Appendix C - Environmental Mitigation implementation Schedule

Air Quality - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Nov 10

Dec 10

Jan 11

Air Quality during Construction

·  Restricting heights from which materials are dropped, as far as practicable to minimize the fugitive dust arising from unloading/loading.

During construction

V

V

V

·  All stockpiles of excavated materials or spoil of more than 50m3 shall be enclosed, covered or dampened during dry or windy conditions.

@

@

@

·  Effective water sprays shall be used to control potential dust emission sources such as unpaved haul roads and active construction areas.

@

@

V

·  All spraying of materials and surfaces shall avoid excessive water usage.

V

V

V

·  Vehicles that have the potential to create dust while transporting materials shall be covered, with the cover properly secured and extended over the edges of the side and tail boards.

V

V

V

·  Materials shall be dampened, if necessary, before transportation.

V

V

V

·  Travelling speeds shall be controlled to reduce traffic induced dust dispersion and resuspension within the site from the operating haul trucks.

V

V

V

·  Vehicle washing facilities shall be provided to minimize the quantity of material deposited on public roads.

V

V

V

 

Noise - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Nov 10

Dec 10

Jan 11

Noise during Construction

·  Use of silenced plant or plant equipped with mufflers or dampers in substitute of ordinary plant.

During construction

V

V

V

·  Reduce the number of equipment and their percentage on-time.

V

V

V

·  3.5 m and 5.5 m high temporary noise barrier at culvert construction work area (Figure 2a of the Environmental Permit).

V

V

V

·  3 m high temporary noise barrier along the northern edge of Bridge 12 at ground level (Figure 2b of the Environmental Permit).

V

V

V

·  2 m high temporary noise barrier along the northern edge of Bridge 12 at bridge level (Figure 2b of the Environmental Permit).

In progress

In progress

In progress

·  2.5 m high temporary noise barrier along TaiWo Service Road West (Figure 2c of the Environmental Permit).

In progress

In progress

In progress

·  3.5m high temporary noise barrier along Tai Wo Services Road West near Tai Hang (Figure2c of the Environmental Permit).

In progress

In progress

In progress

 

Water Quality - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Nov 10

Dec 10

Jan 11

Water quality during Construction

Demolition and reconstruction of bridges

During construction

 

 

 

·  Prevent off-site migration through use of sheet piles.

V

V

V

·  Minimize duration of works as far as practical.

V

V

V

·  All sewer and drainage connections should be sealed to prevent debris, soil, sand, etc, from entering public sewers/drains.

V

V

V

·  Site surface runoff should be settled to remove sand/silt before it is discharged into the existing storm drains.

V

V

V

River training works

 

 

 

·  lnspection and testing of water quality in the nullah on the Tai Po River.

N/A

N/A

N/A

Road Widening Works and Earthworks

 

 

 

·  Wastewater generated from any concrete batching washdown of equipment or similar activities should be discharged into foul sewers, after the removal of settable solids, and pH adjustment as necessary. All sewage discharges from the study area should meet the TM standards and approval from EPD through the licensing process is required.

V

V

V

·  Sand traps, oil interceptors and other pollution prevention installations should be provided, properly cleaned and maintained.

V

V

V

·  Runoff from exposed working areas, unfinished slopes and from unlined temporary channels should be directed to stilling basins and/or silt traps before discharging to the drainage outfalls.

V

V

V

·  Regular inspections of stilling basins and/or silt traps are required to ensure that sediment is not conveyed into the existing drainage system.

V

V

V

·  Open stockpiles should be covered with a tarpaulin cover.

V

V

V

·  During the wet season, any exposed top soils should be covered with a tarpaulin, shotcreted or hydroseeded.

V

V

V

·  Sand and silt from wash-water from vehicle washing should be settled out before discharging into storm drains.

V

V

V

·  Fuels should be stored in bunded areas such that spillage can be easily collected.

@

V

V

 

Waste - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Nov 10

Dec 10

Jan 11

Waste Management during Construction

General Waste

During construction

 

 

 

·  Transport of wastes off site as soon as possible.

V

V

@

·  Maintenance of accurate waste records

V

V

V

·  Minimization of waste generation for disposal (via reduction/recycling/re-use).

V

V

V

·  No on-site burning will be permitted.

V

V

V

·  Use of re-useable metal hoardings/signboards.

V

V

V

Vegetation from site clearance

 

 

 

·  Segregation of materials to facilitate disposal.

V

V

V

·  Mulching to reduce bulk and where possible review opportunities for the possible beneficial use within landscaping areas.

V

V

V

Demolition Wastes

 

 

 

·  Segregation of materials to facilitate disposal.

V

V

V

·  Appropriate stockpile management.

V

V

V

Excavated Materials

 

 

 

·  Segregation of materials to facilitate disposal / reuse.

V

V

V

·  Appropriate stockpile management.

V

V

V

·  Re-use of excavated material on or off site (where possible).

V

V

V

·  Special handling and disposal procedures in the event that contaminated materials are excavated.

N/A

N/A

N/A

Construction Wastes

 

 

 

·  Segregation of materials to facilitate recycling/reuse (within designated area in appropriate containers/stockpiles).

V

V

V

·  Appropriate stockpile management.

V

V

V

·  Planning to reduce over ordering and waste generation.

V

V

V

·  Recycling and re-use of materials where possible (e.g. metal, wood from formwork)

V

V

V

·  For material which cannot be re-used/recycled, collection should be carried out by an approved waste contractor for landfill disposal.

V

V

V

Bentonite Slurries

 

 

 

·  Bentonite slurries should be reused as far as possible.

N/A

N/A

N/A

·  Disposal in accordance with Practice Note For Professional Persons ProPECC PN 1/94.

N/A

N/A

N/A

Chemical Wastes

 

 

 

·  Storage within locked, covered and bunded area.

V

V

V

·  The storage area shall not be located adjacent to sensitive receivers e.g. drains.

V

V

V

·  Minimize waste production and recycle oils/solvents where possible.

V

V

V

·  A spill response procedure shall be in place and absorption material available for minor spillages.

V

V

V

·  Use appropriate and labelled containers.

V

V

V

·  Educate site workers on site cleanliness/waste management procedures.

V

V

V

·  lf chemical wastes are to be generated, the contractor must register with EPD as a Chemical Waste Producer.

V

V

V

·  The chemical wastes shall be collected by a licensed chemical waste collector.

V

V

V

Municipal Wastes

 

 

 

·  Waste shall be stored within a temporary refuse collection facility, in appropriate containers prior to collection and disposal.

V

V

V

·  Regular, daily collections are required by an approved waste collector.

V

V

V

 

Ecology - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Nov 10

Dec 10

Jan 11

Ecology during Construction

Accurate Delineation of Works Area

During construction

 

 

 

·  Boundaries of proposed works areas shall be clearly identified and separated from external areas by a physical barrier to prevent encroachment of adjacent habitats.

V

V

V

·  lndividual trees which fall within the works areas but which work plans show do not require removal are to be retained and fenced off to maximize protection.

V

V

V

Vegetation Clearance

 

 

 

·  No fires shall be lit within the works area for the purpose of burning cleared vegetation.

V

V

V

·  The Contractor shall give consideration to mulching the cleared vegetation for recycling within the works area / adjacent land.

V

V

V

Dust generation

 

 

 

·  Vehicle washing facilities to be provided at every discernible or designated vehicle exit point;

V

V

V

·  All temporary site access roads shall be sprayed with water to suppress dust as necessary;

@

V

V

·  All dusty materials should be sprayed with water immediately prior to any handling; and

V

V

V

·  All debris should be covered entirely by impervious sheeting or stored in a sheltered debris collection area.

V

V

V

Surface Run-off

 

 

 

·  Bund and cover stock piles to avoid run-off;

V

V

V

·  Channel any run-off through a system of oil, grease and sediment / silt traps and reuse water on site where ever practical;

V

V

V

·  All vehicle maintenance to be undertaken within a bunded area; and

N/A

N/A

N/A

·  Maximize vegetation retention on-site to maximize absorption (minimize transport).

V

V

V

 

Landscape and Visual Impact - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Nov 10

Dec 10

Jan 11

Landscape and Visual during Construction

Preservation of Existing Vegetation

During construction

 

 

 

·  Trees identified for retention within the project limit would be protected during the works

V

@

@

·  The tree transplanting and planting works shall be implemented by approved Landscape Contractors

V

V

V

Temporary Works Areas

 

 

 

·  Where feasible the works areas would be screened using hoarding and existing vegetation would be retained where possible to reduce the landscape and visual impacts arising from the construction activity. The landscape of these works areas would be restored following the completion of the construction phase.

V

V

V

Hoarding

 

 

 

·  A hoarding would be erected where practicable in the most visually sensitive locations to screen the temporary construction works from the local VSR's.

V

V

V

Top Soils

 

 

 

·  The works will result in disturbance to extensive areas of topsoil. Topsoil worthy of retention should be stockpiled for use following completion of the civil engineering works. lt should either be temporarily vegetated with hydroseeded grass or turned over on a regular basis.

N/A

N/A

N/A

Protection of Important Landscape Features

 

 

 

·  lmportant features such as temples, lsland House and kilns within the study area, although remote from the proposed works retained and adequately protected.

V

V

V

 

Legend: V = implemented;

x = not implemented;

@ = partially implemented;

N/A = not applicable – No such work was undertaken or no such material was used on site.