in environmental management and planning. As a general recommendation, 7 years’ experience is desirable, although if the proposed ETL has less, agreement should be sought from the ER. Extensive knowledge of the study area is required. The ETL should have work experience in Hong Kong managing and providing specialist advice on environmental monitoring of infrastructure projects.

1.9.4 Site Inspection Team Leader: Requires experience working on environmental projects in Hong Kong. Extensive experience in dealing directly with Contractors is required.

1.9.5 Noise/Air Specialist: Requires experience in the air and noise pollution field. Skills in the use of computer models, database design and management of monitoring programmes are required.

1.9.6 Consultant: Experience as an environmental consultant with a broad range of expertise both in the technical and managerial aspects of environmental assessment. Proficient in: water quality sampling, analysis and assessment; air and noise monitoring, modelling and analysis; site assessment; and scoping exercises to identify key environmental issues.

1.9.7 Assistant Consultant: Experience in conducting on-site monitoring, data-gathering and subsequent computer-modelling data analyses.

1.9.8 The duties to be undertaken by the Environmental Team (ET) comprise the following:

· sampling, analysis and statistical evaluation of monitoring parameters with reference to the EIA Study recommendations and requirements.

· environmental site surveillance;

· audit of compliance with environmental protection and pollution prevention and control regulations;

· monitor the implementation of the environmental mitigation;

· monitor compliance with the environmental protection clauses/specifications in the Contract;

· review construction (demolition) programme and comment as necessary;

· review construction (demolition) methodology and comments as necessary;

· complaint investigation , evaluation and identification of corrective measures;

· liaison with IC(E) on environmental performance matters and submission of EM&A deliverables to IC(E) for approval; and

· advise on environmental improvement and enhancement.

1.9.9 Appropriate resources shall be allocated by the ET to fulfil the duties specified in this Manual.

1.9.10 Independent Checker (Environment). The role of the IC(E) shall be independent from the management of construction works; but the IC(E) shall be empowered to audit the environmental performance of construction (Appendix B). The IC(E) shall have a similar of level of experience as the ETL.

1.10 Demolition Programme

1.10.1 The structures to be demolished are summarised in Table 1.1. It has been assumed that the demolition for KTCDA will take place as soon as possible in order to allow future developments on and near the site. The start date is tentatively scheduled for 2003 with demolition works lasting about one year.

1.10.2 The buildings and chimneys at KTCDA can be demolished and removed by conventional top down demolition using hand held tools and mechanical breaking methods. Professional experience and consultation with local contractors indicates that the estimated time for the completion of these works of 12 months would appear to be ample time for demolition based on the above methodology. The chimney demolition would follow demolition of the main buildings. The EM&A programme will also cover the soil remediation phase, which will be undertaken following the demolition of structures which may last another six to eight months.

1.10.3 Whereas the demolition programme has yet to be established in detail, the implementation of acoustic mitigation measures such as use of silenced equipment and acoustic barriers is routine in Hong Kong nowadays. Likewise there will be statutory requirements for mitigation of fugitive dust emissions under the APCO. Whereas these should not have any significant impact on the, programme providing the requirements are recognised early as will be the case through the environmental permit, the Contractors will be expected to allow for such resources in their responses to tender.

Table 1.1 Structures to be demolished at KTCDA

Building	Brief Description
KTIP Chimneys	Two reinforced concrete chimneys, 60m high, 3.5m in diameter.
KTIP Building	Reinforced concrete structure of approximately 3,025m² on plan Refuse Pier
Kennedy Town Abattoir	5-storey reinforced concrete structures of approximately 9,500m² on plan, including, Reception Pier
E & M Services Department Building	Boiler House and Carcass Incinerator Building. One reinforced concrete chimney, 25m high, 3m in diameter.
New World First Bus Depot	Offices and Vehicle Inspection Bays. Overall size is approximately 600m² on plan. Diesel storage tank and lubrication oil store.
Hong Kong Electric Sub Station	Single Storey Transformer House (adjacent to lairage)
Cadogan Street Temporary Garden	Open landscaped area with street lighting and sitting areas
Sai See Street Refuse Collection Point	Prefabricated steel and concrete structure, single storey. *

2. AIR QUALITY

2.2 Total Suspended Particulates

2.2.1 1-hour and 24-hour TSP levels shall be measured to indicate the impacts of construction dust on air quality. The TSP levels shall be measured by following the standard high volume sampling method as set out in Title 40 of the American Code of Federal Regulations, Chapter 1 (Part 50), Appendix B. Upon approval of the ER, 1-hour TSP levels shall alternatively be measured by direct reading methods to indicate short event impacts which are capable of producing comparable results as that obtained by the high volume sampling method.

2.2.2 All relevant data including temperature, pressure, weather conditions, elapsed-time meter reading for the start and stop of the sampler, identification and weight of the filter paper, and other special phenomena and work progress of the concerned site etc. shall be recorded in detail. A sample data sheet is shown in Table 2.4.

2.3 Monitoring Equipment

2.3.1 High volume samplers (HVS) to be used for carrying out the 1-hr and 24-hr TSP monitoring shall comply with the following specifications:

· 0.6-1.7 m³/min (20-60 SCFM) adjustable flow range;

· Equipped with a timing/control device with +/- 5 minutes accuracy for 24 hours operation;

· Installed with elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;

· Capable of providing a minimum exposed area of 406 cm² (63 in²);

· Flow control accuracy: +/- 2.5% deviation over 24-hr sampling period;

· Equipped with a shelter to protect the filter and sampler;

· Incorporated with an electronic mass flow rate controller or other equivalent devices;

· Equipped with a flow recorder for continuous monitoring;

· Provided with a peaked roof inlet;

· Incorporated with a manometer;

· Able to hold and seal the filter paper to the sampler housing at horizontal position;

· Easy to change the filter; and

· Capable of operating continuously for 24-hr period.

2.3.2 The ET shall provide sufficient equipment to ensure that the monitoring commences on schedule and is not interrupted as a result of equipment failure, damage, loss or routine maintenance.

2.3.3 The HVSs shall be equipped with an electronic mass flow controller and be calibrated against a traceable standard at regular intervals. All the equipment, calibration kit, filter papers, etc. shall be clearly labelled.

2.3.4 Initial calibration of dust monitoring equipment shall be conducted upon installation and thereafter at bi-monthly intervals. The transfer standard shall be traceable to the internationally recognised primary standard and be calibrated annually. The calibration data shall be properly documented for future reference. All the data shall be converted into standard temperature and pressure conditions.

2.3.5 The flow-rate of the sampler before and after the sampling exercise with the filter in position shall be verified to be constant and be recorded in the data sheet (Table 2.4).

2.3.6 If the ET uses a direct reading dust meter to measure 1-hr TSP levels, he shall submit sufficient information to the ER including calibration standards to demonstrate that the instrument is suitable for the monitoring task. The instrument shall also be calibrated regularly, and the 1-hr sampling shall be determined periodically by HVS to check the validity and accuracy of the results measured by direct reading method.

2.3.7 The ET shall provide sufficient wind data monitoring equipment to ensure that the monitoring commences on schedule and is not interrupted as a result of equipment failure, damage, loss or routine maintenance.

2.4 Laboratory Measurement/ Analysis

2.4.1 A clean laboratory with constant temperature and humidity control, equipped with necessary measuring and conditioning instruments, to handle the dust samples collected, shall be available for sample analysis, equipment calibration and maintenance.

2.4.2 If a site laboratory is set up or a non-HOKLAS accredited laboratory is hired for carrying out the laboratory analysis, the laboratory equipment shall be approved by the ER and the measurement procedures shall be witnessed by the ER. The ET shall provide the ER with one copy of Title 40 of the American Code of Federal Regulations, Chapter 1 (Part 50), Appendix B for his reference.

2.4.3 Filter paper of size 8”x10” shall be labelled before sampling. It shall be a clean filter paper with no folds or pin holes, and shall be conditioned in a humidity controlled chamber for over 24-hr and be pre-weighed before sampling.

2.4.4 After sampling, the filter paper loaded with dust shall be kept in a clean and tightly sealed plastic bag. The filter paper will then be returned to the laboratory for reconditioning in the humidity control chamber followed by accurate weighing by an electronic balance to the nearest 0.1mg. The balance shall be regularly calibrated against a traceable standard.

2.4.5 All the collected samples shall be retained and kept in a good condition for 6 months before disposal.

2.5 Dust Sensitive Receivers and Monitoring Locations

2.5.1 The dust sensitive receivers are shown in Figure 1.1. These include the following:

Existing Sensitive Receivers:

· Serene Court

· Regent Heights Towers

· Huncliffe Court

· Cheong Kat Mansion

· Centenary Mansion

· Sai Wan Estate

· Bayanihan Centre

· Jockey Club Clinic (JCC)

· St. Luke’s Church and Lui Ming Choi Memorial Primary School

· Sai Wan New Apartments

· Kennedy Mansion and

· Cheong Kat Building

Future Receivers:

· Future URA Development

· Hong Kong Housing Society Residential Development (Cayman Rise)

· Proposed Residential Development, Sai Wing Street

· Manhattan Heights.

2.5.2 The status and locations of dust sensitive receivers may be revised after issue. The ET shall identify the SR locations to be adopted based on the updated construction programme and seek approval from the ER and relevant government departments.

Monitoring Locations

2.5.3 The monitoring locations should meet the following criteria:

· A horizontal platform with appropriate support to secure the samplers against gusty wind shall be provided;

· No two samplers shall be placed less than 2 metres apart;

· The distance between the sampler and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the sampler;

· A minimum of 2 metres of separation from walls, parapets and penthouses is required for rooftop samplers;

· A minimum of 2 metre separation, measured horizontally, from any supporting structure, is required;

· No furnace or incinerator flues shall be nearby;

· Airflow around the sampler shall be unrestricted;

· The sampler shall be more than 20 metres from the dripline;

· Any wire fence and gate, to protect the sampler, shall not cause any obstruction during monitoring;

· Permission must be obtained to set up the samplers and to obtain access to the monitoring stations; and

· A secured supply of electricity will be needed to operate the samplers.

2.5.4 In general, monitoring should be undertaken at sensitive receivers. However, as it cannot be guaranteed that permission to monitor at privately owned locations will be forthcoming (and hence to avoid delays in organising the monitoring programme and contractual difficulties), monitoring may be undertaken at alternative locations such as the site boundary, where necessary. Suggested locations are shown on Figure 2.1.

2.5.5 The criteria for locating samplers shall be as follows, as far as practicable:

· take into consideration the prevailing meteorological conditions;

· at the site boundary or such locations close to the major dust emission source; and

· as close to the sensitive receivers as possible to reflect conditions at the sensitive receivers.

2.8 Event and Action Plan for Air Quality

2.8.1 The baseline monitoring results form the basis for determining the air quality criteria for the impact monitoring. The ETL shall compare the impact monitoring results with air quality criteria set up for 24-hour TSP and 1-hr TSP. Table 2.1 shows the air quality criteria, namely Action and Limit levels to be used. Should non-compliance with the air quality criteria occur, the ET, the ER and the Contractor shall undertake the relevant action in accordance with the Event Action Plan in Table 2.2.

Table 2.1 Action and Limit Levels for Air Quality

Parameters	Action	Limit*
24 Hour TSP Level in mg/m³	For baseline level < 200 mg/mAction level = (Baseline level * 1.3 + Limit level)/2; For baseline level > 200 mg/m Action level = Limit level	260
1 Hour TSP Level in mg/m³	For baseline level < 384 mg/m Action Level = (Baseline level * 1.3 + Limit level)/2; For baseline level > 384 mg/m Action level = Limit level	500
Airborne fiblre level in fibres/ml	0.006 f/ml	0.01

Table 2.2 Event/Action Plan for Air Quality

			ACTION
1. Exceedance for one sample	1. Identify source 2. Inform (C(E) and ER 3. Repeat measurement to confirm finding 4. Increase monitoring frequency to daily	1. Check monitoring data submitted by ET 2. Check Contractor’s working method	1. Notify Contractor 2. Check monitoring data and Contractor's working methods	1. Rectify any unacceptable practice 2. Amend working methods if appropriate
2. Exceedance for two or more consecutive samples	1. Identify source 2. Inform IC(E) and ER 3. Repeat measurements to confirm findings 4. Increase monitoring frequency to daily 5. Discuss with Contractor , IC(E) and ER for remedial actions required 6. If exceedance continues, arrange meeting with IC(E) and ER 7. If exceedance stops, cease additional monitoring	1. Checking monitoring data submitted by ET 2. Check Contractor’s working method 3. Discuss with ET and Contractor on possible remedial measures 4. Advise the ER on the effectiveness of the proposed remedial measures 5. Supervise implementation of remedial measures	1. Confirm receipt of notification of failure in writing 2. Notify Contractor 3. Check monitoring data and Contractor's working methods 4. Discuss with IC(E) and Contractor on potential remedial actions 5. Ensure remedial actions properly implemented	1. Submit proposals for remedial actions to ER within 3 working days of notification 2. Implement the agreed proposals 3. Amend proposal if appropriate
LIMIT LEVEL
1. Exceedance for one sample	1. Identify source 2. Inform ER and EPD 3. Repeat measurement to confirm finding 4. Increase monitoring frequency to daily 5. Assess effectiveness of Contractor's remedial actions and keep IC(E), EPD and ER informed of the results	1. Checking monitoring data submitted by ET 2. Check Contractor’s working method 3. Discuss with ET and Contractor on possible remedial measures 4. Advise the ER on the effectiveness of the proposed remedial measures 5. Supervisor implementation of remedial measures	1. Confirm receipt of notification of failure in writing 2. Notify Contractor 3. Check monitoring data and Contractor's working methods 4. Discuss with ET Leader and Contractor potential remedial actions 5. Ensure remedial actions properly implemented	1. Take immediate action to avoid further exceedance 2. Submit proposals for remedial actions to ER within 3 working days of notification 3. Implement the agreed proposals 4. Amend proposal if appropriate
2. Exceedance for two or more consecutive samples	1. Identify source 2. Inform IC(E), ER and EPD the causes & actions taken for the exceedances 3. Repeat measurement to confirm findings 4. Increase monitoring frequency to daily 5. Investigate the causes of exceedance, Contractor’s working procedures to identify possible mitigation 6. Arrange meeting with IC(E) and ER to discuss the remedial actions to be taken 7. Assess effectiveness of Contractor's remedial actions and keep IC(E), EPD and ER informed of the results 8. If exceedance stops, cease additional monitoring	1. Discuss amongst ER, ET and Contractor as the potential remedial actions 2. Review Contractor’s remedial actions whenever necessary to ensure their effectiveness and advise the ER accordingly 3 Supervise the implementation of remedial measures	1. Confirm receipt of notification of failure in writing 2. Notify Contractor 3. Carry out analysis of Contractor's working procedures with IC(E) to determine possible mitigation to be implemented 4. Discuss amongst Environmental Team Leader and the Contractor potential remedial actions 5. Review Contractor's remedial actions whenever necessary to assure their effectiveness 6. If exceedance continues, consider what portion of the work is responsible and instruct the Contractor to stop that portion of work until the exceedance is abated	1. Take immediate action to avoid further exceedance 2. Submit proposals for remedial actions to ER within 3 working days of notification 3. Implement the agreed proposals 4. Resubmit proposals if problem still not under control 5. Stop the relevant portion of works as determined by the ER until the exceedance is abated

ACTION

EVENT

IC(E)

CONTRACTOR

ACTION LEVEL

1. Exceedance for one sample

1. Identify source

2. Inform (C(E) and ER

3. Repeat measurement to confirm finding

4. Increase monitoring frequency to daily

1. Check monitoring data submitted by ET

2. Check Contractor’s working method

1. Notify Contractor

2. Check monitoring data and Contractor's working methods

1. Rectify any unacceptable practice

2. Amend working methods if appropriate

2. Exceedance for two or more consecutive samples

1. Identify source

2. Inform IC(E) and ER

3. Repeat measurements to confirm findings

4. Increase monitoring frequency to daily

5. Discuss with Contractor , IC(E) and ER for remedial actions required

6. If exceedance continues, arrange meeting with IC(E) and ER

7. If exceedance stops, cease additional monitoring

1. Checking monitoring data submitted by ET

2. Check Contractor’s working method

3. Discuss with ET and Contractor on possible remedial measures

4. Advise the ER on the effectiveness of the proposed remedial measures

5. Supervise implementation of remedial measures

1. Confirm receipt of notification of failure in writing

2. Notify Contractor

3. Check monitoring data and Contractor's working methods

4. Discuss with IC(E) and Contractor on potential remedial actions

5. Ensure remedial actions properly implemented

1. Submit proposals for remedial actions to ER within 3 working days of notification

2. Implement the agreed proposals

3. Amend proposal if appropriate

LIMIT LEVEL

1. Exceedance for one sample

1. Identify source

2. Inform ER and EPD

3. Repeat measurement to confirm finding

4. Increase monitoring frequency to daily

5. Assess effectiveness of Contractor's remedial actions and keep IC(E), EPD and ER informed of the results

1. Checking monitoring data submitted by ET

2. Check Contractor’s working method

3. Discuss with ET and Contractor on possible remedial measures

4. Advise the ER on the effectiveness of the proposed remedial measures

5. Supervisor implementation of remedial measures

1. Confirm receipt of notification of failure in writing

2. Notify Contractor

3. Check monitoring data and Contractor's working methods

4. Discuss with ET Leader and Contractor potential remedial actions

5. Ensure remedial actions properly implemented

1. Take immediate action to avoid further exceedance

2. Submit proposals for remedial actions to ER within 3 working days of notification

3. Implement the agreed proposals

4. Amend proposal if appropriate

2. Exceedance for two or more consecutive samples

1. Identify source

2. Inform IC(E), ER and EPD the causes & actions taken for the exceedances

3. Repeat measurement to confirm findings

4. Increase monitoring frequency to daily

5. Investigate the causes of exceedance, Contractor’s working procedures to identify possible mitigation

6. Arrange meeting with IC(E) and ER to discuss the remedial actions to be taken

7. Assess effectiveness of Contractor's remedial actions and keep IC(E), EPD and ER informed of the results

8. If exceedance stops, cease additional monitoring

1. Discuss amongst ER, ET and Contractor as the potential remedial actions

2. Review Contractor’s remedial actions whenever necessary to ensure their effectiveness and advise the ER accordingly

3 Supervise the implementation of remedial measures

1. Confirm receipt of notification of failure in writing

2. Notify Contractor

3. Carry out analysis of Contractor's working procedures with IC(E) to determine possible mitigation to be implemented

4. Discuss amongst Environmental Team Leader and the Contractor potential remedial actions

5. Review Contractor's remedial actions whenever necessary to assure their effectiveness

6. If exceedance continues, consider what portion of the work is responsible and instruct the Contractor to stop that portion of work until the exceedance is abated

1. Take immediate action to avoid further exceedance

2. Submit proposals for remedial actions to ER within 3 working days of notification

3. Implement the agreed proposals

4. Resubmit proposals if problem still not under control

5. Stop the relevant portion of works as determined by the ER until the exceedance is abated

3. Noise

3.1.1 EM&A procedures for noise are recommended to ensure that the necessary controls are implemented effectively and that the noise criteria are not exceeded.

3.4 Monitoring Locations

3.4.1 The noise sensitive receivers are shown in Figure 1.1. The monitoring locations are shown in Figure 3.1.

3.4.2 The status and locations of noise sensitive receivers may require review after issuing this manual. It is proposed that the ET shall revise the monitoring locations to be adopted based on prevailing conditions. These shall be agreed with the ER, IC(E) and relevant government departments.

3.4.3 Monitoring locations shall be based on the following criteria:

· at locations close to the major site activities which are likely to have noise impacts; and

· close to the noise sensitive receivers.

3.4.4 Monitoring locations located in the vicinity of the sensitive receivers must be operated with care to ensure minimal disturbance to the occupants during monitoring. Monitoring at SRs premises also introduces a complication for the implementation of the baseline monitoring of permission and access at the SRs cannot be confirmed in time. Therefore in this case it is recommended that monitoring be undertaken at the site boundary, just inside the site hoarding, in an area under the control of the project proponent. This will ensure a conservative approach.

3.4.5 The following locations are identified as suitable monitoring locations Figure 2.1):

· Site Boundary opposite Jockey Club Clinic/St. Luke’s Church and Lui Ming Choi Memorial Primary School *

· Site boundary east of KTIP

· Site boundary opposite future UPA Development in Cadogan Street, Sai Wan New Apartments, Kennedy Mansion and Cheong Kat Building

3.4.6 The sensitive receivers are sufficiently close by and for purposes of baseline monitoring purposes, three locations should be monitored.

3.4.7 Preliminary proposed monitoring locations are shown in Figure 3.1. Each monitoring station shall normally be at a position 1.2m above the ground, just inside the site hoarding. If there is a problem with access to the normal monitoring position, an alternative position may be chosen, and a correction to the measurements shall be made. For reference, a correction of +3dB(A) shall be made to the free field measurements.

3.4.8 The ETL shall agree with the ER, the monitoring position and the corrections to be adopted. Once the positions for the monitoring stations are chosen, the baseline monitoring and the impact monitoring shall be carried out at the same positions.

3.6 Impact Monitoring

3.6.1 Noise monitoring shall be carried out at 3 locations per week. The monitoring frequency shall depend on the scale of the construction activities. The following defines the regular monitoring frequency for 3 stations on a per week basis when noise generating activities are underway:

a) One set of measurements between 0700-1900 hours on normal weekdays

b) One set of measurements between 1900-2300 hours (if evening activities are undertaken)

c) One set of measurements between 2300-0700 hours next day (if there are night activities).

d) One set of measurements between 0700-1900 hours on holidays (if work is undertaken)

3.6.2 For measurements b), c) and d) above, one set of measurements shall at least include 3 consecutive Leq (5 min) results.

3.6.3 As demolition activity is likely to take place near one primary school, noise monitoring shall be carried out at a monitoring station near the school during examination periods. The ETL shall liaise with the school staff and the Examination Authority to ascertain the exact dates and times of all examination periods during the course of the contract.

3.6.4 In case of non-compliance with the construction noise criteria, more frequent monitoring may be required in line with the Event Action Plan. This additional monitoring shall be continued until the recorded noise levels are rectified or proved to be unrelated to the demolition activities.

3.7 Event and Action Plan for Noise

3.7.1 The Action and Limit levels for construction noise are defined in Table 3.1. Should non-compliance of the criteria occur, action in accordance with the Action Plan in Table 3.2, shall be carried out.

Table 3.1 Action and Limit Levels for Construction Noise

Time Period	Action	Limit
0700-1900 hrs on normal weekdays		75*dB(A)
0700-2300 hrs on holidays; and 1900-2300 hrs on all other days	When one documented complaint is received	60/65/70**dB(A)
2300-0700 hrs of next day		45/50/55**dB(A)

* reduce to 70dB(A) for schools and 65 dB (A) during school examination periods.

** to be selected based on Area Sensitivity Rating as defined under the Noise Control Ordinance.

3.8 Noise Mitigation Measures

3.8.1 The EIA has discussed the noise mitigation measures in general terms. These are given in more detail below. Noise mitigation measures are identified in Section 10.

3.8.2 The Contractor shall consider noise as an environmental constraint in his planning and execution of the Works.

3.8.3 The Contractor shall take all necessary measures to ensure that the operation of all mechanical equipment and construction processes on or off the Site shall not cause any unnecessary and excessive noise which may disturb any occupant of any nearby dwellings, schools, clinic, or premises with sensitivity to noise. Prior to commencement of demolition activities, the Contractor shall submit to the ER for his approval details of all Construction Plant, including methods of use and construction operations, together with proposed measures for limiting noise. These shall include, but not be limited to, the likely location of noise-emitting plant, the use of silencers, mufflers, acoustic sheds, shields, or screens and shall be based upon the best reasonable practice. Information on the types and models of silenced equipment and acoustic treatment for unsilenced equipment shall be included. The Contractor shall use all such measures and shall maintain all plant and silencing equipment in good condition so as to minimise the noise emission during construction works.

3.8.4 The Contractor’s attention is drawn to all Regulations made under the Noise Control Ordinance. Those currently in force are :-

· Noise Control (Hand Held Percussive Breakers) Regulations

· Noise Control (Air Compressors) Regulations

· Noise Control (Hearing Protection) Regulations

· The Factories and Industrial Undertakings (Noise at Work) Regulations are also applicable.

3.8.5 The Contractor shall be responsible for obtaining Construction Noise Permits (CNPs) from EPD as required for his operations. The locations of Noise Sensitive Receivers (NSRs) are indicated in Clause 3.3 of this manual, but the Contractor for obtaining and complying with EPD’s requirements regarding identification of any additional NSRs and conditions attached to CNPs. All correspondence with EPD and each issued CNP shall be copied to the ER and IC(E).

3.8.6 The Contractor’s attention shall be drawn to the fact that other construction work in the vicinity of the Site will be taken into account by EPD in assessing applications for CNP.

3.8.7 The Contractor shall arrange methods of working to minimise noise impacts, and shall provide experienced personnel to ensure that these methods are implemented.

3.8.8 If after commencement of the Works the Construction Plant, equipment, or methods of working are believed by the ER to be causing serious noise pollution impacts, they shall be inspected and remedial proposals drawn up by the Contractor, consented to by the ER and implemented. In developing these remedial measures, the Contractor will be expected to review all construction noise sources that may be contributing to the pollution impacts in order to achieve an overall reduction of cumulative noise impacts. The Contractor will propose changes to plant locations and scheduling of activities, installation of plant soundproofing, provision of alternative plant, erection of sound barriers around part of the Site or the location of construction noise sources, or any other measures that may be effective in reducing noise. Where such remedial measures include the use of additional or alternative Constructional Plant or equipment, such Constructional Plant or equipment shall not be used on the Works until the ER’s consent has been given. Where remedial measures include maintenance or modification of previously approved Constructional Plant or equipment such Constructional Plant or equipment shall not be used on the Works until such maintenance or modification is completed and the adequacy of the maintenance or modification is demonstrated to the satisfaction of the ER.

3.8.9 If the above measures are not sufficient to restore the construction noise quality to an acceptable level upon the advice of ETL, the Contractor shall liaise with the ETL on alternative mitigation measures, propose to ER for Approval, and carry out the mitigation measures.

Table 3.3 Noise Monitoring Field Record Sheet

Monitoring Location
Description of Location
Date of Monitoring
Measurement Start Time (hh:mm)
Measurement Time Length (min.)
Noise Meter Model/Identification
Calibrator Model/Identification
	L₉₀ (dB(A))
Measurement Results	L₁₀ (dB(A))
	Leq (dB(A))
Major Construction Noise Source(s) During Monitoring
Other Noise Source(s) During Monitoring
Remarks

		Name & Designation	Signature	Date
Recorded By	:
Checked by	:

4. Water Quality

4.1 Sources of Water Quality Impacts

4.1.1 Surplus water may arise on site from three main sources. During the demolition works when it rains site run-off and surface water drainage have the potential to contain elevated levels of suspended solids. During the soil remediation phase site run-off and surface water drainage will remain as a potential impact but it may also be the case that soil decontamination procedures (including dewatering) result in the generation of surplus water for disposal. Sewage effluents generated from the workforce may also occur in both phases.

4.1.2 Site run-off and drainage should be prevented or minimised in accordance with the guidelines stipulated in the EPD Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94). Reuse of water on site is to be encouraged wherever possible. Good housekeeping and storm-water best management practices, detailed below, shall be implemented to ensure that WPCO standards are met and that no unacceptable impacts on the WSR arise due to the demolition of KTCDA. All discharges from the site shall be controlled in order to comply with the standards for effluents discharged into the Victoria Harbour WCZ under the TM.

4.3 Site Run-off and Surface Water Drainage during Demolition

4.3.1 Whereas the majority of the site has a hard concrete covering the area of potentially exposed soil will be minimal. Such areas and the accumulation of dust and fine waste material shall be kept to a minimum to reduce the potential for siltation, contamination of run-off, and erosion.

Mitigation Measures

4.3.2 Run-off related impacts associated with demolition work and other general activities can all be readily controlled through the use of appropriate mitigation measures which include:

· The use of sediment traps, where appropriate; and

· The adequate maintenance of drainage systems to prevent flooding and overflow.

4.3.3 Critical areas within the Site shall be clearly marked and provided with protective measures to control site run-off. Temporary channels shall be provided to facilitate run-off discharge into the appropriate watercourses, via a silt retention pond. Permanent drainage channels shall incorporate sediment basins or traps and baffles to enhance deposition rates.

4.3.4 Temporary and permanent drainage pipes and culverts which are provided to facilitate run-off discharge shall be adequately designed for the controlled release of storm flows. All sediment traps shall be regularly cleaned and maintained. Temporarily diverted drainage shall be reinstated to its original condition when the demolition work has finished or the temporary diversion is no longer required.

4.3.5 Wheel washing facilities will be installed to ensure no earth, mud and debris is deposited on roads. Sand and silt in the wash water from such facilities shall be settled out and removed before (in line with effluent discharge standards, Appendix C) discharging the used water into storm drains. A section of the road between the wheel washing bay and the public road shall be paved with backfall to prevent wash water or other site run-off from entering public road drains.

4.3.6 Oil interception facilities should be provided in appropriate areas in the drainage system, where oil spills may occur, and regularly emptied to prevent the release of oil and grease into the storm water drainage system after accidental spillage.

4.3.7 Provided the surface run-off and drainage are effectively managed and controlled over the site, adverse water quality impacts can be avoided.

4.3.8 All demolition works will be land based and the EIA concludes that no insurmountable water quality impacts will result from the demolition work of KTCDA provided that:

· All the recommended mitigation measures including appropriate drainage and silty run-off collection facilities are incorporated in accordance with the recommendations of ProPEC PN 1/94;

· All demolition workforce sewage is discharged either to foul sewer or to temporary portable toilets, as appropriate according to the demolition programme and methodology;

· All temporary drainage diversions will be reinstated to the original condition after the demolition works are completed and implemented properly, in accordance with the recommendations of ProPECC PN 1/94; and

· All demolition works area discharges must comply with the TM standards of the WPCO in respect of all applicable WQ parameters. Any practical options for the diversion and re-alignment of drainage should comply with both engineering and environmental requirements. General Demolition Activities

4.3.9 Debris and rubbish on site should be collected, handled and disposed of properly to prevent such material from entering the water column and causing water quality impacts. The solid waste management requirements are presented later in this report.

4.3.10 If required, fuel storage areas should be provided with locks and be sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest container (to provide a safety margin) and control spilt fuel oils.

4.3.11 The effects on water quality from these demolition activities are likely to be minimal provided that site boundaries are well maintained and good site practice is observed to ensure that litter and fuels are managed, stored and handled properly

4.3.12 It is considered that controls on discharges from land based demolition activities and proper site management procedures, as referenced above, will minimise residual water quality impacts to the acceptable levels stipulated in the WPCO criteria.

4.4 Site Run-off and Surface Water Drainage during Soil Remediation

Site Run - off

4.4.1 The above mitigation shall also apply generally to all excavated and/or stockpiled materials during the soil remediation process. In practice the consultants experience suggests that runoff from the site can be controlled even though the hard concrete covering is removed in places and the area of potentially exposed soil in greater than during the demolition. Surplus water arising from dewatering is to be collected on site for re-use where possible (see below).

4.4.2 The exposed areas and the accumulation of dust and fine waste material shall be kept to a minimum to reduce the potential for siltation, contamination of run-off, and erosion. It is recommended that the mixing of concrete with contaminated soil be carried out on an area with cover and concrete paved floor with bunding to control run-off, especially if heavy rain were to occur during the period while the cement sets. Bunding or sand-bagging around the excavated pits is also recommended to minimise ingress of water. However, impacts associated with this work and other general activities can be all readily controlled through the use of appropriate mitigation measures mentioned above.

Dewatering

4.4.3 In addition, the Contractor is strongly advised to operate any necessary ground remediation works such that discharge of groundwater should be kept to minimum. This could be achieved by:

· minimising the ingress of surface water, which would mix with groundwater extracted during ground excavation if any; and

· reusing water on-site in ground remediation processes (mixing with cement).

4.4.4 In a case where any surplus groundwater is generated the Contractor must ensure that any effluent that requires to be discharged from the site satisfies the TM Requirements under the WPCO (Appendix C).

4.4.5 Surplus water arising from dewatering is to be collected on site for re-use where possible. Groundwater and leachate shall be reused and mixed with cement in the immobilisation process for contaminated soils. Surplus groundwater shall be collected and tested for metals and other pollutants for compliance with standards for effluents discharged into the Victoria Harbour WCZ under the TM and other parameters to be agreed with EPD prior to any consent being given to discharge. If the concentrations of contaminants exceed the standards the surplus water shall be treated.

Treatment of Surplus Groundwater Prior to Discharge

4.4.6 Treatment methods for any surplus contaminated groundwater, such as the addition of chemicals have been covered in the EIA. These industry standard methods will precipitate out contaminants and floating free products can be removed using an interceptor tank by flotation. The contractor shall therefore make provisions to include for treatment of surplus groundwater to reduce chemical concentrations in order to comply with the standards for effluents discharged into the inshore waters of Victoria Harbour WCZ under the TM.

4.4.7 The EIA has indicated that it is not possible to rule out the requirement to discharge leachate. If the volumes are low it is possible that limited quantities could be discharged to the foul sewer. In this case the necessary permissions and discharge licences would need to be obtained from the authorities under the relevant legislation. However the contractor shall not discharge directly or indirectly into any public sewer stormwater drain any effluent or contaminated water without the prior written consent of the site engineer in consultation with the Director of Environmental Protection (DEP). In granting this permission the DEP may require the contractor to maintain suitable works for the treatment and disposal of such effluent or contaminated water (surplus groundwater or leachate). The contractor shall therefore make provisions to include for treatment of surplus groundwater or leachate to reduce chemical concentrations in order to comply with the standards for effluents discharged into the inshore waters of Victoria Harbour WCZ. These facilities should be in place before the need arises to make any discharge of such effluent.

5. Waste Management

5.1.1 The Contractor shall be responsible for waste control within the construction site, removal of the waste material produced from the site and implementation of any mitigation measures to minimise waste or redress problems arising from the waste from the site. The waste material will include

5.1.2 The variety of wastes generated from demolition activities can be divided into certain categories based on the constituent elements and include:

· Construction and Demolition (C&D) materials;;

· Chemical waste; and

· General refuse.

5.1.3 The environmental impacts from the various waste types are summarised in Table 5.1.

Table 5.1 Summary of Waste Management Impacts

Waste Type	General Evaluation
C&D material	The total quantities of C&D materials which will be generated will be about 250te day^-1, in comparison with the disposal capacity available at public filling areas, it is small. Due to the inert nature of most C&D material and the availability of public filling areas, disposal is not likely to raise long term environmental concerns.
Chemical Waste	A small volume of chemical waste, as well as asbestos containing roofing materials and weather cladding (estimate., up to 8,000m²) will be produced. Temporary storage on site, handling, transport and disposal must be in accordance with the Code of Practice on the Handling, Transportation and disposal of Asbestos Waste. Provided that this occurs, and chemical wastes are disposed of at a licensed facility, and there will be little environmental impact.
General Refuse	If good practice is adhered to and all feasible avoidance, reuse and recycling opportunities are taken, including minimising over ordering, there should be minimal impact.

5.2 Mitigation Measures

Introduction

5.2.1 This section sets out recycling, storage, transportation and disposal measures which are recommended to avoid or minimise potential adverse impacts associated with waste arisings from the demolition of the KTCDA, under the headings of each waste type. The Contractor should incorporate these recommendations into a comprehensive on-site waste management plan. Such a waste management plan should incorporate site specific factors, such as the designation of areas for the segregation and temporary storage of reusable and recyclable materials.

Waste Management Hierarchy

5.2.2 The various waste management options can be categorised in terms of preference from an environmental viewpoint. The options considered to be more preferable have the least impacts and are more sustainable in a long term context. Hence, the hierarchy is as follows:

· Avoidance and minimisation by not generating waste through changing or improving practices and design;

· Reusing materials and therefore avoiding disposal (generally with only limited reprocessing);

· Recovery and recycling, avoiding disposal (although reprocessing may be required); and

· treatment and disposal, according to relevant laws, guidelines and good practice.

5.2.3 The Waste Disposal Authority should be consulted by the Contractor on the final disposal of wastes.

5.2.4 This hierarchy should be used to evaluate waste management options, thus allowing maximum waste reduction and often reducing costs. For example, by reducing or eliminating over-ordering of materials required to undertake the demolition, waste is avoided and costs are reduced both in terms of purchasing and in disposing of wastes.

C&D material

5.2.5 At this stage a broad estimate up to 2500m³ of C&D materials will arise at the KTCDA demolition site each month, however this may change subject to the Contractor’s programme. Generation of C&D waste requiring disposal at landfill(s) is estimated to be a relatively low proportion of this total. In order to minimise waste and maintain environmental impacts within acceptable levels, the mitigation measures described below should be adopted. It can also be expected that some small quantities of oil stained concrete will be generated and these will need to be treated as chemical waste for disposal purposes and appropriate measures are described.

5.2.6 In accordance with the New Disposal Arrangement for Construction Waste, Environmental Protection Department, 1992, disposal of C&D material can either be at a specified landfill, or as public fill with the latter being the preferred option. However C&D materials currently comprise a high proportion of C&D waste inputs to landfills and in order to maximise landfill life, Government policy prohibits the disposal of C&D material to landfill if it contains more than 20% inert material by volume. Such inert wastes are directed to reclamation areas, where they have the added benefit of offsetting the need for removal of materials from terrestrial borrow areas for reclamation purposes. In the same way that materials which may be recycled should be segregated from other wastes, clean inert waste, suitable for disposal at public filling areas, should be segregated from any ‘contaminated’ wastes which will require landfill disposal.

5.2.7 The Contractor should recycle C&D material on-site as far as possible. Planning, careful design and good site management of the demolition process can minimise over ordering and avoidable waste. Areas within the Site areas can be segregated for the separation and storage. Proper segregation of wastes on site will increase the feasibility of utilising recycling Contractors to recycle certain components of the waste stream. Concrete and masonry can be crushed and used as fill to level the site after demolition. However there will be little or no excavation of any underground structures therefore the majority of inert waste will need to be delivered to public filling areas. Steel reinforcing bars can be re-used by scrap steel mills.

5.2.8 If landfill disposal has to be used, the C&D wastes will most likely be delivered to the WENT Landfill or SENT Landfill. Government is currently studying the possibilities of introducing a pilot C&D waste recycling facility that would offer another alternative if it were in operation by the time demolition for KTCDA takes place.

5.2.9 The provisions of WBTC No. 5/98 (On Site Sorting of Construction Waste on Demolition Sites) shall be followed. At present, Government is developing a charging policy for the disposal of C&D waste to landfill. When it is implemented, this will provided additional incentive to reduce the volume of waste generated and hence encourage the appropriate sorting and segregation of different types of C&D material.

Chemical Waste

5.2.10 For those processes that generate chemical waste, it may be possible to find alternatives which generate reduced quantities or even no chemical waste, or less dangerous types of chemical waste.

5.2.11 Chemical waste that is produced, as defined under section 3 of the Waste Disposal (Chemical Waste) (General) Regulation, should be handled in accordance with the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes as follows.

5.2.12 Containers used for the storage of chemical wastes should:

· Be suitable for the substance they are holding, resistant to corrosion, maintained in a good condition, and securely closed;

· Have a capacity of less than 450l unless the specifications have been approved by the EPD; and

· Display a label in English and Chinese in accordance with instructions prescribed in Schedule 2 of the Regulations.

5.2.13 The storage area for chemical wastes should:

· Be clearly labelled and used solely for the storage of chemical waste;

· Be enclosed on at least 3 sides;

· Have an impermeable floor and bunding, of capacity to accommodate 110% of the volume of the largest container or 20% by volume of the chemical waste stored in that area, whichever is the greatest;

· Have adequate ventilation;

· Be covered to prevent rainfall entering (water collected within the bund must be tested and disposed as chemical waste if necessary); and

· Be arranged so that incompatible materials are adequately separated.

5.2.14 Disposal of chemical waste should:

· Be via a licensed waste collector; and

· Be to a facility licensed to receive chemical waste, such as the Chemical Waste Treatment Facility which also offers a chemical waste collection service and can supply the necessary storage containers; or

· Be to a recycling or reprocessing facility licensed by EPD.

5.2.15 The Centre for Environmental Technology operates a Waste Exchange Scheme which can assist in finding receivers or buyers.

5.2.16 Asbestos waste that is produced should be handled in accordance with the Code of Practice on the Handling, Transportation and Disposal of Asbestos Wastes. The detailed requirements will be presented in the Asbestos Study Report.

Disposal of Residual Rubble / Ash Waste (Between KTIP Chimneys)

5.2.17 EPD indicated that the PCDD/PCDF contaminated rubble / ash waste (300m³approx.) could be disposed of at CWTC. Remedial action has been recommended and action will be required to clean up these materials prior to the demolition. Treatment on-site prior to disposal at a landfill is the preferred method. This material must be immobilised on site, tested to ensure compliance with TCLP testing requirements (Appendix D) and removed by an appropriately qualified specialist contractor and must be collected, deposited at landfill in accordance with criteria and conditions as specified in agreement with EPD.

5.2.18 The proposed method of disposal is for the ash waste to be collected up and stabilised to meet landfill disposal criteria of EPD. In this case it is envisaged that the process would involve collection and mixing the ash material with cement. Pilot mixing and TCLP tests should establish the ratio of cement to ash to the satisfaction of EPD. The materials for disposal would then be treated and the extracted material placed into polythene lined steel drums. Transparent plastic sheeting of 0.15mm thickness low-density polythene or PVC should be employed. The drums should be 16 gauge steel or thicker and fitted with double bung fixed ends adequately sealed and well labelled in new or good condition. Prior agreement of the disposal criteria from EPD and agreement to disposal from the landfill operator must be obtained.

5.2.19 The SENT Landfill has been identified as the appropriate location for disposal. However, disposal at the CWTC should be considered as a fall back option (as a last resort) if the landfill disposal criteria cannot be met.

Protection of Site Workers

5.2.20 The release of contaminants from disturbed ash should be minimised prior to gathering up the ash materials and amended water containing a wetting agent should be sprayed on the ash. The wetting agent will assist in water penetration to thoroughly soak the ash and ensure dust levels are reduced without use of excessive water. (Spray shall comprise 50% polyoxyethylene ester and 50% polyoxyethylene ether, or equivalent, diluted to specific concentration in accordance with the manufacturer’s instructions). The use of amended water for dust suppression will minimise the use of excessive water that would result in surface runoff in the removal process. Dust suppression can therefore be carried out in a controlled manner and no insurmountable environmental problem would result.

5.2.21 Given the nature of the work and the contaminants involved consideration should be given to the use of decontamination facilities (showers) that should be provided for the work force to remove contamination after work.

5.2.22 Preliminary provisions for the protection of workers during the management of the ash removal are presented in Appendix E.

5.2.23 Handling, transportation and disposal of the ash waste shall be carried out according to the relevant regulations.

5.2.24 As a fall back option the materials can be transported to the CWTC for disposal if the landfill criteria cannot be met. No PCDD/PCDF were detected above the USEPA criterion at any other locations in soil samples. Remedial action will be required to clean up these materials prior to the demolition. The material that is contaminated is deposited on the walls. As such, there is no opportunity for in-situ containment or treatment of this material in the context of the ultimate redevelopment of the site. Therefore, there is no alternative but to dispose of this material offsite. This should be undertaken prior to the demolition of any structures.

General Refuse

5.2.25 General refuse should be stored in enclosed bins or compaction units separate from demolition and chemical wastes. A reputable waste collector should be employed by the Contractor to remove general refuse, separately from C&D material and chemical wastes, daily to minimise odour, pest and litter impacts. The burning of refuse on construction sites is prohibited by law.

5.2.26 General refuse is generated largely by food service activities on site, so reusable rather than disposable dishware should be used if feasible. Aluminium cans are often recovered from the waste stream by individual collectors if they are segregated or easily accessible, so separate, labelled bins for their deposit should be provided if feasible.

5.2.27 Office wastes can be reduced through recycling of paper if volumes are large enough to warrant collection. Participation in a local collection scheme should be considered if one is available.

Storage areas for different waste types

5.2.28 Different types of waste should be segregated and stored in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal.

5.2.29 An on-site temporary storage area should also be provided.

Trip-ticket system

5.2.30 In order to monitor the disposal of C&D and solid wastes at public filling facilities and landfills, and control fly-tipping, a trip-ticket system (Works Bureau Technical Circular No. 5/99, Trip-ticket System for Disposal of Construction and Demolition Material) should be included as one of the contractual requirements and implemented under the supervision of the Environmental Team. The system should be subject to independent auditing by the IC(E).

Training and Records of wastes

5.2.31 A waste management plan will be requited under Works Bureau Technical Circular No. 29/2000. This should include a description of the training proposed to educate the workforce on the requirements of the Waste Disposal Ordinance, subsidiary legislation and guidelines listed above. The training should include, as a minimum, arrangements for waste management, On Site Sorting of Construction Waste on Demolition Sites (WBTC No. 5/98), Trip-ticket System for Disposal of Construction and Demolition Material (WBTC No. 5/99).

5.2.32 A recording system for the amount of wastes generated, recycled and disposed (including the disposal sites) should be proposed.

5.3 Waste Management Requirements

5.3.1 This section describes waste management requirements and provides practical actions which can be taken to minimise the impacts arising as a result of the generation, storage, handling, transport and disposal of wastes. A Waste Management Plan will be required for all stages of the demolition and soil remediation works in line with Works Bureau Technical Circular No. 29/2000.

5.3.2 Waste reduction is best achieved at the planning and design stage, as well as by ensuring that processes are run in the most efficient way. Good management and control can prevent the generation of significant amounts of waste. For unavoidable wastes, reuse, recycling and optimal disposal are most practical when segregation occurs on the demolition site, as follows:

· Public fill (inert) for disposal at public filling areas;

· C&D waste (non-inert) for landfill;

· Chemical waste for treatment at licensed facilities; and

· General refuse for disposal at landfill.

5.3.3 The criteria for sorting solid waste is described in New Disposal Arrangements for Construction Waste, Environmental Protection Department and Civil Engineering Department, 1992 and Works Bureau Technical Circular No. 5/98, On Site Sorting of Construction Waste on Demolition Sites. C&D material containing in excess of 20% by volume of inert materials should be segregated from C&D waste with a larger proportion of putrescible material. In preference the inert materials shall be directed to the proposed Pilot C&D Waste Recycling Facility at Kai Tak and after early 2005 excess materials could be directed to the adjacent proposed public filling barging point on Area 30D.

5.3.4 Proper storage and site practices will minimise the damage to, or contamination of, demolition C&D materials that may reduce their recyclability and suitability for disposal in public filling areas. On site measures may be implemented which promote the proper disposal of wastes once off-site. For example having separate skips for inert (rubble, sand, stone, etc) and non-inert (wood, organics, etc) materials would help to ensure that the former are taken to public filling areas, while the latter are properly disposed of at controlled landfills. Since public fill brought to public filling areas will not attract a charge, while C&D waste taken to landfill may attract some charge in the future, separating C&D material may also help to reduce waste disposal costs, should landfill charging be introduced.

5.3.5 Specifically, it is recommended that:

· Wastes should be handled and stored in a manner which ensures that they are held securely without loss or leakage thereby minimising the potential for pollution;

· Only reputable waste collectors authorised to collect the specific category of waste concerned should be employed;

· Appropriate measures should be employed to minimise windblown litter and dust during transportation by either covering trucks or transporting wastes in enclosed containers;

· The necessary waste disposal permits should be obtained from the appropriate authorities, if they are required, in accordance with the Waste Disposal Ordinance (Cap 354), Waste Disposal (Chemical Waste) (General) Regulation and the Government Land Ordinance (Cap 28);

· Collection of general refuse should be carried out frequently, preferably daily;

· Waste should only be disposed of at licensed sites and site staff and the civil engineering Contractor should develop procedures to ensure that illegal disposal of wastes does not occur;

· Waste storage areas should be well maintained and cleaned regularly; and

· Records should be maintained of the quantities of wastes generated, recycled and disposed, determined by weighing each load.

EM&A Requirements

5.3.6 It is recommended that auditing of each waste stream, including any waste arising from the decontamination of soils and the remediation procedures should be carried out periodically by the EM&A Team to determine if wastes are being managed in accordance with approved procedures. The audits should look at all aspects of waste management including waste generation, storage, recycling, treatment, transport, and disposal. An appropriate audit programme would be to undertake a first audit at the commencement of the demolition works, and then to audit quarterly thereafter.

5.3.7 It is likely that relatively small quantities of C&D materials will require disposal at landfill. The bulk of the C&D materials will be disposed at public filling areas and some, in particular reinforcement bar, will be recycled. Limited quantities of chemical wastes (mainly asbestos) and general wastes will be generated. Mitigation measures relating to good practice have been recommended to ensure that adverse environmental impacts are prevented and that opportunities for waste minimisation and recycling are followed.

5.3.8 Provided that the recommendations are thoroughly implemented the storage, handling, collection, transport, and disposal of wastes arising from the demolition of KTCDA will be in full compliance with the regulatory requirements.

Table 6.1 Actions Required Post Demolition

Borehole	Action Required	Remove concrete surface and clear uncontaminated surface material and stockpile	Proposed depth of Material for Removal or Treatment	Remedial Action	Estimate quantity of contaminated material for Treatment (m³, #)	Reassurance / Confirmatory Sampling	Sampling Strategy
TB1	Yes	Concrete down to 0.3m depth	Immediately below concrete 0.3m to 4.0m	Immobilisation for 0.3m to 2.0m and 3.0m to 4.0m* TCLP test followed by removal of 2.0m to 3.0m to landfill. Immobilisation if TCLP tests exceed criteria **.	100 to be removed to landfill + 270 @	Yes, determine extent of HM (Cd, Cu, Pb, Zn and Hg) and TPH contamination at edge and base of excavated hole.*	5 samples 5m N, S, E ,W and base of borehole.
TB2	Yes	Concrete down to 0.5m depth	Immediately below concrete 0.5m to 1.5m	Immobilisation*	100	Yes, determine extent of HM (As, Cu, Pb and Zn) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E ,W and base of borehole.
TB3	Yes	Concrete down to 2.5m depth	2.5m to 3.5m	Immobilisation *	100	Yes, determine extent of HM (Cu, Pb, Zn and Hg) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB4	Yes	Down to 2.2m depth	2.2m to 4.2m	Immobilisation *	200	Yes, determine extent of HM (As, Cu, Pb and Zn) contamination at edge and base of excavated hole.*	4 samples 5 m N, S, E & W of borehole plus one at base of hole layer
TB5	Yes	Concrete down to 1.8m. Down to 2.5m depth	2.5m to 4.0m	Immobilisation*	200	Yes, determine extent of HM (Pb) contamination at edge and base of excavated hole.*	4 samples 5 m N, S, E & W of borehole plus one at base of hole layer
TB6	No	N/A	N/A	N/A	0	N/A	N/A
TB7	No	N/A	N/A	N/A	0	N/A	N/A
TB8	Yes	Concrete down to 1m. Down to 2.5m	2.5m to 3.5m	TCLP test followed by removal of 2.5m to 3.5m to landfill. Immobilisation if TCLP tests exceed criteria **.	100 to be removed to landfill @	Yes, determine extent of PAH contamination at edge and base of excavated hole.*	5 samples 5m N, S, E ,W and base of borehole.
TB9	Yes	Concrete down to 1.0m depth	1.0m to 2.0m	Immobilisation*	100	Yes, determine extent of HM (Pb) contamination at edge and base of excavated hole.*	4 samples 5m N, S, E & W and base of borehole.
TB10	Yes	Surface rubble/ash and brick material (not soil) about 1.5m depth.	1.5 m	Clear Waste to landfill. Waste to be treated and tested to meet EPD disposal criteria.	Up to, say, 300m³ (surface material, not for in-situ treatment) @	Yes, determine extent of HM (As, Cd, Cu, Pb, Zn) TPH and PCDD/PCDF contamination under surface contaminated materials.*	4 samples 5 m N, S, E & W of borehole plus one at bore hole
TB10a	No	N/A	N/A	N/A	0	N/A	N/A
TB11	Yes	Down to 1.5m depth	1.5 m	Clear Waste to landfill. Waste to be treated and tested to meet EPD disposal criteria.	(See TB10, for materials not for in-situ treatment)	Yes, determine extent of HM (Cd, Cu, Pb, and Zn) and PCDD/PCDF contamination under surface contaminated materials.*	5 samples 5m N, S, E & W of borehole plus one at borehole
TB11	Yes	Below hardstanding surface (soil materials)	1.5 to 4.0m	Immobilisation*	200 (for in-situ treatment)	Yes, to determine extent of HM (Pb) contamination at edge and base of excavated hole.	5 samples 5m N, S, E & W of borehole plus one at base of hole layer
TB12	Yes	Concrete down to 0.5m	0.5 to 1.5m	Immobilisation*	100	Yes, determine extent of HM (Cd, Cu, Pb and Zn) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB13	Yes	Down to 2.5m	2.5m to 3.5m	Immobilisation*	100	Yes, determine extent of HM (Pb, Zn, Hg) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB14	No	N/A	N/A	N/A	0	N/A	N/A
TB15	Yes	Concrete down to 0.4m	0.4 to 2.4m	TCLP test followed by removal of 0.4m to 2.4m to landfill. Immobilisation if TCLP tests exceed criteria **.	200 to be removed to landfill @	Yes, determine extent of HM (As, Cu, Pb, Hg and Zn) and PAH contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB16	Yes	Concrete down to 0.8m	0.8 to 4.3m	Immobilisation *	350	Yes, determine extent of HM (Cu, Pb and Zn) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB17	Yes	Concrete down to 0.4m	0.4 to 2.4m	Immobilisation *	200	Yes, determine extent of HM (Pb and Hg) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB18	Yes	Concrete down to 1.0m	1.0m to 2.0m	Immobilisation *	100	Yes, determine extent of HM (Pb) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB19	Yes	Concrete down to 0.6m	0.6m to 4.0m	Immobilisation *	375	Yes, determine extent of HM (Pb and Hg) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB20	Yes	Concrete down to 0.3m	0.3m to 2.3m	TCLP test followed by removal of 0.3m to 2.3m to landfill. Immobilisation if TCLP tests exceed criteria **.	200 to be removed to landfill @	Yes, determine extent of HM (As, Cu, Pb, Hg, Cd and Zn) PAH and TPH contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB21	Yes	Concrete down to 0.5m	0.5m to 5.0m	TCLP test followed by removal of 0.5m to 3.5m to landfill. Immobilisation if TCLP tests exceed criteria *. Remaining depth to be immobilised to 5m	300 to be removed to landfill + 150 @	Yes, determine extent of HM (Cu, Pb, Hg and Zn) and TPH contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB22	Yes	Concrete down to 0.5m	0.5 to 1.5m	Immobilisation *	100	Yes, determine extent of HM (Pb) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB23	Yes	Concrete down to 0.5m	0.5 to 4m	Immobilisation*	350	Yes, determine extent of HM (Pb) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB24	Yes	Concrete down to 1.2m	1.2 to 4.2m	Immobilisation*	300	Yes, determine extent of HM (Cu, Pb and Hg) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB25	Yes	Concrete down to 0.9m. Down to 1.0m	Depth 1.0m – 4.4m	TCLP test followed by removal of 1.0m to 2.9m to landfill. Immobilisation if TCLP tests exceed criteria *. Immobilisation for remaining 2.9m to 4.4m	100 to be removed to landfill + 240 @	Yes, to determine extent of HM (Pb, Hg) and PAH contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB26	Yes	Concrete down to 0.8m	Depth 0.8m – 3.0m	TCLP test followed by removal of 0.8m to 3.0m to landfill. Immobilisation if TCLP tests exceed criteria **.	220 to be removed to landfill.@	Yes, to determine extent of HM (Pb, Cu, Zn, Hg) and TPH contamination.*	5 samples 5m N, S, E & W and base of borehole.
TB27	Yes	Concrete down to 0.5m and clean soil down to 2.0m	2.0 to 4.0m	TCLP test followed by removal of 2.0m to 4.0m to landfill. Immobilisation if TCLP tests exceed criteria **.	200	Yes, determine extent of HM (Cu and Pb) and PAH contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB28	Yes	Concrete down to 0.4m	0.4 to 4.4m	Immobilisation*	400	Yes, determine extent of HM (As, Cd, Cu, Pb, and Zn) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB29	Yes	Concrete down to 0.5m	0.5 to 3.5m	Immobilisation*	300	Yes, determine extent of HM (Cu, Pb, Hg and Zn) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
TB30	Yes	Concrete down to 0.6m	0.6 to 1.6m	Immobilisation*	100	Yes, determine extent of HM (Pb) contamination at edge and base of excavated hole.*	5 samples 5m N, S, E & W and base of borehole.
Refuse Bunkers	Yes	N/A	N/A	Landfill disposal *	To be determined after inspection of bunkers	Examine bunker refuse prior to demolition.	Consider analysis depending on bunker contents.

* If contamination confirmed by reassurance sampling extract a further 1m into the soil, immobilise and resample.

** TCLP test for all metals identified in Table E1 in EPD Contaminated Sites Investigation and Remediation Guidance Notes

# Broad brush estimate based on depths to which materials >Dutch B are identified by current round of sampling and all material within 5m (10m x 10m square hole) to that depth (rounded up to nearest 10m³. (Total 6055 m^3.requiring confirmation). According to the quantity of contaminated material estimated for each borehole location, the total quantity of contaminated soil should be about 6055m³. About 4635m^3.of the total volume is estimated to require treatment on site by immobilisation.

@ Broad brush estimate of materials to be transferred to landfill rounded up to nearest 10m³about 1,420m³, requiring confirmation).

7. Site Environmental Audit

7.1 Site Inspections

7.1.1 Site Inspections provide a direct means to trigger and enforce the specified environmental protection and pollution control measures. Pollution control measures shall be undertaken routinely and results catalogued in a site diary to facilitate inspection of the construction activities in order to ensure that appropriate environmental protection and pollution control mitigation measures are properly implemented. With well defined pollution control and mitigation specifications and a well established site inspection, deficiency and action reporting system, the site inspection is one of the most effective tools to enforce the environmental protection requirements on the construction site.

7.1.2 The ETL is responsible for formulation of the environmental site inspection, deficiency and action reporting system, and for carrying out the site inspection works. He shall submit a proposal on the site inspection, deficiency and action reporting procedures within 21 days of the construction contract commencement to the Contractor for agreement and to the ER for approval.

7.1.3 Regular site inspections shall be carried out at least once per week. The areas of inspection shall not be limited to the environmental situation, pollution control and mitigation measures within the site. They should also review the environmental situations outside the Site that are likely to be affected, directly or indirectly, by the site activities. The ETL shall make reference to the following information in conducting the inspections:

· the EIA Report recommendations on environmental protection and pollution control mitigation measures;

· works progress and programme;

· individual works methodology proposals (which shall include proposals on associated pollution control measures);

· the contract specifications on environmental protection;

· the relevant environmental protection and pollution control laws; and

· previous site inspection results.

7.1.4 The ETL shall request all information regarding the construction contract from the Contractor required for him to carry out the site inspections. The inspection results and their associated recommendations on improvements to the environmental protection and pollution control works shall be submitted to the ER and the Contractor within 24 hours, for reference and for taking immediate action. The Contractor shall follow the procedures and time-frame as stipulated in the environmental site inspection, deficiency and action reporting system formulated by the ETL to report on any remedial measures subsequent to the site inspections.

7.1.5 Ad hoc site inspections shall also be carried out if significant environmental problems are identified. Inspections may also be required subsequent to receipt of an environmental complaint, or as part of the investigation work, as specified in the Action Plan for environmental monitoring and audit.

7.2 Compliance with Legal and Contractual Requirements

7.2.1 The demolition activities shall comply with all contractual environmental protection and pollution control requirements as well as environmental protection and pollution control laws in Hong Kong.

7.2.2 In order that the works are in compliance with the contractual requirements, all the works method statements submitted by the Contractor to the ER for approval shall be sent to the ETL for vetting to see whether sufficient environmental protection and pollution control measures have been included.

7.2.3 The ETL shall also review the progress and programme of the works to check that relevant environmental laws have not been violated, and that any foreseeable potential for violating the laws can be prevented.

7.2.4 The ETL shall regularly request copies of relevant documents from the Contractor so that the checking work can be carried out. The documents shall at least include the updated Work Progress Reports, the updated Works Programme, the application letters for different licenses/permits under the environmental protection laws, and all the valid licenses/permits. The site diary shall also be available for the ETL’s inspection upon his request.

7.2.5 After reviewing the document, the ETL shall advise the ER and the Contractor of any non-compliance with the contractual and legislative requirements on environmental protection and pollution control for them to take follow-up actions. If the ETL’s review concludes that the current status on license/permit applications and any environmental protection and pollution control preparation works may not cope with the works programme he shall also advise the Contractor and the ER accordingly. If the ETL’s review concludes that the current status may result in potential violation of environmental protection and pollution control requirements by the works in due course, he shall also advise the Contractor and the ER accordingly.

7.2.6 Upon receipt of the advice, the ER shall follow up to ensure that appropriate action has been taken by the Contractor in order to ensure that the environmental protection and pollution control requirements are fulfilled.

7.3 Environmental Complaints

7.3.1 Complaints shall be referred to the ETL for carrying out complaint investigation procedures. The ETL shall undertake the following procedures upon receipt of any complaints:

· log complaint and date of receipt onto the complaint database;

· investigate the complaint to determine its validity, and to assess whether the source of the problem is due to works activities;

· if a complaint is valid and due to works, identify mitigation measures;

· if mitigation measures are required, advise the Contractor accordingly;

· review the Contractor’s response on the identified mitigation measures, and the updated situation;

· if the complaint is submitted by EPD, submit interim report to EPD on status of the complaint investigation and follow-up action within the time frame agreed between the ER and relevant Government Departments;

· undertake additional monitoring and audit to verify the situation if necessary, and review that any valid reason for complaint does not recur;

· report the investigation results and the subsequent actions to the source of the complaint for responding to the complainant (if the source of complaint is EPD, the results should be reported within the time frame agreed with the ER and relevant Government Departments); and;

· record the complaint, investigation, the subsequent actions and the results in the monthly EM&A reports.

7.3.2 During the complaint investigation work, the Contractor shall provide all the necessary information and assistance for completion of the investigation. If mitigation measures are identified in the investigation, the ER shall advise the Contractor to promptly carry out the mitigation (the ER will have the authority to require that the measures are carried out). The ET shall inspect measures that have been carried out by the Contractor and advise ER of their acceptability.

Table 7.1 Event Contingency Plan for Environmental Complaints

Step	Day	Action	Contractor	ER	ET	IC(E)
1	1	Party receiving complaint shall create a new complaint record. If the Contractor receives a complaint, he shall pass the information to the ER.	¨	¨	¨
2	1	ER to ensure details of complaint provided to Contractor (if complaint not originally received by the Contractor), ET and IC(E)		¨
3	2	Within 1 working day after the receipt of the Notification of Complaint, provide ER relevant works site information, e.g. types and locations of construction works.	¨			à
4	2	Investigate the complaint to determine its validity, and to assess whether the source of the problem is due to the works activities. Report the validity of the complaint to ER.				¨à
5	2	If complaint is valid and due to works, ER shall notify the Contractor. If complaint is invalid or not due to works, Go to Step 12.		¨
6	2	Propose mitigation measures to ER within 1 working day of the receipt of the Notification.	¨			à
7	2	Review and agree with the proposed mitigation measures and make recommendations where necessary.		¨à		¨à
8	2	Implement the mitigation measures once they have been agreed.	¨
9	4	Audit the implementation of the proposed mitigation measures on site within 2 working days after measures have been agreed.		¨à		¨à
10	-	Undertake additional monitoring to verify the situation where necessary.			¨
11	4	Report the investigation results and subsequent actions taken to ER within 2 working days after the implementation of mitigation measures.	¨		¨
12	5	Respond to the complainant within 1 working day after receiving the investigation report.		¨
13	25	If no further comments or complaints are received from the complainant within 20 working days after responding to the complainant, close the complaint record. If the complainant has further comments or complaints on the same issue, notify other parties on the same day and go to step 2.		¨		¨à

¨ action party

à enter comments/proposals into appropriate complaint record where applicable

8. REPORTING

8.1 General

8.1.1 The following reporting requirements are based upon a paper documented approach. However, the same information can be provided in an electronic medium upon agreeing the format with the ER and relevant Government Departments. This would enable a transition from a paper/historic and reactive approach to an electronic/real time proactive approach.

8.2 Baseline Monitoring Report

8.2.1 The ETL shall prepare and submit a Baseline Environmental Monitoring Report within 10 working days of completion of the baseline monitoring. Copies of the Baseline Environmental Monitoring Report shall be submitted to the project proponent, the Contractor, the ER and the EPD. The ETL shall liaise with the relevant parties on the exact number of copies required.

8.2.2 The baseline monitoring report shall include at least the following:

· a 1-2 page executive summary;

· brief project background information;

· drawings showing locations of the baseline monitoring station;

· monitoring results (in both hard and diskette copies) together with the following information:

- monitoring methodology;

- equipment used and calibration details;

- parameters monitored;

- monitoring locations; and

- monitoring date, time, frequency and duration.

· details on influencing factors, including:

- major activities, if any, being carried out on the site during the period;

- weather conditions during the period; and

- other factors which might affect the results.

· determination of the Action and Limit Levels for each monitoring parameter and statistical analysis of the baseline data;

· revisions for inclusion in the EM&A Manual; and

· comments and conclusions.

8.3 Monthly EM&A Reports

8.3.1 The ETL shall undertake all reporting which shall be reviewed by the ER to determine that the reporting has been carried out in accordance with the requirements of the Manual.

8.3.2 The results and findings of all EM&A work required in the Manual shall be recorded in the monthly EM&A Reports. The EM&A Report shall be prepared and submitted within 10 working days of the end of each reporting month, with the first report due in the month after construction commences. A copy of each monthly EM&A Report shall be submitted to the project proponent, the Contractor, the ER and the EPD. Before submission of the first EM&A Report, the report producer shall liaise with the parties on the exact number of copies and format of the monthly reports in both hard copy and electronic medium requirement. The monthly EM&A reports shall continue through to the end of the soil remediation works phase

8.3.3 The first monthly report shall include at least the following :

· 1-2 pages executive summary;

· basic project information including a synopsis of the project organisation, programme and management structure, and the work undertaken during the month;

· a brief summary of EM&A requirement including :

- all monitoring parameters;

- environmental quality performance limits (Action and Limit levels);

- Event-Action Plans;

- environmental mitigation measures, as recommended in the project EIA study final report;

- environmental requirements in contract documents;

· advice on the implementation status of environmental protection and pollution control/mitigation measures, as recommended in the project EIA study report, summarised in the updated implementation schedule;

· drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;

· monitoring results (in both hard and diskette copies) together with the following information:

· monitoring methodology;

· equipment used and calibration details

· parameters monitored

· monitoring locations

· monitoring date, time, frequency, and duration;

· major activities being carried out on site during the period;

· weather conditions during the period; and

· any other factors which might affect the monitoring results;

· advice on the solid and liquid waste management status;

· a summary of non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);

· a review of the reasons for and the implications of non-compliance and deficiency reporting and any follow-up procedures;

· a description of the actions taken in the event of non-compliance and deficiency reporting and any follow-up procedures related to earlier non-compliance;

· a summary record of all complaints received (written or verbal) for each media, including locations and nature of complaints, liaison and consultation undertaken, actions and follow-up procedures taken and summary of complaints; and

· an account of the future key issues as reviewed form the works programme and work method statements.

8.3.4 The subsequent monthly EM&A reports shall include the following :

· title page;

· Executive Summary (1-2 pages);

- breaches of AL levels ;

- complaint Log;

- reporting Changes; and

- future key issues.

· contents page;

· environmental status;

- drawing showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;

- summary of non-compliance with the environmental quality performance limits; and

- summary of complaints.

· environmental issues and actions;

- review issues carried forward and any follow-up procedures related to earlier non-compliance (complaints and deficiencies);

- description of the actions taken in the event of non-compliance and deficiency reporting;

- recommendations (should be specific and target the appropriate party for action); and

- implementation status of the mitigation measures and the corresponding effectiveness of the measures.

· future key issues;

· appendices;

- AL levels

- graphical plots of trends of monitored parameters at key stations over the past four reporting periods for representative monitoring stations annotated against the following:

i. major activities being carried out site during the period;

ii. weather conditions during the period; and

iii. any other factors which might affect the monitoring results.

- monitoring schedule for the present and next reporting periods;

- cumulative complaints statistics; and

- details of complaints, outstanding issues and deficiencies.

8.4 Contamination Remediation Report

8.4.1 Following the remediation stage, a Final Remediation Report is required for submission to EPD. The Purpose of this Report is to confirm that ground remediation works have been satisfactorily completed. The scope, content and format of this Report shall follow those requirements set out in the Contract for the remediation works in question which shall themselves comply with the provisions of any pertinent environmental permit.

8.5 Data Keeping

8.5.1 Site documents such as the monitoring field records, laboratory analysis records, site inspection forms, etc. are not required to be included in the Monthly EM&A Report for submission. However, the documents shall be kept by the ETL and be ready for inspection upon request. All relevant information shall be clearly and systematically recorded in the document. The monitoring data shall also be recorded in magnetic media form, such that the electronic copy can be made available upon request. The documents and data which shall be kept for at least one year after completion of the construction contract will include the following:

· all reports issued;

· site inspection forms and reports;

· monitoring field and laboratory records;

· complaints and related follow-up action information; and

· revised mitigation measures proposals adopted during the course of the works programme.

8.6 Interim Notifications of Environmental Quality Limit Exceedances

8.6.1 With reference to Event/Action Plans, when the environmental quality limits are exceeded, the ETL shall immediately notify the ER and relevant Government Departments, as appropriate. The notification shall be followed up with advice to EPD on the results of the investigation, proposed action and success of the action taken, with any necessary follow-up proposals. A sample template for the interim notifications is shown in Table 8.1.

Table 8.1 Sample Template for Interim Notifications of Environmental Quality Limits Exceedances

Project
Date
Time
Monitoring Location
Parameter
Action & Limit Levels
Measured Level
Possible reason for Action or Limit Level Non-compliance
Actions taken / to be taken
Remarks

				Location Plan
Prepared by :
Designation :
Signature :
Date :

9. Schedule Mitigation Measures from the eia

Table 9.1 Schedule of Impacts and Mitigation Measures

No.	Activity	Mitigation/EIA Recommendations	Respons-ibility for Implemen-tation	Location Duration completion Of measures	Implemen-tation Stage	Relevant Guidelines Legislation
1	Ash Disposal
I	Treatment	Reconfirm extent of contaminated ash deposits by sampling for dioxins and furans. Handling, transportation and disposal of the ash waste in line with relevant regulations. Collection, immobilisation and testing of waste for disposal to landfill shall be carried out according to the relevant regulations and recommendations of the EIA including immobilisation by collection and mixing the ash material with cement. Pilot mixing and TCLP tests should establish the ratio of cement to ash to the satisfaction of EPD. Ash waste to be treated and placed into steel drums lined with plastic sheeting. The drums should be adequately sealed and in new or good condition. Prior agreement of the disposal criteria from EPD and agreement to disposal from the landfill operator must be obtained.	CED’s Contractor	KTCDA work areas. Duration of the ash removal	A@	1, 10, EIA
II	Disposal	To monitor the disposal of waste at landfills, a “trip-ticket” system (WBTC No. 5/99) for all solid waste transfer/disposal operations should be implemented. The system should be included as a contractual requirement, and monitored by the Environmental Team and audited by the Independent Checker (Environment).	CED’s Contractor	As above	A	1, 5, 9
III	Asbestos Removal	An asbestos abatement programme should be submitted to EPD for approval prior to the commencement of the asbestos abatement work.	CED and Contractor	As above	A	4
2	Demolition
A	Non-blasting Methodology	Waste Management Plan to be submitted to EPD. Demolition by Non-Blasting Methodology Only. All structures and buildings should be demolished and removed prior to demolition of chimneys	CED	KTCDA work areas. Duration of the demolition	C#	8
B	Material Storage	Covers for dusty stockpiles and control of dust emissions from construction (demolition) works requires appropriate dust control measures to be implemented in accordance with the requirements in the Air Pollution Control (Construction Dust) Regulation.	CED’s Contractor	As above	C	4
C	Vehicle movement	Haul road watering, vehicle wheel wash prior to exit. Where practical, access roads should be protected with crushed gravel.	CED’s Contractor	As above	C	4
D	Plant maintenance	All plant shall be maintained to prevent any undue air emissions.	CED’s Contractor	As above	Prior to start of works	4
E	Improved Site Hoarding	Boundary hoarding to be modified in form of noise barrier to provide effective noise screening and made of panels with a superficial surface density of at least 10 kg/m³	CED’s Contract`or	As above	C	Env. Permit
F	Demolition Sequence	Include careful consideration and positioning of portable noise barriers to allow noise attenuation.	CED’s Contractor	As above	C	8
G	Portable Noise Barriers	Moveable noise barriers shall be provided close to PME in cases where, in the opinion of the Engineer, such PME has the potential to cause noise nuisance to sensitive receivers and where a benefit will result. Such barriers shall be made of panels with superficial surface density not less than 10 kg/m³.	CED’s Contractor	As above	C	Env. Permit
H	Plant Operation	Modify continuous operational periods for noisy plant to comply with noise criteria.	CED’s Contractor	As above	C	Env Permit
I	Demolition Techniques	Selection of non-blasting demolition techniques to minimise noise and vibration.	CED’s Contractor	As above	C	8
J	Plant maintenance	All plant shall be maintained to prevent any undue noise nuisance.	CED’s Contractor	As above	C	2, 3
K	Wheel wash	All wheel wash water shall be diverted to a sediment pit.	CED’s Contractor	As above	C	5
L	Sediment control	Sediment removal facilities shall provided and be maintained and excavated as necessary to prevent sedimentation of channels. Perimeter channels should be provided. Works should be programmed for the dry season where feasible. Environmental guidelines for the handling and disposal of discharges from construction sites, as stipulated in the Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94) to be followed.	CED’s Contractor	As above	C	5, 12
M	Surface water diversion	All clean surface water shall be diverted around the site.	CED’s Contractor	As above	C	5, 12
N	Fuel can storage	All fuel cans shall be placed within a bunded area. Any fuel spills shall be mopped up as necessary.	CED’s Contractor	As above	C	5,6
O	Material, plant move-ment & fuel can filling.	Any fuel or oil spills shall be excavated and disposed of.	CED’s Contractor	As above	C	6,7
P	Generators	All generators shall be placed within a bunded area. Any fuel spills shall be mopped up as necessary.	CED’s Contractor	As above	C	5,6,7
Q	Material containers	All empty bags and containers shall be collected for disposal.	CED’s Contractor	As above	C	6,7
R	Worker generated litter and Waste	Litter receptacles shall be placed around the site. Litter shall be taken regularly to the refuse collection points. Chemical toilets (or suitable equivalent) should be provided for workers. Any canteens should have grease traps.	CED’s Contractor	As above	C	6
S	Neighbourhood nuisance	All complaints regarding construction works shall be relayed to the environmental team.	CED’s Contractor	As above	C	1, 6
T	Legal requirements	Different types of waste should be segregated, stored, transported and disposed of in accordance with the relevant legislative requirements and guidelines	CED’s Contractor	As above	C	1,6
U	On-site separation	On-site separation of municipal solid waste and construction/demolition wastes shall be conducted in order to minimise the amount of solid waste to be disposed to landfill.	CED’s Contractor	As above	C	1, 11
V	Temporary storage area	Separated wastes should be stored in different containers, skips, or stockpiles to enhance reuse or recycling of materials and encourage their proper disposal.	CED’s Contractor	As above	C	1, 11
W	Record of wastes	Records of quantities of wastes generated, recycled and disposed (with locations) shall be kept.	CED’s Contractor	As above	C	1, 9
X	Trip-ticket system	To monitor the disposal of waste at landfills and control fly-tipping, a “trip-ticket” system under WBTC N0.5/99 for all solid waste transfer/disposal operations should be implemented. The system should be included as a contractual requirement, and monitored by the Environmental Team and audited by the Independent Checker (Environment).	CED’s Contractor	As above	C	1, 9

3	Soil Remediation Phase
AA	B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T U, V, W and X as above	As above (see W for soil remediation).	CED’s Contractor	KTCDA work areas. Duration of the soil remediation	R	As above
BB	De-watering	Collect and recycle extracted groundwater and leachate by mixing with cement for soil remediation. Environmental guidelines for the handling and disposal of discharges from construction sites, as stipulated in the Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94) to be followed. Any surplus groundwate and leachate requiring disposal to be disposed of under the relevant legislation or treated to meet the standards given in Table 9a of the WPCO TM and any other parameters to be agreed with EPD prior to any consent being given to discharge.	CED’s Contractor	As above		5
CC	Immobilisation	Immobilisation and testing of waste soil shall be carried out according to the relevant regulations and recommendations of the EIA including immobilisation by collection and mixing the contaminated soil material with cement. Pilot mixing and TCLP tests should verify the effectiveness and establish the ratio of cement to soil to the satisfaction of EPD. Such activities shall take place in a covered area with a concrete paved floor. Reassurance confirmatory sampling shall be carried out to confirm the extent of contamination. Soil waste to be cast in blocks and replaced in the ground. Extracted soils and materials and stabilisation/solidification to be conducted in bunded area to prevent surface run-off. See also item 2(H) above. Final soil decontamination report to be submitted to EPD.	CED’s Contractor	As above		1, 10
4	Monitoring and Audit	To be carried out in accordance with the Schedule in the EM&A Manual.	CED*/ Contractor/ RSS	KTCDA works areas During demolition and at end of demolition throughout execution of Remediation Action Plan	C	1

* Normally undertaken by a specialist monitoring team employed directly by the proponent and audited by the Independent Checker(Environment)

@ A = during ash removal (before demolition)

# C = during construction (i.e. demolition phase).

* R = during soil remediation phase (after demolition)

1. Environmental Impact Assessment Ordinance Technical Memorandum (EIAO)

2. Noise Control Ordinance

3. The ProPECC Note PN2/93 (Construction Noise daytime limits)

4. Air Pollution Control Ordinance (APCO)

5. Water Pollution Control Ordinance (WPCO)(Cap. 358)

6. Waste Disposal Ordinance (Cap 354)

7. Waste Disposal (Chemical Waste)(General) Regulation (Cap 354)

8. Draft Code of Practice on Demolition of Buildings (BD, 1998)

9. Works Bureau Technical Circular No. 5/99, Trip-ticket System for Disposal of Construction and Demolition Material

10. Guidance Notes for Investigation and Remediation of Contaminated Sites

11. Works Bureau Technical Circular No. 5/98, On Site Sorting of Construction Waste on Demolition Sites

12. ProPECC Note PN 1/94Construction Site Drainage

A1. Introduction

A1.1 Background

A1.1.1 The Civil Engineering Department (CED) has appointed Atkins China Ltd. (ACL) to undertake the Environmental Impact Assessment (EIA) for the Demolition of the Kwai Chung Incineration Plant and the Kennedy Town Comprehensive Development Area (Agreement No. CE 15/99). The Kennedy Town Incineration Plant (KTIP) is within the boundary of the KTCDA and ceased to operate March 1993 and has been decommissioned and the facilities require demolition. The demolition of the remaining facilities constitutes the Project as defined under the requirements of the Environmental Impact Assessment Ordinance (EIAO).

A1.1.2 The primary aim of this paper is to establish a conceptual demolition method and to define the major constraints that must be considered in the final demolition process. The paper presents information that facilitated decisions on acceptable conceptual demolition methods for both Project as a basis for the remainder of the Study.

A1.1.3 To satisfy the requirements of the EIA it is necessary to define clearly the nature of the works involved in the demolition process. The development of a conceptual scheme for the demolition process in turn requires detailed analysis of the facilities and those surrounding uses and activities which might influence decisions on demolition. This paper presents this analysis. The conceptual scheme for demolition of the facilities has been developed based on practical experience and current demolition practice in Hong Kong as well as internationally.

A1.1.4 A description of the elements of the community and environment, likely to be affected by the proposed demolition activities is provided to ensure that any potential constraints on demolition works due to the need to protect sensitive receivers, surrounding infrastructure or facilities are considered. Such requirements may constrain the way the proposed Project is executed and affect the methods that can be used so as to influence the choice of demolition methods.

A1.2 Structure of the Report

A1.2.1 In addition to this introduction Working Paper 1 Report includes sections covering the following:

· Section 2 Project and Study Area

· Section 3 Appreciation and Understanding of Constraints to Demolition.

· Section 3 General Approach to Demolition of Buildings and Structures.

· Section 4 Conceptual Demolition Method for Chimneys at KTCDA.

· Section 5 Conclusions.

A2. Project and Study Area

A2.1 Kennedy Town Comprehensive Development Area (KTCDA)

A2.1.1 The proposed Kennedy Town Comprehensive Development Area (KTCDA) is situated next to Victoria Road and Cadogan Street, Kennedy Town, and adjacent to Victoria Harbour, with a site area of about 34,000 square metres.

A2.1.2 The KTCDA comprises several elements as well as the Kennedy Town Incineration Plant (KTIP). The main operations at the Kennedy Town Abattoir (KTA) ceased and relocated to new facilities at Sheung Shui in the autumn of 1999. The KTA includes an incinerator for disposal of animal carcasses and waste that is managed by EPD. The KTA plant remains in place.

A2.1.3 Part of the former EMSD Depot that forms part of the KTCDA has been leased to New World First Bus (NWFB) for bus maintenance and refuelling, under a short-term tenancy. The remainder is leased as a car / lorry park. These facilities will remain in operation for the time being.

A2.1.4 The former Kennedy Town Wholesale Market has been relocated and this area has been remodelled as a park and sitting out area adjacent to Victoria Road. This is known as the Cadogan Street Temporary Garden (CSTG).

A2.1.5 Food and Environmental Hygiene Department have recently constructed a Refuse Collection Point (RCP) between the park and the Abattoir at Sai See Street.

A2.1.6 The KTCDA includes:

· the Kennedy Town Incineration Plant (KTIP);

· the Kennedy Town Abattoir (KTA);

· the New World First Bus Depot (NWFB);

· car / lorry park (CP);

· FEHD Refuse Collection Point (RCP); and

· the Cadogan St Temporary Garden (CSTG).

A2.1.7 The structures to be demolished are summarised in Table A2.1.

A2.1.8 The KTCDA was recommended for future private housing development in the “Planning and Engineering Study for the Redevelopment of Mount Davis Cottage Area and Kennedy Town Police Married Quarters” (Agreement No. CE 52/97), completed in May1999. The Open Space and Refuse Collection Point were proposed to be permanently relocated within the redevelopment.

A2.1.9 The proposed Green Island Reclamation and Route 7 (R7), a strategic road link between Kennedy Town and Aberdeen, are located just to the north of the KTCDA site although the exact alignment of R7 is not yet confirmed. A further planning and engineering study to address some major issues, including the Green Island Development and alternative road alignments of Route 7, is currently being considered by the government. The findings from this further study may alter the future land use of the KTCDA.

Table A2.1 Structures to be demolished at KTCDA

Building	Brief Description
KTIP Chimneys	Two reinforced concrete chimneys, 60m high, 3.5m in diameter.
KTIP Building	Reinforced concrete structure of approximately 3,025m² on plan, Refuse Pier
Kennedy Town Abattoir	5-storey reinforced concrete structures of approximately 9,500m² on plan, Reception Pier
Former EMSD Building	Boiler House and Animal Carcass Incinerator Building. One reinforced concrete chimney, 25m high, 3m in diameter.
New World First Bus Depot	Offices and Vehicle Inspection Bays. Overall size is approximately 600m² on plan.
Hong Kong Electric Sub Station	Single Storey Transformer House (adjacent to KTA lairage)
Cadogan Street Temporary Garden	(Inclusion / Exclusion / Programme Requires Decision.)
Sai See Street Refuse Collection Point	(Inclusion / Exclusion / Programme Requires Decision.)

A3. Appreciation and Understanding of Constraints to Demolition

A3.1 Background

A3.1.1 This section identifies the sensitive receives (SRs) affected by the Project as defined in the EIAO and discusses the implications of these and other nearby sensitive engineering projects and infrastructure with respect to the constraints they will place on demolition methods. Where relevant we have also noted the implications such sensitive locations may have on the potential for explosive demolition.

A3.1.2 It has been assumed that the demolition for KTCDA will take place as soon as possible in order to allow future developments on and near the site. The earliest start date will be in 2002 with demolition works lasting about one year.

A3.2 Sensitive Receivers at KTCDA

Residential, Government, Institutional and Community

A3.2.1 Residential, Government, Institutional and Community uses surround the KTCDA site and many are elevated and overlook the site. The nearest rank of sensitive receivers is discussed below.

· Kennedy Town Police Married Quarters currently overlooks the site. The premises are scheduled to be vacated but parts of the buildings will potentially be occupied up to March 2002.

· The Mount Davis Cottage Area has already been partially vacated and the remaining premises will be vacated up to March 2001.

· The new Housing Society development at Ka Wai Man Road is scheduled for occupation by mid 2000.

· There are occupied residential building at Cadogan Street including Centenary Mansion.

A3.2.2 Other premises in the low rise blocks at Cadogan Street are scheduled for demolition in preparation for the Land Development Corporation’s urban renewal project. Whereas many of the ground floor commercial premises remain in operation temporarily, the residential units above have been vacated or are scheduled to be vacated by the time demolition of KTCDA takes place.

A3.2.3 Manhattan Heights high rise development at Kennedy Town New Praya overlooks the site. Residential units will be occupied by the time demolition of KTCDA takes place.

A3.2.4 There are Government, Institutional and Community uses at St Lukes Church School, St Lukes Settlement, Jockey Club Clinic, Victoria Mortuary and the Bayanihan Centre.

A3.2.5 St Lukes Church School on Ka Wai Man Road and the, St Lukes Settlement and Jockey Club Clinic will remain in operation at the time of demolition for KTCDA.

A3.2.6 The Bayanihan Centre on Victoria Road is a training and support facility for Philippine overseas workers which is open seven days per week and it is assumed this will remain in operation at the time demolition of KTCDA takes place.

A3.3 Implications of Demolition by Implosion at KTCDA

A3.3.1 Non-explosive demolition methods used the EIA will lead to the recommendation recommend of a series of mitigation measures to protect the residential, government, institutional and community uses and all other sensitive receivers that surround the KTCDA.

A3.3.2 If explosive demolition methods were to be used, the EIA would include a comprehensive Risk Assessment Report covering the effects of the affected neighbourhood would be required. The assessment would be undertaken within this Study and one of the results would be to recommend risk reduction measures to ensure that explosive demolition would be carried out within the Hong Kong Risk Guidelines. These requirements would be included in the Environmental Permit.

A3.3.3 One such likely requirement is the inclusion of an exclusion zone to minimise the chance of ejecta or debris hitting any spectators. Whereas the exclusion zone cannot be determined at this stage, it is possible to identify the likely size of such a zone by reference to other studies. Recent requirements for the minimisation of risks from ejecta, included in the Environmental Permit (EP-002/1998) for the Felling of Five Power Station Chimneys at Tsing Yi Power Station Chimneys by explosion, included an exclusion zone equivalent to three times the chimney heights.

A3.3.4 The “Draft Code of Practice for Demolition of Buildings (Buildings Department) requires that all residents or inhabitants within an exclusion zone be evacuated during blasting. The radius of a typical exclusion zone is not less than 2.5 times the height of the structure to be demolished. The highest structures at the KTCDA are the KTIP chimneys at 60m. Experience therefore suggests that an exclusion zone of two and a half (150m) to three times (180m) the height of the structures to be demolished would be required at the KTCDA. The possible limits of exclusion with respect to the chimneys at KTCDA are shown on Figure 2.1.

A3.3.5 The PPFS for the demolition of KTCDA noted that, due the short distance between Chimney “A” and other buildings to the west, it would be a high risk option to demolish using explosives. The PPFS also noted that the possibility of demolition of Chimneys B and C using explosives could not be ruled out at that stage. However the PPFS did not make reference to any other buildings in the vicinity. The Kennedy Town Police Married Quarters, St Lukes Settlement, Jockey Club Clinic, Victoria Mortuary, Bayanihan Centre, St Lukes Church School, Hosing Society Residential Development, Cadogan Street Temporary Garden, China Merchants Wharf, Industrial Buildings in Victoria Road and Public Piers at Cadogan Street would all be within a 2.5 times exclusion zone for evacuation for Chimney “B”.

A3.3.6 The PPFS report also notes that the Cadogan Street Temporary Garden (GLA-THK 10550), RCP (GLA-THK 1054) and the New World First Bus Depot are subject to leases requiring one month notice for termination. The FEHD RCP at Sai See Street is subject to a lease requiring three months notice for termination. The reprovision of the Cadogan Street Temporary Garden and the Temporary RCP have been planned to be within the Kennedy Town CDA redevelopment. The location for an alternative site for the New World First Bus Depot has been proposed to lie within the Green Island Development. In the event that these locations cannot be closed for operational reasons, they may also have to be temporarily closed or evacuated during demolition by implosion, if they are not already handed back to Government by the time of demolition.

A3.3.7 USD have indicated that there is no programme identified to relocate the newly developed RCP and CSTG. Whereas these sites would require protection during the demolition, regardless of the demolition method, there would be more opportunity for a flexible approach to the phasing of demolition if non-blasting methods are used and exclusion zones are not required.

A3.3.8 The New World First Bus Depot also includes diesel fuel storage tanks and other lubrication oil storage. Experience also suggests that such tanks in reasonably close proximity to demolitions by implosion would be required to be emptied and sterilised for the duration of the felling by implosion in order to reduce risk.

A3.4 Other Sensitivities near KTCDA

Road Traffic

A3.4.1 Road traffic access must be maintained for residential and commercial uses at Kennedy Town. There are general concerns about the potential impact of traffic to and from the demolition site on the local network.

A3.4.2 Access must be maintained for commercial uses at China Merchants Wharf and Godowns, the Kennedy Town public transport terminus Victoria Public Mortuary, industrial buildings, residences on Victoria Road, the petrol station on Victoria Road and the Island West Refuse Transfer Station.

A3.4.3 Whereas the exact volume of waste to be disposed of has not yet been determined, preliminary estimates indicate that about forty lorries per day would be required. Therefore it is estimated that during the peak of demolition process fewer than ten heavy vehicles per hour would be required to remove waste from the Site. Traffic Impact Assessments carried out for the “Planning and Engineering Study for the Redevelopment of Mount Davis Cottage Area and Kennedy Town Police Married Quarters” (Agreement No. CE 52/97) indicate that this level of additional traffic could be absorbed into the surrounding network without significant impacts.

A3.4.4 In addition the impact of potential road closures needed to allow blasting techniques, such an approach would require additional studies which are outside of the Brief and may delay the EIA programme. Transport Department have indicated a general presumption that a road closure would be unacceptable unless it can be proven that traffic impacts can be mitigated to acceptable levels. A full traffic impact assessment (TIA) would be required to assess impacts on all roads in the exclusion zone and the public transport system and a feasible traffic diversion scheme would need to be developed. Emergency plans would also be required.

Marine Traffic

A3.4.5 Access must be maintained for vessels accessing the pier at China Merchants Wharf and Cadogan Street and interference to the Victoria Harbour marine traffic must be minimised. Although local assessments indicate that additional waste disposal vehicles could be absorbed into the surrounding road network, it has been suggested that barges could be used to remove waste in order to reduce overall road traffic impacts. Such a proposal may also require a Marine Traffic Impact Assessments (MTIA).

A3.4.6 The exclusion zone for blasting would also be applied to marine vessels in the area and together with the requirement to evacuate the China Merchants Wharf and Godown, this may require compensation to the operators and the hidden cost organising and patrolling such an evacuation in the busy harbour.

Weather

A3.4.7 The KTCDA is close to the slopes of Mt. Davis which have been prone to landslides in the past. Blasting restrictions may be necessary and initiation of blasts may need to be prevented following periods of heavy rain as this may increase the likelihood and effect distance of landsides. Likewise blasting demolition would not be allowed in periods of high or gusting winds to avoid the possibility of chimneys falling in unplanned directions or at an unplanned time. Both considerations introduce uncertainty to the programme but in particular add to the difficulties in co-ordination of evacuation of the exclusion zone.

Other Issues

A3.4.8 The revised alignment for Route 7 and extent of the Green Island Developments are currently under review but at present the programme of these developments is unlikely to be advanced before 2002 and after the target completion date for demolition of KTCDA. These development proposals should therefore have no impact on the Project.

A3.5 Implications of the Presence of Asbestos Containing Materials

A3.5.1 An Asbestos Investigation Report (AIR) and Asbestos Abatement Plan are required under the Air Pollution Control Ordinance (APCO) prior to the commencement of any asbestos abatement work. Reports and plans prepared by Registered Asbestos Consultants (EPD register RACs 1014 and 1019) indicate asbestos containing materials (ACM) are present at the Site.

A3.5.2 The Brief assumes that any asbestos containing materials (ACM) present in the chimneys and superstructures within the two sites will be removed before commencement of the demolition works. However, experience suggests that in practice the asbestos abatement processes will run more smoothly if both asbestos contractors and civil demolition contractors work in tandem, as has been the case with the civil demolition of the remaining buildings and structures at other large industrial locations in Hong Kong. This is generally due to the convenience of the main civil demolition contractors providing access (scaffolding etc.) to the ACM, for the asbestos contractor. In other cases it may be necessary for the civil demolition contractor to remove large sections of materials for the asbestos contractor to gain access to the ACM. Further details are presented in the dedicated Asbestos Study Report.

A3.5.3 Records show that bulk asbestos removals of ACM from the KTIP was undertaken prior to the removal of main plant and machinery some years ago. Site surveys and inspection of the plans for the KTA suggest that asbestos containing materials (ACM) are present in the chimney of the KTA. Drawings indicate that an asbestos rope was used to seal joints between the sections of the chimney. Such materials may only be accessible as the sections of the chimney are dismantled. Blasting could result in the uncontrolled release of asbestos fibre. Therefore blasting will not be an option. Other areas which will require investigation but which have to date not been accessed include the insulation to the carcass incinerator, the blood boilers and chimney duct insulation. However, the presence of ACM in these locations will not have a significant bearing on the choice of demolition method as they can be removed as soon as the relevant plant is decommissioned.

A3.5.4 Investigations have confirmed the presence of a typical low risk asbestos containing material (ACM) on the superstructures of the KTIP incinerator building. This is in the form of corrugated metal weather cladding with an asbestos type mastic protective paint coating. This is identical to ACM typically found at other industrial sites in Hong Kong, built in the 1960s and 1970s. Other ACM has also been identified at KTIP.

A3.5.5 Site visits did not reveal any potential ACM in the New World Bus Depot or the other parts of the Site. Other areas have been investigated but no potential ACM has been identified. Details are presented in the dedicated Asbestos Study Report (Asbestos Investigation Report and Asbestos Abatement Plan).

A3.6 Conclusion

A3.6.1 Based on the information presented in Section 3 the consultants believe that sufficient information has been gathered to recommend that the preferred method of demolition should adopt a top-down, non-explosive approach for the demolition of Kennedy Town Comprehensive Development Area.

A4. General Approach to Demolition of Buildings and Structures at KTCDA

A4.1 General Approach

A4.1.1 This section seeks to illustrate some of the more general procedures for demolition that would apply to KTCDA. The intention in this and section 5 is not to prescribe a precise method or provide a work specification or a demolition plan but to indicate the approach which should be taken, in sufficient detail to facilitate broad agreement on the methodology and progress Environmental Impact Assessment.

A4.1.2 Whereas the eventual detailed demolition plan of the selected demolition contractor(s) may not necessarily adopt the precise methodology proposed in this working paper, the consultants believe that general characteristics of the methods are appropriate. The methods are sufficiently effective and applicable for the tasks and where possible methods that will help reduce noise and dust nuisances have been indicated. The options selected are also broadly in line with the Draft Code of Practice for Demolition of Buildings (Buildings Department 1998) which will also need to be observed at the detailed design stage.

A4.1.3 The overriding concerns for the demolition Projects will be safety and minimisation of environmental impacts. This will include the safety of the operatives, safety of the other workers on the site and safety of the general public as well as protection of adjacent facilities and minimisation of nuisances.

A4.1.4 The Contractor should during the course of demolition, ensure and verify that all utilities and services have been rendered safe.

A4.2 Hoarding and Site Access

A4.2.1 Typical hoardings would to be provided along the site boundaries. Portable barricades will be used to cordon off different work zones where demolition is in progress. Where conditions warrant the Contractor should seek opinion and advice from the Site Engineer/AP/RSE in order to modify such plans accordingly.

A4.2.2 The buildings and chimneys are totally within the proposed Project site and access would be controlled by security guards. No members of the public or unauthorised person would be allowed to enter the sites.

A4.2.3 Only contractors’ personnel and Government officials concerned with the demolition would be allowed within the contractors working area.

A4.3 Demolition Principles

A4.3.1 Building and other structures should generally be demolished in the reverse order to that of their construction. The order of demolition for building would be progressive, storey by storey, having regard to the type of construction.

A4.3.2 As a general rule, wherever possible, external non-loading bearing cladding or any non-structural work should be removed first. All asbestos containing materials (ACM, particularly any ACM panels, would be removed prior to commencement of demolition works where ever possible. Other ACM may need to be removed as access is gained to particular areas and as the demolition progresses (see also section 3).

A4.3.3 Overloading of any parts of the remaining structure with debris or other materials should be avoided. Where materials and debris and are lowered from higher levels, care should be taken to prevent the material from swinging in such a manner that it creates a danger to the workers on site or the surrounding structures. Larger pieces of debris should be broken down into manageable sizes, subject to a maximum of 1.0m x 1.0m. The weight of loaded buckets for unloading debris would be limited to say, 200 kg.

A4.3.4 All debris would be removed at frequent intervals preferable on a daily basis and stockpiles should not be allowed to build up. In general it is anticipated that demolition waste would be removed on a daily basis with several tens of lorries leaving either site each day at the peak of demolition activities.

A4.3.5 Reinforced concrete structural members should be cut into lengths appropriate to the weight and size of member before being lowered to the ground. Where possible, crane and lifting gear should be used to support beams and columns whilst they are being cut and lowered to the ground.

A4.3.6 Removal of bricks walls should be from top to bottom in horizontal runs of not more that 300mm wide.

A4.3.7 Before and during demolition, the Contractor should pay attention to the nature and condition of the concrete, the condition and position of reinforcement, and the possibility of lack of continuity of reinforcement should be ascertained. Attention should also be paid to the principles of the structural design to identify parts of the structure, which cannot be removed in isolation. If uncertainties exist then advice of the Site Engineer/AP/RSE’s advice should be sought.

A4.3.8 During demolition works, if anomalies or irregularities are discovered in structural elements, regarding reinforcement bar details, alteration and addition works, unauthorised building works, etc, demolition works should stop immediately. AP/RSE should be informed and works will commence only after AP/RSE approval is obtained.

A4.3.9 If the Contractor discovers that the removal of certain parts of the buildings or structure during demolition would result in other parts becoming unsafe, it would be necessary to determine where temporary support will be needed and the advice of the Site Engineer/AP/RSE should be sought.

A4.4 General Safety Measures

A4.4.1 The Contractor will need to carry out works in accordance with the Factories and Industrial Undertakings Ordinance, particularly the Construction Site (Safety) Regulations and the Code of Practice for Scaffold Safety, as well as all other statutory requirements and guidelines covering health and safety issues.

A4.4.2 All contractor and sub-contractors should be competent and qualified in demolition works. Site Engineer/AP/RSE(s) will need to ensure that all levels of Contractor(s) and his subordinates are fully conversant with the demolition plans, method statements and procedures.

A4.4.3 Where scaffolding is used, the Contractor should arrange for a competent scaffolder to visit site and inspect the scaffolding work, and to make any adjustments required to the scaffolding as the work proceeds, to ensure its stability.

A4.4.4 The Contractor shall also appoint a competent person, experienced or trained in the type of operation being performed at that particular time, to supervise and control the work on site.

A4.4.5 The Contractor should ensure that every work place, approach and opening, which may pose a danger to persons employed and others should be properly illuminated and protected.

A4.4.6 The use of all mobile cranes must be strictly controlled to ensure that cranes of adequate capacity will be used for lifting under different loading conditions.

A5. Principles of Chimney Demolition at KTCDA

A5.1 Access

A5.1.1 The main site would be protected by security personnel and a high hoarding such that the public would be totally excluded from the Project.

A5.1.2 The area beneath the chimneys would be cordoned off and only authorised staff involved in the demolition of the chimneys would be allowed admission into the vicinity of the chimney structures.

A5.2 General Approach

A5.2.1 The principle of the demolition procedure for the upper portion of the chimneys (i.e. say 10meters from ground level or greater) is that the chimneys will be broken into small pieces on the spot by operatives using hand held tools. They would work from working platforms external to the chimney (Figure 5.1). Hydraulic breakers would be used for the remaining lower portions of the chimneys.

A5.2.2 Prior to the commencement of the demolition work, loose sand will be placed on top of the existing ground around the chimneys to receive small pieces of light debris that may fall. To facilitate the access of the excavators for the removal of debris, an access ramp will be formed. The vertical opening (former fan duct connection point) near the base of the stack would be blocked when demolition is in progress. This portal would be opened for removal of debris after completion of daily demolition work. The above mentioned method of removal of debris is only applicable to the demolition of the upper portion of the chimneys.

A5.2.3 For demolition of the lower portion, the demolished debris would be formed as an access ramp for the hydraulic breaker to ascend to a height sufficient to gain access and demolish the remaining portion of the chimney.

A5.2.4 The demolished debris would be broken down and removed by hydraulic excavators and loaded on to trucks for transportation to the designated disposal site. During the demolition work, water sprays will be used to suppress excessive dust generated by the processes.

A5.3 Preparation

A5.3.1 The area surrounding the chimney will be secured and all necessary barricades erected. Only authorised personnel will be allowed into the area. A steel external working platform system will be erected to surround the upper portion of the chimney, i.e. greater than 10 meters above ground level. The maximum distance between the floor levels of the working platforms will be two meters. Access steel ladders will be constructed from ground level to the top of each chimney, with proper handrails (Figure 5.1).

A5.4 Sequence of Operations

A5.4.1 The demolition sequence would involve the construction of a series of working platforms around the outside of a chimney. Workers would work from the top most platform to remove the chimney structure with the debris directed into the lower portion of the remaining chimney. This would involve the following steps.

a) All required preparation work and safety measures would be installed. The area surrounding the chimney would be made secure and all necessary barricades erected.

b) Safety netting and tarpaulins would be installed to enclose the location at which demolition work is in progress (i.e. the external boundary of the steel working platform from platform floor level to one meter above the top edge of the remaining chimney wall). Checks would be made to ensure no gaps were present between floor boards and between the front edge of platform and the external surface of the chimney, so as to avoid falling of broken pieces out beyond the netted working platform.

c) The portion of the wall from say 0.3m above the floor level of the working on the platform to the top of the chimney will be demolished by operatives working on the platform using hand held pneumatic breaking tools to break the existing chimney concrete into small pieces. Work would proceed from top working towards the lower level. The steel reinforcement exposed in the process would be cut by flame and lowered to ground.

d) After completing the work at one level operatives would descend to the working platform just below and remove the components of the upper platform carefully. Demolition at the lower platform level would then proceed safety nets will be installed in the same manner as described in procedure (b) above.

e) The debris would be cleaned out from the platform daily (each evening) to avoid accumulation of debris.

f) The same sequence of work from procedure (b) to (d) would be repeated until the chimney had been lowered down to approximately 10m chimney height, a level within the reach of mobile hydraulic breakers at ground level. The lower portion will be removed by these means.

A5.5 Duration of Demolition

A5.5.1 The buildings and chimneys at KTCDA can be demolished and removed by the conventional top down demolition using hand held tools and mechanical breaking methods. In order to avoid hazards caused to the adjacent areas, all the structures and other buildings near to the chimneys would be demolished and removed prior to the demolition of the chimneys.

A5.5.2 The estimated time for the completion of these works included in the PPFS was 12months which would appear to be ample time for demolition based on the above methodology.

A6. Conclusion

A6.1.1 This paper presented information concerning the difficulties associated with the demolition of the Kennedy Town Comprehensive Development Area (the Project). In order to facilitate the progress the EIA process as a whole it is necessary to define the Projects in sufficient detail in line with the objectives of the Study.

A6.1.2 The primary aim of this paper is to establish a conceptual demolition method in order to facilitate progress the EIAs. During the preliminary investigations the consultants have taken note of the work conducted previously and also initiated discussions with relevant Government departments, many of whom have expressed severe concerns with the proposals to include any form of blasting techniques for the felling of the chimneys or the main building structures at the site.

A6.1.3 In the selection of an appropriate demolition method the physical effects on local sensitive receivers and adjacent structures are very important. There are also hidden costs arising from the need to carefully co-ordinate demolition by implosion. The effect on marine and road transport systems and the complexity of implementing controls is also an important factor. The cumulative impacts of the surrounding interfaces on the project methods have been assessed and make demolition by implosion at either site a potentially costly and a very high risk proposal.

A6.1.4 The preferred demolition methodology presumes that a variety of top down methods would be used and various articles from a suite of powered mechanical equipment has been assumed to be in use at various locations across the site throughout the demolition. The use of jack-hammers and hydraulic breakers is efficient and noise and dust impacts can potentially be controlled by a range of mitigation measures (e.g. noise barriers, dust control) familiar to the construction industry in Hong Kong. In addition the statutory provisions under the Noise Control Ordinance and Air Pollution Control Ordinance control noise and dust from such operations. Due to the presence of ACM the preferred method of demolition must adopt non-explosive approach. The asbestos investigation and abatement plans are described in detail in the dedicated Asbestos Study Report.

A6.1.5 In order to facilitate the progress of the Environmental Impact Assessment the consultants sought and gained endorsement of the content of this paper. Whereas the eventual detailed demolition plan of the selected demolition contractor(s) may not necessarily adopt the precise methodology proposed in this working paper, the methods used shall adopt top-down, non-explosive methods for the demolition of Kennedy Town Comprehensive Development Area.

1. Hazards and Safety Precautions

1.1 Introduction

1.1.1 Hazards which may arise at KCIP generally be classified under the following headings:

· General Hazards

· Gas hazards

· Landfill leachate

1.2 General Safety

Operators

1.2.1 Operators should be experienced and licensed drivers. Where possible, all operators should be required to demonstrate their driving ability in the equipment they will be operating and under actual job conditions before recruitment.

1.2.2 Only personnel with valid driving licences are permitted to drive any site cars or vehicles. In the case of vehicles which are not intended for road use, the driver should hold a licence for the nearest comparable class of road vehicle.

1.2.3 For operators employed, a photocopy of their driving licence should be obtained. Their validity and the class of vehicle licences to drive should be checked.

1.2.4 The site office should keep an up to date list of names and copies of driving licences of drivers of motor vehicles and plant.

Equipment

1.2.5 Drivers should make a daily inspection of their vehicles. The check should include steering, brakes, mirrors, lights, horn, tires and windshield wipers. Reverse alarms which must be installed on all trucks and lorries should also be checked to ensure safe operation. Drivers are required to report all defects to the plant mechanic foreman, and repairs should be made promptly.

Roads

1.2.6 Site roads should be maintained in safe operating condition at all times. Roads should be built to provide adequate drainage and width and should avoid sharp curves, abrupt changes in gradient and excessive gradients. The use of one-way traffic roads is recommended wherever possible. Site roads must have clearly visible signs in both Chinese and English.

Transporting Personnel

1.2.7 Personnel should only ride in vehicles designed for the purposes. It is forbidden for personnel to take rides with operations where no specific sear has been provided for passengers.

Loading Lorries

1.2.8 Materials loaded onto lorries should be within the permitted safe weight limit and should not project beyond the lorry body or be placed in an unsafe pile in such a manner as to present a hazard to other vehicles, pedestrians or structures.

General Requirements

1.2.9 Drivers leaving the driver leaves the driving seat of a vehicle shall ensure the engine shall is switched off, the gear engaged and parking brakes applied. The wheels shall be chocked on slopes.

1.2.10 Lorries should only be backed under the direction of a marshal or spotter. In dumping areas, the marshal and spotters should be identified by a reflective vests.

1.2.11 All operators and drivers are required to observe speed limits at all times.

1.2.12 All pedestrians requiring to pass close to an operating machine shall ensure that the machine operator has been them and has stopped operation prior to proceeding.

1.2.13 All personnel working on site roads or directing traffic shall wear reflective vests.

Plant Noise

1.2.14 The foreman shall ensure that noise assessments are carried out on all noisy plant used on site. Any plant that creates noise exceeding the first action level stated in the Factories and Industrial Undertakings (Noise at Work) Regulations should be identified, with notices fixed to the plant and appropriate action should be taken as described in the Regulations to avoid exposure to the noise. Attention shall also be paid to the recommended Environmental Monitoring and Audit plan for the site.

1.3 Gas Hazards

1.3.1 Waste in the landfill emits a mixture of gases. The composition of gases at KCIP is not known however leachate gases of the following composition would not be untypical for such a site approximately as follow:

· 45-55% methane – Explosive.

· 44-54% Carbon Dioxide – Asphyxiant.

· 1% Other gases – mainly organic vapours.

1.3.2 The main danger from landfill gas is due to explosion of methane, however, if large concentrations of gas displace air there can be a danger of asphyxiation or poisoning. Gas concentrations are likely to be higher near the tops of gas wells and near exposed areas of leachate collection stone.

1.3.3 All personnel are advised to observe the following guidelines to avoid gas accidents:

· No smoking on the site.

· Do not enter trial pits unless the air quality has been tested (see 1.6)

· If any personnel has any of the following health symptoms while working at, in or near a trial pit on the Site he should move away from the area of the trial pit immediately:

- Headache,

- Dizziness / lightheadedness,

- Tingling or numbness,

- Nausea,

- Blue lips or bright red skin.

1.3.4 Once the affected person has moved to a position remote from the trail pit he should inform his supervisor who will evaluate the situation, decide whether other persons should be evacuated from the immediate area whether medical aid is required.

1.4 Landfill Leachate

1.4.1 Solid waste in the reclamation under the site or leachate originating from GDBL may be toxic, the following rules should therefore be observed:

· If leachate has to be handled, or groundwater samples lotion ensure that the operatives wear protective clothing and gloves. If any operatives come into contact with leachate, should be immediately wash the affected area with clean fresh water.

· Ensure that any broken skin, cuts, graze and the like do not come into contact with waste or leachate. All cuts etc should be covered prior to working on the site.

· Safety boots should be worn on the site.

· All operatives should keep a lookout for sharp objects on the site such as broken glass, syringe needles, nails in pieces of wood and the such like.

· If any operative receives any cuts or grazes whilst he is on he landfill, he should report this immediately to his supervisor who will arrange for medical attention.

1.5 Site Safety Precautions

1.5.1 All operational and supervisory staff’s attention shall be drawn to the hazards of landfill gas generated by decaying refuse in the landfill which may have migrated to the KCIP Site. This gas can endanger the safety of workers, as the flammable gas it contains explosive potential once it is mixed with air. Attention shall also be given to other components of the gas which have the potential to cause asphyxiation or toxic effects under appropriate conditions.

1.5.2 Smoking and the use of naked lights and welding shall be prohibited in areas of the site where landfill gas likely to be present and can migrate. Warning signs designating “no smoking areas” shall be put up to remind workers of these restrictions.

1.5.3 Plant and mobile plant shall carry fire extinguishers, and shall be equipped with properly functioning spark arrestors and automatic air intake shut down valves. Wherever possible diesel operated plant shall be used.

1.5.4 No fires shall be permitted on the site. Operational and supervisory staff shall immediately extinguish any fires within the site.

1.5.5 Confined spaces and excavation where entry is required shall be treated as described under Section 1.6.

1.5.6 Temporary offices, huts and storage containers shall not be located where infiltration of gas could occur, and in any event shall be provided with simple gas protection measures and detection systems where appropriate.

1.5.7 Fire fighting facilities shall be maintained on the site, and shall be property housed and kept readily available for instant use.

1.5.8 The site designated emergency co-ordinator shall liaise with the Fire Services Department to ensure that they are in a position to respond quickly to any fire or explosion which may occur. The emergency co-ordinator shall notify the Fire Services Department immediately in the event of any such emergency.

1.5.9 The site agent shall carry out the following:

· Prepare detailed working procedures and safety precautions for the work being carried out.

· Instruct the workmen and other staff in the working procedures and safety precautions to be followed.

· Record in writing that the workmen and other staff have been so instructed.

· Provided sufficient equipment so the working procedures and safety precautions can be followed.

· Ensure the working procedures and safety precautions are adhered to.

1.6 Working in Confined Spaces

1.6.1 The Site contractor shall ensure that any work in a confined space, as defined in the Factories and Industrial Undertakings (Confined Spaces) Regulations, complies with the requirements of the Regulations and is in accordance with the Guide to the Regulations published by the Labour Department.

1.6.2 All entries into confined spaces will be subject to a written detailed safe working procedure and a permit to work procedure. The written safe working procedure will include, but may not be limited to, details of the following: -

· arrangements for detecting toxic or explosive gas or oxygen deficiency, and the detection equipment to be used.

· supervision arrangements

· safety and emergency rescue equipment to be used, including breathing apparatus, safety harness and safety ropes

· permit to work procedures

1.6.3 All persons entering a confined space shall have received appropriate training from authorised bodies.

1.6.4 All written safe working procedures and completed “Permit-To-Work Certificate” shall be kept in the site office.

DOCUMENT TITLE PAGE
*Client :* Civil Engineering Department				*Contract No.* (if any) : - CE 15/99
*Project Title :* Environmental Impact Assessment for Demolition of Kwai Chung Incinerator Plant and Kennedy Town CDA				*Project No. :* 2996
*Document No. :* 2996-OR028-04				*Controlled Copy No. :*
*Document Title :* EM&A Manual KTCDA
*Covering Letter / Transmittal Ref. No. :* 2996/15.109/ELT /DG/OG				*Date of Issue :* September 2001
Revision, Review and Approval/Authorisation Records
		/	/		/
04	5^th Issue	Various/	JWS/		DG/
03	4^th Issue	Various/	JWS/		DG/
02	3^rd Issue	Various/	JWS/		DG/
01	2^nd Issue	Various/	WD/		DG/
00	1^st Issue	Various/	JWS/		DG/
Revision	Description	Prepared by / date	Reviewed by / date		App. or Auth. By / date

Controlled Copy No.	Issued to
1-45	Civil Engineering Department
46-47	ACL – ELAN

Monitoring Location
Details of Location
Sampler Identification
Date & Time of Sampling
Elapsed-time	Start (min.)
Meter Reading	Stop (min.)
Total Sampling Time (min.)
Weather Conditions
Site Conditions
	Pi (mmHg)
Initial Flow Rate, Qsi	Ti (^oC)
	Hi (in.)
	Qsi (Std. m³)
	Pf (mmHg)
Final Flow Rate, Qsf	Tf (^oC)
	Hf (in.)
	Qsf (Std. m³)
Average Flow Rate (Std. M³)
Total Volume (Std. m³)
Filter Identification No.
Initial Wt. Of Filter (g)
Final Wt. Of Filter (g)
Measured TSP Level (µg/m³)

AAP	Asbestos Abatement Plan
ACE	Advisory Committee on Environment
ACM	Asbestos Containing Material
AIR	Asbestos Investigation Report
AP	Authorised Person
APCO	Air Pollution Control Ordinance
BOO	Building Ordinance Office
CAP	Contamination Assessment Plan
CAR	Contamination Assessment Report
CED	Civil Engineering Department
CPLD	Committee on Planning & Land Development
CSTG	Cadogan Street Temporary Garden
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
G I/C	Government, Institutional/Community
KTA	Kennedy Town Abattoir
KTCDA	Kennedy Town Comprehensive Development Area
KTIP	Kennedy Town Incineration Plant
LDC	Land Development Corporation
LGHAGN	Landfill Gas Hazard Assessment Guidance Note
MTIA	Marine Traffic Impact Assessment
NWFB	New World First Bus Depot
PCWA	Public Cargo Working Area
PFBP	Public Fill Barging Point
PQA	Preliminary Quantitative Assessment
RAC	Registered Asbestos Consultant
R7	Route 7
RCP	Refuse Collection Point
RSE	Resident Site Engineer
SR	Sensitive Receiver
TIA	Traffic Impact Assessment
TM	Technical Memorandum
USD	Urban Services Department

Parameter	TCLP Limit (ppm)
Cadmium	10
Chromium	50
Copper	250
Nickel	250
Lead	50
Zinc	250
Mercury	1
Tin	250
Silver	50
Antimony	150
Arsenic	50
Beryllium	10
Thallium	50
Vanadium	250
Selenium	1
Barium	1000

1. INTRODUCTION

1.1.2 This Manual contains the following:

1.2.1 The Criteria for undertaking EM&A are provided by EPD, these are summarised as follows:

1.2.2 The conclusions from the EIA indicate that Criterion a) is relevant with respect to the possible impact excessive dust and noise may have on the sensitive receivers in close proximity to the KTCDA.

1.3.2 The structures to be demolished are summarised in Table 1.1.

1.4.1 This section identifies the sensitive receivers (SRs) affected by the Project as defined in the EIAO and summarises the main implications of the SRs and infrastructure on demolition methods. Sensitive receivers and other constraints are shown in Figure 1.1.

1.4.2 Residential, Government, Institutional and Community uses surround the KTCDA site and many are elevated and overlook the site. The nearest rank of sensitive receivers is discussed below.

1.4.3 Other premises in the low rise blocks in Cadogan Street (north of Victoria Road) haven been demolished.

1.4.4 Manhattan Heights high rise development at Kennedy Town New Praya and some of the residential units will overlook the site by the time demolition of KTCDA takes place.

1.4.5 There are other residential blocks further west along Victoria Road (e.g. Huncliffe Court) that would be shielded by the intervening structures such as the China Merchants Wharf Godown and other industrial buildings on Victoria Road.

1.4.7 The New World First Bus Depot and the Refuse Collection Point may require relocation prior to the demolition. However this is not material to the EIA as neither are defined as SRs. Road Traffic

1.5 General Approach to Demolition of Buildings and Structures at KTCDA

1.5.1 This section presents general procedures for demolition, which would be likely to apply to KTCDA to illustrate the agreed methodology which has been used to progress the Environmental Impact Assessment.

1.5.7 The Contractor shall arrange for a competent scaffolder to visit site and inspect the scaffolding work, and to make any adjustments as the work proceeds, to ensure its stability.

1.5.8 The Contractor should ensure that every work place, approach and opening, which may pose a danger to persons employed and others should be properly illuminated and protected.

1.5.9 The use of all mobile cranes must be strictly controlled to ensure that cranes of adequate capacity will be used for lifting under different loading conditions.

1.6.1 The area beneath the chimneys would be cordoned off and only authorised staff involved in the demolition of the chimneys would be allowed admission into the vicinity of the chimney structures.

1.7.1 The areas requiring decontamination, identified based on the Contamination Assessment Report and Remediation Action Plan are shown in Figure 6.1.

1.8.1 The EIA recommended a range of mitigation measures to control the demolition Project’s potential construction environmental impacts, which include dust and noise impacts. The schedule of mitigation measures is provided in Section 7 of this Manual.

1.9.2 The preferred approach is for the Independent Environmental Monitoring Team (ET) to be employed directly by the project proponent (CED). The monitoring is audited and checked by the Environmental Monitoring Team Leader (ETL) who reports to the Engineer’s Representative (ER).

1.9.4 Site Inspection Team Leader: Requires experience working on environmental projects in Hong Kong. Extensive experience in dealing directly with Contractors is required.

1.9.5 Noise/Air Specialist: Requires experience in the air and noise pollution field. Skills in the use of computer models, database design and management of monitoring programmes are required.

1.9.7 Assistant Consultant: Experience in conducting on-site monitoring, data-gathering and subsequent computer-modelling data analyses.

1.9.8 The duties to be undertaken by the Environmental Team (ET) comprise the following:

1.9.9 Appropriate resources shall be allocated by the ET to fulfil the duties specified in this Manual.

1.9.10 Independent Checker (Environment). The role of the IC(E) shall be independent from the management of construction works; but the IC(E) shall be empowered to audit the environmental performance of construction (Appendix B). The IC(E) shall have a similar of level of experience as the ETL.

2.1.1 Monitoring and audit of Total Suspended Particulates (TSP) levels shall be carried out by the ET to ensure that any deteriorating air quality can be readily detected and timely action taken to rectify the situation.

2.3.1 High volume samplers (HVS) to be used for carrying out the 1-hr and 24-hr TSP monitoring shall comply with the following specifications:

2.3.2 The ET shall provide sufficient equipment to ensure that the monitoring commences on schedule and is not interrupted as a result of equipment failure, damage, loss or routine maintenance.

2.3.3 The HVSs shall be equipped with an electronic mass flow controller and be calibrated against a traceable standard at regular intervals. All the equipment, calibration kit, filter papers, etc. shall be clearly labelled.

2.3.5 The flow-rate of the sampler before and after the sampling exercise with the filter in position shall be verified to be constant and be recorded in the data sheet (Table 2.4).

2.3.7 The ET shall provide sufficient wind data monitoring equipment to ensure that the monitoring commences on schedule and is not interrupted as a result of equipment failure, damage, loss or routine maintenance.

2.4.1 A clean laboratory with constant temperature and humidity control, equipped with necessary measuring and conditioning instruments, to handle the dust samples collected, shall be available for sample analysis, equipment calibration and maintenance.

2.4.3 Filter paper of size 8”x10” shall be labelled before sampling. It shall be a clean filter paper with no folds or pin holes, and shall be conditioned in a humidity controlled chamber for over 24-hr and be pre-weighed before sampling.

2.4.5 All the collected samples shall be retained and kept in a good condition for 6 months before disposal.

2.5.1 The dust sensitive receivers are shown in Figure 1.1. These include the following:

Existing Sensitive Receivers:

Future Receivers:

2.5.2 The status and locations of dust sensitive receivers may be revised after issue. The ET shall identify the SR locations to be adopted based on the updated construction programme and seek approval from the ER and relevant government departments.

Monitoring Locations

2.5.3 The monitoring locations should meet the following criteria:

2.5.5 The criteria for locating samplers shall be as follows, as far as practicable:

2.6.1 The ET shall carry out baseline monitoring as close as is practical to sensitive receivers as recommended above. It is recommended that 2 locations are selected for baseline monitoring around the site areas. The suggested initial locations are given in Figure 2.1.

2.6.2 The exact locations shall be agreed with the ER and relevant government departments prior to commencement of the monitoring programme.

2.6.4 During the baseline monitoring programme, there shall be no construction activity or dust generation activities in the vicinity of the monitoring stations which may affect the monitoring results.

2.6.5 In exceptional cases, when insufficient baseline monitoring data or questionable results are obtained, the ETL shall liaise with the ER to agree on an appropriate set of data to be used as a baseline reference and submit to ER and relevant government departments for approval.

Construction Dust

Airborne Fibre Monitoring

2.9.2 If the above measures are not sufficient to restore the air quality to acceptable levels upon the advice of ETL, the Contractor shall liaise with the ETL on some other mitigation measures, propose to ER for approval, and implement the mitigation measures.

2.9.4 The Contractor shall implement dust suppression measures as identified in the Schedule given in Section 8.

3. Noise

3.1.1 EM&A procedures for noise are recommended to ensure that the necessary controls are implemented effectively and that the noise criteria are not exceeded.

3.2.2 As supplementary information for data auditing, statistical results such as L10 and L90 shall also be obtained for reference. A sample data record sheet is shown in Table 3.4 is included for reference.

3.4.1 The noise sensitive receivers are shown in Figure 1.1. The monitoring locations are shown in Figure 3.1.

3.4.2 The status and locations of noise sensitive receivers may require review after issuing this manual. It is proposed that the ET shall revise the monitoring locations to be adopted based on prevailing conditions. These shall be agreed with the ER, IC(E) and relevant government departments.

3.4.3 Monitoring locations shall be based on the following criteria:

3.4.5 The following locations are identified as suitable monitoring locations Figure 2.1):

3.4.6 The sensitive receivers are sufficiently close by and for purposes of baseline monitoring purposes, three locations should be monitored.

3.4.8 The ETL shall agree with the ER, the monitoring position and the corrections to be adopted. Once the positions for the monitoring stations are chosen, the baseline monitoring and the impact monitoring shall be carried out at the same positions.

3.5.1 The ETL shall carry out baseline noise monitoring prior to the commencement of the construction works. The baseline monitoring shall be carried out for 14 days at locations to the proposed positions to the east, south and west of the site.

3.5.3 There shall not be any abnormal activities in the vicinity of the monitoring stations during the baseline monitoring which would cause the monitoring results to be elevated above normal background conditions.

3.5.4 In exceptional cases, when insufficient baseline monitoring data or questionable results are obtained, the ETL shall liaise with EPD to agree on an appropriate set of data to be used as a baseline reference for approval.

3.6.1 Noise monitoring shall be carried out at 3 locations per week. The monitoring frequency shall depend on the scale of the construction activities. The following defines the regular monitoring frequency for 3 stations on a per week basis when noise generating activities are underway:

3.6.2 For measurements b), c) and d) above, one set of measurements shall at least include 3 consecutive Leq (5 min) results.

3.6.4 In case of non-compliance with the construction noise criteria, more frequent monitoring may be required in line with the Event Action Plan. This additional monitoring shall be continued until the recorded noise levels are rectified or proved to be unrelated to the demolition activities.

3.7.1 The Action and Limit levels for construction noise are defined in Table 3.1. Should non-compliance of the criteria occur, action in accordance with the Action Plan in Table 3.2, shall be carried out.

3.8.1 The EIA has discussed the noise mitigation measures in general terms. These are given in more detail below. Noise mitigation measures are identified in Section 10.

3.8.2 The Contractor shall consider noise as an environmental constraint in his planning and execution of the Works.

3.8.4 The Contractor’s attention is drawn to all Regulations made under the Noise Control Ordinance. Those currently in force are :-

3.8.6 The Contractor’s attention shall be drawn to the fact that other construction work in the vicinity of the Site will be taken into account by EPD in assessing applications for CNP.

3.8.7 The Contractor shall arrange methods of working to minimise noise impacts, and shall provide experienced personnel to ensure that these methods are implemented.

3.8.9 If the above measures are not sufficient to restore the construction noise quality to an acceptable level upon the advice of ETL, the Contractor shall liaise with the ETL on alternative mitigation measures, propose to ER for Approval, and carry out the mitigation measures.

4. Water Quality

3.2.2 As supplementary information for data auditing, statistical results such as L₁₀and L₉₀ shall also be obtained for reference. A sample data record sheet is shown in Table 3.4 is included for reference.