EIA Ref.

EM&A

Log Ref

Recommended Mitigation Measures

(What Measures)

Objectives of the recommended Measures & Main Concerns to address

(What Requirements)

Who to implement the measures?

(Who)

Location of the measures

(Where)

When to

Implement the measures?

(When)

Implementation

Status

Construction Dust Impact

S3.8

D1

Mitigation measures in form of regular watering under a good site practice should be adopted. Watering once per hour on exposed worksites and haul road is proposed to achieve dust removal efficiency of 92.1%. While the above watering frequencies are to be followed, the extent of watering may vary depending on actual site conditions but should be sufficient to maintain an equivalent intensity of no less than 1.7 L/m2 to achieve the respective dust removal efficiencies

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction

phase

*

S3.8

D2

The Contractor shall follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation.

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction

phase

*

 

S3.8

D3

Following dust suppression measures should also be incorporated by the Contractor to control the dust nuisance throughout the construction Phase

 

          Any excavated or stockpile of dusty material should be covered entirely by impervious sheeting or sprayed with water to maintain the entire surface wet and then removed or backfilled or reinstated where practicable within 24 hours of the excavation or unloading;

          Any dusty materials remaining after a stockpile is removed should be wetted with water and cleared from the surface of roads;

          A stockpile of dusty material should not be extend beyond the pedestrian barriers, fencing or traffic cones;

          The load of dusty materials on a vehicle leaving a construction site should be covered entirely by impervious sheeting to ensure that the dusty materials do not leak from the vehicle;

          Where practicable, vehicle washing facilities with high pressure water jet should be provided at every discernible or designated vehicle exit point. The area where vehicle washing takes place and the road section between the washing facilities and the exit point should be paved with concrete, bituminous materials or hardcores;

          When there are open excavation and reinstatement works, hoarding of not less than 2.4m high should be provided as far as practicable along the site boundary with provision for public crossing. Good site practice shall also be adopted by the Contractor to ensure the conditions of the hoardings are properly maintained throughout the construction period.

          The portion of any road leading only to construction site that is within 30m of a vehicle entrance or exit should be kept clear of dusty materials;

          Surfaces where any pneumatic or power-driven drilling, cutting, polishing or other mechanical breaking operation takes place should be sprayed with water or a dust suppression chemical continuously;

          Any area that involves demolition activities should be sprayed with water or a dust suppression chemical immediately prior to, during and immediately after the activities so as to maintain the entire surface wet;

          Where a scaffolding is erected around the perimeter of a building under construction, effective dust screens, sheeting or netting should be provided to enclose the scaffolding from the ground floor level of the building, or a canopy should be provided from the first floor level up to the highest level of the scaffolding;

          Any skip hoist for material transport should be totally enclosed by impervious sheeting;

          Every stock of more than 20 bags of cement or dry pulverised fuel ash (PFA) should be covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides;

          Cement or dry PFA delivered in bulk should be stored in a closed silo fitted with an audible high level alarm which is interlocked with the material filling line and no overfilling is allowed;

          Loading, unloading, transfer, handling or storage of bulk cement or dry PFA should be carried out in a totally enclosed system or facility, and any vent or exhaust should be fitted with an effective fabric filter or equivalent air pollution control system; and

          Exposed earth should be properly treated by compaction, turfing, hydroseeding, vegetation planting or sealing with latex, vinyl, bitumen, shortcrete or other suitable surface stabiliser within six months after the last construction activity on the construction site or part of the construction site where the exposed earth lies.

 

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction

phase

 

 

*

 

 

 

*

 

^

 

*

 

^

 

 

^

 

 

 

 

^

 

^

 

 

^

 

 

^

 

 

N/A

 

N/A

 

N/A

 

 

N/A

 

 

 

N/A

S3.8

D4

Implement regular dust monitoring under EM&A programme during the construction stage.

Monitoring of dust impact

Contractor

Selected

representative dust

monitoring station

Construction

phase

^

Noise Impact (Construction Phase)

S4.9

N1

Implement the following good site management practices:

          Only well-maintained plant should be operated on-site and plant should be serviced regularly during the construction programme;

          Machines and plant (such as trucks, cranes) that may be in intermittent use should be shut down between work periods or should be throttled down to a minimum;

          Plant known to emit noise strongly in one direction, where

possible, be orientated so that the noise is directed away from nearby NSRs; silencers or mufflers on construction equipment should be properly fitted and maintained during the construction works;

          Mobile plant should be sited as far away from NSRs as possible and practicable;

          Material stockpiles, mobile container site office and other

structures should be effectively utilised, where practicable, to screen noise from on-site construction activities.

Control construction airborne

noise

 

Contractor

All construction sites

Construction

phase

 

^

 

^

 

^

 

 

^

 

^

 

S4.9

N2

Install temporary site hoarding (approx 2.4m high) located on the site boundaries between noisy construction activities and NSRs. The conditions of the hoardings shall be properly maintained throughout the construction period.

Reduce the construction noise levels at low-level zone of NSRs through partial screening.

Contractor

All construction sites where practicable

Construction

phase

^

S4.9

N3

Install movable noise barriers and full enclosure and acoustic mat, screen the noisy plants including air compressor and generator.

Screen the noisy plant items to be used at all construction sites

Contractor

All construction sites where practicable

Construction

phase

^

S4.9

N4

Use of “Quiet” Plant and Working Methods

Reduce the noise levels of plant items

Contractor

All construction sites where practicable

Construction

phase

                  N/A    

S4.9

N5

Sequencing operation of construction plants where practicable.

Operate sequentially within the same work site to reduce the construction airborne noise

Contractor

All construction sites where practicable

Construction

phase

^

S4.9

N6

Implement a noise monitoring under EM&A programme.

Monitor the construction noise levels at the selected representative locations

Contractor

Selected representative noise monitoring stations

Construction

phase

^

Water Quality Impact (Construction Phase)

S5.7

W1

Construction Runoff and Site Drainage

In accordance with the Practice Note for Professional Persons on Construction Site Drainage, Environmental Protection Department, 1994 (ProPECC PN 1/94), construction phase mitigation measures should be provided and the Storm Water Pollution Control Plan is given below.

where appropriate, should include the following:

Stormwater Pollution Control Plan

          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 stormwater 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.

          Diversion of natural stormwater should be provided as far as possible. The design of temporary on-site drainage should prevent runoff going through site surface, construction machinery and equipments in order to avoid or minimize polluted runoff. Sedimentation tanks with sufficient capacity, constructed from pre-formed individual cells of approximately  6 to 8m3 capacities, are recommended as a general mitigation measure which can be used for settling surface runoff prior to disposal. The system capacity shall be flexible and able to handle multiple inputs from a variety of sources and suited to applications where the influent is pumped.

          The dikes or embankments for flood protection should be implemented around the boundaries of earthwork areas. Temporary ditches should be provided to facilitate the runoff discharge into an appropriate watercourse, through a silt/sediment trap. The silt/sediment traps should be incorporated in the permanent drainage channels to enhance deposition rates.

          The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94. The detailed design of the sand/silt traps should be undertaken by the contractor prior to the commencement of construction.

          Construction works should be programmed to minimize surface excavation works during the rainy seasons (April to September). All exposed earth areas should be completed and vegetated as soon as possible after earthworks have been completed. If excavation of soil cannot be avoided during the rainy season, or at

any time of year when rainstorms are likely, exposed slope surfaces should be covered by tarpaulin or other means.

          All drainage facilities and erosion and sediment control structures should be regularly inspected and maintained to ensure proper and efficient operation at all times and particularly following rainstorms. Deposited silt and grit should be removed regularly and disposed of by spreading evenly over stable, vegetated areas.

          Measures should be taken to minimise the ingress of site drainage into excavations. If the excavation of trenches in wet periods is necessary, it should be dug and backfilled in short sections wherever practicable. Water pumped out from trenches or foundation excavations should be discharged into storm drains via silt removal facilities.

          All open stockpiles of construction materials (for example, aggregates, sand and fill material) of more than 50m3 should be covered with tarpaulin or similar fabric during rainstorms. Measures should be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system.

          Manholes (including newly constructed ones) should always be adequately covered and temporarily sealed so as to prevent silt, construction materials or debris being washed into the drainage system and storm runoff being directed into foul sewers.

          Precautions to be taken at any time of year when rainstorms are likely, actions to be taken when a rainstorm is imminent or forecasted, and actions to be taken during or after rainstorms are summarized in Appendix A2 of ProPECC PN 1/94. Particular attention should be paid to the control of silty surface runoff during storm events.

          All vehicles and plant should be cleaned before leaving a construction site to ensure no earth, mud, debris and the like is deposited by them on roads. An adequately designed and sited wheel washing facilities should be provided at every construction site exit where practicable. 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. The section of access road leading to, and exiting from, the wheel-wash bay to the public road should be paved with sufficient backfall toward the wheel-wash bay to prevent vehicle tracking of soil and silty water to public roads and drains.

          Oil interceptors should be provided in the drainage system downstream of any oil/fuel pollution sources. The oil interceptors should be emptied and cleaned regularly to prevent the release of oil and grease into the storm water drainage system after accidental spillage. A bypass should be provided for the oil interceptors to prevent flushing during heavy rain.

          Construction solid waste, debris and rubbish on site should be collected, handled and disposed of properly to avoid water quality impacts.

          All fuel tanks and storage areas should be provided with locks and sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank to prevent spilled fuel oils from reaching water sensitive receivers nearby.

          Regular environmental audit on the construction site should be carried out in order to prevent any malpractices. Notices should be posted at conspicuous locations to remind the workers not to discharge any sewage or wastewater into the meander, wetlands and fish ponds.

 

Control construction runoff

Contractor

All construction sites

Construction

phase

 

 

 

 

 

*

 

 

 

 

 

 

 

^

 

 

 

 

 

 

 

 

 

^

 

 

 

 

^

 

 

 

N/A

 

 

 

 

 

 

^

 

 

 

 

^

 

 

 

 

*

 

 

 

^

 

 

 

^

 

 

 

 

 

^

 

 

 

 

 

 

 

 

N/A

 

 

 

 

^

 

^

 

 

 

 

^

 

 

 

S5.7

 

W2

Stream Diversion

          In order to prevent sediment transport during riverbank works, deployment of silt curtain should be implemented, especially when construction works encroach or occur in close distance to water body. It is recommended to carry out all the riverbank works and diversion works within a cofferdam or diaphragm wall and the work areas on riverbed should be kept in dry condition.

Minimize water quality impact due to stream diversion

Contractor

All streams that required diversion

Construction

phase

 

N/A

S5.7

 

W3

Groundwater from Contaminated Area

          For other inaccessible sites, site investigation is required when they are resumed and handed over to the Project Proponent to identify if contaminated groundwater is found.

          If the investigation results indicated that the groundwater to be generated from construction works would be contaminated, the contaminated groundwater should be either discharged into recharged wells, or properly treated in compliance with the requirements of Technical Memorandum on Standards for Effluents Discharged into Drainage on Sewerage Systems, Inland and Coastal Waters.

          If recharged well method were used, the groundwater quality in the recharged well should not be affected by recharging operation, i.e. the pollution levels of the recharged groundwater should not be higher than that in the recharging wells.

           If treatment and discharge method were used, the design of wastewater treatment facilities, such as active carbon and petrol interceptor, should be submitted to the EPD and a discharge license should be obtained under the WPCO through the Regional Offices of EPD.

Minimize water quality impact due to potential groundwater from contaminated area

Contractor

All identified groundwater- contaminated areas

Construction

phase

 

N/A

 

 

 

N/A

 

 

 

 

 

 

 

N/A

 

 

 

 

N/A

S5.7

 

W4

Sewage from Workforce

Portable chemical toilets and sewage holding tanks should be provided for handling the construction sewage generated by the workforce. A licensed Contractor should be employed to provide appropriate and adequate portable toilets and be responsible for appropriate disposal and maintenance.

 

Notices should be posted at conspicuous locations to remind the workers not to discharge any sewage or wastewater into the nearby environment during the construction phase of the Project. Regular environmental audit on the construction site should be conducted in order to provide an effective control of any malpractices and achieve continual improvement of environmental performance on site. It is anticipated that sewage generation during the construction phase of the Project would not cause water quality impact after undertaking all required measures.

Handling of site sewage

Contractor

All construction sites

Construction

Phase

 

 

^

 

 

 

 

 

 

Waste Management (Construction Waste)

S7.6

 

WM1

Waste Reduction Measures

Waste reduction is best achieved at the planning and design phase, as well as by ensuring the implementation of good site practices. The following recommendations are proposed to achieve reduction:

 

          segregate and store different types of waste in different

containers, skip or stockpiles to enhance reuse or recycling of materials and their proper disposal;

          proper storage and site practices to minimize the potential for damage and contamination of construction materials;

          plan and stock construction materials carefully to minimize

amount of waste generated and avoid unnecessary generation of waste;

          sort out demolition debris and excavated materials from

demolition works to recover reusable/recyclable portions (i.e. soil, broken concrete, metal etc);

          provide training to workers on the importance of appropriate waste management procedures, including waste reduction, reuse and recycling.

Reduce waste generation

Contractor

All construction sites where practicable

Prior to the commencement of construction

 

 

 

 

 

^

 

 

^

 

 

 

 

^

 

 

 

N/A

 

 

^

S7.6

 

WM2

Prepare Waste Management Plan and submit to the Engineer for approval

Minimize waste generation during construction

Contractor

All construction sites

Construction

phase

N/A

 

S7.6

WM3

Good Site Practice

The following good site practices are recommended throughout the construction activities:

          Nomination of an approved personnel, such as a site manager, to be responsible for the implementation of good site practices, arrangements for collection and effective disposal to an appropriate facility, of all wastes generated at the site;

          Training of site personnel in site cleanliness, appropriate waste management procedures and concepts of waste reduction, reuse and recycling;

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

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

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

 

Minimize waste generation during construction

Contractor

All construction sites

Construction

phase

 

 

 

^

 

 

 

 

^

 

 

^

 

^

 

^

 

 

 

 

 

 

S7.6

WM4

Storage of Waste

The following recommendation should be implemented to minimize the impacts:

          Waste such as soil should be handled and stored well to ensure

secure containment;

          Stockpiling area should be provided with covers and water

spraying system to prevent materials from wind-blown or being washed away;

           Different locations should be designated to stockpile each material to enhance reuse;

Minimize waste impacts from storage

Contractor

All construction sites

Construction

phase

 

 

 

^

 

 

^

 

 

^

 

S7.6

WM5

Collection and Transportation of Waste

The following recommendation should be implemented to minimize the impacts:

          Remove waste in timely manner;

          Employ the trucks with cover or enclosed containers for waste transportation;

          Obtain relevant waste disposal permits from the appropriate authorities; and

           Disposal of waste should be done at licensed waste disposal facilities.

Minimize waste impact from storage

Contractor

All construction sites

Construction

phase

 

 

^

^

 

^

 

^

S7.6

WM6

Excavated and C&D Material

Wherever practicable, C&D materials should be segregated from other wastes to avoid contamination and ensure acceptability at Public Fill Reception Facilities areas or reclamation sites. The following mitigation measures should be implemented in handling the excavated and C&D materials:

 

          Maintain temporary stockpiles and reuse excavated fill material for backfilling;

          Carry out on-site sorting;

          Deliver surplus artificial hard materials to Tuen Mun Area 38 recycling plant or its successor for recycling into subsequent useful products;

          Make provisions in the Contract documents to allow and promote the use of recycled aggregates where appropriate; and

          Implement a recording system for the amount of waste generated, recycled and disposed of for checking;

Standard formwork should be used as far as practicable in order to minimize the arising of C&D waste. The use of more durable formwork (e.g. metal hoarding) or plastic facing should be encouraged in order to enhance the possibility of recycling. The purchasing of construction materials should be carefully planned in order to avoid over ordering and wastage.

 

Wheel wash facilities have to be provided at the site entrance before the trucks leaving the works area.

Minimize waste impacts from excavated and C&D material

Contractor

All construction sites

Construction

phase

 

^

 

 

 

^

 

N/A

N/A

 

 

N/A

 

 

^

 

N/A

 

 

 

 

 

 

 

^

S7.6

WM7

Contaminated Soil

As a precaution, it is recommended that standard good site practice should be implemented during the construction phase to minimize any potential exposure to contaminated soils or groundwater. The details of mitigation measures to minimize the potential environmental implications arising from the handling of contaminated materials refer to Land Contamination Section.

Remediate contaminated soil

Contractor

All construction sites where applicable

Construction phase

 

^

S7.6

WM8

Chemical Waste

If chemical wastes are produced at the construction site, the Contractors should register with EPD as chemical waste producers. Chemical wastes should be stored in appropriate containers and collected by a licensed chemical waste Contractor. Chemical wastes (e.g. spent lubricant oil) should be recycled at an appropriate facility as far as possible, while the chemical waste that cannot be recycled should be disposed of at either the Chemical Waste Treatment Centre, or another licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

Control the chemical waste and ensure proper storage, handling and disposal

Contractor

All construction sites

Construction phase

 

*

S7.6

WM9

General Waste

          General refuse should be stored in enclosed bins separately from construction and chemical wastes. Recycling bins should also be placed to encourage recycling.

          Preferably enclosed and covered areas should be provided for general refuse collection and routine cleaning for these areas should also be implemented to keep areas clean.

          A reputable waste collector should be employed to remove general refuse on a daily basis.

Minimize production of the general refuse and avoid odour, pest and litter impacts

Contractor

All construction sites

Construction phase

 

N/A

 

 

 

^

 

 

 

N/A

S7.6

WM10

Sewage

          The WMP should document the locations and number of portable chemical toilets depending on the number of workers, land availability, site condition and activities.

          Regularly collection by licensed collectors should be arranged to minimize potential environmental impacts.

Minimize production of sewage impacts

Contractor

All construction sites

Construction phase

 

N/A

 

 

N/A

S7.6

WM11

Topsoil reuse – Topsoil, where identified, should be stripped and stored for re-use in the construction of the soft landscape works, where practical. This is considered a general measure for good site practice.

Good site practice

Contractor/ Project Proponent

Onsite

Construction phase

N/A

 

 

 

Land Contamination

S 8.4

LC2

Detailed site investigation (SI) for all inaccessible potentially

contaminated sites in 2 NDAs

Verify the land

contamination potential

before the commencement

of construction

Project

Proponent

Detailed

Design

Consultant

Contractor

All inaccessible

potentially

contaminated sites in

2 NDAs as listed in

the CAP

After the land

is resumed

and handed

over to the

Project

Proponent

*

S 8.5

LC3

Preparation and submission of supplementary Contamination

Assessment Report (CAR) and Remediation Action Plan (RAP) for

all inaccessible potentially contaminated sites in 2 NDAs to EPD

for agreement if land contamination is confirmed

Present the findings of SI

and evaluate the potential

environmental and human

health impacts

Recommend appropriate

mitigation measures for the

contaminated soil and

groundwater identified in

the assessment if remediation is required

Project

Proponent/

Detailed

Design

Consultant

All inaccessible

potentially

contaminated sites in 2 NDAs as listed in the CAP

Prior to the

commencement of any

proposed

construction

works if land

contamination

is confirmed

and remediation is required

*

S 8.5

LC4

Preparation and submission of Remediation Report to EPD for agreement

Demonstrate that the

decontamination work is

adequate and is carried out

in accordance with the

endorsed supplementary

CAR and RAP

Project

Proponent/

Detailed

Design

Consultant

All inaccessible

potentially

contaminated sites in

2 NDAs as listed in the CAP

Prior to the

commencement of any

proposed

construction

works if land

contamination

is confirmed

and remediation is required

N/A

S 8.6

LC5

Re-appraisal of surveyed sites (if they become part of the land requirement for NDA development) that were not identified as potentially contaminated or could not be accessed for visual inspection during the site survey

Verify the land contamination potential due to potential change of land uses before the commencement of construction

Project

Proponent/

Detailed

Design

Consultant

All surveyed sites (if they become part of the land requirement for NDA development (that were not identified as potentially contaminated or could not be accessed for visual inspection during the site survey as listed in the CAP

After the land is resumed and handed over to the Project Proponent.

N/A

S 8.7.2

and

Appendix

8.4

LC6

Treatment of arsenic-containing soil

Solidification/Stabilization” (S/S) treatment method was proposed for the treatment of arsenic-containing soil. Toxicity Characteristic

Leaching Procedure (TCLP) test should be undertaken after S/S in order to ensure that the contaminant will not leach to the environment. Unconfined Compressive Strength (UCS) test should be conducted, and not less than 1MPa should be met prior to the backfilling or stockpiled for future reuse within the study area.

To treat the arsenic containing

soil

Government

Developer/

Contractor

KTN NDA

Prior to commencement of construction

works within

KTN NDA

N/A

S 8.7.2

and

Appendix

8.4

LC7

Excavation and Transportation

          Excavation profiles must be properly designed and executed

with attention to the relevant requirements for environment,

health and safety;

          In case the soil to be excavated is situated beneath the groundwater table, it may be necessary to lower the groundwater table;

          Excavation should be carried out during dry season as far as

possible to minimize runoff from excavated soils;

          Stockpiling site(s) should be lined with impermeable sheeting

and bunded. Stockpiles should be properly covered by

impermeable sheeting to reduce dust emission during dry

season or contaminated run-off during rainy season.

Watering should be avoided on stockpiles of soil to minimize

runoff;

          Supply of suitable backfill material after excavation, if require;

Vehicles containing any excavated materials should be

suitably covered to limit potential dust emissions or run-off, and truck bodies and tailgates should be sealed to prevent any discharge during transport or during wet season;

          Speed control for the trucks carrying excavated materials should be enforced; and Vehicle wheel washing facilities at the site’s exit points should be established and used.

To minimize the potential

environmental impacts

arising from the handling of

contaminated materials

Contractor

KTN NDA

Prior to commencement of construction

works within

KTN NDA

N/A

S 8.7.2

and

Appendix

8.4

LC8

Solidification/Stabilization

          The loading, unloading, handling, transfer or storage of

cement should be carried out in an enclosed system;

          Mixing process and other associated material handling

activities should be properly scheduled to minimize potential

noise impact and dust emission;

          The mixing facilities should be sited as far apart as

practicable from the nearby noise sensitive receivers;

          Mixing of soil and cement / water / other additive(s) should  be undertaken at a solidification plant to minimize the

potential for leaching;

          Runoff from the solidification / stabilization area should be

prevented by constructing a concrete bund along the

perimeter of the solidification / stabilization area;

          If stockpile of treated soil is required, the stockpiling site(s)

should be lined with impermeable sheeting and bunded.

Stockpiles should be properly covered by impermeable

sheeting to reduce dust emission during dry season or site

run-off during rainy season; and

If necessary, there should be clear and separated areas for

stockpiling of untreated and treated materials.

To minimize the potential

environmental impacts

arising from the handling of

contaminated materials

Contractor

KTN NDA

The course of

treatment

N/A

S 8.7.2

and

Appendix

8.4

LC9

Safety Measures

          Set up a list of safety measures for site workers;

          Provide written information and training on safety for site workers;

          Keep a log-book and plan showing the zones requiring treatment and clean zones;

           Maintain a hygienic working environment;

          Avoid dust generation;

          Provide face and respiratory protection gear to site workers if necessary;

          Provide personal protective clothing (e.g. chemical resistant

          jackboot, liquid tight gloves) to site workers if necessary;

          Provide first aid training and materials to site worker;

          Bulk earth moving equipment should be utilized as much as possible to minimize worker

Eating, drinking and smoking should not be allowed in the

excavation areas and treatment area to avoid inadvertent ingestion

of arsenic containing soil.

To minimize the potential

adverse effects on health

and safety of construction

workers

Contractor

KTN NDA

The course of

treatment

N/A

Landfill Gas Hazard

S10.6

LFG1

          Underground rooms or void should be avoided as far as practicable in the proposed developments within the Consultation Zone and should be avoided totally in the proposed developments within the MTLL.

          Buildings or structures within the MTLL should be at ground level with raised floor slabs which are less prone to gas ingress.

          For the high risk category, the use of active control of gas, including barriers and detection systems are recommended. These measures include the control of gas by mechanical means e.g. ventilation of spaces with air to dilute gas, or extraction of gas using fans or blowers.

          For the low risk category, the provision of barriers to the movement of gas is recommended. Measures recommended include the use of membranes in floors or walls, or in trenches, coupled with high permeability vents such as nofines gravel in trenches or voids/permeable layers below structures.

          The need and practicality of incorporating such measures should be reviewed in the detailed Qualitative LFG Hazards Assessment (QLFGHA) during the detailed design stage for developments within the 250m Consultation Zone and within MTLL. Recommendations on the detailed precautionary and protection measures to be adopted should be given in the QLFGHA.

          The design and construction method of the proposed development within MTLL (i.e. the proposed recreational area in site E1-1) should be provided to EPD for agreement in the design stage to ensure compatibility with the landfill restoration facilities and aftercare works within MTLL, such that these facilities and works will not be affected by the construction or operation of the proposed development.

To minimize the risk of LFG

hazards to occupants within

MTLL and its 250m

Consultation Zone

Government /

Developer/

Detailed

Design

Consultant

within MTLL

and its 250m

Consultation

Zone

Buildings within MTLL

and its 250m

Consultation Zone

Detailed

design phase

N/A

S10.6

LFG2

          During all works, safety procedures should be implemented to minimize the risks of fires and explosions, asphyxiation of workers (especially in confined space) and toxicity effects resulting from contact with contaminated soils and groundwater.

          Safety officers, specifically trained with regard to LFG and leachate related hazards and the appropriate actions to take in adverse circumstances, should be present on all worksites throughout the works.

          All personnel who work on site and all visitors to the site should be made aware of the possibility of ignition of gas in the vicinity of the works, the possible presence of contaminated water and the need to avoid physical contact with it.

          Those staff who work in, or have responsibility for “at risk” areas, including bore pilling and excavation works, should receive appropriate training on working in areas susceptible to LFG.

          Enhanced personal hygiene practices including washing thoroughly after working and eating only in “clean” areas should be adopted where contact may have been made with any groundwater which is thought to be contaminated with leachate.

          Any offices / quarters set up on site should take precautions against LFG ingress, such as being raised off the ground. Other storage premizes, e.g. shipping containers, where this is not possible should be well ventilated prior to entry.

          Adequate precautions to prevent the accumulation of LFG under site buildings and within storage shed should be taken by raising buildings off the ground where appropriate andairing” storage containers prior to entry by personnel and ensuring adequate ventilation at all times.

          Smoking and naked flames should be prohibited within confined spaces. “No Smoking” and “No Naked Flame” notices in Chinese and English should be posted prominently around the construction site. Safety notices should be posted warning of the potential hazards.

          Welding, flame-cutting or other hot works may only be carried out in confined spaces when controlled by a “permit to work” procedure, properly authorized by the Safety Officer. The permit to work procedure should set down clearly the requirements for continuous monitoring of methane, carbon dioxide and oxygen throughout the period during which the hot works are in progress. The procedure should also require the presence of an appropriately qualified person who shall be responsible for reviewing the gas measurements as they are made, and who shall have executive responsibility for suspending the work in the event of unacceptable or hazardous conditions. Only those workers who are appropriately trained and fully aware of the potentially hazardous conditions which may arise should be permitted to carry out hot works in confined areas.

          During the construction works, adequate fire extinguishers and breathing apparatus sets should be made available on site and appropriate training given in their use.

          Ongoing gas monitoring should be considered for offices, stores etc set up on site.

To minimize the risk of LFG

hazards to the staff and

visitors within MTLL and its 250m Consultation Zone

Contractor

Construction sites

within MTLL and its

250m Consultation Zone

Construction

phase

N/A

S10.6

LFG3

Utility Companies

          The developers should make the utility companies aware of the location and features of the site within the Consultation Zone during the respective detailed design stage as part of the QLFGHA.

          The utilities companies should have a responsibility to train and ensure their staff to take appropriate precautions at all times when entering enclosed spaces or plant rooms.

          Should utility installation be required in site E1-1, the developers should make the utility companies aware of the potential constraints imposed by the landfill restoration facilities and aftercare works to ensure these facilities and works will remain unaffected. Appropriate precautionary measures against landfill gas should also be taken should utility installation be required within the MTLL.

Building Management

          The management committee of the building estate will hold a special responsibility to ensure that the occupants of the building, its staff and maintenance workers are protected from LFG and that visitors to the site are also made aware as to the dangers and the precautions required to be taken.

          Of primary importance to satisfactorily upholding this responsibility will be to ensure that strict procedures for maintaining control over all temporary and /or permanent works proposed at the site are reviewed with regard to the LFG hazard. This needs to be accompanied by a comprehensive contingency plan in case of incidents, including liaison with EPD officers, Fire Services Department, Landfill Restoration Contractors and others, as necessary.

          All construction and maintenance (including utilities) personnel working at the site should be made aware of the hazards of LFG and its possible presence on site. This should be achieved through a combination of posting warning signs in prominent places and also by access to detailed information on LFG hazards and the designs and procedural means by which these hazards are being minimized on site. In addition, entry to confined spaces such as refuse/store rooms, drainage manholes etc. should be preceded by a period of “airing” the space by opening the door widely allowing fresh air to enter. Where appropriate, monitoring of gas should also precede entry.

          Any proposed modifications or additions to the building structure should be subject to a further assessment of LFG hazard, particularly in areas where a gas membrane has been installed. Any penetrations of the membrane must be repaired as soon as possible after detection or works completion using similar products.

          The building management company should also make arrangement with Landfill Restoration Contractor so that they are advised of all situations which may potentially threaten the safety of the building occupants resulting from any accidents or failures at the landfill site. The building management company should also have available suitable gas monitoring equipment for any ad hoc investigations necessary relating to LFG and be in a position to undertake any future routine monitoring of gas which may be considered necessary soloing completion of the defects correction period.

          To ensure that all the above protection and precautionary measures and issues pertaining to LFG are properly and consistently addressed by future users and owners of the site, it is recommended that a comprehensive LFG hazard  management system be developed by the owner of the building or its property management agency. The system should be developed by the developers of the sites as part of the QLFGHA before the occupation of the building and implemented during its operational phase.

To minimize the risk of LFG

hazards to the occupants,

maintenance personnel,

visitors and other users

within MTLL and its 250m

Consultation Zone

Government /

Developer

within MTLL

and its 250m

Consultation

Zone

Buildings within MTLL

and its 250m

Consultation Zone

Operation

phase

N/A

Cultural Heritage (Pre-construction Phase)

S11.6.1

CH1

Undertaking Further Archaeological Survey to Cover the Outstanding Areas

Further archaeological surveys to cover the outstanding areas of the not-yet-surveyed-area with medium archaeological potential located in the areas with proposed development as presented in Figure 11.9 should be implemented after land resumption to confirm and verify the findings of the EIA.  The survey should be conducted by a professional archaeologist and prior to fieldwork commencement, the archaeologist should obtain a Licence to Excavate and Search for Antiquities from the Authority under the AM Ordinance.  It should be noted that the scope of further archaeological survey is based on the current proposed alignment.  Any additional works areas which have not been covered by the current archaeological impact assessment should be covered as soon as possible.   Subject to the findings of the archaeological survey to be conducted after land resumption, additional mitigation measures would be designed and implemented before the commencement of construction works to mitigate the adverse impact.

To confirm and verify the findings of the EIA

Project Proponent/ Contractor/ Qualified Archaeologist

In the not-yet-surveyed-areas with medium archaeological potential located in the areas within Areas D1-11, A3-5, A3-6, B1-1, and B1-7,

After land resumption but before construction 

N/A

 

S11.6.1

CH2

Undertaking Survey-cum-Rescue Excavation

A Survey-cum-Rescue Excavation should be conducted after land resumption and before the commencement of construction works to define the precise archaeological deposits extent and to preserve the archaeological resources by record.  The excavation should be conducted by a professional archaeologist and prior to fieldwork commencement, the archaeologist should obtain a Licence to Excavate and Search for Antiquities from the Authority under the AM Ordinance.

To define the precise archaeological deposits extent and to preserve the archaeological resources as far as possible

Project Proponent/ Contractor/ Qualified Archaeologist

In KTN NDA, for Site 3 and In FLN NDA for Site 5.

After land resumption but before construction commencement  of the zone

N/A

S11.6.1

CH3

Undertaking Preservation in-situ for Site 7

Preservation in-situ of the cultivation deposits in Site 7 is proposed.  If disturbance to the site by the design of the Central Park is unavoidable, further archaeological survey should be conducted after land resumption prior to the pre-construction stage to assess the feasibility to incorporate Site 7 into the design of the development plan of the proposed zone. Appropriate followup actions, including preservation of the significant archaeological deposits in-situ in the Central Park, would then be considered with the consent of AMO. 

 

The recommended mitigation measure of preservation in-situ with further archaeological survey should be conducted by a professional archaeologist and prior to fieldwork commencement, the archaeologist should obtain a Licence to Excavate and Search for Antiquities from the Authority under the AM Ordinance.

To preserve the archaeological resources as far as possible.

Project Proponent/ Contractor/ Qualified Archaeologist

Site 7 in FLN NDA

After land resumption prior to preconstruction stage of the proposed Central Park (Area C2-8, Zoning O)

N/A

S11.6.1

CH4

Undertaking Induction Training

Induction training should be provided to the construction Contractor before the commencement of the excavation works in Spots A, D, F to H.  An induction will be conducted as part of the environmental health and safety induction programme to all site staff before they are deployed on site.  The induction will include an introduction on the historical development of the Site, the possible archaeological remains that may be encountered during ground excavation works as well as the reporting procedures in case suspected archaeological remains are identified.  A set of the presentation material (in the form of power point presentation) with content details will be prepared by an archaeologist and submitted to AMO for reference and record purpose. The first induction briefing will be video recorded and it will be used as induction briefing material for new site staff.

To preserve the archaeological resources as far as possible

Project Proponent/ Contractor/ Qualified Archaeologist

Spots A, D, F  to H

Before the commencement of the excavation works and before site staff are deployed on site 

N/A

S11.6.1

 

CH5

Undertaking Archaeological Impact Assessment before Construction at A1

 

It is recommended that an Archaeological Impact Assessment to be conducted in the impacted area in Area B1-8 and B1-9 at A1 (Sheung Shui Wa Shan Site of Archaeological Interest) after land resumption and before construction when detail construction work information is available to determine the need for further archaeological follow up actions.

 

To define the precise archaeological deposits extent and to preserve the archaeological resources as far as possible

Project Proponent/ Contractor/ Qualified Archaeologist

 

Area B1-8 and B1-9 zoned as R4 and R3 in A1 

After land resumption but before construction

N/A

S11.6.1

CH6

Undertaking Archaeological Impact Assessment before Construction within A1 but except Area B1-8 and B1-9 

Should there be any development work within the Sheung Shui Wa Shan Site of Archaeological Interest, it is recommended that an Archaeological Impact Assessment is required after land resumption and before construction when detail construction work information is available to determine the need for further archaeological follow up actions.

To define the precise archaeological deposits extent and to preserve the archaeological resources as far as possible.

Project Proponent/ Contractor/ Qualified Archaeologist

Area within A1 except Area B1-8 and B1-9 in R4 &R3 zoning

After land resumption but before construction

N/A

S11.6.2

CH7

Undertaking baseline condition survey and baseline vibration impact assessment

In case any potential vibration impact on any nearby built heritage features are identified during the pre-construction stage of the Project, prior to commencement of construction works, a baseline condition survey and baseline vibration impact assessment should be conducted by a qualified building surveyor or a qualified structural engineer to define the vibration limit (a vibration limit at 7.5mm/s could be adopted for graded historic buildings) and to evaluate if construction vibration monitoring and structural strengthening measures are required during construction phase so as to ensure the construction performance meets with the vibration standard stated in the EIA report.  The condition survey of graded historic building should be submitted to AMO for information.

To minimize the vibration impacts during preconstruction stage on any identified potential vibration impacted built heritage features

Project Proponent/ Contractor

G303 and G308

Preconstruction stage before commencement of construction works during Schedule 3 study

N/A

S11.6.2

CH8

Undertaking baseline condition survey and baseline vibration impact assessment

In case any potential vibration impact on any nearby built heritage features are identified during the pre-construction stage of the Project, prior to commencement of construction works, a baseline condition survey and baseline vibration impact assessment should be conducted by a qualified building surveyor or a qualified structural engineer to define the vibration limit (a vibration limit at 7.5mm/s and 15mm/s could be adopted for graded historic buildings and historic buildings respectively) and to evaluate if construction vibration monitoring and structural strengthening measures are required during construction phase so as to ensure the construction performance meets with the vibration standard               stated in the EIA report.  The condition survey of graded historic building should be submitted to AMO for information.

To minimize the vibration impacts during preconstruction stage on any identified potential vibration impacted built heritage features

Project Proponent/ Contractor

KT57, FL05, FL18, and FL2

Preconstruction stage before commenceme nt of construction works

N/A

S11.6.2

CH9

Conducting Photographic and Cartographic Records Prior to Removal/Relocation of Impacted Built Heritages

Prior to removal/relocation of the directly impacted historical buildings and cultural/historical landscape features, photographic and cartographic records should be conducted to preserve them by record.  Liaison with and obtaining agreement from the descendants of these features will be carried out the Project Proponent.

To preserve the directly impacted sites by record prior to their removal / relocation 

Project Proponent/ Contractor 

Ancillary structures of G303, HKT01, HKT02, Entrance Gate of HKT03, HKT04, KT01 to KT10, KT13, KT36, KT39, KT40, KT41, KT43, KT45,  KT47, KT50, KT54, KT62 to KT63, KT69, FL01, FL16, and FL35

Prior to Removal / Relocation of features before commenceme nt of construction works during Schedule 3 study

N/A

S11.6.2

CH10

 

Conducting Photographic and Cartographic Records Prior to Removal/Relocation of Impacted Built Heritages
Prior to removal/relocation of the directly impacted historical buildings and cultural/historical landscape features, photographic and cartographic records should be conducted to preserve them by record. Liaison with and obtaining agreement from the descendants of these features will be carried out by the Project Proponent.   

To preserve the directly impacted sites by record prior to their removal / relocation 

Project Proponent/ Contractor

 

KT12 and KT61

Prior to Removal / Relocation of features before commencement of construction works

N/A

S11.6.2

CH11

Relocation of Built Heritages Relocation of built heritages to a reasonable location nearby may be required.  

To preserve the directly impacted sites by relocation

Project Proponent/ Contractor

HKT01, HKT02, Entrance Gate of HKT03

After the photographic and cartographic records and before commencement of construction works

N/A

S11.6.2

 

CH12

Drainage System and Access Route Design For the retained built heritage items in developable area, drainage system and access route would be designed to prevent the persevered flooding and maintain the accessibility to the built heritage.

To prevent the persevered flooding and maintain the accessibility to the built heritage

Contractor /Detailed Design consultant

 

The retained built heritage items

Pre-construction phase

N/A

Cultural Heritage (Construction Phase)

S11.6.1

CH13

Inform Upon Archaeological Discovery

Pursuant to the Antiquities and Monuments Ordinance, the construction Contractor should inform the AMO immediately in case of discovery of antiquities or supposed antiquities in the course of excavation works in construction phase.  

Special attention should be given to areas evaluated to have archaeological potential or significance.

Contractor

All soil excavation works

Immediately upon discovery during excavation works

 

N/A

S11.6.2

CH14

Watertable Monitoring

Since the construction works and development activities may induce change in the watertable. It is recommended the Contractor should ensure that the change of watertable induced by the construction works and development activities will not result in settlement of built heritage.

To minimize the potential impacts to the built heritage items by the change of watertable induced by the works during the Construction phase

Contractor

Within NDAs

Construction phase

 

N/A

 

S11.6.2

CH15

Conducting Construction Vibration Monitoring and Structural Strengthening Measures

Construction vibration monitoring and structural strengthening measures should be conducted during Construction phase based on the assessment result of baseline condition survey and baseline vibration impact assessment, so as to ensure the construction performance meets with the vibration standard stated in the EIA report.

To minimize the potential impacts during Construction phase on any identified potential vibration impacted built heritage features

Contractor

Identified potential vibration impacted built heritage features

Construction phase, with details specified in baseline condition survey and baseline vibration impact assessment

 

N/A

 

 

Landscape and Visual Impact (Detailed Design, Prior to Construction, Construction and Operation Phases)

S.12.9

LV1

General Good Practice Measures - For areas unavoidably disturbed by the Project on a short term basis e.g. works areas, the general principle to try and restore these to their former state to suit future land use, should be adhered to.

With regard to topsoil, where identified, it should be stripped, treated appropriately, and where suitable and practical stored for re-use in the construction of the soft landscape works such as roadside amenity strips, and open space sites.

 

 

Detailed design consultant/ Contractor

Throughout NDAs,

Prior to Construction, Construction & for all planting, this should be installed as the areas become available, to achieve early establishment

 

 

N/A

 

 

 

 

 

S.12.9 MM1

LV2

Minimum Topographical Change –To minimize landscape and visual impacts, the footprint and elevation of such elements should be optimized to reduce topographical/ landform changes, as well as reduce land take and interference with natural terrain. Where there is a need to significantly cut into the existing landform, retaining walls should be considered as well as cut slopes, to minimize landform changes and land resumption, while also considering visual amenity. Earthworks and engineered slopes should be designed to be a visually interesting landform, compatible with the surrounding landscape and to mimic the natural contouring and terrain e.g. introduction and continuation of natural features such as spurs and ridges where appropriate, to support assimilation with the hillside setting.

Reduce topographical changes and minimize land resumption

Government / Detailed Design Consultant/ Contractor

 

Throughout NDAs, particularly for reservoirs

Prior to Construction

N/A

 

 

 

 

 

 

 

 

S.12.9 MM2

LV3

Detailed Design (Visual) –The footprint and massing of development components and the works area should also be kept to a practical minimum and the detailed design of development components for Construction phase should follow the Sustainable Building Design Guidelines.  The form, textures, finishes and colours of the proposed development components should aim to be compatible with the existing surroundings.  To improve visual amenity designs should be aesthetically pleasing and treatment of structures also improve visual amenity.  For example, natural building materials such as stone and timber, should be considered for architectural features, and light earthy tone colours such as shades of green, shades of grey, shades of brown and off-white should also be considered to reduce the visibility of the development components, including all roadwork, buildings and noise barriers.  In addition, the design of structures should consider green roofs were feasible, following stated guidelines.   All Noise barriers, particularly noise barriers but also any barriers proposed for ecological impact mitigation,  should be kept to a practical minimum,  and be of such a designed as to integrate as well as possible into the surrounding visual context and be as low as practical to minimize blocking views.  Noise barrier design, including vertical, cantilever or curved, and noise enclosures including semi-enclosure and full enclosure, at grade and/ or elevated, should follow the guidelines stated.   Construction time frame should also be considered and designs seek to keep it to a practical minimum. 

Improve visual amenity of the new buildings, NDAs in general and integrate as best possible into the surrounding landscape

Detailed Design Consultant

Throughout NDAs

Prior to Construction

N/A

 

S12.9 MM14.4

LV 4

Avoid affecting Watercourses – In the detailed design, consideration should be made of watercourses, to minimize any impacts e.g. at new bridge crossings, viaducts, road alignment etc. Guidelines stated should be followed.

For example, for the stream at Siu Hang San Tsuen in FLN NDA, much of the stream is located underneath the viaduct for the proposed Fanling Bypass. In order to avoid impacts to the stream, the detailed final design of the viaduct should follow guidelines and ensure that no viaduct footings or other structures are placed in the stream.

Bridges and box culverts should also be used to minimize the necessity of watercourse modification and protect the watercourses where necessary.

Avoid direct impacts to watercourses

Detailed Design Consultant/ Contractor

All watercourses, particularly  the stream at Siu Hang San Tsuen that will flow under the Fanling Bypass Eastern Section

Prior to Construction and Construction Phase

N/A

 

 

 

 

 

Landscape and Visual (Construction)

S.12.9 MM3

LV5

Open Space Provision - the principles adopted in the RODP planning ensure that public open space systems are incorporated. All requirements for open space areas stipulated in the planning documents for the formulation of the Preliminary Layout Plan should be adhered to.

Reprovision of open space. Enhance visual amenity of the area and improve the overall landscape character

Government Developer/ Detailed Design Consultant/ Contractor/

Onsite as stipulated in the planning documents for the formulation of the Preliminary Layout Plan

Prior to Construction and Construction Phas

N/A

S.12.9 MM4

LV6

Tree Protection & Preservation – Exiting trees to be retained within the Project Site should be carefully protected during construction.  In particular OVTs will be preserved according to ETWB Technical Circular (Works) No. 29/2004. Detailed Tree Protection Specification shall be provided in the Contract Specification. Under this specification, the Contractor shall be required to submit, for approval, a detailed working method statement for the protection of trees prior to undertaking any works adjacent to all retained trees, including trees in Contractor’s works areas.

A detailed tree survey will be carried out for the Tree Removal Application (TRA) process which will be carried out at the later detailed design stage of the Project.  The detailed tree survey will propose which trees should be retained, transplanted or felled and will include details of tree protection measures for those trees to be retained

Protect and Preserve Trees

Government / Detailed Design Consultant/ Contractor

Onsite

Prior to Construction and Construction Phase

N/A

 

 

 

 

 

 

 

 

 

 

 

 

S.12.9 MM5

LV7

Tree Transplantation – Trees unavoidably affected by the Project works should be transplanted where practical. Trees should be transplanted straight to their final receptor site and not held in a temporary nursery as far as possible.

 

A detailed Tree Transplanting Specification shall be provided in the Contract Specification, where applicable. Sufficient time for necessary tree root and crown preparation periods shall be allowed in the project programme.

A detailed transplanting proposal will be submitted to relevant government departments for approval in accordance with ETWBTC 2/2004 and 3/2006 and final locations of transplanted trees should be agreed prior to commencement of the work.

 

For trees associated with highways e.g. roadside planting along highways, that are unavoidably affected and should be transplanted, HyD HQ/GN/13 ‘Interim Guidelines for Tree Transplanting Works under Highways Department's Vegetation Maintenance Ambit’ should be referred to.

Transplant Trees where suitable for transplantation

Government / Detailed Design Consultant/ Contractor

Onsite where possible.  Otherwise consider offsite locations

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S.12.9 MM6

LV8

Slope Landscaping – Site formation should be reduced as far as possible.  Seeding of modified slopes should be done as soon as grading works are completed to prevent erosion and subsequent loss of landscape resources and character.  Woodland tree seedlings and/ or shrubs should be planted where slope gradient and site conditions allow.  

 

In addition, landscape planting should be provided for the retaining structures associated with modified slopes where conditions allow.  All slope landscaping works should comply with GEO Publication No. 1/2011-Technical Guidelines on Landscape Treatment for Slopes.

To avoid substantial slope cutting and fill slopes.

To prevent erosion and subsequent loss of landscape resources and character.

To ensure man-made slopes are as visually amenable as possible.  

Government / Detailed Design Consultant/ Contractor

Onsite

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

 

S.12.9 MM7

LV9

Compensatory Planting – Compensatory tree planting for felled trees shall be provided to the satisfaction of relevant Government departments.  Required numbers and locations of compensatory trees shall be determined and agreed separately with Government during the Tree Removal Application process under ETWBTC 3/2006.  

 

Compensatory planting is proposed at the potential open areas such as open spaces, amenity areas, open areas of the streetscapes, as well as the open areas within development lots.

Compensatory planting for shrubs should be considered in suitable locations. Native species such as Melastoma malabathricum, Diospyros vaccinioides, Gardenia jasminoides, Ixora chinensis, Ligustrum sinense, Litsea rotundifolia, Melastoma dodecandrum, Atalantia buxifolia, Rhodomyrtus tomentosa, Rhaphiolepis indica, and Rhododendron simsii are suggested.

Compensate for trees and shrubs lost due to the Project.

Government / Detailed Design Consultant/ Contractor

Onsite where possible.  Otherwise consider offsite locations

 

Prior to Construction, Construction Phase & Maintenance in Operation Phase 

N/A

S.12.9 MM8

LV10

Woodland Compensatory Planting –Specific Woodland compensatory planting is proposed for any areas of quality woodland that are unavoidably affected by the Project. The location and design of the woodland compensatory planting will principally be within habitats of lower value such as upland grassland. The proposed locations are identified, for example, on the foothills of Tai Shek Mo, and on the higher ground of Fung Kong Shan in KTN NDA; along Fanling Bypass; and a small area in the northern FLN NDA.

 

The intention of the compensatory woodland will be to recreate areas of quality woodland, not necessarily to compensate for loss of trees on a like for like basis (See E18 & E27 also).

 

Native tree species are suggested for planting in the appropriate locations, including Ailanthus fordii, Bischofia javanica, Castanopsis fissa, Celtis sinensis, Cinnamomum burmannii, Cinnamomum camphora, Xanthoxlyum avicennaeHibiscus tiliaceus, Liquidambar formosana, Sapium discolor, Schefflera heptaphylla and Ilex rotunda. In addition some understory vegetation may be planted including shrubs such as Atalantia buxifolia, Diospyros vaccinioides, Gardenia jasminoides, Ixora chinensis, Ligustrum sinense, Litsea rotundifolia, Melastoma malabathricum, Melastoma dodecandrum, Rhodomyrtus tomentosa, Rhaphiolepis indica, and Rhododendron simsii.

 

The area allocated for compensatory woodland planting allows in part for the fact that it will take some time for the compensatory planting to achieve the landscape and ecological function and value of the area to be lost. In addition, it allows for the fact that not all of the areas identified for planting will prove to be plantable, by virtue of topography and ground conditions and, especially, because though the areas identified are largely grassland it is inevitable that these areas will already support some patches of trees and shrubs which would be inappropriate for further planting.

 

 

 

 

N/A

S.12.9 MM9

LV11

Vertical Greening – Planting of climbers to grow up vertical surfaces were appropriate (e.g. building edges, piers).

Soften hard surfaces and facilities

Government / Developer/ Detailed Design Consultant/ Contractor

On appropriate structures

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

S.12.9 MM10

LV12

Green Roof – Roof greening where appropriate should be established on proposed buildings as per the guidelines stated. These guidelines provide further details including information regarding structural loading, design, maintenance, etc. considerations as well as providing information on what types of plants might be suitable.

 

 

Reduce exposure to untreated concrete surfaces and particularly mitigate visual impact to VSRs at high levels. Provide greening.

Government / Developer/ Detailed Design Consultant/ Contractor

On appropriate buildings

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

S.12.9 MM11

LV13

Screen Planting – Tall screen/buffer trees and shrubs should be planted. This measure may additionally form part of the compensatory planting.

To screen proposed structures such as roads and buildings.  Improve compatibility with the surrounding environment and create a pleasant pedestrian environment

Government / Detailed Design Consultant/ Contractor

Along roads, around suitable built structures, or around VSRs to contain their view out to the NDA structures.

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

S.12.9 MM12

LV14

Road Greening –For viaducts, soft landscaping should be provided to soften the hard, straight edges (for climbers used to cover the vertical, hard surfaces of the piers – see MM9 Vertical Greening) and shade tolerant plants should be planted, where light is sufficient, to improve aesthetic value of areas under viaducts. Both at grade planting and use of elevated planters should be considered for the soft landscaping of viaducts, taking into account the preference to minimize the overall viaduct bulk and integrate architectural forms and textural finishes which improve aesthetics.

 

For at grade roads, planting should be considered along central dividers and on road islands e.g. in the middle of roundabouts. (Roadside planting i.e. at the road edge and not in the central divider or road island, is considered part of Screen Planting)

To soften the hard, straight edges and provide greening along roads.

Government / Developer/ Detailed Design Consultant/ Contractor

On viaducts or along roads

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

S.12.9 MM13 & EIA Annex 13

LV15

Marsh/Wetland Compensation –The proposed Long Valley Nature Park (LVNP) will be designed and implemented to enhance on- wetland areas within the LVNP. (See E4,E15 and E25 also)

Also see LV16, LV17, and LV18 as wetland planting should be provided along the embankments and beds of modified/ reprovisioned watercourses.

Compensate for Marsh/ Wetland lost due to the Project.

Project Proponent/ Detailed Design Consultant/ Contractor/ Maintenance Authority

Onsite where possible. Otherwise consider offsite locations

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

S.12.9 MM14.1

LV16

Reprovision of Natural Stream – Where natural streams are unavoidably affected along some of their length, they can be diverted to avoid the proposed new developments and retain the integrity of the whole stream. Detailed design of any stream diversion should follow the Guidelines in ETWB Technical Circular (Works) No. 5/2005 (Protection of natural streams/rivers from adverse impacts arising from construction works) and appropriate construction methods should be used.

 

Two short stretches of the Ma Tso Lung Stream will be affected by Project in the KTN NDA; by the LMC Eastern Connection Road on the western border of Site F1-3 and further upstream by Site E-2.

 

At both these locations, the stream will be reprovisioned and maintain the flow between unaffected sections of the stream. The reprovisioned stream will be provided with a natural bed and banks, as well as having an area of marsh/ pool next to it and trees and shrubs further from the banks. (See E2, E14 and E24 also)

Achieve a natural stream, similar to existing, including wetland planting provision for embankments

Government / Developer/ Detailed Design Consultant/ Contractor

Streams and channelized watercourses

e.g. a Ma Tso Lung and Siu Han San Tsuen

Prior to Construction, Construction Phase & Maintenance in Operation Phase

N/A

S12.9 MM14.2

LV17

Stream Buffer Planting –Providing a minimum 10 m buffer with planting (where there is a general presumption against any development taking place) along streams where they flow close to developments, confers a degree of protection to the stream course and its associated vegetation.

 

For the stream at Ma Tso Lung in KTN NDA, the middle and upper sections will be designated as Green Belt zone where there is a general presumption against development as buffer to the stream.

 

For the stream at Siu Hang San Tsuen in FLN NDA, within the NDA boundary much of the