14.                         IMPLEMENTATION SCHEDULE OF THE PROPOSED MITIGATION MEASURES

14.1                     The IWMF at the TTAL site

Table 14.1                Implementation Schedule for Air Quality Measures for the IWMF at the TTAL site

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S3a.8.1

Air Pollution Control (Construction Dust) Regulation & Good Site Practices

·       Use of regular watering, with complete coverage, to reduce dust emissions from exposed site surfaces and unpaved roads, particularly during dry weather.

·       Use of frequent watering for particularly dusty construction areas and areas close to ASRs.

·       Side enclosure and covering of any aggregate or dusty material storage piles to reduce emissions.  Where this is not practicable owing to frequent usage, watering shall be applied to aggregate fines.

·       Open stockpiles shall be avoided or covered.  Where possible, prevent placing dusty material storage piles near ASRs.

·       Tarpaulin covering of all dusty vehicle loads transported to, from and between site locations.

·       Establishment and use of vehicle wheel and body washing facilities at the exit points of the site.

·       Provision of wind shield and dust extraction units or similar dust mitigation measures at the loading points, and use of water sprinklers at the loading area where dust generation is likely during the loading process of loose material, particularly in dry seasons/ periods.

·       Imposition of speed controls for vehicles on unpaved site roads.  Ten kilometers per hour is the recommended limit.

·       Where possible, routing of vehicles and positioning of construction plant should be at the maximum possible distance from ASRs.

·       Instigation of an environmental monitoring and auditing program to monitor the construction process in order to enforce controls and modify method of work if dusty conditions arise.

Work site / During the construction period

Contractor

 

ü

 

 

Air Pollution Control (Construction Dust) Regulation

S3a.6.3

Odour Removal by Deodorizers

·       Deodorizers with 95% odour removal efficiency would be installed for the air ventilated from the mechanical treatment plant before discharge to the atmosphere

Waste reception halls, the waste storage area, the mechanical treatment plant / During design & operation phase

IWMF Operator

ü

 

ü

 

EIAO-TM

S3a.8.2

Air Pollution Control and Stack Monitoring

·       Air pollution control and stack monitoring system will be installed for the IWMF to ensure that the emissions from the IWMF stack will meet the proposed target emission limits.

IWMF stack emissions / During design & operation phase

IWMF Operator

ü

 

ü

 

EIAO-TM

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.2                Implementation Schedule for Water Quality Measures for the IWMF at the TTAL site

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S5a.8.1.1

Drainage and Construction Site Runoff

The site practices outlined in ProPECC PN 1/94 “Construction Site Drainage” should be followed as far as practicable in order to minimize surface runoff and the chance of erosion.  These practices include the following items:

·       At the start of site establishment, perimeter cut-off drains to direct off-site water around the site should be constructed with internal drainage works and erosion and sedimentation control facilities implemented.  Channels (both temporary and permanent drainage pipes and culverts), earth bunds or sand bag barriers should be provided on site to direct storm water to silt removal facilities.  The design of the temporary on-site drainage system will be undertaken by the contractor prior to the commencement of construction.

·       Boundaries of earthworks should be surrounded by dykes or embankments for flood protection, as necessary.

·       Sand/silt removal facilities such as sand/silt traps and sediment basins should be provided to remove sand/silt particles from runoff to meet the requirements of the TM-DSS.  The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94, which states that the retention time for silt/sand traps should be 5 minutes under maximum flow conditions.  The detailed design of the sand/silt traps shall be undertaken by the contractor prior to the commencement of construction.

·       Water pumped out from foundation piles must be discharged into silt removal facilities.

·       Measures should be taken to minimize the ingress of site runoff and drainage into excavations.  Drainage water pumped out from excavations should be discharged into storm drains via silt removal facilities.

·       During rainstorms, exposed slope/soil surfaces should be covered by a tarpaulin or other means, as far as practicable.  Other measures that need to be implemented before, during and after rainstorms are summarized in ProPECC PN 1/94.

·       Exposed soil areas should be minimized to reduce potential for increased siltation and contamination of runoff.

·       Earthwork final surfaces should be well compacted and subsequent permanent work or surface protection should be immediately performed.

·       Open stockpiles of construction materials or construction wastes on-site should be covered with tarpaulin or similar fabric during rainstorms.

·       All vehicles should be cleaned before leaving the works area to ensure no earth, mud and debris is deposited on roads.  An adequately designed and sited wheel washing bay should be provided at every site exit.  The wheel washing facility should be designed to minimize the intake of surface water (rainwater).  Wash-water should have sand and silt settled out and removed at least on a weekly basis to ensure the continued efficiency of the process.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5a.8.1.2

General Construction Activities

Construction solid waste should be collected, handled and disposed of properly to avoid entering to the nearby watercourses and public drainage system.  Rubbish and litter from construction sites should also be collected to prevent spreading of rubbish and litter from the site area.  It is recommended to clean the construction sites on a regular basis.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5a.8.1.3

There is a need to apply to EPD for a discharge licence for discharge of effluent from the construction site under the WPCO. The discharge quality must meet the requirements specified in the discharge licence. All the run-off and wastewater generated from the works areas should be treated so that it satisfies all the standards listed in the Technical Memorandum on Standards for Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters (TM-DSS). The beneficial uses of the treated effluent for other on-site activities such as dust suppression and general cleaning etc., can minimise water consumption and reduce the effluent discharge volume. If monitoring of the treated effluent quality from the works areas is required during the construction phase of the Project, the monitoring should be carried out in accordance with the relevant WPCO licence which is under the ambit of regional office of EPD.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5a.8.1.4

Accidental Spillage

Contractor must register as a chemical waste producer if chemical wastes would be produced from construction activities.  The Waste Disposal Ordinance (Cap 354) and its subsidiary regulations in particular the Waste Disposal (Chemical Waste) (General) Regulation should be observed and complied with for control of chemical wastes.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5a.8.1.5

Maintenance of vehicles and equipments involving activities with potential for leakage and spillage should only be undertaken within the areas which appropriately equipped to control these discharges.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5a.8.1.6

Oils and fuels should only be used and stored in designated areas which have pollution prevention facilities.  All fuel tanks and storage areas should be sited on sealed areas in order to prevent spillage of fuels and solvents to the nearby watercourses.  All waste oils and fuels should be collected in designated tanks prior to disposal.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5a.8.1.7

Disposal of chemical wastes should be carried out in compliance with the Waste Disposal Ordinance.  The Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes published under the Waste Disposal Ordinance details the requirements to deal with chemical wastes.  General requirements are given as follows:

·       Suitable containers should be used to hold the chemical wastes to avoid leakage or spillage during storage, handling and transport.

·       Chemical waste containers should be suitably labelled, to notify and warn the personnel who are handling the wastes, to avoid accidents.

·       Storage area should be selected at a safe location on site and adequate space should be allocated to the storage area.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5a.8.1.8

Sewage Effluent

Temporary sanitary facilities, such as portable chemical toilets, should be employed on-site where necessary to handle sewage from the workforce.  A licensed contractor would be responsible for appropriate disposal and maintenance of these facilities.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5a.8.2.1

Operational Phase Discharges

The Project Site will be equipped with an adequately sized wastewater treatment plant to provide treatment to some wastewater generated from the IWMF (mainly human sewage) for reuse in the incineration plant and the mechanical treatment plant or for washdown and landscape irrigation in the IWMF site.  A “net zero discharge” scheme will be adopted during the operation of the IWMF Phase 1.

Within IWMF site / During the operational phase

IWMF Operator

ü

 

ü

 

WPCO

S5a.8.2.3

A pipeline drainage system will serve the development area collecting surface runoff from paved areas, roof, etc.  Sustainable drainage principle would be adopted in the drainage system design to minimize peak surface runoff, maximize permeable surface and maximize beneficial use of rainwater.

Within IWMF site / During the operational phase

IWMF Operator

ü

 

ü

 

WPCO

S5a.8.2.4

Oil interceptors should be provided in the drainage system of any potentially contaminated areas (such as truck parking area and maintenance workshop) and regularly cleaned to prevent the release of oil products into the storm water drainage system in case of accidental spillages. Accidental spillage should be cleaned up as soon as practicable and all waste oils and fuels should be collected and handled in compliance with the Waste Disposal Ordinance.

Within IWMF site / During the operational phase

IWMF Operator

ü

 

ü

 

WPCO; WDO

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.3                Implementation Schedule for Waste Quality Measures for the IWMF at the TTAL site

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S6a.5.1.2

Good Site Practices

Adverse environmental impacts in relation to waste management are not expected, provided that good site practices are strictly followed. Recommendations for good site practices during the construction activities would include:

·               Obtain relevant waste disposal permits from appropriate authorities, in accordance with the Waste Disposal Ordinance (Cap. 354) and subsidiary Regulations and the Land (Miscellaneous Provisions) Ordinance (Cap. 28);

·               Provide staff training for proper waste management and chemical handling procedures;

·               Provide sufficient waste disposal points and regular waste collection;

·               Provide appropriate measures to minimise windblown litter and dust during transportation of waste by either covering trucks or by transporting wastes in enclosed containers; and

·               Carry out regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

·               Separate chemical wastes for special handling and disposed of to licensed facility for treatment; and

·               Employ licensed waste collector to collect waste.

 

Work Site/ During Construction Period

Contractor

 

ü

 

 

WDO; LDO; ETWB TCW No. 19/2005; EIAO-TM

S6a.5.1.3

Waste Reduction Measures

Good management and control can prevent the generation of a significant amount of waste. Waste reduction is best achieved at the planning and design stage, as well as by ensuring the implementation of good site practices. Recommendations to achieve waste reduction include:

·               Design foundation works that could minimise the amount of excavated material to be generated.

·               Provide training to workers on the importance of site cleanliness and appropriate waste management procedures, including waste reduction, reuse and recycling;

·               Sort out demolition debris and excavated materials from demolition works to recover reusable/recyclable portions (i.e. soil, broken concrete, metal etc.);

·               Segregate and store different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal;

·               Encourage the collection of aluminium cans by providing separate labelled bins to enable this waste to be segregated from other general refuse generated by the work force;

·               Proper storage and site practices to minimise the potential for damage or contamination of construction materials; and

·               Plan and stock construction materials carefully to minimise amount of waste to be generated and to avoid unnecessary generation of waste.

Work Site/ During Design & Construction Period

Contractor

ü

ü

 

 

 

S6a.5.1.5

Construction and Demolition Materials

In order to minimise the impact resulting from collection and transportation of C&D material for off-site disposal, the excavated material arising from site formation and foundation works should be reused on-site as backfilling material and for landscaping works as far as practicable. Other mitigation requirements are listed below:

·               A Waste Management Plan (WMP), which becomes part of the Environmental Management Plan (EMP), should be prepared in accordance with ETWB TCW No.19/2005;

·               A recording system for the amount of wastes generated, recycled and disposed (including the disposal sites) should be adopted for easy tracking; and

·               In order to monitor the disposal of C&D material at public filling facilities and landfills and to control fly-tipping, a trip-ticket system should be adopted (refer to ETWB TCW No. 31/2004).

Work Site/ During Design & Construction Period

Contractor

ü

ü

 

 

ETWB TCW No. 33/2002; ETWB TCW No. 19/2005; ETWB TCW No. 31/2004

S6a.5.1.6-S6a.5.1.7

The Contactor should prepare and implement an EMP in accordance with ETWB TCW No.19/2005, which describes the arrangements for avoidance, reuse, recovery, recycling, storage, collection, treatment and disposal of different categories of waste to be generated from construction activities.  Such a management plan should incorporate site specific factors, such as the designation of areas for segregation and temporary storage of reusable and recyclable materials.  The EMP should be submitted to the Engineer for approval.  The Contractor should implement waste management practices in the EMP throughout the construction stage of the Project.  The EMP should be reviewed regularly and updated by the Contractor, preferably on a monthly basis.

All surplus C&D materials arising from or in connection with construction works should become the property of the Contractor when it is removed unless otherwise stated.  The Contractor would be responsible for devising a system to work for on-site sorting of C&D materials and promptly removing all sorted and process materials arising from the construction activities to minimize temporary stockpiling on-site. The system should be included in the EMP identifying the source of generation, estimated quantity, arrangement for on-site sorting, collection, temporary storage areas and frequency of collection by recycling Contractors or frequency of removal off-site.

Work Site/ During Design & Construction Period

Contractor

ü

ü

 

 

ETWB TCW No. 19/2005

S6a.5.1.8

Chemical Wastes

Should chemical wastes be produced at the construction site, the Contractor would be required to register with EPD as a Chemical Waste Producer and to follow the guidelines stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. Good quality containers compatible with the chemical wastes should be used, and incompatible chemicals should be stored separately. Appropriate labels should be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste (such as explosive, flammable, oxidizing, irritant, toxic, harmful, or corrosive). The Contractor should employ a licensed collector to transport and dispose of the chemical wastes, to either the Chemical Waste Treatment Centre at Tsing Yi, or another licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

Work Site/ During Construction Period

Contractor

 

ü

 

 

Waste Disposal (Chemical Waste) (General) Regulation

S6a.5.1.9

General Refuse

General refuse should be stored in enclosed bins or compaction units separate from C&D material. A licensed waste collector should be employed by the Contractor to remove general refuse from the site, separately from C&D material. Preferably an enclosed and covered area should be provided to reduce the occurrence of ‘wind blown’ light material.

Work Site/ During Construction Period

Contractor

 

ü

 

 

Public Health and Municipal Services Ordinance

S6a.5.2.1

Good Site Practices

It is recommended that the following good operational practices should be adopted to minimise waste management impacts:

·               Obtain the necessary waste disposal permits from the appropriate authorities, in accordance with the Waste Disposal Ordinance (Cap. 354) and Waste Disposal (Chemical Waste) (General) Regulation;

·               Nomination of an approved person to be responsible for good site practice, arrangements for collection and effective disposal to an appropriate facility of all wastes generated at the site;

·               Use of a waste haulier licensed to collect specific category of waste;

·               A trip-ticket system should be included as one of the contractual requirements and implemented by the Environmental Team to monitor the disposal of solid wastes at landfills, and to control fly tipping. Reference should be made to ETWB TCW No. 31/2004.

·               Training of site personnel in proper waste management and chemical waste handling procedures;

·               Separation of chemical wastes for special handling and appropriate treatment at a licensed facility;

·               Routine cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

·               Provision of sufficient waste disposal points and regular collection for disposal;

·               Adoption of appropriate measures to minimize windblown litter and dust during transportation of waste, such as covering trucks or transporting wastes in enclosed containers; and

·               Implementation of a recording system for the amount of wastes generated, recycled and disposed of (including the disposal sites).

IWMF Site/During Operation Period

IWMF Operator

 

 

ü

 

Waste Disposal Ordinance (Cap. 354); Waste Disposal (Chemical Waste) (General) Regulation; ETWB TCW No. 31/2004

 

S6a.5.2.2

Waste Reduction Measures

Good management and control can prevent the generation of significant amounts of waste. It is recommended that the following good operational practices should be adopted to ensure waste reduction:

·               Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal;

·               Encourage collection of aluminium cans, plastic bottles and packaging material (e.g. carton boxes) and office paper by individual collectors.  Separate labelled bins should be provided to help segregate this waste from other general refuse generated by the work force; and

·               Any unused chemicals or those with remaining functional capacity should be reused as far as practicable.

IWMF Site/ During Operation Period

IWMF Operator

 

 

ü

 

 

S6a.5.2.3

Storage, Handling, Treatment, Collection and Disposal of Incineration By-Products

The following measures are recommended for the storage, handling and collection of the incineration by-products:

·               Ash should be stored in storage silos;

·               Ash should be handled and conveyed in closed systems fully segregated from the ambient environment;

·               Ash should be wetted with water to control fugitive dust, where necessary;

·               All fly ash and APC residues should be treated, e.g. by cement solidification or chemical stabilization, for compliance with the proposed Incineration Residue Pollution Control Limits and leachability criteria prior to disposal;

·               The ash should be transported in covered trucks or containers to the designated landfill site.

 

The Contractor should provide EPD with chemical analysis results of the bottom ash, and treated fly ash and APC residues to confirm that the ash/residue can comply with the proposed Incineration Residue Pollution Control Limits before disposal.

IWMF Site/ During Operation Period

IWMF Operator

 

 

ü

 

Incineration Residue Pollution Control Limits

S6a.6.3.1

Fuel Oil Tank Construction and Test

·               The fuel tank to be installed should be of specified durability.

·               Double skin tanks are preferred.

·               Underground fuel storage tank should be placed within a concrete pit.

·               The concrete pit shall be accessible to allow regular tank integrity tests to be carried out at regular intervals.

·               Tank integrity tests should be conducted by an independent qualified surveyor or structural engineer.

·               Any potential problems identified in the test should be rectified as soon as possible.

Fuel Oil Storage

Tank/ During Design,

Construction and

Operation Periods

IWMF Contractor

ü

ü

ü

 

 

S6a.6.3.1

Fuel Oil Pipeline Construction and Test

·               Installation of aboveground fuel oil pipelines is preferable; if underground pipelines are unavoidable, concrete lined trenches should be constructed to contain the pipelines.

·               Double skin pipelines are preferred.

·               Distance between the fuel oil refuelling points and the fuel oil storage tank shall be minimized.

·               Integrity tests for the pipelines should be conducted by an independent qualified surveyor or structural engineer at regular intervals.

·               Any potential problems identified in the test should be rectified as soon as possible.

Fuel Oil

Pipelines/ During Design,

Construction and

Operation Periods

IWMF Contractor

ü

ü

ü

 

 

S6a.6.3.1

Fuel Oil Leakage Detection

·               Installation of leak detection device at storage tank and pipelines.

·               Installation and use of pressure gauges (e.g. at the two ends of a filling line) in fuel filling, which allows unexpected pressure drop or difference and sign of leakage to be detected.

Fuel Oil Storage

Tank and

Pipelines/ During Design,

Construction and

Operation Periods

IWMF Contractor

ü

ü

ü

 

 

S6a.6.3.1

Fuel Oil Storage Tank Refuelling

·               Storage tank refuelling (from road tanker) should only be conducted by authorized staff of the oil company using the company’s standard procedures.

Fuel Oil

Refuelling Point/ During

Operation Period

IWMF Operator

 

 

ü

 

 

S6a.6.3.1

Fuel Oil Spillage Response

An Oil Spill Response Plan should be prepared by the operator to document the appropriate response procedures for oil spillage incidents in detail. General procedures to be taken in case of fuel oil spillage are presented below.

·               Training

-      Training on oil spill response actions should be given to relevant staff. The training shall cover the followings:

Ø          Tools & resources to combat oil spillage and fire, e.g. locations of oil spill handling equipment and fire fighting equipment;

Ø          General methods to deal with oil spillage and fire incidents;

Ø          Procedures for emergency drills in the event of oil spills and fire; and

Ø          Regular drills shall be carried out.

·               Communication

-      Establish communication channel with the Fire Services Department (FSD) and EPD to report any oil spillage incident so that necessary assistance from relevant department can be quickly sought.

·               Response Procedures

-      Any fuel oil spillage within the IWMF site should be immediately reported to the Plant Manager with necessary details including location, source, possible cause and extent of the spillage.

-      Plant Manager should immediately attend to the spillage and initiate any appropriate action to confine and clean up the spillage. The response procedures shall include the following:

Ø          Identify and isolate the source of spillage as soon as possible.

Ø          Contain the oil spillage and avoid infiltration into soil/ groundwater and discharge to storm water channels.

Ø          Remove the oil spillage.

Ø          Clean up the contaminated area.

Ø          If the oil spillage occurs during storage tank refuelling, the refueling operation should immediately be stopped.

Ø          Recovered contaminated fuel oil and the associated material to remove the spilled oil should be considered as chemical waste. The handling and disposal procedures for chemical wastes are discussed in the following paragraphs.

IWMF Site/ During

Operation Period

IWMF Operator

 

 

ü

 

 

S6a.6.3.2

Chemicals and Chemical Wastes Handling & Storage

·               Chemicals and chemical wastes should only be stored in suitable containers in purpose-built areas.

·               The storage of chemical wastes should comply with the requirements of the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

·               The storage areas for chemicals and chemical wastes shall have an impermeable floor or surface. The impermeable floor/ surface shall possess the following properties:

-      Not liable to chemically react with the materials and their containers to be stored.

-      Able to withstand normal loading and physical damage caused by container handling

-      The integrity and condition of the impermeable floor or surface should be inspected at regular intervals to ensure that it is satisfactorily maintained

Ø          For liquid chemicals and chemical wastes storage, the storage area should be bunded to contain at least 110% of the storage capacity of the largest containers or 20% of the total quantity of the chemicals/chemical wastes stored, whichever is the greater.

Ø          Storage containers shall be checked at regular intervals for their structural integrity and to ensure that the caps or fill points are tightly closed.

Ø          Chemical handling shall be conducted by trained workers under supervision.

Chemicals and

Chemical Wastes

Storage Area / During

Operation Period

IWMF Operator

 

 

ü

 

 

S6a.6.3.2

Chemicals and Chemical Wastes Spillage Response

A Chemicals and/ or Chemical Wastes Spillage Response Plan shall be prepared by the operator to document in detail the appropriate response procedures for chemicals or chemical wastes spillage incidents. General procedures to be undertaken in case of chemicals/ chemical waste spillages are presented below.

·               Training

-      Training on spill response actions should be given to relevant staff. The training shall cover the followings:

Ø          Tools & resources to handle spillage, e.g. locations of spill handling equipment;

Ø          General methods to deal with spillage; and

Ø          Procedures for emergency drills in the event of spills.

·               Communication

-      Establish communication channel with FSD and EPD to report the spillage incident so that necessary assistance from relevant department can be quickly sought.

·               Response Procedures

-      Any spillage within the IWMF site should be reported to the Plant Manager.

-      Plant Manager shall attend to the spillage and initiate any appropriate actions needed to confine and clean up the spillage. The response procedures shall include the followings:

Ø          Identify and isolate the source of spillage as soon as possible;

Ø          Contain the spillage and avoid infiltration into soil/ groundwater and discharge to storm water channels (in case the spillage occurs at locations out of the designated storage areas);

Ø          Remove the spillage; the removal method/ procedures documented in the Material Safety Data Sheet (MSDS) of the chemicals spilled should be observed;

Ø          Clean up the contaminated area (in case the spillage occurs at locations out of the designated storage areas); and

Ø          The waste arising from the cleanup operation should be considered as chemical wastes.

IWMF Site/ During

Operation Period

IWMF Operator

 

 

ü

 

 

S6a.6.3.3

Preventive Measures for Incineration By-products Handling

The recommended measures listed below can minimize the potential contamination to the surrounding environment due to the incineration by-products:

·               Ash should be stored in storage silos;

·               Ash should be handled and conveyed in closed systems fully segregated from the ambient environment;

·               Ash should be wetted with water to control fugitive dust, where necessary;

·               All fly ash and APC residues should be treated, e.g. by cement solidification or chemical stabilization, for compliance with the proposed Incineration Residue Pollution Control Limits and leachability criteria prior to disposal;

·               The ash should be transported in covered trucks or containers to the designated landfill site.

Storage, Handling

& Collection of

Incineration Ash

at IWMF/ During

Operation Period

IWMF Operator

 

 

ü

 

 

S6a.6.3.4- S6a.6.3.6

Incident Record

After any spillage, an incident report should be prepared by the Plant Manager. The incident report should contain details of the incident including the cause of the incident, the material spilled and estimated spillage amount, and also the response actions undertaken. The incident record should be kept carefully and able to be retrieved when necessary.

The incident report should provide sufficient details for the evaluation of any environmental impacts due to the spillage and assessment of the effectiveness of measures taken.

In case any spillage or accidents results in significant land contamination, EPD should be informed immediately and the IWMF operator should be responsible for the cleanup of the affected area.  The responses procedures described in Section 6a.6.3.1 and Section 6a.6.3.2 of EIA report should be followed accordingly together with the land contamination assessment and remediation guidelines stipulated in the Guidance Manual for Use of Risk-based Remediation Goals for Contaminated Land Management and the Guidance Note for Contaminated Land and Remediation.

IWMF Site/ During

Operation Period

IWMF Operator

 

 

ü

 

Guidance Manual for Use of Risk-based Remediation Goals for Contaminated Land Management and the Guidance Note for Contaminated Land and Remediation.

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.4                Implementation Schedule for Ecological Quality Measures for the IWMF at the TTAL site

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

 

 

 

S7a.8.2.2

 

 

S7a.8.2.2

 

 

 

 

S7a.8.2.3 

 

 

 

 

 

 

 

 

 

 

 

 

 

S7a.8.2.4

Measures to avoid mortality of Little Grebe

·        Site formation work shall be scheduled to commence in dry season.

·        Hoarding and waterproof membrane shall be set up between the work boundary and the unoccupied Middle Lagoon before backfilling.

·        As a precautionary measure, the whole Project site shall be thoroughly inspected twice at the earliest two weeks prior the proposed commencement date of construction activities to confirm no breeding activities of Little Grebe (including their eggs, chicks and juveniles) would be affected by the construction activities.  The inspection shall be performed by experienced ecologist(s) with over seven year experience in the relevant aspect.  Agriculture, Fisheries and Conservation Department (AFCD) shall be informed in writing about the suitability of commencing construction work at the Project site before the commencement of any site activities.

·        If breeding activities of Little Grebe are found during site inspection, the construction programme and method shall be reviewed.

Middle Lagoon/Design and Construction Phases

IWMF design team/ environmental team/ contractor

ü

ü

 

 

 

 

 

S7a.8.2.7

Measures to avoid loss of gorgonians

·        The location of the saline water outfalls has been refined away from gorgonians so as to avoid any direct impact to the gorgonians.

Seawall/Design Phase

IWMF design team

ü

 

 

 

 

 

 

S7a.8.2.10

 

 

 

 

 

 

 

 

 

 

 

 

S7a.8.2.10

 

 

 

 

 

 

 

 

S7a.8.2.12

Measures to minimize disturbance impact to wildlife

·        Hoarding of at least 3 m high shall be set up along the southern and western boundary of the works areas during the formation of the additional compensatory habitat and associated site access to shield the fauna in the Middle Lagoon and other natural habitats from the visual disturbance by human activities during construction phase.  After the establishment of the additional compensatory habitat, the hoarding at the western boundary shall be disassembled.  New hoarding shall be set up between the additional compensatory habitat and the site. 

·        The works boundaries shall be confined within the proposed project site.  All work crews and equipment shall be restricted within the designated works area only.  Any personnel shall be prohibited to encroach or wilfully disturb any wild animals and their habitats.  Traffic and human access from the western side of the project site shall be avoided.

·        Boundary walls of at least 3.5 m high with climbing planting or plantation shall be provided, where practicable, along the southern of the project site and between the access road and the additional compensatory habitat for Little Grebe, to screen the surrounding habitats from the IWMF works areas.

 

 

 

Southern and western boundary of works areas/Construction Phase

 

 

 

 

 

 

 

Boundary of works areas/  Construction and Operation Phase

 

 

 

 

Boundary of works areas/ Design, Construction and Operation Phase

 

 

 

Contractor

 

 

 

 

 

 

 

 

 

 

 

Contractor/IWMF Operator

 

 

 

 

 

 

IWMF design team/ Contractor/ IWMF Operator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ü

 

 

 

ü

 

 

 

 

 

 

 

 

 

 

 

ü

 

 

 

 

 

 

 

ü

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ü

 

 

 

 

 

 

 

ü

 

 

 

S7a.8.2.15

Measures to minimize impacts to natural habitats

·         The site formation work shall be scheduled to the dry season when the water level in the Middle Lagoon is minimal. 

 

 

Works area/Construction Phase

 

 

 

 

IWMF design team/ Contractor

 

 

 

ü

 

 

 

ü

 

 

 

 

 

 

 

 

 

 

S7a.8.2.16

Minimize sedimentation/water quality impacts to waterbodies

·         Measures to control potential water quality impacts to the nearby aquatic and marine environment during construction phase shall be implemented.

·         To minimize the potential water quality impacts from the construction works located at or near any seafront, the practices outlined in ETWB TC (Works) No. 5/2005 Protection of natural streams/ rivers from adverse impacts arising from construction works shall be adopted where applicable.

Works areas/Construction Phase

Contractor

 

ü

 

 

 

ETWB TC (Works) No. 5/2005 Protection of natural streams/ rivers from adverse impacts arising from construction works

S7a.8.2.17

Minimize general disturbance in construction phase

·         Placement of equipment or stockpile in designated works areas, and selection of access routes on existing disturbed land to minimize disturbance to the unoccupied ash lagoons or natural habitat;

·         Construction activities shall be restricted to works areas that would be clearly demarcated.  Access to areas of the ash lagoon outside the works areas shall be strictly prohibited.

·         The works areas shall be reinstated immediately after completion of works;

·         Waste skips shall be provided to collect general refuse and construction wastes.  The wastes should be disposed of timely and properly off-site;

·         Drainage arrangements shall include sediment traps to collect and control construction run-off;

·         Open burning on works sites is illegal, and shall be strictly prohibited, temporary fire fighting equipment in the works areas shall be provided to prevent any open fire.

·         Fences along the boundary of works areas shall be provided before the commencement of works to prevent tipping, vehicle movements and encroachment of personnel into adjacent areas.

Whole site/ Construction Phase

Contractor

 

ü

 

 

 

 

S7a.8.2.11 and S7a.8.2.17

Minimize noise disturbance

·         Noise mitigation measures including the use of quieter piling machinery and construction plants and full enclosure for static plant shall be implemented to lower the noise level due to construction works.

·         Only well-maintained plant shall be operated on site and plant shall be serviced regularly during the construction programme.

·         Machines and plant which may be in intermittent use shall be shut down between work periods or shall be throttled down to a minimum.

·         Plant known to emit noise strongly in one direction, shall, where possible, be orientated so that the noise is directed away from the southern and western end of site boundary.

·         Silencer or mufflers on construction equipment shall be utilized and shall be properly maintained during the construction period.

·         Mobile plant (such as generator) shall be sited as far away from the southern and western end of site boundary as possible.

·         Material stockpiles and other structures shall be effectively utilized, where practicable, to screen noise from on-site construction activities.

Whole site/ Construction Phase

Contractor

 

ü

 

 

 

 

S7a.8.3.2 to S7a.8.3.4, and S7a.8.3.7

Measures to create pond habitat for Little Grebe

·         Permanent water pond with a size of about 1 ha for Little Grebe shall be constructed at western side of the IWMF Project site at the early stage of construction phase. 

·         The water depth shall be maintained between 0.8 m to 1.5 m. 

·         Consistent water source shall be secured.

·         Appropriate type and species of aquatic plants shall be planted to provide sustainable supply of food for Little Grebes.

·         The water quality of the pond shall be maintained for the growth of the aquatic plants and associated wildlife including Little Grebe’s food sources.

·         Emergent vegetation shall be planted to provide habitats for amphibian and dragonflies. 

·         The slope of pond bund shall be profiled to provide gentle gradient from about 1:4 to 1:6 to facilitate the growth of emergent plants. 

·         To screen out the breeding population from disturbance due to nearby traffic, native vegetation shall be planted at the boundary of the pond as appropriate, and boundary walls planted with climbers shall be set up between the recreated pond and the access road. 

·         Floating raft with special  design for the breeding requirement of Little Grebe shall be installed to enhance its breeding habitat.

·         Prior to the construction of the pond(s), a Habitat Creation and Management Plan (HCMP) of the created pond prepared by experienced ecologist possesses at least a Bachelor’s degree in relevant discipline and at least 7 years relevant professional experience.  The HCMP shall be circulated to relevant departments including AFCD. 

Within Project Site/ Design, Construction and Operation Phases

IWMF design team/ contractor/ IWMF operator

ü

 

ü

 

ü

 

 

 

S7a.8.3.5 to S7a.8.3.6 and S7a.8.3.7

Measures to enhance the southern unoccupied Middle Lagoon portion

·        The southern unoccupied Middle Lagoon portion with a size of 4.5 ha shall be maintained as an enhanced wetland habitat.

·        No PFA filling activities shall be allowed.

·        Freshwater source to the enhanced wetland habitat shall be secured, and the water level of the enhanced wetland habitat shall be regulated to provide a more stable wetland area.

·        Floating raft with special design suiting with Little Grebe’s breeding requirement shall be installed.

·        Prior to the habitat enhancement work, a Habitat Creation and Management Plan (HCMP) of the enhanced wetland habitat prepared by experienced ecologist possesses at least a Bachelor’s degree in relevant discipline and at least 7 years relevant professional experience.  The HCMP shall be circulated to relevant departments including AFCD. 

Within southern unoccupied Middle Lagoon / Design, Construction and Operation Phases

IWMF design team/ contractor/ IWMF operator

ü

 

ü

 

ü

 

 

 

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.5                Implementation Schedule for Health Impact Measures for the IWMF at the TTAL site

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S9a.5.6

Human Health Risk Associated with Radon

Prevention of Radon Influx from PFA to the IWMF Buildings

·        A soil cover can be provided beneath the buildings on top of ash lagoon prior to construction works because it reduces the level of radon influx significantly

·       Slab-on-grade can be an option on foundation design

·       Soil suction can also prevent radon from entering the building by drawing the radon from below the building and venting it through a pipe, or pipes, to the air above the building.

Provision of Sufficient Ventilation of Interior of IWMF Buildings

·       Forced and natural ventilation should be introduced properly to enhance air exchange rate in the IWMF buildings.

·       Basement areas should be pressurized by using a fan to blow air into the basement areas from outdoors is suggested.  This would create enough pressure at the lowest level indoors to prevent radon from entering into the IWMF buildings.

 Regular Maintenance for Floor Slabs and Walls

·       Cracks and other openings in the foundation should be properly sealed to reduce radon ingress.

·       Sealing the cracks limits the flow of radon into the building thereby making other radon reduction techniques more effective and cost-efficient.  It also reduces the loss of conditioned air.

 

Radon Concentration Measurement Prior to Occupation of  IWMF Buildings

·       Radon concentration shall be measured by professional persons in accordance with EPD’s ProPECC Note PN 1/99 Control of Radon Concentration in New Buildings Appendix 2, ”Protocol of Radon Measurement for Non-residential Building” to ensure the radon concentration is in compliance with the guidance value.

 

IWMF buildings / During the design, construction and operation of the IWMF.

 

 

Contractor / IWMF Operator

 

ü

 

ü

 

ü

 

 

EPD’s ProPECC Note PN 1/99 Control of Radon Concentration in New Buildings Appendix 2

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.6                Implementation Schedule for Landscape and Visual Measures for TTAL Site

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S10a.10

MLVC- 01

Grass-hydroseeded bare soil surface.

Work site /  During construction phase

Contractor

 

ü

 

 

 

S10a.10

MLVC-02

Provision of Water Pond as Habitat for Little Grebe

A compensatory habitat for Little Grebe will be provided as an ecological mitigation measure for the loss of habitat within the project site. This compensatory habitat, which would be a landscape area with water pond and plants, is also considered as a landscape mitigation measure for the loss of ash lagoon. The final design of the habitat will be determined in the Habitat Creation and Management Plan.  

Work site /  During design & construction phases

Contractor

ü

ü

 

 

 

S10a.10

MLVC-03

Existing Trees Preservation within Works Areas

No trees should be felled or transplanted unless they are inevitably affected by the proposed works. Affected trees should be transplanted under circumstance where technically feasible. A tree survey report should be prepared and a tree felling application should be submitted to Government during the detailed design stage for approval before the site formation works commence. The numbers, locations, species and sizes of the trees to be transplanted or felled should be clearly addressed. All existing trees within work sites shall be properly maintained and protected for their crowns, trunks and roots.

Work site /  During construction phase

Contractor

 

ü

 

 

 

S10a.10

MLVC-04

Transplanting of Trees to Adjacent Locations

The existing trees recommended to be transplanted shall be directly transplanted to other locations in vicinity where no construction will take place.

The construction programme should also allow sufficient time for root pruning and rootball preparation prior to transplanting.

Work site /  During construction phase

Contractor

 

ü

 

 

 

S10a.10

MLVC-05

Compensatory Landscape Planting

Implementation of compensatory planting with heavy standard trees shall be of a ratio not less than 1:1 according to tree quantity and total tree trunk diameter lost.

Work site /  During construction phase

Contractor

 

ü

 

 

ETWB TCW 3/2006

S10a.10

MLVC-06

Landscape Design

1)       Early planting using fast grow trees and tall shrubs at strategic locations within site will be implemented to block view corridors to the site from the VSRs, and to locally screen haul roads, excavation works and site preparation works.

2)       Tree species of dense tree crown will be used to serve as visual barrier.

3)       Hard and soft landscape treatment (e.g. trees and shrubs) of open areas within development will be implemented to provide shade and shelter and a green appearance from surrounding viewpoints.

4)       Planting strip would be provided along the periphery of the project site.

5)       Selected plant species should be suitable for coastal condition.

Work site /  During design & construction phases

Contractor

ü

ü

 

 

 

S10a.10

MLVC-07

Reuse Existing Boulders

Boulders cleared from the ash lagoon during site formation will be reserved and used as part of the landscape design to preserve its “natural look”.

Work site /  During construction phase

Contractor

 

ü

 

 

 

S10a.10

MLVC-08

Greening Design (Rooftop & Vertical Greening)

1)       Rooftop and vertical greening (vertical building envelope) shall be implemented to increase the amenity value of the proposed works, moderate temperature extremes and enhance building energy performance, as well as visually improve the development.

2)       Vertical greening shall be implemented for the lower portion of chimney (~20-25m high).

Structures in IWMF  /  During design & construction phases

Contractor

ü

ü

 

 

 

S10a.10

MVC-01

Visual Mitigation and Aesthetic Design

1)       Recessive colour tone is proposed for the façade of the ancillary facility buildings (e.g. incinerator plant) to blend in with the nature.

2)       Architectural feature (e.g. light weight aluminum structure) is incorporated with the tapered chimney of recessive colour tone to diminish its “chimney like” appearance.

3)       Stone as a natural material is proposed at the lower portion of the building façade and the chimney to compliment with the surrounding environment.

4)       Change of material at different portions of the building helps to reduce the bulkiness.

5)       Green roof structure (with irrigation and drainage system) in curvilinear strips is proposed to cover the rectilinear building bulk. Roof strips of different curvatures are further broken down to echo with the contour of the hillside slope behind.

Structures in IWMF /  During design & construction phases

Contractor

ü

ü

 

 

 

S10a.10

MVC-02

Security floodlight for construction areas shall be controlled at night to avoid excessive glare to the surrounding receiver.

Work site / During construction phase

Contractor

 

ü

 

 

 

S10a.10

MVC-03

The construction sequence and construction programme shall be optimized in order to minimize the duration of impact.

Work site / During design & construction phases

Contractor

ü

ü

 

 

 

S10a.10

MVC-04

The backfilling materials for site formation & construction materials / wastes on site shall be stored at a maximum height of 2m and covered with an impermeable material of visually un-obtrusive material (in earth tone).

Work site / During construction phase

Contractor

 

ü

 

 

 

S10a.10

MVC-05

The number of construction traffic to / from the project site shall be maintained to practical minimum.

Work site / During construction phase

Contractor

 

ü

 

 

 

S10a.10

MLO-01

Planting Maintenance

Proper planting maintenance and replacement of defective plant species on the new planting areas to enhance aesthetic and landscape quality shall be provided.

Project site / During Operation phase

Contractor

 

 

ü

 

 

S10a.10

MVO-01

Environmental Education Centre to Promote Waste Reduction

An Environmental Education Center, in which regular exhibitions and lectures to promote environmental awareness and waste reduction concept would be provided, shall be developed as a part of the IWMF for the general public to alleviate negative public perceptions of the development.

Project site / During Operation phase

Contractor

 

 

ü

 

 

S10a.10

MVO-02

Control of Light

The numbers of lights and their intensity shall be controlled to a level good enough to meet the safety requirements at night but not excessive.

Project site / During Operation phase

Contractor

 

 

ü

 

 

S10a.10

MVO-03

Control of Operation Time

The frequency of waste transportation shall be minimized to practical minimum (e.g. limit the reception of MSW from 8 am to 8 pm).

Project site / During Operation phase

Contractor

 

 

ü

 

 

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

 

Table 14.7                Implementation Schedule for Landfill Gas Measures for the IWMF at the TTAL site

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S12a.8.3.3

Keep abreast of the works programme of the WENT Landfill Extensions

·       IWMF DBO contractor shall  keep abreast of the works programme of the WENT Landfill Extensions project and liaise with the Contractor of WENT Landfill Extension project as necessary to make sure that the landfill gas (LFG) cut-off trench barrier along the boundary will be completed in a timely manner.

Work Site / During the design, construction and operation phase

Contractor

ü

ü

ü

 

 

S12a.8.2.1

Appointment of Safety Officer

·       Appoint a properly trained safety officer and provide with appropriate equipment to measure and monitor LFG hazard.  The monitoring frequency and areas to be monitored should be set down prior to commencement of ground-works either by the Safety Officer or an approved and appropriately qualified person.

Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.2 ~ S12a.8.2.3

Safety Measures - Excavation

·       Staff should receive appropriate training on working in areas susceptible to landfill gas, fire and explosion hazards.  Excavation procedures and code of practice should be implemented.

Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.5 ~ S12a.8.2.7

Safety Measures – Welding, Flame-Cutting and Hot works

·       Hot works should be confined to open areas away from any trench or excavation.  Should hot works must be carried out in trenches or confined space, “permit to work” procedures should be followed.

Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.8 ~ S12a.8.2.9

Safety Measures – Enclosed Spaces

·       Site offices or buildings located within future WENT Landfill extensions Consultation Zone which have the capacity to accumulate landfill gas, then they should either be located in an area which has been proven to be free of landfill gas; or be raised clear of the ground by a minimum of 500mm.

Enclosed Spaces within future WENT Landfill extensions Consultant Zone / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.10

Safety Measures – Electrical Equipment

·       Any electrical equipment, such as motors and extension cords, should be intrinsically safe.

Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.11

Safety Measures – Piping

·       During piping assembly or conduiting construction, all valves/seals should be closed immediately after installation.  As construction progresses, all valves/seals should be closed as installed to prevent the migration of gases through the pipeline/conduit.  All piping/conduiting should be capped at the end of each working day.

Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.12 ~ S12a.8.2.14

Safety Measures – Fire Safety

·       Adequate fire safety equipments should be provided on site.  Workers and visitors should be notified of the potential fire hazards.  Safety notices should be posted around the site warning the anger and potential hazards.

Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.15

Safety Measures – Confined Spaces

·       Precautionary measures should include ensuring that staff members are aware of the potential hazards of working in confined spaces, and that appropriate monitoring procedures are in place to prevent hazards in confined spaces.

Confined Spaces at Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.2.16 ~ S12a.8.2.21

Monitoring

·       Periodically during ground-works within the Consultation Zone, the works area should be monitored for methane, carbon dioxide and oxygen using appropriately calibrated portable gas detection equipment.  The monitoring frequency and areas to be monitored shall be set down prior to commencement of ground-works.  Depending on the results of the measurements, actions required will vary. As a minimum these should encompass those actions specified in Table 12a.6 of the EIA Report.

Work Site / During the construction phase

Contractor

 

ü

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

S12a.8.3.3 ~ S12a.8.3.4

Gas Barrier

·       It is proposed that landfill gas cut-off trench barrier will be built along the boundary between the proposed IWMF and the WENT Landfill Extensions under the WENT Landfill Extensions project.  This will cut off any gas migration to the IWMF from the WENT Landfill Extensions.

·       It is also recommended that several landfill gas monitoring wells be installed into the ground on the development side of the gas barrier.  These are used to measure the concentrations of methane and carbon dioxide within the ground and hence determine the effectiveness of the measures in preventing LFG migration.

IWMF & WENT Landfill Extensions interface / During operation phase of IWMF and design phase of WENT Landfill Extensions

WENT Landfill Extension designer (Gas Barrier)

 

IWMF Operator (Monitoring)

ü

 

ü

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

 

S12a.8.3.5 ~ S12a.8.3.7

Building Protection Design Measures

·       Passive control measures (e.g. gas-resistant polymeric membrane, building materials resistant to gas permeation, clear void under structure, etc) for buildings structures with ground level or below ground rooms / voids.

·       Active control measures (e.g. clear void with mechanical ventilation under structure, gas extraction pipe, positive pressure zone under / within structure, etc), should be employed where the rates of gas emission are too high to rely on passive ventilation or in particular circumstances where, for example, there is a sensitive target to protect.

·       It is also recommended to install gas detection sensors at appropriate positions within a structure where gas has the potential to accumulate, e.g. near service entries, inside ventilation basements, cupboards or ducts.

IWMF building structures / During design stage

IWMF designer

ü

 

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

 

S12a.8.3.11

Design Measures for Sub-Surface Building Services

·       Protection measures (such as barriers made of HDPE, vent pipes, etc) for the design measures for sub-surface building services.

IWMF building services / During design stage

IWMF designer

ü

 

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

 

S12a.8.3.12 ~ S12a.8.3.14

Guidance for Entry into Service Rooms / Voids, Manholes and Chamber

·       Safety Guide to Working in Confined Spaces should be followed to ensure compliance with the Factories and Industrial Undertakings (Confined Spaces) Regulation.

·       In general, appropriate safety equipments should be available for works in confined spaces. Workers and Supervisors should be trained. A permit-to-work system for entry should be developed and consistently employed. The safety measures recommended in Chapter 8 of the Landfill Gas Hazard Assessment Guidance Note should also be strictly followed.

Service rooms, voids, manholes and chambers / During operation stage

IWMF operator

 

 

ü

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

 

S12a.8.3.15

Landfill Gas Monitoring

·       Regular Monitoring of landfill gas should be done at the monitoring wells, as well as at the underground service voids and manholes by the IWMF contractor.  Monitoring would be required to verify the effectiveness and to ensure the continued performance of the implemented protection measures.

Monitoring wells, service rooms, voids, manholes and chambers / During operation stage

IWMF operator

 

 

ü

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

 

S12a.8.3.16 ~ S12a.8.3.17

Design of LFG Protection Measures

·       When the detailed design of the IWMF is available, the Design-Build-Operate (DBO) contractor of the IWMF is required to undertake further landfill gas hazard assessment to take account of the more readily available detailed information to finalize the design of the landfill gas protection measures recommended in this report.  During the detailed design stage, a review of this preliminary qualitative risk assessment should be carried out and a detailed qualitative landfill gas risk assessment as described in section 1.15 and chapter 6 of the Landfill Gas Hazard Assessment Guidance Note should be prepared.  The detailed qualitative landfill gas risk assessment together with the detailed design of gas protection measures and a landfill gas monitoring programme should be submitted to EPD for vetting.

·       The design of the landfill gas precautionary measures to be adopted on-site should be performed by a competent professional person who has knowledge on LFG protection measures appointed by the DBO contractor of the IWMF.  The design should also be checked and certified by a qualified independent consultant.  The DBO contractor should ensure that the required protection measures are implemented and constructed in accordance with the design and a maintenance and monitoring programme should be established to ensure the continued performance of the implemented protection measures.  The above requirements should be included in the tender documents of the IWMF.

Entire Site/During design stage

Project proponent & IWMF designer

ü

 

 

 

LFG Hazard Assessment Guidance Note (EPD/TR8/97)

 

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

 

14.2                     The IWMF at the artificial island near SKC

Table 14.8                Implementation Schedule for Air Quality Measures for the IWMF at the artificial island near SKC

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S3b.8.1

Air Pollution Control (Construction Dust) Regulation & Good Site Practices

·       Use of regular watering, with complete coverage, to reduce dust emissions from exposed site surfaces and unpaved roads, particularly during dry weather.

·       Use of frequent watering for particularly dusty construction areas and areas close to ASRs.

·       Side enclosure and covering of any aggregate or dusty material storage piles to reduce emissions.  Where this is not practicable owing to frequent usage, watering shall be applied to aggregate fines.

·       Open stockpiles shall be avoided or covered.  Where possible, prevent placing dusty material storage piles near ASRs.

·       Tarpaulin covering of all dusty vehicle loads transported to, from and between site locations.

·       Establishment and use of vehicle wheel and body washing facilities at the exit points of the site.

·       Provision of wind shield and dust extraction units or similar dust mitigation measures at the loading points, and use of water sprinklers at the loading area where dust generation is likely during the loading process of loose material, particularly in dry seasons/ periods.

·       Imposition of speed controls for vehicles on unpaved site roads.  Ten kilometers per hour is the recommended limit.

·       Where possible, routing of vehicles and positioning of construction plant should be at the maximum possible distance from ASRs.

·       Instigation of an environmental monitoring and auditing program to monitor the construction process in order to enforce controls and modify method of work if dusty conditions arise.

Work site / During the construction period

Contractor

 

ü

 

 

Air Pollution Control (Construction Dust) Regulation

S3b.6.3

Odour Removal by Deodorizers

·       Deodorizers with 95% odour removal efficiency would be installed for the air ventilated from the mechanical treatment plant before discharge to the atmosphere

Waste reception halls, the waste storage area, the mechanical treatment plant / During design & operation phase

IWMF Operator

ü

 

ü

 

EIAO-TM

S3b.8.2

Air Pollution Control and Stack Monitoring

·       Air pollution control and stack monitoring system will be installed for the IWMF to ensure that the emissions from the IWMF stack will meet the proposed target emission limits.

IWMF stack emissions / During design & operation phase

IWMF Operator

ü

 

ü

 

EIAO-TM

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.9                Implementation Schedule for Noise Impact Measures for the IWMF at the artificial island near SKC

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S4b.8

Good site practices to limit noise emissions at source and

use of quiet plant and working methods, whenever practicable.

Work Sites / Construction Period

EPD and its contractors

 

ü

 

 

EIAO-TM

S4b.6

& S4b.8

All the ventilation fans installed in the below will be provided with silencers or acoustics treatment.

(i)         Stack of the incinerator

(ii)       Ventilation systems within the IWMF

Enclosure and discharge silencer or other acoustic treatment equipment should be installed in the air-cooled chillers

 

Other than provision of silencer or other acoustic treatment equipment for the stack of the incinerator and ventilation system, the detailed design should incorporate the following good practice in order to minimise the nuisance on the neighbouring NSRs.

(i)         The exhaust of the ventilation system and any opening of the building should be located facing away from any NSRs; and

(ii)       Louver or other acoustic treatment equipment could also be applied to the exhaust of the ventilation system.

Within IWMF area / Construction Period

EPD and its contractors

ü

 

ü

 

EIAO-TM

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.10            Implementation Schedule for Water Quality Measures for the Artificial Island near SKC

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S5b.8.1.1

Drainage and Construction Site Runoff

The site practices outlined in ProPECC PN 1/94 “Construction Site Drainage” should be followed as far as practicable in order to minimise surface runoff and the chance of erosion.  These practices include the following items:

·       At the start of site establishment, perimeter cut-off drains to direct off-site water around the site should be constructed with internal drainage works and erosion and sedimentation control facilities implemented.  Channels (both temporary and permanent drainage pipes and culverts), earth bunds or sand bag barriers should be provided on site to direct storm water to silt removal facilities.  The design of the temporary on-site drainage system will be undertaken by the contractor prior to the commencement of construction.

·       Boundaries of earthworks should be surrounded by dykes or embankments for flood protection, as necessary.

·       Sand/silt removal facilities such as sand/silt traps and sediment basins should be provided to remove sand/silt particles from runoff to meet the requirements of the TM-DSS.  The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94, which states that the retention time for silt/sand traps should be 5 minutes under maximum flow conditions.  The detailed design of the sand/silt traps shall be undertaken by the contractor prior to the commencement of construction.

·       Water pumped out from foundation piles must be discharged into silt removal facilities.

·       Measures should be taken to minimize the ingress of site runoff and drainage into excavations.  Drainage water pumped out from excavations should be discharged into storm drains via silt removal facilities.

·       During rainstorms, exposed slope/soil surfaces should be covered by a tarpaulin or other means, as far as practicable.  Other measures that need to be implemented before, during and after rainstorms are summarized in ProPECC PN 1/94.

·       Exposed soil areas should be minimized to reduce potential for increased siltation and contamination of runoff.

·       Earthwork final surfaces should be well compacted and subsequent permanent work or surface protection should be immediately performed.

·       Open stockpiles of construction materials or construction wastes on-site should be covered with tarpaulin or similar fabric during rainstorms.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5b.8.1.2

General Construction Activities

Construction solid waste should be collected, handled and disposed of properly to avoid entering to the nearby watercourses and public drainage system.  Rubbish and litter from construction sites should also be collected to prevent spreading of rubbish and litter from the site area.  It is recommended to clean the construction sites on a regular basis.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5b.8.1.3

There is a need to apply to EPD for a discharge licence for discharge of effluent from the construction site under the WPCO. The discharge quality must meet the requirements specified in the discharge licence. All the run-off and wastewater generated from the works areas should be treated so that it satisfies all the standards listed in the TM-DSS. The beneficial uses of the treated effluent for other on-site activities such as dust suppression and general cleaning etc., can minimise water consumption and reduce the effluent discharge volume. If monitoring of the treated effluent quality from the works areas is required during the construction phase of the Project, the monitoring should be carried out in accordance with the relevant WPCO licence which is under the ambit of regional office of EPD.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5b.8.1.4

Accidental Spillage

Contractor must register as a chemical waste producer if chemical wastes would be produced from construction activities.  The Waste Disposal Ordinance (Cap 354) and its subsidiary regulations in particular the Waste Disposal (Chemical Waste) (General) Regulation should be observed and complied with for control of chemical wastes.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5b.8.1.5

Maintenance of vehicles and equipments involving activities with potential for leakage and spillage should only be undertaken within the areas which appropriately equipped to control these discharges.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5b.8.1.6

Oils and fuels should only be used and stored in designated areas which have pollution prevention facilities.  All fuel tanks and storage areas should be sited on sealed areas in order to prevent spillage of fuels and solvents to the nearby watercourses.  All waste oils and fuels should be collected in designated tanks prior to disposal.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5b.8.1.7

Disposal of chemical wastes should be carried out in compliance with the Waste Disposal Ordinance.  The Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes published under the Waste Disposal Ordinance details the requirements to deal with chemical wastes.  General requirements are given as follows:

·       Suitable containers should be used to hold the chemical wastes to avoid leakage or spillage during storage, handling and transport.

·       Chemical waste containers should be suitably labelled, to notify and warn the personnel who are handling the wastes, to avoid accidents.

·       Storage area should be selected at a safe location on site and adequate space should be allocated to the storage area.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO; WDO

S5b.8.1.8

Sewage Effluent

Temporary sanitary facilities, such as portable chemical toilets, should be employed on-site where necessary to handle sewage from the workforce.  A licensed contractor would be responsible for appropriate disposal and maintenance of these facilities.

Work site / During the construction period

Contractor

 

ü

 

 

EIAO-TM; ProPECC PN 1/94; WPCO

S5b.8.1.9

Reclamation and Construction of Breakwaters

·       The proposed dredging and reclamation should be commenced in phases. The breakwaters and seawalls should be constructed using cofferdam method and the reclamation should be started within the enclosed breakwaters after the completion of the breakwater. Silt curtain should be used to surround the circular cell during the filling of the cell to prevent the loss of fine in the filling material

·       Water trapped inside the cofferdam, if any, would be pumped out for treatment before discharge.

·       The maximum production rate for dredging for the anti-scouring protection layer shall not exceed 380 m3 per day. It is recommended to employ closed grab with small capacity of 2 m3 to control the dredging rate. No dredging works would be carried out within 100 m from the nearest coral community.

·       Any gap that may need to be provided for marine access will be located at the middle of the North Western seawall, away from the identified coral communities and will be shielded by silt curtains systems to control sediment plume dispersion.

·       The silt curtain system at marine access opening should be closed as soon as the barges passes through the marine access opening in order to minimize the period of curtain opening. Filling should only be carried out behind the silt curtain when the silt curtain is completely closed.

·       To enhance the effectiveness of the silt curtain at the marine access, the northern breakwater would be built before the commencement of the reclamation to reduce the current velocity towards the marine access opening.

·       The silt curtain system at marine access opening should be regularly checked and maintained to ensure proper functioning.

·       Where public fill is proposed for filling below +2.5mPD, the fine content in the public fill will be controlled to 25% which is in line with the CEDD’s General Specification;

·       The filling for reclamation should be carried out behind the seawall. The filling material should only consist of public fill, rock and sand. The maximum filling rate for filling below high watermark (+2.5 mPD) for sand should be 4000 m3/day. The maximum filling rate for filling below high watermark for public fill should be 300 m3/day. The maximum total filling rate for filling below high watermark should be 7000 m3/day. The filling above high watermark is not restricted;

·       For dredging for anti-scouring protection layer, the contractor should follow the production rate and the maximum number of grab per hour  stated in section 5;

·       No dredging should be carried out within 100 m to the nearest non-translocatable coral community;

·       Daily site audit including full-time on-site monitoring by the ET is recommended during the dredging for anti-scouring protection layer for checking the compliance with the permitted no. of grab;

·       Closed grab dredger should be used to minimize the loss of sediment during the raising of the loaded grabs through the water column;

·       Frame-type silt curtains should be deployed around the dredging operations;

·       Floating-type silt curtains should be used to surround the circular cell during the sheetpiling work;

·       The descent speed of grabs should be controlled to minimize the seabed impact speed;

·       Barges should be loaded carefully to avoid splashing of material;

·       All barges used for the transport of dredged materials should be fitted with tight bottom seals in order to prevent leakage of material during loading and transport;

·       No concurrence works between laying of submarine cables and dredging/reclamation works within the same location is allowed. For works close to each other, the construction program should be arranged so that the dredging/reclamation works within area bounded by the breakwaters and the laying of cables would not operate within a distance of 80m from each other to avoid any accumulative impact on the environment (in case if such tight schedule is necessary).

·       All barges should be filled to a level which ensures that material does not spill over during loading and transport to the disposal site and that adequate freeboard is maintained to ensure that the decks are not washed by wave action.

Work site / During the marine construction period

Contractor

 

ü

 

 

EIAO-TM; WPCO

S5b.8.2.3

Operational Phase Discharges

A pipeline drainage system will serve the development area collecting surface runoff from paved areas, roof, etc.  Sustainable drainage principle would be adopted in the drainage system design to minimize peak surface runoff, maximize permeable surface and maximize beneficial use of rainwater.

Within IWMF site / During the operational phase

IWMF Operator

ü

 

ü

 

WPCO

S5b.8.2.4

Oil interceptors should be provided in the drainage system of any potentially contaminated areas (such as truck parking area and maintenance workshop) and regularly cleaned to prevent the release of oil products into the storm water drainage system in case of accidental spillages. Accidental spillage should be cleaned up as soon as practicable and all waste oils and fuels should be collected and handled in compliance with the Waste Disposal Ordinance.

Within IWMF site / During the operational phase

IWMF Operator

ü

 

ü

 

WPCO; WDO

S5b.8.2.5

Refuse Entrapment

Collection and removal of floating refuse should be performed at regular intervals for keeping the water within the Project site boundary and the neighbouring water free from rubbish.

Within the Project site / During the operational phase

IWMF Operator

 

 

ü

 

WPCO

S5b.8.2.6

Transportation of bottom ash, fly ash and APC residues to WENT Landfill for disposal

Covered container should be used in the shipping of the incineration waste to limit the contact between the incineration waste and the marine water. A comprehensive emergency response plan for any accidental spillage should be submitted by the operation contractor to the EPD for agreement before the operation of the facilities. Salvage and cleanup action to recover the spilled incineration waste containers following the spillage should be carried out according to the emergency response plan to mitigate the environmental impact in case of spillage.

Transportation of

Incineration Ash

/ During the operational phase

IWMF Operator

 

 

ü

 

 

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.11            Implementation Schedule for Waste Quality Measures for the IWMF at the artificial island near SKC

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

6b.5.1.2

Good Site Practices

Adverse environmental impacts in relation to waste management are not expected, provided that good site practices are strictly followed. Recommendations for good site practices during the construction activities would include:

·       Obtain relevant waste disposal permits from appropriate authorities, in accordance with the Waste Disposal Ordinance (Cap. 354) and subsidiary Regulations and the Land (Miscellaneous Provisions) Ordinance (Cap. 28);

·       Provide staff training for proper waste management and chemical handling procedures;

·       Provide sufficient waste disposal points and regular waste collection;

·       Provide appropriate measures to minimise windblown litter and dust during transportation of waste by either covering trucks or by transporting wastes in enclosed containers; and

·       Carry out regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

·       Separate chemical wastes for special handling and disposed of to licensed facility for treatment; and

·       Employ licensed waste collector to collect waste.

 

Work Site/ During Construction Period

Contractor

 

ü

 

 

WDO; LDO; ETWB TCW No. 19/2005; EIAO-TM

6b.5.1.3

Waste Reduction Measures

Good management and control can prevent the generation of a significant amount of waste. Waste reduction is best achieved at the planning and design stage, as well as by ensuring the implementation of good site practices. Recommendations to achieve waste reduction include:

·       Design foundation works that could minimise the amount of excavated material to be generated.

·       Provide training to workers on the importance of site cleanliness and appropriate waste management procedures, including waste reduction, reuse and recycling;

·       Sort out demolition debris and excavated materials from demolition works to recover reuseable/recyclable portions (i.e. soil, broken concrete, metal etc.);

·       Segregate and store different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal;

·       Encourage the collection of aluminium cans by providing separate labelled bins to enable this waste to be segregated from other general refuse generated by the work force;

·       Proper storage and site practices to minimise the potential for damage or contamination of construction materials; and

·       Plan and stock construction materials carefully to minimise amount of waste to be generated and to avoid unnecessary generation of waste.

 

Work Site/ During Design & Construction Period

Contractor

ü

ü

 

 

 

6b.5.1.7

Dredged Sediment – Application of Dumping Permit

The project proponent should agree in advance with MFC of CEDD on the site allocation.  The project proponent or contractor for the dredging works shall then apply for the site allocations of marine sediment disposal based on the prior agreement with MFC/CEDD.  The project proponent or contractor should also be responsible for the application of all necessary permits from relevant authorities, including the dumping permit as required under DASO from EPD, for the disposal of dredged sediment prior to the commencement of the dredging works.

 

Seawall and Reclamation site / Construction Period

EPD and its contractor

ü

ü

 

 

DASO

ETWB TCW 34/2002

6b.5.1.8

Dredged Sediment – Sediment Quality Report

The project proponent or contractor will need to satisfy the appropriate authorities that the quality of the marine sediment to be dredged has been identified according to the requirements of ETWB TCW 34/2002.  This should be completed well before the dredging works and would include at least the submission of a formal Sediment Quality Report under Tier I of ETWB TCW No. 34/2002 to DEP for approval.  Subject to advice from DEP, it is possible that further marine SI in accordance with ETWB TCW 34/2002 might be necessary for the application of dumping permit under DASO.  In such case, a sediment sampling and testing proposal shall be submitted to and approved by DEP before the additional marine SI works.

 

Seawall and Reclamation site / Construction Period

EPD and its contractor

ü

 

 

 

DASO

ETWB TCW 34/2002

6b.5.1.9

Dredged Sediment – Sediment Transportation

The barge transporting the sediments to the designated disposal sites should be equipped with tight fitting seals to prevent leakage and should not be filled to a level that would cause overflow of materials or laden water during loading or transportation.  In addition, monitoring of the barge loading shall be conducted to ensure that loss of material does not take place during transportation.  Transport barges or vessels shall be equipped with automatic self-monitoring devices as specified by the DEP.

 

Seawall and Reclamation site / Construction Period

EPD and its contractor

 

ü

 

 

DASO

ETWB TCW 34/2002

6b.5.1.10

Construction and Demolition Materials

In order to minimise the impact resulting from collection and transportation of C&D materials for off-site disposal, the excavated material arising from site formation and foundation works should be reused on-site as backfilling material and for landscaping works as far as practicable. Other mitigation requirements are listed below:

·       A Waste Management Plan (WMP), which becomes part of the Environmental Management Plan (EMP), should be prepared in accordance with ETWB TCW No.19/2005;

·       A recording system for the amount of wastes generated, recycled and disposed (including the disposal sites) should be adopted for easy tracking; and

·       In order to monitor the disposal of C&D materials at public filling facilities and landfills and to control fly-tipping, a trip-ticket system should be adopted (refer to ETWB TCW No. 31/2004).

Work Site/ During Design & Construction Period

Contractor

ü

ü

 

 

ETWB TCW No. 19/2005

6b.5.1.11 – 6b.5.1.12

The Contactor should prepare and implement an EMP in accordance with ETWB TCW No.19/2005, which describes the arrangements for avoidance, reuse, recovery, recycling, storage, collection, treatment and disposal of different categories of waste to be generated from construction activities.  Such a management plan should incorporate site specific factors, such as the designation of areas for segregation and temporary storage of reusable and recyclable materials.  The EMP should be submitted to the Engineer for approval.  The Contractor should implement waste management practices in the EMP throughout the construction stage of the Project.  The EMP should be reviewed regularly and updated by the Contractor, preferably on a monthly basis.

 

All surplus C&D materials arising from or in connection with construction works should become the property of the Contractor when it is removed unless otherwise stated.  The Contractor would be responsible for devising a system to work for on-site sorting of C&D materials and promptly removing all sorted and process materials arising from the construction activities to minimize temporary stockpiling on-site. The system should be included in the EMP identifying the source of generation, estimated quantity, arrangement for on-site sorting, collection, temporary storage areas and frequency of collection by recycling Contractors or frequency of removal off-site.

 

Work Site/ During Design & Construction Period

Contractor

ü

ü

 

 

ETWB TCW No. 19/2005

6b.5.1.13

Chemical Wastes

Should chemical wastes be produced at the construction site, the Contractor would be required to register with EPD as a Chemical Waste Producer and to follow the guidelines stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. Good quality containers compatible with the chemical wastes should be used, and incompatible chemicals should be stored separately. Appropriate labels should be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste (such as explosive, flammable, oxidizing, irritant, toxic, harmful, or corrosive). The Contractor should employ a licensed collector to transport and dispose of the chemical wastes, to either the Chemical Waste Treatment Centre at Tsing Yi, or another licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

 

Work Site/ During Construction Period

Contractor

 

ü

 

 

Waste Disposal (Chemical Waste) (General) Regulation

6b.5.1.14

General Refuse

General refuse should be stored in enclosed bins or compaction units separate from C&D materials. A licensed waste collector should be employed by the Contractor to remove general refuse from the site, separately from C&D materials. Preferably an enclosed and covered area should be provided to reduce the occurrence of ‘wind blown’ light material.

Work Site/ During Construction Period

Contractor

 

ü

 

 

Public Health and Municipal Services Ordinance

6b.5.1.16 – 6b.5.1.33

Biogas Generation

The Contractor shall review the data and analysis results, and the data from further Site Investigation, if any.  Subject to the review findings, the following gas protection measures may be considered if necessary:

- gas monitoring after reclamation;

- passive ventilation;

- gas impermeable membrane;

- ventillation with “at risk” rooms;

- protection of utilities or below ground services;

- precautions during construction works;

- precautions prior to entry of belowground services

Reclamation site (if dredging at the reclamation site is not required) / Design & Construction Period

Designer and/or contractor

ü

ü

 

 

EPD/TR8/97

6b.5.2.1

Good Site Practices

It is recommended that the following good operational practices should be adopted to minimise waste management impacts:

·               Obtain the necessary waste disposal permits from the appropriate authorities, in accordance with the Waste Disposal Ordinance (Cap. 354) and Waste Disposal (Chemical Waste) (General) Regulation;

·               Nomination of an approved person to be responsible for good site practice, arrangements for collection and effective disposal to an appropriate facility of all wastes generated at the site;

·               Use of a waste haulier licensed to collect specific category of waste;

·               A trip-ticket system should be included as one of the contractual requirements and implemented by the Environmental Team to monitor the disposal of solid wastes at landfills, and to control fly tipping. Reference should be made to ETWB TCW No. 31/2004.

·               Training of site personnel in proper waste management and chemical waste handling procedures;

·               Separation of chemical wastes for special handling and appropriate treatment at a licensed facility;

·               Routine cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

·               Provision of sufficient waste disposal points and regular collection for disposal;

·               Adoption of appropriate measures to minimize windblown litter and dust during transportation of waste, such as covering trucks or transporting wastes in enclosed containers; and

·               Implementation of a recording system for the amount of wastes generated, recycled and disposed of (including the disposal sites).

IWMF Site/During Operation Period

IWMF Operator

 

 

ü

 

Waste Disposal Ordinance (Cap. 354); Waste Disposal (Chemical Waste) (General) Regulation; ETWB TCW No. 31/2004

 

6b.5.2.2

Waste Reduction Measures

Good management and control can prevent the generation of significant amounts of waste. It is recommended that the following good operational practices should be adopted to ensure waste reduction:

·               Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal;

·               Encourage collection of aluminium cans, plastic bottles and packaging material (e.g. carton boxes) and office paper by individual collectors.  Separate labelled bins should be provided to help segregate this waste from other general refuse generated by the work force; and

·               Any unused chemicals or those with remaining functional capacity should be reused as far as practicable.

IWMF Site/ During Operation Period

IWMF Operator

 

 

ü

 

 

6b.5.2.3

Storage, Handling, Treatment, Collection and Disposal of Incineration By-Products

The following measures are recommended for the storage, handling and collection of the incineration by-products:

·               Ash should be stored in storage silos;

·               Ash should be handled and conveyed in closed systems fully segregated from the ambient environment;

·               Ash should be wetted with water to control fugitive dust, where necessary;

·               All fly ash and APC residues should be treated, e.g. by cement solidification or chemical stabilization, for compliance with the proposed Incineration Residue Pollution Control Limits and leachability criteria prior to disposal;

·               The ash should be transported in covered trucks or containers to the designated landfill site.

 

The Contractor should provide EPD with chemical analysis results of the bottom ash, and treated fly ash and APC residues to confirm that the ash/residue can comply with the proposed Incineration Residue Pollution Control Limits before disposal.

IWMF Site/ During Operation Period

IWMF Operator

 

 

ü

 

Incineration Residue Pollution Control Limits

6b.6.3.1

Fuel Oil Tank Construction and Test

·               The fuel tank to be installed should be of specified durability.

·               Double skin tanks are preferred.

·               Underground fuel storage tank should be placed within a concrete pit.

·               The concrete pit shall be accessible to allow regular tank integrity tests to be carried out at regular intervals.

·               Tank integrity tests should be conducted by an independent qualified surveyor or structural engineer.

·               Any potential problems identified in the test should be rectified as soon as possible.

Fuel Oil Storage

Tank/ During Design,

Construction and

Operation Periods

IWMF Contractor

ü

ü

ü

 

 

6b.6.3.1

Fuel Oil Pipeline Construction and Test

·               Installation of aboveground fuel oil pipelines is preferable; if underground pipelines are unavoidable, concrete lined trenches should be constructed to contain the pipelines.

·               Double skin pipelines are preferred.

·               Distance between the fuel oil refuelling points and the fuel oil storage tank shall be minimized.

·               Integrity tests for the pipelines should be conducted by an independent qualified surveyor or structural engineer at regular intervals.

·               Any potential problems identified in the test should be rectified as soon as possible.

Fuel Oil

Pipelines/ During Design,

Construction and

Operation Periods

IWMF Contractor

ü

ü

ü

 

 

6b.6.3.1

Fuel Oil Leakage Detection

·               Installation of leak detection device at storage tank and pipelines.

·               Installation and use of pressure gauges (e.g. at the two ends of a filling line) in fuel filling, which allows unexpected pressure drop or difference and sign of leakage to be detected.

Fuel Oil Storage

Tank and

Pipelines/ During Design,

Construction and

Operation Periods

IWMF Contractor

ü

ü

ü

 

 

6b.6.3.1

Fuel Oil Storage Tank Refuelling

·               Storage tank refuelling (from road tanker) should only be conducted by authorized staff of the oil company using the company’s standard procedures.

Fuel Oil

Refuelling Point/ During

Operation Period

IWMF Operator

 

 

ü

 

 

6b.6.3.1

Fuel Oil Spillage Response

An Oil Spill Response Plan should be prepared by the operator to document the appropriate response procedures for oil spillage incidents in detail. General procedures to be taken in case of fuel oil spillage are presented below.

·               Training

-      Training on oil spill response actions should be given to relevant staff. The training shall cover the followings:

Ø          Tools & resources to combat oil spillage and fire, e.g. locations of oil spill handling equipment and fire fighting equipment;

Ø          General methods to deal with oil spillage and fire incidents;

Ø          Procedures for emergency drills in the event of oil spills and fire; and

Ø          Regular drills shall be carried out.

·               Communication

-      Establish communication channel with the Fire Services Department (FSD) and EPD to report any oil spillage incident so that necessary assistance from relevant department can be quickly sought.

·               Response Procedures

-      Any fuel oil spillage within the IWMF site should be immediately reported to the Plant Manager with necessary details including location, source, possible cause and extent of the spillage.

-      Plant Manager should immediately attend to the spillage and initiate any appropriate action to confine and clean up the spillage. The response procedures shall include the following:

Ø          Identify and isolate the source of spillage as soon as possible.

Ø          Contain the oil spillage and avoid infiltration into soil/ groundwater and discharge to storm water channels.

Ø          Remove the oil spillage.

Ø          Clean up the contaminated area.

Ø          If the oil spillage occurs during storage tank refuelling, the refueling operation should immediately be stopped.

Ø          Recovered contaminated fuel oil and the associated material to remove the spilled oil should be considered as chemical waste. The handling and disposal procedures for chemical wastes are discussed in the following paragraphs.

IWMF Site/ During

Operation Period

IWMF Operator

 

 

ü

 

 

6b.6.3.2

Chemicals and Chemical Wastes Handling & Storage

·               Chemicals and chemical wastes should only be stored in suitable containers in purpose-built areas.

·               The storage of chemical wastes should comply with the requirements of the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

·               The storage areas for chemicals and chemical wastes shall have an impermeable floor or surface. The impermeable floor/ surface shall possess the following properties:

-      Not liable to chemically react with the materials and their containers to be stored.

-      Able to withstand normal loading and physical damage caused by container handling

-      The integrity and condition of the impermeable floor or surface should be inspected at regular intervals to ensure that it is satisfactorily maintained

Ø          For liquid chemicals and chemical wastes storage, the storage area should be bunded to contain at least 110% of the storage capacity of the largest containers or 20% of the total quantity of the chemicals/chemical wastes stored, whichever is the greater.

Ø          Storage containers shall be checked at regular intervals for their structural integrity and to ensure that the caps or fill points are tightly closed.

Ø          Chemical handling shall be conducted by trained workers under supervision.

Chemicals and

Chemical Wastes

Storage Area / During

Operation Period

IWMF Operator

 

 

ü

 

 

6b.6.3.2

Chemicals and Chemical Wastes Spillage Response

A Chemicals and/ or Chemical Wastes Spillage Response Plan shall be prepared by the operator to document in detail the appropriate response procedures for chemicals or chemical wastes spillage incidents. General procedures to be undertaken in case of chemicals/ chemical waste spillages are presented below.

·               Training

-      Training on spill response actions should be given to relevant staff. The training shall cover the followings:

Ø          Tools & resources to handle spillage, e.g. locations of spill handling equipment;

Ø          General methods to deal with spillage; and

Ø          Procedures for emergency drills in the event of spills.

·               Communication

-      Establish communication channel with FSD and EPD to report the spillage incident so that necessary assistance from relevant department can be quickly sought.

·               Response Procedures

-      Any spillage within the IWMF site should be reported to the Plant Manager.

-      Plant Manager shall attend to the spillage and initiate any appropriate actions needed to confine and clean up the spillage. The response procedures shall include the followings:

Ø          Identify and isolate the source of spillage as soon as possible;

Ø          Contain the spillage and avoid infiltration into soil/ groundwater and discharge to storm water channels (in case the spillage occurs at locations out of the designated storage areas);

Ø          Remove the spillage; the removal method/ procedures documented in the Material Safety Data Sheet (MSDS) of the chemicals spilled should be observed;

Ø          Clean up the contaminated area (in case the spillage occurs at locations out of the designated storage areas); and

Ø          The waste arising from the cleanup operation should be considered as chemical wastes.

IWMF Site/ During

Operation Period

IWMF Operator

 

 

ü

 

 

6b.6.3.3

Preventive Measures for Incineration By-products Handling

The recommended measures listed below can minimize the potential contamination to the surrounding environment due to the incineration by-products:

·               Ash should be stored in storage silos;

·               Ash should be handled and conveyed in closed systems fully segregated from the ambient environment;

·               Ash should be wetted with water to control fugitive dust, where necessary;

·               All fly ash and APC residues should be treated, e.g. by cement solidification or chemical stabilization, for compliance with the proposed Incineration Residue Pollution Control Limits and leachability criteria prior to disposal;

·               The ash should be transported in covered trucks or containers to the designated landfill site.

Storage, Handling

& Collection of

Incineration Ash

at IWMF/ During

Operation Period

IWMF Operator

 

 

ü

 

 

6b.6.3.4 - 6b.6.3.6

Incident Record

After any spillage, an incident report should be prepared by the Plant Manager. The incident report should contain details of the incident including the cause of the incident, the material spilled and estimated spillage amount, and also the response actions undertaken. The incident record should be kept carefully and able to be retrieved when necessary.

The incident report should provide sufficient details for the evaluation of any environmental impacts due to the spillage and assessment of the effectiveness of measures taken.

In case any spillage or accidents results in significant land contamination, EPD should be informed immediately and the IWMF operator should be responsible for the cleanup of the affected area.  The responses procedures described in Section 6b.6.3.1 and Section 6b.6.3.2 of EIA report should be followed accordingly together with the land contamination assessment and remediation guidelines stipulated in the Guidance Manual for Use of Risk-based Remediation Goals for Contaminated Land Management and the Guidance Note for Contaminated Land and Remediation.

IWMF Site/ During

Operation Period

IWMF Operator

 

 

ü

 

Guidance Manual for Use of Risk-based Remediation Goals for Contaminated Land Management and the Guidance Note for Contaminated Land and Remediation.

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.12            Implementation Schedule for Ecological Quality Measures for the IWMF at the artificial island near SKC

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

7b.8.2.1

Measures to avoid direct loss of intertidal habitat

·        The site boundary has been proposed to avoid direct contact with the intertidal natural rocky shore of Shek Kwu Chau.  It avoids direct loss of intertidal communities and the existing natural rocky shore habitat, where Reef Egret and White-bellied Sea Eagle have been recorded within and in the vicinity of this habitat. 

IWMF site

Design team

ü

 

 

 

EIAO-TM

7b.8.2.2

Measures to minimise loss of coastal subtidal habitat

 

·        Extensive coral colonies were recorded at the coastal hard bottom habitat at Shek Kwu Chau.  To avoid and minimise the extensive direct impact on the coral colonies, the proposed reclamation area has been moved further offshore to minimise loss of subtial habitat near shore.

IWMF site

Design team

ü

 

 

 

EIAO-TM

7b.8.2.3

Zero Discharge Scheme

 

·        The design scheme of the Project has avoided discharge of wastewater into the marine environment.  A zero discharge scheme would be adopted during the operation of the Project.  An on-site wastewater treatment plant would be provided to treat the wastewater generated from the IWMF (mainly human sewage).  The treated effluent would be re-used in the incineration plant and mechanical treatment plant, or for onsite washdown and landscape.

IWMF site

Design team, IWMF operator

ü

 

ü

 

WPCO

7b.8.2.4

Measures to avoid loss of plant species of conservation importance

 

·        Landing portal construction works would not cause direct lost to the recorded individual of protected plant species, Aquilaria sinensis, at the coastal shrubland habitat at Cheung Sha.  As a precautionary measure, the plant should be tagged with eye-catching tape and fenced off prior to works, in order to avoid any damage by workers.

Cheung Sha landing portal

Design team,  Contractor

ü

ü

 

ü

EIAO-TM

7b.8.3.1-7b.8.3.15

Measures to minimise water quality impact

 

·        Measures for water quality as recommended in Section 5b should be implemented.

Work site

Design team, contractor, IWMF operator

ü

ü

ü

ü

EIAO-TM; ProPECC PN 1/94; WPCO

7b.8.3.16-7b.8.3.30

Measures to minimise disturbance on Finless Porpoise

 

Minimisation of Habitat Loss for Finless Porpoise

·        Substantial revision has been made on the layout plan and form of the breakwater, in order to minimise the potential loss of important habitat for Finless Porpoise. The revision has greatly reduced the size of the embayment area, as well as the Project footprint. As a result, the size of habitat loss for Finless Porpoise has reduced from the original ~50 ha, down to ~31 ha.

Avoidance of peak season for finless porpoise occurrence

·        To minimise potential acoustic disturbance from construction activities on Finless Porpoise, construction works that may produce underwater acoustic disturbance should be scheduled outside the months with peak Finless Porpoise occurrence (December to May), including:

-          sheet piling works for construction of cofferdam surrounding the reclamation area (Phase 1);

-          sheet piling works for construction of the shorter section of breakwater (Phase 1);

-          sheet piling works for construction of the remaining section of breakwater (Phase 3);

-          bored piling works for berth area (Phase 3); and

-          submarine cable installation works between Shek Kwu Chau and Cheung Sha.

 

Such works should be restricted within June to November.  This approach would not only avoid the peak season for Finless Porpoise occurrence, the magnitude of impacts arise from acoustic disturbance would also be minimised.

·        Submarine cable installation works are also recommended to be scheduled within June to November, when sightings of Finless Porpoise is scarce in the area of the proposed alignment of the submarine cable.  

Opt for quieter construction methods and plants

·        Considering the sensitivity of marine mammals to underwater acoustic disturbance, instead of the previously proposed conventional breakwater and reclamation peripheral structure, which requires noisy piling works, the current circular cells structure for breakwater and reclamation peripheral structure is proposed.  A quieter sheet piling method using vibratory hammer or hydraulic impact hammer, should be adopted for the installation of circular cells for cellular cofferdam and northern breakwater during Phase 1, and southern breakwater Phase 3;  

·        Non-percussive bore piling method would be adopted for the installation of tubular piles for the berth construction during Phase 3.

Monitored exclusion zones

·        During the installation/re-installation/relocation process of floating type silt curtains, in order to avoid the accidental entrance and entrapment of marine mammals within the silt curtains, a monitored exclusion zone of 250 m radius from silt curtain should be implemented. The exclusion zone should be closely monitored by an experienced marine mammal observer at least 30 minutes before the start of installation/re-installation/relocation process.  If a marine mammal is noted within the exclusion zone, all marine works should stop immediately and remain idle for 30 minutes, or until the exclusion zone is free from marine mammals.

·        The experienced marine mammal observer should be well trained to detect marine mammals.  Binoculars should be used to search the exclusion zone from an elevated platform with unobstructed visibility.  The observer should also be independent from the project proponent and has the power to call-off construction activities.

·        In addition, as marine mammals cannot be effectively monitored within the proposed monitored exclusion zone at night, or during adverse weather conditions (i.e. Beaufort 5 or above, visibility of 300 meters or below), marine works should be avoided under weather conditions with low visibility.

Marine mammal watching plan

·        Upon the completion of the installation/re-installation/relocation of floating type silt curtain, all marine works would be conducted within a fully enclosed environment within the silt curtain, hence exclusion zone monitoring would no longer be required.  Subsequently, a marine mammal watching plan should be implemented.  The plan should include regular inspection of silt curtains, and visual inspection of the waters surrounded by the curtains.  Special attention should be paid to Phase 2 (reclamation) where the floating type still curtain would be opened occasionally for vessel access, leaving a temporary 50 m opening.  An action plan should be devised to cope with any unpredicted incidents such as the case when marine mammals are found within the waters surrounded by the silt curtains.

Small openings at silt curtains

·        The openings for vessel access at the silt curtains should be as small as possible to minimise the risk of accidental entrance.

Adoption of regular travel route

·        During construction and operation, captains of all vessels should adopt regular travel route, in order to minimize the chance of vessel collision with marine mammals, which may otherwise result in damage to health or mortality.  The regular travel route should avoid areas with high sighting density of Finless Porpoise as much as possible.

Vessel speed limit

·        The frequent vessel traffic in the vicinity of works area may increase the chance of mammal mammals being killed or seriously injured by vessel collision.  A speed limit of ten knots should be strictly enforced within areas with high density of Finless Porpoise.

·        Passive acoustic monitoring and land-based theodolite monitoring surveys should be adopted to verify the predicted impacts and effectiveness of the proposed mitigation measures.

Training of Staff

·        Staff, including captains of vessels, should be aware of the guidelines for safe vessel operations in the presence of cetaceans during construction and operation phases. Adequate trainings should be provided

IWMF site, work site, marine traffic route

Design team, contractor, IWMF operator

ü

ü

ü

ü

EIAO-TM

7b.8.3.31-7b.8.3.33

Measures to minimise impact on corals

 

Coral translocation

·        Coral communities within and in proximity to the proposed dredging sites would be disturbed by the Project due to the dredging operations.  In order to minimise direct loss of coral communities, translocation of corals that are attached to movable rocks with diameter less than 50 cm are recommended. In order to avoid disturbance to corals during the spawning period, the spawning season of corals (June to August) should be avoided; and that translocation should be carried out during the winter season (November- March).

·        The REA survey results suggest that the 198 directly affected coral colonies were attached to movable rocks (less than 50 cm in diameter).  It is technically feasible to translocate them to avoid direct loss.

·        Prior to coral translocation, a more detailed baseline survey, including a coral mapping survey, is recommended to further confirm the exact number and location of coral colonies within the potentially affected area.  A more detailed coral translocation plan, including selection of suitable recipient site, plan for coral translocation, and event / action plan for coral monitoring should be submitted upon approval of this Project, prior to commencement of construction works.  Advice from relevant governmental departments (i.e. AFCD) and professionals would be sought after, in order to identify a desirable location for the relocation of coral communities.  Post-translocation monitoring on the translocated corals should also be considered.

Coral monitoring programme

·        A coral monitoring programme is recommended to assess any adverse and unacceptable impacts to the coral communities at the coasts of Shek Kwu Chau during construction of the Project.

Phasing of Works

·        To minimize environmental impacts, the proposed phasing of construction works has been carefully designed to reduce the amount of concurrent works, hence minimise SS elevation and the associated impacts on corals.

IWMF site

Design team, contractor, IWMF operator

ü

ü

ü

ü

EIAO-TM

7b.8.3.34-7b.8.3.40

Specific measures to minimise disturbance on breeding White-bellied Sea Eagle

 

Avoidance of noisy works during the breeding season of White-bellied Sea Eagle

·        To minimise potential noise disturbance from construction activities on WBSE, noisy construction works should be scheduled outside their breeding season (December to May) to minimise potential degradation in breeding ground quality and breeding activities, including:

-          sheet piling works for construction of cofferdam surrounding the reclamation area (Phase 1);

-          sheet piling works for construction of the shorter section of breakwater (Phase 1);

-          sheet piling works for construction of the remaining section of breakwater (Phase 3); and

-          bored piling works for berth area (Phase 3).

 

Opt for quieter construction methods and plants

·        To minimise potential construction noise disturbance on WBSE, quieter construction methods and plants should be adopted.  The recommended noise mitigation measures in the Noise chapter (Section 5b.8) should be implemented to minimise potential noise disturbance to acceptable levels.

Restriction on vessel access near the nest of White-bellied Sea Eagle

·        During construction and operation, in order to minimise disturbance on the existing WBSE nest, a pre-defined practical route to restrict vessel access near the nest should be adopted to keep vessels and boats as far away from the nest as possible.

White-bellied Sea Eagle monitoring programme

·        A WBSE monitoring programme is recommended to assess any adverse and unacceptable impacts to the breeding activities of WBSE during construction and operation of the Project.  Monitoring surveys for WBSE would include pre-construction phase (twice per month for duration of three months during their breeding season - between December and May, immediately before the commencement of works), construction phase, and operation phase (two years after the completion of construction works). 

·        Surveys should be conducted twice per month during their breeding season (from December to May); and once per month outside breeding season (June to November).  More details on monitoring for WBSE are presented in the EM&A Manual.

Education of staff

·        Staff, including captains of all vessels during construction and operation phases, should be aware of the ecological importance of WBSE.  Awareness should be raised among staff to minimise any intentional or unintentional disturbance to the nest.

Minimisation of Glare Disturbance

·        To minimise glare disturbance on WBSE, which may  cause disorientation of birds by interfering with their magnetic compass, and disruption in behavioural patterns such as reproduction, fat storage and foraging pattern, any un-necessary outdoor lighting should be avoided, and in-ward and down-ward pointing of lights should be adopted.

 

IWMF site, marine traffic route

Design Team, Contractor, IWMF operator

ü

ü

ü

ü

EIAO-TM

7b.8.3.41

 Opt for Quieter Construction Methods and Plants

 

·        Quieter construction methods and plants should be used to minimise disturbance to the nearby terrestrial habitat and the associated wildlife.

Work site

Design team, contractor, IWMF operator

ü

ü

ü

ü

EIAO-TM

7b.8.3.42

Measures to minimise impacts from artificial lighting

 

·        Unnecessary lighting should be avoided, and shielding of lights should be provided to minimise disturbance from light pollution on fauna groups.

IWMF site

Design team, contractor, IWMF operator

ü

ü

ü

 

EIAO-TM

7b.8.3.43-7b.8.3.44

Measures to minimise accidental spillage

 

·        Regular maintenance of vessels, vehicles and equipments that may cause leakage and spillage should only be undertaken within pre-designated areas, which are appropriately equipped to control the associated discharges.

·        Oils, fuels and chemicals should be contained in suitable containers, and only be used and stored in designated areas which have pollution prevention facilities.  All fuel tanks and storage areas should be sited on sealed areas in order to prevent spillage of fuels and solvents to the nearby watercourses.  All waste oils and fuels should be collected in designated tanks prior to disposal. 

Work site

Contractor, IWMF operator

 

ü

ü

ü

EIAO-TM

7b.8.3.45

Measures to minimise sewage effluent

 

·        Temporary sanitary facilities, such as portable chemical toilets, should be employed on-site where necessary to handle sewage from the workforce.

Work site

Contractor

 

ü

 

 

EIAO-TM

7b.8.3.46

Measures to minimise drainage and construction runoff

 

·        Potential ecological impacts resulted from potential degradation of water quality due to unmitigated surface runoff could be minimised via the detailed mitigation measures in Section 5b.8.  The following presents some of the mitigation measures:

-          On-site drainage system with implemented sedimentation control facilities.

-          Channels, earth bunds or sand bag barriers should be provided on site to direct storm water to silt removal facilities.

-          Provision of embankment at boundaries of earthworks for flood protection.

-          Water pumped out from foundation piles must be discharged into silt removal facilities.

-          During rainstorms, exposed slope/soil surfaces should be covered by tarpaulin or other means, as far as practicable. 

-          Exposed soil surface should be minimized to reduce siltation and runoff.

-          Earthwork final surfaces should be well compacted.  Subsequent permanent surface protection should be immediately performed.

-          Open stockpiles of construction materials, and construction wastes on-site should be covered with tarpaulin or similar fabric during rainstorms.

 

Work site

Contractor

 

ü

 

ü

EIAO-TM

7b.8.3.47

Measures to minimise impacts from general construction activities

 

·        To avoid the entering of construction solid waste into the nearby habitats, construction solid waste should be collected, handled and disposed of properly to avoid entering to the nearby habitats.  It is recommended to clean the construction sites on a regular basis.  

Work site

Contractor

 

ü

 

 

EIAO-TM

7b.8.3.48

Pest Control

 

·        Good waste management practices should be adopted at the IWMF in order to minimise the risk of introduction of pest to the island:

-          Transportation of wastes in enclosed containers

-          Waste storage area should be well maintained and cleaned

-          Waste should only be disposed of at designated areas

-          Timely removal of the newly arrived waste

-          Removal of items that are capable of retaining water

-          Rapid clean up of any waste spillages

-          Maintenance of a tidy and clean site environment

-          Regular application of pest control

-          Education of staff the importance of site cleanliness

 

IWMF site

IWMF operator

 

 

ü

 

 

7b.8.3.49

Control of Marine Habitat Quality during Operation Phase

 

·        Depending on the seabed condition of the approach channel for marine vessels during operation phase of the IWMF, maintenance dredging may be required to ensure safe access.  In order to avoid degradation in water quality due to elevation in SS and dispersion of sediment plume due to dredging works, it is recommended that any future maintenance dredging works should not be carried out within 100 m from the shore, similar to that of the dredging for anti-scouring protection layer during construction phase.  All maintenance dredging works should be carried out with the implementation of silt curtain to control the dispersion of SS.  The production rate should comply with the permit dredging rate and number of grab per hour.

IWMF site

IWMF operator

 

 

ü

 

EIAO-TM; WPCO

7b.8.4.1 – 7b.8.4.8

Compensation of loss of important habitat of Finless Porpoise

 

Designation of Marine Park

·        The Project Proponent has made a firm commitment to seek to designate a marine park of approximately 700 ha in the waters between Soko Islands and Shek Kwu Chau, in accordance with the statutory process stipulated in the Marine Parks Ordinance, as a compensation measure for the habitat loss arising from the construction of the IWMF at the artificial island near SKC.

·        The Project Proponent shall seek to complete the designation by 2018 to tie in with the operation of the IWMF at the artificial island near SKC.

·        A further study should be carried out to review relevant previous studies and collate available information on the ecological characters of the proposed area for marine park designation; and review available survey data for Finless Porpoise, water quality, fisheries, marine traffic and planned development projects in the vicinity.  Based on the findings, ecological profiles of the proposed area for marine park designation should be established, and the extent and location of the proposed marine park be determined.  The adequacy of enhancement measures should also be reviewed. 

·        In addition, a management plan for the proposed marine park should be proposed, covering information on the responsible departments for operation and management (O&M) of the marine park, as well as the O&M duties of each of the departments involved.  Consultation with relevant government departments and stakeholders should be conducted under the study.  The study should be submitted to Director of Environmental Protection (DEP) for approval before the commencement of construction works.

·        The Project Proponent should provide assistance to AFCD during the process of the marine park designation.  .

Waters between Shek Kwu Chau and Soko Islands

Project Proponent

ü

 

ü

 

EIAO-TM

7b.8.5.1 – 7b.8.5.4

Additional Enhancement or Precautionary Measures

Deployment of Artificial Reefs

·        Deployment of artificial reefs (ARs) is an enhancement measure for the marine habitats. ARs are proposed to be deployed within the proposed marine park under this Project.  The exact location, dimension and type of ARs to be deployed are to be further investigated along with the further study of the proposed marine park under this Project. The proposed ARs would be deployed at the same time as the complete designation of marine park.

Release of Fish Fry at Artificial Reefs and Marine Park

·        Release of fish fry at the proposed ARs, as well as the proposed marine park under this study, should enhance the fish resources in the nearby waters, and subsequently food sources for Finless Porpoise.  The proposed ARs with various micro-habitats would have the potential to provide shelter and nursery ground for the released fish fry.  The frequency and quantity of fry to be released should be agreed by AFCD.

Within the proposed marine park under this study

Project Proponent

ü

 

ü

 

EIAO-TM

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.13            Implementation Schedule for Fisheries Measures for the IWMF at the artificial island near SKC

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

8b.8.1.2

Measure to minimise loss of and disturbance on fisheries resources

 

·        Alteration to the phasing of works, construction method, and layout plan of the IWMF at the artificial island near SKC has been made.  The total fishing ground to be permanently lost due to the project has been significantly reduced from ~50 ha to ~31 ha.  By adopting the current circular cells instead of the conventional seawall construction method, SS elevation would be greatly reduced, minimising adverse impact on the health of fisheries resources. 

IWMF site

Design team, contractor

ü

ü

 

ü

EIAO-TM

8b.8.1.3

Measure to minimise impingement and entrainment

·        Provision of a screen at the water intake point for desalination plant would be essential to minimise the risk of impingement and entrainment of fisheries resources (including fish, larvae and egg) through the intake point.

IWMF site

Design team, contractor, IWMF operator

ü

ü

ü

 

EIAO-TM

8b.8.1.4-8b.8.1.6

Measures to control water quality

·        No wastewater effluent, anti-fouling agent, heavy metals and other contaminants would be released during operation phase of the Project.

·        Mitigation measures recommended in the water quality impact assessment during construction and operation would serve to protect fisheries resources from indirect impacts resulted from the Project

Work site, IWMF site

Design team, contractor, IWMF operator

ü

ü

ü

ü

EIAO-TM

8b.8.1.7 – 8b.8.1.8

Additional Enhancement / Precautionary Measures

·        Artificial Reefs (ARs) are proposed to be deployed within the proposed marine park under this Project as an enhancement measure for the marine habitats. This enhancement feature would bring positive impacts to the previously identified important spawning and nursery ground for fisheries resources.

Release of Fish Fry at Artificial Reefs

·        Release of fish fry has been proposed under this Project.  The proposed deployment of ARs within the proposed marine park would provide shelter and nursery ground for the released fish fry.  The frequency and quantity of fry to be released should be agreed by AFCD.

Within the proposed marine park in the waters between Soko Islands and Shek Kwu Chau

Project Proponent

ü

 

ü

 

EIAO-TM

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning

Table 14.14            Implementation Schedule for Landscape and Visual Measures for the IWMF at the artificial island near SKC

EIA Ref

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S10b.10

MLVC- 01

Grass-hydroseeded bare soil surface and stock pile area

Work site /  During construction phase

Contractor

 

ü

 

 

 

S10b.10

MLVC-02

Landscape Design

1)       Early planting using fast grow trees and tall shrubs at strategic locations within site as buffer to block view corridors to the site from the VSRs, and to locally screen haul roads, excavation works and site preparation works.

2)       Use of tree species of dense tree crown to serve as visual barrier.

3)       Hard and soft landscape treatment (e.g. trees and shrubs) of open areas within development to provide a background for the outdoor containers from open view, shade and shelter, and a green appearance from surrounding viewpoints.

4)       Planting strip along the periphery of the project site.

5)       Selected tree species suitable for the coastal condition.

Work site /  During design & construction phases

Contractor

ü

ü

 

 

 

S10b.10

MLVC-03

Adoption of Natural Features of the Existing Shoreline

1)       Use of boulders in different sizes and with the similar textures of the existing rocky shores for the construction of breakwater and artificial shoreline in order to blend into the existing natural shoreline.

2)       Use of cellular cofferdam together with the natural boulders to form a curvature shoreline for the reclamation area to echo with the natural shoreline of SKC.

Work site /  During construction phase

Contractor

 

ü

 

 

 

S10b.10

MLVC-04

Greening Design (Rooftop & Vertical Greening)

1)       Implementation of rooftop and vertical greening (vertical building envelope) along the periphery of each building block to increase the amenity value of the work, moderate temperature extremes and enhance building energy performance. The greening appearance of the building shall enhance its visual harmony with the natural surroundings as well as reduce the apparent visual mass of the structure.

2)       Sufficient space between concrete enclosure and stack to minimize heat transfer.

3)       Introduction of landscape decks at the stack to further enhance the overall natural and green concept unique for this site.

Work site /  During design & construction phases

Contractor

ü

ü

 

 

 

S10b.10

MVC-01

Visual Mitigation and Aesthetic Design

1)       Use of natural materials with recessive color to minimize the bulkiness of the building.

2)       Adoption of innovative aesthetic design to the chimney to minimize or visually mitigate the massing of the chimney so as to reduce its visual impact to the surroundings.

3)       Color of the chimney in a gradual changing manner to match with the color of the sky.

4)       Provision of observation deck for public enjoyment at the top of the chimney to diminish the feeling of chimney.

5)       Provision of sky gardens between the two stacks to allow additional greening for enhancing the aesthetic quality. Maintenance access (elevator and staircase) from the ground floor to the sky gardens will be provided to allow maintenance of the sky gardens.

6)       Integration of the visitor’s walkway with different material façade design of incinerator plant to enhance the aesthetic quality.

Structures in IWMF /  During design & construction phases

Contractor

ü

ü

 

 

 

S10b.10

MVC-02

Control of the security floodlight for construction areas at night to avoid excessive glare to the surrounding receiver.

Work site / During construction phase

Contractor

 

ü

 

 

 

S10b.10

MVC-03

Optimization of the construction sequence and construction programme to minimize the duration of impact.

Work site / During design & construction phases

Contractor

ü

ü

 

 

 

S10b.10

MVC-04

Storage of the backfilling materials for site formation & construction materials / wastes on site at a maximum height of 2m, covered with an impermeable material of visually un-obtrusive material (in earth tone).

Work site / During construction phase

Contractor

 

ü

 

 

 

S10b.10

MVC-05

Reduction of the number of construction traffic at the site to practical minimum.

Work site / During construction phase

Contractor

 

ü

 

 

 

S10b.10

MLVO-01

Planting Maintenance

Provision of proper planting maintenance and replacement of defective plant species on the new planting areas to enhance aesthetic and landscape quality.

Project site / During Operation phase

Contractor

 

 

ü

 

 

S10b.10

MVO-01

Environmental Education Centre

Development of an Environmental Education Center, in which regular exhibitions and lectures to promote environmental awareness and waste reduction concept would be provided, as a part of the IWMF for the general public to alleviate negative public perceptions of the development.

Project site / During Operation phase

Contractor

 

 

ü

 

 

S10b.10

MVO-02

Control of Light

Control the numbers of lights and their intensity to a level that is good enough to meet the safety requirements at night but not excessive.

Project site / During Operation phase

Contractor

 

 

ü

 

 

S10b.10

MVO-03

Control of Operation Time

Minimization of the frequency of waste transportation to practical minimum (e.g. limit the reception of MSW from 8 am to 8 pm)

Project site / During Operation phase

Contractor

 

 

ü

 

 

* Des - Design, C - Construction, O – Operation, and Dec - Decommissioning