14.  IMPLEMENTATION SCHEDULE OF THE PROPOSED MITIGATION MEASURES

Table 14.1       Implementation Schedule for Air Quality Control

EIA Ref  #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

Construction Phase

 

 

 

 

 

 

 

S3.8.1

Implementation of dust suppression measures stipulated in Air Pollution Control (Construction Dust) Regulation.

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

Ÿ             every vehicle should be washed to remove any dusty materials from its body and wheels before leaving a construction site

Ÿ             the area where vehicle washing takes place and the section of the road between the washing facilities and the exit point should be paved with concrete, bituminous materials or hardcores

Ÿ             where a site boundary adjoins a road, streets or other accessible to the public, hording of not less than 2.4m high from ground level should be provided along the entire length except for a site entrance or exit

Ÿ             every stack of more than 20 bags of cement should be covered entirely by impervious sheeting places in an area sheltered on the top and the 3 sides

Ÿ             all dusty materials should be sprayed with water prior to any loading, unloading or transfer operation so as to maintain the dusty materials wet

Ÿ             the height from which excavated materials are dropped should be controlled to a minimum practical height to limit fugitive dust generation from unloading

Work site / during construction

Contractor

 

 

 

 

 

S3.8.1

Ÿ             the load of dusty materials carried by vehicle leaving a construction site should be covered entirely by clean impervious sheeting to ensure dust materials do not leak from the vehicle

Ÿ             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 construction

Contractor

 

Ö

 

 

EIAO-TM

Operational Phase

 

 

 

 

 

 

 

Nil  

 

 

 

 

 

 

 

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

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


Table 14.2       Implementation Schedule for Noise Control

EIA Ref  #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

S4.8.1

Use of quiet powered mechanical equipment

Work Sites / During Construction

Contractor

 

Ö

 

 

EIAO-TM, NCO

S4.8.5 – S4.8.6

Road paving - Adoption of quiet PMEs, movable noise barrier and scheduling of PMEs during normal teaching period, only one PME to be operated and the work area not less than 22m from NSR TLLF or cease operation of PMEs if work area less than 30m from NSR TLLF during examination period.  The barrier material shall have a surface mass of not less than 14 kg/m2 on skid footing with 25mm thick internal sound absorptive lining.

 

Work Site for road paving, road marking and construction of noise barrier in the vicinity of  NSR TLFF (The Church of Christ in China Tam Lee Lai Fun Memorial Secondary School) / During Construction

Contractor

 

Ö

 

 

EIAO-TM, NCO

S4.8.5 & S4.8.7

Road marking - Adoption of quiet PMEs and movable noise barrier during normal teaching period and examination period.  The work area should be located not less than 18m from NSR TLLF during examination period.  The barrier material shall have a surface mass of not less than 14 kg/m2 on skid footing with 25mm thick internal sound absorptive lining.

 

Work Site for road marking in the vicinity of  NSR TLFF / During Construction

Contractor

 

Ö

 

 

EIAO-TM, NCO

S4.8.5 & S4.8.8

Construction of noise barrier - Adoption of quiet PMEs and movable noise barrier during examination period, piling operation for construction of noise barrier would also be ceased during examination period.  The barrier material shall have a surface mass of not less than 14 kg/m2 on skid footing with 25mm thick internal sound absorptive lining.

 

 

Work Site for  construction of noise barrier in the vicinity of  NSR TLFF / During Construction

Contractor

 

Ö

 

 

EIAO-TM, NCO

S4.9.2

Good Site Practice:

Ÿ          Only well-maintained plant should be operated on-site and plant should be serviced regularly during the construction program.

Ÿ          Silencers or mufflers on construction equipment should be utilized and should be properly maintained during the construction program.

Ÿ          Mobile plant, if any, should be sited as far away from NSRs as possible.

Ÿ          Machines and plant (such as trucks) that may be in intermittent use should be shut down between works periods or should be throttled down to a minimum.

Ÿ          Plant known to emit noise strongly in one direction should, wherever possible, be orientated so that the noise is directed away from the nearby NSRs.

Ÿ          Material stockpiles and other structures should be effectively utilized, wherever practicable, in screening noise from on-site construction activities.

Ÿ          Scheduling the noisy work to be conducted in non-school hours or long holiday such as summer vacation as possible.

 

 

 

 

 

 

Work Sites / During Construction

Contractor

 

Ö

 

 

EIAO-TM, NCO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operational Phase

 

 

 

 

 

 

 

4.8.11

About 100m long of a 6m high cantilevered barrier with 3.5m cantilever inclined at 23° on the Kowloon bound of TMR.  

 

 

About 80m long of a 6m high cantilevered barrier with 2.5m cantilever inclined at 23° on the Yuen Long bound of TMR.  

 

 

 

Low Noise Surfacing on the ‘New’ road section of Tuen Mun Road at Tsing Tin Interchange (185m for Kowloon bound and 195m for Yuen Long bound)

 

Kowloon bound of TMR / Before commencement of operation of road project

 

Yuen Long bound of TMR / Before commencement of operation of road project

 

‘New’ road section of Tuen Mun Road/Before commencement of operation of road project

 

HyD

 

 

 

 

Ö

 

 

 

 

Ö

 

Ö

 

 

EIAO-TM

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

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

 


Table 14.3       Implementation Schedule for Water Quality Control

EIA Ref  #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

Construction Phase

 

 

 

 

 

 

 

S5.7.2

Measures for Tuen Mun River Channel

Ÿ          Site runoff would be directed towards regularly cleaned and maintained sand traps, silt traps and where appropriate.

Ÿ          Oil/grease separators to minimise risk of sedimentation and pollution to the River Channel.

Ÿ          Debris and rubbish generated on-site would be collected, handled and disposed of properly. 

Ÿ          The stockpile or temporary storage area and chemical waste storage area shall be located at least 30m away from Tuen Mun River Channel.

Work site / During the construction period

Contractor

 

Ö

 

 

ProPECC PN 1/94;

WPCO (TM-DSS)

S5.7.3

Construction Runoff and Drainage

The site practices outlined in ProPECC PN 1/94 “Construction Site Drainage” shall be implemented including:

Ÿ          Sand/silt removal facilities such as sand traps, silt traps or sediment basins shall be provided to remove sand/silt particles from runoff to meet the requirements of the Technical Memorandum standard under the Water Pollution Control Ordinance.  The design of silt removal facilities should be based on the guidelines provided in ProPECC PN 1/94.  All drainage facilities and erosion and sediment control structures should be inspected monthly and maintained to ensure proper and efficient operation at all times and particularly during rainstorms. 

Ÿ          Water pumped out from foundation excavations should be discharged into silt removal facilities.

Ÿ          Careful programming of the works to minimise surface excavations during the rainy season.  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 a tarpaulin or other means.  Other measures that need to be implemented before, during, and after rainstorms are summarized in ProPECC PN 1/94.

Ÿ          Exposed soil surface shall be protected by paving as soon as possible to reduce the potential of soil erosion.

Ÿ          Open stockpiles of construction materials on site shall be covered with tarpaulin or similar fabric during rainstorms.

Work site / During the construction period

Contractor

 

Ö

 

 

ProPECC PN 1/94;

WPCO (TM-DSS)

S5.7.4 – S5.7.5

Sewage from General Construction Activities

Debris and rubbish generated on-site shall be collected, handled and disposed of properly to avoid entering the nearby nullah and stormwater drains.  Stockpiles of cement and other construction material should be kept covered when not being used.

Oils and fuels should only be used and stored in designated areas which have pollution prevention facilities.  All fuel tanks and storage areas shall be provided with locks and be sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank.  The bund should be drained of rainwater after a rain event.

Work site / During the construction period

Contractor

 

Ö

 

 

ProPECC PN 1/94; WPCO (TM-DSS)

S5.7.6

Sewage Effluent

Temporary sanitary facilities, such as portable chemical toilets, shall be employed on-site.  A licensed contractor would be responsible for appropriate disposal and maintenance of these facilities.

Work site and adjacent water / During the design and construction period.

Contractor

Ö

Ö

 

 

WPCO

Operational Phase

S5.7.7

A surface water drainage system provided with adequately designed silt trap would be provided to collect road runoff. 

.

CWB/During design and operational period

CEDD/HyD

Ö

 

Ö

 

WPCO

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

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


Table 14.4       Implementation Schedule for Waste Management

EIA Ref  #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

Construction Phase

 

 

 

 

 

 

 

S6.6.1

Good Site Practices

Recommendations for good site practices during the construction activities include:

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

Ÿ          training of site personnel in proper waste management and chemical waste handling procedures;

Ÿ          provision of sufficient waste disposal points and regular collection for disposal;

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

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

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

Work site / During the construction period

Contractor

 

Ö

 

 

Waste Disposal Ordinance (Cap.354)

S6.6.2

Waste Reduction Measures

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:

Ÿ          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;

Ÿ          to encourage collection of aluminium cans, PET bottles and paper, separate labelled bins shall be provided to segregate these wastes from other general refuse generated by the work force;

Ÿ          any unused chemicals or those with remaining functional capacity shall be recycled;

Ÿ          use of reusable non-timber formwork to reduce the amount of C&D material.

Ÿ          prior to disposal of C&D waste, it is recommended that wood, steel and other metals shall be separated for re-use and / or recycling to minimise the quantity of waste to be disposed of to landfill;

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

Ÿ          plan and stock construction materials carefully to minimise amount of waste generated and avoid unnecessary generation of waste.

Work site / During planning and design stage, and construction stage

Contractor

Ö

Ö

 

 

 

S6.6.4

 

 

 

 

 

 

 

 

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. 

A collection area should be provided where wastes can be stored and loaded prior to removal from site.  An enclosed and covered area is recommended to reduce the occurrence of 'wind blow' light material. 

Work site / During the construction period

Contractor

 

Ö

 

 

Public Health and Municipal Services Ordinance (Cap. 132)

 

 

 

 

S6.6.5

Chemical Wastes

After use, chemical wastes (for example, cleaning fluids, solvents, lubrication oil and fuel) should be handled according to the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.  Spent chemicals should be collected by a licensed collector for disposal at the CWTF or other licensed facility in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

Work site / During the construction period

Contractor

 

Ö

 

 

Waste Disposal (Chemical Waste) (General) Regulation

 

Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes

S6.6.6 & 6.6.7

 

Construction and Demolition Material

Excavated fill material shall be reused on-site as backfill material as far as possible.  The material to be disposed at public fill reception facility shall be free from marine mud, household refuse, plastic, metals, industrial and chemical waste, animal and vegetable matter, and other material considered to be unsuitable by the Filling Supervisor.

Work site / During the construction period

Contractor

 

Ö

 

 

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

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

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

 


Table 14.5       Implementation Schedule for Hazard to Life

EIA Ref  #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

Construction Phase

 

 

 

 

 

 

 

S8.8.4

Ÿ     The number of workers on site during construction stage should be kept as the level as assessed in this report.

Ÿ     Emergency evacuation procedures should be formulated and Highways Department (HyD) should ensure all workers on site should be familiar with these procedures as well as the route to escape in case of gas release incident occur. Relevant Departments, such as Water Supplies Department and Fire Services Department, should be consulted during the development of Emergency procedures. Diagram showing the escape routes to a safe place should be posted in the site notice boards and at the entrance/exit of site.

Ÿ     The emergency procedures should specify means of providing a rapid and direct warning (e.g. Siren and Flashing Light) to construction workers in the event of chlorine gas release in the Tuen Mun Water Treatment Works (TMWTW).

Ÿ          The construction site officer of HyD should establish a communication channel with the TMWTW operation personnel during construction stage. In case of any hazardous incidents in the treatment works, operation personnel of TMWTW should advise the site officer to evacuate the construction workers.

Works area/ During construction phase

Contractor

 

Ö

 

 

-

S8.8.5

Induction Training should be provided to any staff before working on site at the Tsing Tin Interchange work site

Works area/During construction phase

Contractor

 

Ö

 

 

-

S8.8.6

Periodic drills should be coordinated and conducted to ensure all construction staffs are familiar with the evacuation procedures. Upon completion of the drills, a review on every step taken should be conducted to identify area of improvement.

Works area/ During construction phase

Contractor

 

Ö

 

 

 

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

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


Table 14.6       Implementation Schedule for Ecology

EIA Ref  #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

Dec

Construction Phase

 

 

 

 

 

 

 

S9.7.2

Construction activities would be confined to developed areas of low ecological value, and there would be no direct impact to other habitats within the Assessment Area.

Works area / During construction phase

Contractor

 

Ö

 

 

-

S9.7.4

To mitigate the noise impacts to habitats and associated wildlife within and adjacent to the proposed works area, quite mechanical plants and well-maintained plants should be used wherever possible. Noise-emitting construction plant should be installed away from the egretry as far as practical. Schedule of construction programme should be carefully planned to avoid noise-generating construction activities with high disturbance impact during the breeding seasons of the ardeids (i.e. mid-March to August).

Works area / During construction phase

Contractor

 

Ö

 

 

-

S9.7.5

Noise barrier should also be implemented to mitigate the noise impact in operation phase. To minimize the bird collision impact, precautionary and bird-friendly approach to noise barrier design should be implemented:

Ÿ          The transparent materials of the noise barriers would be non-glaring and not light-reflective.

Ÿ          Noise barrier panels would be with either tinted materials, embedded opaque stripes or superimposed patterns of thin opaque stripes.

Ÿ          Noise barrier would be made visible to birds, such as putting falcon stickers on the transparent panels.

Works area / during construction phase

Contractor

 

Ö

 

 

-

S9.7.7

Standard good site practice measures should be implemented throughout the construction phase. The measures should include:

Ÿ          Placement of equipment in designated works areas selected on existing disturbed land.

Ÿ          Construction activities should be restricted to the proposed works area that would be clearly demarcated.

Ÿ          The proposed works area should be reinstated immediately after completion of the works.

Ÿ          Open burning on proposed works sites is illegal, and should be strictly enforced.

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

Ÿ          Any soil contamination with fuel leaked from construction plants should be removed off-site.

Works area / during construction phase

Contractor

 

Ö

 

 

-

S9.7.8

To minimize the construction dust impact to the vegetation within and in vicinity of the proposed works area, the following mitigation measures as listed below should be implemented:

Ÿ          Regular watering should be used during the construction stage.

Ÿ          Any aggregate or dusty material storage piles should be completely covered.

Ÿ          Minimum practical height for dropping of excavated material should be applied.

Works area / During construction phase

Contractor

 

Ö

 

 

-

 

 

 

 

 

 

 

 

 

S9.7.9

To minimize the indirect impacts to the nearby Tuen Mun River Channel, the following measures should be implemented:

Ÿ          Any runoff and drainage water with high levels of suspended solids should be prevented from entering the nearby water-bodies.

Ÿ          Site runoff should be directed towards regularly cleaned and maintained silt traps and oil/grease separators to avoid and minimise the risk of sedimentation and pollution of the nearby stream courses and drainage culvert.

Ÿ          The silt and oil/grease separators should be appropriately designed for the local drainage and ground conditions.

Ÿ          Debris and rubbish generated on-site should be collected, handled and disposed of properly.

Works area / during construction phase

Contractor

 

Ö

 

 

-

S9.7.10

Compensatory planting of a ratio not less than 1:1 ratio in terms of quality and quantity should be provided to compensate for the loss of roadside trees due to the construction works.

Works area / during construction phase

Contractor

 

Ö

 

 

-

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

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


Table 14.7       Implementation Schedule for Landscape and Visual - Construction

EIA Ref  #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages

Relevant Legislation and Guidelines

Des

C

O

Dec

Construction Phase

 

 

 

 

 

 

 

For the Whole Project 

 

 

 

 

 

 

 

Table 10.6

 

 

 

 

 

CM1     Topsoil, where identified, should be stripped and stored for re-use in the construction of the soft landscape works, where practical.

Work site / During Construction Phase

HyD

Ö

Ö

 

 

EIAO-TM

Annex 10, 18

ETWB TCW 2/2004

ETWB TCW 3/2006

 

 

 

 

 

CM2     Existing trees to be retained on site should be carefully protected during construction.

Work site / During Construction Phase

HyD

Ö

Ö

 

 

CM3     Trees unavoidably affected by the works should be transplanted where practical.

Work site / During Construction Phase

HyD

Ö

Ö

 

 

CM4     Compensatory tree planting should be provided to compensate for felled trees.

Work site / During Construction Phase

HyD

Ö

Ö

 

 

CM5     Control of night-time lighting.

Work site / During Construction Phase

HyD

 

Ö

 

 

CM6     Erection of decorative screen hoarding compatible with the surrounding setting.

Work site / During Construction Phase

HyD

 

Ö

 

 

Operation Phase

Table 10.7

 

 

 

OM1     Aesthetic design of road-related structures, including noise barriers and enclosure.

Work site / During Design Stage and Operation Phases

HyD

Ö

Ö

Ö

 

EIAO-TM

Annex 10, 18

ETWB TCW 2/2004

ETWB TCW 3/2006

OM2     Shrub planting to soften and screen proposed roads and associated structures.

Work site / During Design Stage and Operation Phases

HyD/LCSD

Ö

Ö

Ö

 

OM3     Tree and Shrub Planting in the central strip

Work site / During Design Stage and Operation Phases

HyD

Ö

Ö

Ö

 

OM5     Area reinstated to match former condition

Work site / During Design Stage and Operation Phases

HyD

Ö

Ö

Ö

 

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

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