Appendix A1

Implementation Schedule for Recommended Mitigation Measures

EIA Ref.

EM&A Log Ref.

Environmental Protection Measures

Location / Duration of Measure / Timing of Completion of Measures

Implementation Agent

Implementation Stage

Relevant Legislation & Guidelines

Des

C

O

                 
   

CONSTRUCTION PHASE MITIGATION MEASURES

           

3.5

3.8

NOISE (Construction Phase)

           
   

Use of Quiet Plant

           

3.5.21

3.8.2

The use of quiet plant (also referred as silenced equipment) can provide significant reduction in noise level. Quiet plant is defined as PME whose actual sound power level is less than the value specified in TM on Noise from Construction Work other than Percussive Piling for the same piece of equipment. To allow the Contractor some flexibility to select equipment to suit his needs, it is considered too restrictive to specify which specific items of silenced equipment to be used for the construction operations. It should be noted that various types of silenced equipment can be found in Hong Kong and are readily available on the market. BS 5228 also provide examples of quiet construction plant and their sound power level.

Site formation works for Lok Wo Sha near NSR C3 – Li Po Chun United World College; Construction of Road D1 (including the two slip roads to Road T7) and local roads near NSRs C1(To Tau), C2(Wu Kai Sha), C3(Li Po Chun United World College) & C7(future Wu Kai Sha Station developmet); building construction works near NSR C6(Monte Vista) / During the whole construction period / Before start of construction works

Construction Contractor

 

ü

 

TMEIA

   

Use of Movable (Mobile) Barriers

           

3.5.23

3.8.3

Movable (mobile) barriers can be used to screen NSRs from particular items of plant or noisy operations. Movable barriers of 3 to 5 m height with a small cantilevered upper portion and skid footing can be located within a few metres of stationary plant (e.g. generator, compressor) and within about 5 m or more of a mobile equipment (e.g. excavator, mobile crane), such that the line of sight to the NSR is blocked by the barriers. It would be possible for the Contractor to provide purpose-built noise barriers or screens constructed of appropriate material with a minimum superficial density of 15 kg/m2 located close to operating equipment. Certain types of stationary equipment, such as generators and compressors, can be completely screened by portable barriers giving a total noise reduction of 10 dB(A) or more.

Construction of Road D1 (including the two slip roads to Road T7) and local roads near NSRs C1 & C3 / During the whole construction period / Before start of construction works

Construction Contractor

 

ü

 

TMEIA

   

Use of Temporary Noise Screening Structures or Purpose-built Temporary Noise Barriers

           

3.5.25

3.8.4

Since some of the NSRs close to the Project area are typically low-rise village houses, it would be effective to have noise screening structures or temporary noise barriers purposely-built along the site boundary to provide additional protection to NSRs close to the construction site. This could be in the form of purposely-built site hoarding constructed from appropriate materials with a minimum superficial density of 15 kg/m2. Merely using plywood would not be effective. The noise barrier should have a vertical height of 3.5 m or above, have no gaps or opening at joints. The Contractor should regularly inspect and maintain the noise barrier to ensure its effectiveness.

Construction of Road D1 (including the two slip roads to Road T7) and local roads near NSRs C1 & C3 / During the whole construction period / Before start of construction works

Construction Contractor

 

ü

 

TMEIA

   

Good Site Practices

           

3.5.27

3.8.5

(a) Noisy equipment and activities should be sited by the Contractor as far from close-proximity sensitive receivers as practical. Prolonged operation of noisy equipment close to dwellings should be avoided.

All construction site / During the whole construction period / Before start of construction works

Construction Contractor

 

ü

 

TMEIA

   

(b) The Contractor should minimise construction noise exposure to the schools (especially during examination periods) as much as possible. The Contractor should liaise with the school and the Examination Authority to ascertain the exact dates and times of all examination periods during the course of the contract and to avoid noisy activities during these periods.

           
   

(c) Noisy plant or processes should be replaced by quieter alternatives where possible. Silenced diesel and gasoline generators and power units, as well as silenced and super-silenced air compressors, can be readily obtained.

           
   

(d) Noisy activities should be scheduled to minimise exposure of nearby sensitive receivers to high levels of construction noise. For example, noisy activities can be scheduled for midday, or at times coinciding with periods of high background noise (such as during peak traffic hours).

           
   

(e) Idle equipment should be turned off or throttled down. Noisy equipment should be properly maintained and used no more often than is necessary.

           
   

(f) The power units of non-electric stationary plant and earth-moving plant should be quietened by vibration isolation and partial or full acoustic enclosures for individual noise-generating components.

           
   

(g) Construction activities should be planned so that parallel operation of several sets of equipment close to a given receiver is avoided, thus reducing the cumulative impacts between operations. The numbers of operating items of powered mechanical equipment should be minimised. Noise can be reduced by increasing the distance between the operating equipment and the NSRs or by reducing the number of items of equipment and / or construction activity in the area at any one time.

           
   

(h) Construction plant should be properly maintained (well-greased, damage and worn parts promptly replaced) and operated. Construction equipment often has silencing measures built in or added on, e.g. bulldozer silencers, compressor panels, and mufflers. Silencing measures should be properly maintained and utilised. Where possible, rubber or damping materials should be introduced between metal panels to avoid rattle and reverberation of noise.

           
   

(i) Equipment known to emit sound strongly in one direction, should where possible, be oriented so that the noise is directed away from nearby NSRs.

           
   

(j) Material stockpiles and other structures (such as site offices) should be effectively utilised to shield construction noise. Noise can also be reduced by construction of temporary noise barriers which screen the lower floors from viewing the sites. Temporary noise barriers should be installed at active parts of construction areas where construction equipment is being operated in close proximity to NSRs.

           
   

(k) The Contractor should devise, arrange methods of working and carry out the works in such manner as to minimise noise impacts on the surrounding environment, and should provide experienced personnel with suitable training to ensure that these measures are implemented properly.

           

4.6

2.9

AIR QUALITY (Construction Phase)

           

4.6.13

2.9.1

Dust Mitigation Measures

(i) The Contractor shall observe and comply with the Air Pollution Control Ordinance and its subsidiary regulations, particularly the Air Pollution Control (Construction Dust) Regulation.

(ii) The Contractor shall undertake at all times to prevent dust nuisance as a result of his activities. Effective dust suppression measures should be employed to ensure that the air quality, at the boundary of his site and at any ASRs, complies with the Hong Kong Air Quality Objectives.

Whole construction sites / Whole construction periods / Before start of construction works

Construction Contractor

 

ü

 

Air Pollution Control Ordinance, Air Pollution Control (Construction Dust) Regulation

   

(iii) The Contractor shall ensure that there will be adequate water supply / storage for dust suppression purposes.

           
   

(iv) The Contractor shall frequently clean and water the site to minimize fugitive dust emissions.

           
   

(v) Effective water sprays shall be used during the delivery and handling of aggregate, and other similar materials, when dust is likely to be created and to dampen all stored materials during dry and windy weather.

           
   

(vi) Watering of exposed surfaces shall be exercised as often as possible depending on the circumstance.

           
   

(vii) Areas within the site where there is a regular movement of vehicles must be regularly watered.

           
   

(viii) Where dusty materials are being discharged to vehicle from a conveying system at a fixed transfer point, a three-sided roofed enclosure with a flexible curtain across the entry shall be provided. Exhausted fans shall be provided for this enclosure and vented to a suitable fabric filter system.

           
   

(ix) The Contractor shall restricted all motorized vehicles within the site, excluding those on public roads, to a maximum speed of 15 km per hour and confine haulage and delivery vehicles to designated roadways inside the site.

           
   

(x) Wheel washing facilities shall be installed and used by all vehicles leaving the site. No earth, mud, debris, dust and the like shall be deposited on public roads. Water in wheel cleaning facility shall be changed at frequent intervals and sediments shall be removed regularly. The Contractor shall submit detailed proposals for the wheel cleaning facilities to the Engineer prior to construction of the facility. Such wheel washing facilities shall be usable prior to any earthworks excavating activity on the site. The Contractor shall also provide a hard-surfaced road between any washing facility and the public road.

           
   

(xi) The Contractor shall devise, arrange methods of working and carrying out the works in such a manner so as to minimize dust impacts on the surrounding environment, and shall provide experienced personnel with suitable training to ensure that these methods are implemented.

           
   

(xii) All site vehicles’ exhausts should be directed vertically upwards or directed away from the ground.

           
   

(xiii) All stockpile of dusty material shall be either: (a) covered entirely by impervious sheeting; (b) placed in area sheltered on the top and the three sides; or (c) sprayed with water or a dust suppression chemical so as to maintain the entire surface wet.

           

5.4

4.9

WATER QUALITY (Construction Phase)

           

5.4.18

4.9.2

Suspended solids in runoff should be reduced by the provision of a good surface drainage system with suitably designed catchpits to retain sediment. Silt removal devices should be well-maintained. For areas where no drainage is present or prior to drainage being constructed, sediment should be collected by excavating a pit into which surface runoff is directed and where settlement and/or infiltration can occur. A mobile sedimentation tank should also be provided to reduce the SS level of the wastewater.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

ü

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.4.19

4.9.3

It should be noted that Starfish Bay is a water and ecological sensitive receiver. Any construction activities close to it should be regarded as of particular concern. Silt traps should be installed and well-maintained to prevent any silty runoff from entering Starfish Bay. All wastewater generated during construction must be monitored and treated as necessary prior to discharging into the north and west shore of Whitehead.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

ü

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.4.20

4.9.4

Stockpiles should be covered during wet season to avoid generating silty runoff. A surrounding drainage system and the use of flat and exposed permeable area should be provided to facilitate control and infiltration of site runoff.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

ü

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.4.21

4.9.5

Site cleanliness and immediate cleanup/remedial action in case of chemical spill (such as fuel) are the most effective mitigation measures to minimize water quality impacts from general site run-off and should be adhered to in all construction sites. In addition, adequate sanitary facilities for workers on site should be provided and grease trap facilities should be installed for any canteen facilities.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

ü

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.4.22

4.9.6

Concrete washings will increase pH in receiving waterbodies. Close monitoring of pH should be conducted to avoid damage to the marine ecology. Buffer agents should be added where necessary to neutralise concrete wastewaters before its discharge to stormdrains or watercourses. A particular location within the site away from any water receiver should be selected for washing the concrete mixer. Infiltration/sedimentation pits should be used to settle out washings before discharge/treatment. Bored-pile suspension should also be settled in infiltration/sedimentation pits.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

ü

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.4.23

4.9.7

Oil interceptors should be installed for maintenance workshop and storage areas. These should be emptied regularly and should have a by-pass to prevent flushing during periods of heavy rain.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

ü

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.4.24

4.9.8

A section of road between the wheel washing bay and the public road should be paved, with backfall, to prevent wash water or other site runoff from entering public road drains. Sand and grit from wheel washing bays should be settled out and removed before the water is discharged into storm drains. The wheel washing bay should be designed to reuse settled wheel washing water.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

ü

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.4.25

4.9.9

For general construction works, mitigation measures and site practice for construction site drainage as stated in ProPECC PN 1/94 should be followed.

Whole construction site / Whole construction phase / Before start of construction works

Construction Contractor

 

3

 

WPCO / TM on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

                 

6.8

N/A

ECOLOGY (Construction Phase)

           

6.8.2

 

Impacts to woodland and plantation on site has been partially avoided by preserving a total of 7.05 ha of plantation in 5 patches of "preserved plantation" and 1.98 ha of woodland in 4 patches of "preserved woodland". These include the 2 headlands where natural understorey of plantation is gradually established and the secondary woodland along the west coast and at the knoll.

The preserved plantation and preserved woodland as shown in the preliminary Preferred Development Option / During detailed design, construction and operation

PlanD / LandsD / Construction Contractor / TDD / Developer /

ü

ü

ü

PELB Technical Circular 1/97, WBTC 4/97 / TMEIA

6.8.3

 

Loss of woodland and plantation lying on the fringe of the preserved woodland area where no earthwork is required should also be minimised as possible.

Woodland and plantation lying on the fringe of the preserved woodland area / Whole construction phase / Before construction phase

TDD / Developer / Detailed Design Engineer / Construction Contractor

ü

ü

 

PELB Technical Circular 1/97, WBTC 4/97 / TMEIA

6.8.4

 

Mature native trees which are commercially unavailable or difficult to establish should be transplanted, where feasible. A tree survey should be performed at the detailed design stage to assess in details the overall suitability of a tree (based on conservation status, size, health, form, landscaping value, etc.) for transplantation.

The proposed development / During detailed design and construction phase / During detailed design and construction phase

TDD / Developer / Detailed Design Engineer / Construction Contractor

ü

ü

 

PELB Technical Circular 1/97, WBTC 4/97 / TMEIA

6.8.5

 

Loss of woodland/plantation can be mitigated by extending the existing secondary woodlands. A total size of 1.87 ha comprising several areas at the east and west of the proposed development will be available for this purpose ("Extension Area of Secondary Woodland" in Figure 6.5). Native tree and shrub species should be planted in order to ensure like-to-like mitigation for the function of the woodland.

The proposed development / During detailed design and construction phase / During detailed design and construction phase

Developer / Detailed Design Engineer / Construction Contractor

ü

ü

 

PELB Technical Circular 1/97, WBTC 4/97 / TMEIA

6.8.6

 

The two compensatory planting areas of 1.07 ha in total on government land at the southeast end of the Study Area and the proposed Botanical Garden of about 4.12 ha in size at the northern end of the development area would potentially provide space for transplanted trees. They can also provide opportunities for compensatory planting for the loss of woodland/plantation, though plantation is not a natural habitat type. Other landscape planting in Whitehead Site 1 and roadside planting within the study area could also compensate part of the plantation loss.

The proposed development / During detailed design, construction and operation phase / During detailed design and construction phase

TDD / Detailed Design Engineer / Construction Contractor / AFCD to carry out maintenance of compensatory planting at the 1.07 ha land for ecological mitigation purpose / LCSD to maintain the Botanical Garden and public roadside planting

ü

ü

ü

PELB Technical Circular 1/97, WBTC 4/97 / TMEIA

                 

6.8.7

 

Site runoff should be desilted and re-used on-site where possible. Runoff should not be discharged into the embayed sandflat area. These measures will reduce the potential for suspended sediments, organics and other contaminants to enter the local marine environment.

Whole construction site / Duration construction phase / Before start of construction works

Construction Contractor

 

ü

 

TMEIA / WPCO

6.8.8

 

Coffer dam silt curtain should be deployed during subtidal construction works if necessary. Given the scale of works involved, this mitigation measure should be able to prevent sedimentation during constructions.

Where construction works are undertaken close to the coast / Duration construction phase / Before start of construction works

Construction Contractor

 

ü

 

TMEIA / WPCO

7.8

N/A

CULTURAL HERITAGE (Construction Phase)

           
   

Archaeological Resources

           

7.8.9, 7.10.1 & Table 7.8.3

 
  • In accordance with the Guidance Notes: Assessment of impact on sites of Cultural Heritage in Environmental Impact Assessment Studies (notes 19 – 21), the historical archaeological site of Wu Kai Sha, once clearly defined through field testing, and the prehistoric site south of To Tau Tsuen should be avoided fully or integrated intact into the project design as open spaces;
  • Temporary shoring should be provided when necessary to keep the prehistoric site undisturbed during the construction of the proposed Road D1(N) or any works associated with this project. Fencing should be provided along the section of Road D1(N) abutting the sand bar of the prehistoric archaeological site
    •

Whole construction site / Whole construction phase

PlanD / LandsD / Detailed Design Engineer / TDD / Developer / Construction Contractor

ü

ü

 

Guidance Notes: Assessment of impact on sites of Cultural Heritage in Environmental Impact Assessment Studies (notes 19 – 21) / TMEIA

   
  • If concrete at To Tau Tsuen is to be broken or any structures razed it is recommended that the opportunity be taken to test any exposed areas of the sand bar below; the AMO should be notified of any such scheduled works, license should be obtained from AMO before undertaking any fieldwork;
           
   
  • The central area presently covered in fill will require archaeological field evaluation at a later date and before the commencement of any building works or earthworks when access is available. It should be noted that the inability to carry out evaluation during this stage means that the normal EIA requirements have not been fulfilled. Postponement of evaluation to a later stage carries with it the risk that a major archaeological site may be confirmed which would have serious implications for future development of the site. Requirements in Annexes 10 and 19 of EIA TM should be strictly followed which includes the requirements for the mitigation measures for cultural relics identified by the survey;
           
   
  • Any archeological survey in To Tau Tsuen and in the area currently under restricted access which will be undertaken before implementation of the development, should be laid down as a condition in the OZP or Environmental Permit whichever is appropriate to alert the future developer or project proponent to include such survey in the development or project process. Requirements in Annexes 10 and 19 of EIA TM should be strictly followed which includes the requirements for the mitigation measures for cultural relics identified by the survey;
           
   
  • Methodology (based on Annexes 10 and 19 of EIA TM) and programme should be agreed in advance with the AMO for the above-mentioned additional field investigations. The AMO should also be notified at least two weeks before the commencement of the investigation for their necessary site monitoring on the survey;
           
   
  • The archaeologist responsible for any archaeological investigation should obtain a license from the Authority under the provision of the Antiquities and Monuments Ordinance (Cap. 53) before undertaking any fieldwork.
           
   
  • For the reasons of Unit 2 was untested under the archaeological field evaluation at this stage and cultural relics dated to Late Neolithic period, Song and Qing dynasties were discovered at Units 6 and 7 of Figure 7.9 and a piece of land as shown by Figure 7.46 presently covered by fill, it is recommended that further archaeological field evaluation will be required within the project limit of the proposed new roads of D1(E), D1(W) and D1(N) as shown by Figure 7.46, the further archaeological field evaluation shall be conducted before the commencement of the roads project. The purpose of the further archaeological field evaluation is to ensure that no cultural relic will be affected by the roads project during the construction stage. Requirements in Annexes 10 and 19 of EIA TM should be strictly followed which includes the requirements for mitigation measures for cultural relics identified by the survey.
           
   
  • Methodology (based on Annexes 10 and 19 of EIA TM) and programme should be agreed in advance with the AMO for the above mentioned additional field investigation. The AMO should also be notified at least two weeks before the commencement of the investigation for their necessary site monitoring on the survey; the archaeologist responsible for any archaeological investigation should obtain a license from the Authority under the provision of the Antiquities and Monuments Ordinance (Cap.53) before undertaking any fieldworks.
           
   

Built Heritage

           

7.10.2, Tables 7.9.3 & 7.9.4

 
  • The tree shrine (WH-99-25) in To Tau Tsuen should be preserved in situ.
  • Information on the history of To Tau Tsuen, gathered from desk based research and local informants should be presented as a cultural heritage tourism feature in an easily accessible form, such as poster boards along the waterfront footpath route and in the planned heritage centre.

Whole construction site / Whole construction phase

PlanD / TDD / Detailed Design Engineer / Construction Contractor

ü

ü

 

Guidance Notes: Assessment of impact on sites of Cultural Heritage in Environmental Impact Assessment Studies (notes 19 – 21) / TMEIA

   
  • The impacts from construction associated with the improvement of the existing road to the east of the fung shui hill should be kept to a minimum, for example, cutting of the slope should be avoided.
           
   
  • The land bordering the proposed cycle path along the western side of the fung shui hill should remain wooded.
           
   
  • The alignment of proposed Road D1(W) should be designed to allow preservation in-situ of permanent grave feature a.
           
   
  • Preservation in-situ with complementary landscaping should be provided to the Wu Kai Sha Village well.
           
   
  • Mitigation measures in the form of erection of protective fencing around the surface features of the Wu Kai Sha Village well during the construction phase should be implemented.
           
   
  • Mitigation measures in the form of erection of protective fencing around the surface features of the permanent grave features a and c during the construction phase should be implemented.
           

8.6

5.2

LANDSCAPE AND VISUAL QUALITY

(Construction Phase)

           

8.6.29 - 8.6.30, Table 8.6.3 & Figure 8.21

Table 5.1

  • Retention and protection of existing Starfish Bay and Wu Kai Sha Beaches. Physical measures implemented to prevent access. Regular checks should be carried out to ensure that the work site boundaries are not exceeded, hoarding is properly maintained and that no damage is being caused to the these areas.
  • Retention and protection of existing Natural Coastal topography and rock formations. Physical measures implemented to prevent access. Regular checks to be carried out to ensure that the work site boundaries are not exceeded, hoarding is properly maintained and that no damage is being caused to the these areas.

Whole construction stage / Whole construction periods

Detailed Design Engineer / TDD / Developer / Construction Contractor

ü

ü

 

TMEIA

   
  • Retention and protection of existing Pine Woodland (7.05ha). Physical measures implemented to prevent access. Regular checks to be carried out to ensure that the work site boundaries are not exceeded, hoarding is properly maintained and that no damage is being caused to the these areas.
           
   
  • Minimisation the extent cutting into the areas of secondary woodland. 1.98ha of them is to be preserved. Extent of clearance to be agreed and marked on site. Regular checks to be carried out to ensure that the work site boundaries are not exceeded, hoarding is properly maintained and that no damage is being caused.
           
   
  • Decorative hoarding along southern boundary of the site, beaches at Starfish Bay and Wu Kai Sha and around To Tau and Wu Kai Sha Village areas.
           
   
  • Transplanting of trees that need to be removed and that stand a high chance of successfully re-establishing where feasible.
           
   
  • Topsoil stripped and stored for re-use in the construction of the soft landscape works.
           
   
  • The potential for soil erosion should be reduced by minimising the extent of vegetation disturbance on site and by providing a protective cover (e.g. plastic sheeting or a grass cover established by hydroseeding) over any exposed ground.
           
   
  • Control of night-time lighting.
           
   
  • Grass hydroseeding of slopes and development platforms as soon as they are completed.
           
   

OPERATIONAL PHASE MITIGATION MEASURES

           

3.6

 

NOISE (Operational Phase)

           
   

Traffic Noise

           
   

Environmentally Friendly Layout Design

           

3.6.3-3.6.7 & Table 3.6.6

3.9.13, Appendix A

Layout design based on the preliminary Preferred Development Option (the use of non-sensitive structures such as podium and commercial centre to shield traffic noise, setback from noisy roads, and orientation of residential blocks & schools)

The proposed development site / During the operational period / Provided before occupancy of proposed development

PlanD / LandsD / Developer / ArchSD

ü

 

ü

TMEIA

   

Quiet Transportation Mode

           

3.6.8-3.6.9

3.9.13

Appendix A

Provision of Sunken Road L1 and public walkway at central spine

Sunken road to be located at the junction of Local Roads L1 & L2; public walkway located at the central spine / During the operational period / Provided before occupancy of proposed development

PlanD / LandsD / Developer / TDD / HyD

ü

 

ü

TMEIA

   

Wu Kai Sha Station Development

           

Table 3.6.6 & 3.6.31

3.9.13 Appendix A

  • Mitigation measures such as installation of window insulation and air-conditioning or special building design (such as bay window to limit the angle of view or environmentally equivalent design) should be provided for the non-compliant units.

Applicable to the units exceeding the traffic noise criteria / During the operation period / Provided before occupancy of proposed development

PlanD / LandsD / Developer

ü

 

ü

TMEIA

   
  • Proposed residential blocks to be built on top of podium (20m)

Wu Kai Sha Station Development

Developer

ü

 

ü

TMEIA

   

Lok Wo Sha Development

           

Table 3.6.6 & 3.6.20

3.9.13 Appendix A

  • The use of blank façade (or environmentally equivalent design) for NSR 18 facing Sai Sha Road and its roundabout.

Applicable to NSR 18 / During the operation period / Provided before occupancy of proposed development

PlanD / LandsD / Developer

ü

 

ü

TMEIA

 
  • Use of 3 storeys (20m) commercial centre to shield traffic noise from Sai Sha Road

South of Lok Wo Sha Development, next to Sai Sha Road

LandsD / PlanD and Developer

ü

 

ü

TMEIA

   
  • Proposed residential blocks to be built on top of 2 storeys (10m) carpark podium

The proposed Lok Wo Sha site

LandsD / PlanD and Developer

       
   
  • In-situ preservation of 3 patches of woodland to the west and east of the development (also as part of ecological mitigation)

Western and eastern part of proposed Lok Wo Sha site

LandsD / PlanD and Developer

       
   
  • Minimum setback distance of 15m from Road D1(W) (not applicable to the preserved woodlands)

Western part of proposed Lok Wo Sha site

LandsD / PlanD and Developer

       
   
  • Minimum setback distance of 15m from Road D1(N)

Northern part of proposed Lok Wo Sha site

LandsD / PlanD and Developer

       
   
  • Minimum setback distance of 20m at the northeast and 22m at the southeast from Road D1(E) (not applicable to the preserved woodlands)

Eastern part of proposed Lok Wo Sha site

LandsD / PlanD and Developer

       
   
  • Minimum setback distance of 20m at the southwest and 15m at the southeast from Sai Sha Road

Northern part of proposed Lok Wo Sha site

LandsD / PlanD and Developer

ü

 

ü

TMEIA

 
   

Whitehead Site 2

           

Table 3.6.6

3.9.13 Appendix A

  • Proposed residential blocks to be built on top of 1 storey (5m) carpark podium

Whole Proposed Whitehead Site 2

         
 
  • Minimum setback distance of 15m from Road D1(N)

Southern part of the proposed Whitehead Site 2

LandsD / PlanD and Developer

ü

 

ü

TMEIA

   
  • Minimum setback distance of 5m from Road L1

Western and Northern part of the proposed Whitehead Site 2

LandsD / PlanD and Developer

ü

 

ü

TMEIA

   

Whitehead Site 3

           

Table 3.6.6

3.9.13 Appendix A

  • Proposed residential blocks to be built on top of 1 storey (5m) carpark podium

Whole Proposed Whitehead Site 3

LandsD / PlanD and Developer

ü

 

ü

TMEIA

 
  • Minimum setback distance of 5m from Road L2

Eastern and Northern part of the proposed Whitehead Site 2

LandsD / PlanD and Developer

ü

 

ü

TMEIA

   

Proposed Secondary School at Whitehead Site 3

           

3.6.22 & Table 3.6.6

3.9.13 Appendix A

  • The use of approximately 90m long 3m tall boundary wall to shield traffic noise.

3m tall boundary wall located at the southern part of the proposed secondary school (approximately 90m long) / During the operation period / Provided before occupancy of proposed development

ArchSD

ü

 

ü

TMEIA

   
  • The school to be located at an orientation with the classroom block facing away from Road D1(N) i.e. facing north.

The Proposed Secondary School / During the operation period / Provided before occupancy of proposed development

ArchSD

ü

 

ü

TMEIA

   

Proposed Primary School at Whitehead Site 3

           

Table 3.6.6

3.9.13 Appendix A

  • The school to be located at an orientation with the classroom block facing away from Road D1(N) i.e. facing north.

The Proposed Secondary School / During the operation period / Provided before occupancy of proposed development

ArchSD

ü

 

ü

TMEIA

   

Train Noise (MOS Rail)

           

3.7.16

N/A

Lok Wo Sha Development to be protected by adequate setback based on the layout of the Preferred Development Option.

The proposed development site / During the operational period / Provided before occupancy of proposed development

PlanD / LandsD / Developer

ü

 

ü

NCO

3.7.17-3.7.18 & Table 3.7.6

N/A

Wu Kai Sha Development to be protected by approximately 60m long semi-enclosure or central plenum along the twin viaduct section. According to MOS Rail EIA, "the Multi-plenum System provides the flexibility for future enhancement as edge wall barrier heights can be incrementally extended for increased noise attenuation from 1.2m up to full enclosure". Mitigation measures will be subject to further review in the detail design stage of the Wu Kai Sha station development.

Approximately 60m long semi-enclosure or central plenum along the twin viaduct section of MOS Rail / During the operational period / Provided before occupancy of proposed development

PlanD / LandsD / Developer / KCRC

ü

 

ü

NCO

   

Fixed Noise

           
   

Existing Sewage Pumping Station at Lee On Estate (Ma On Sha Area 108)

           

3.8.11

N/A

The future upgrading works for the pumping station should have a maximum allowable sound power level emitting from the exhaust of not exceeding 92 dB(A), i.e. meet the TMEIA night-time criteria of 50 dB(A) for NSR 10 at a distance of 70m from the pumping station.

Existing Sewage Pumping Station at Lee On Estate (Ma On Sha Area 108) / During the operational period / Future upgrading works

DSD

ü

 

ü

NCO

   

MOS Rail – Wu Kai Sha Station Ventilation Exhaust and Plant Room

           

3.8.18 & Table 3.8.4

N/A

The ventilation exhaust and plant room of the MOS Rail – Wu Kai Sha Station should adhered to the maximum allowable sound power level as shown in Table 3.8.4. Locating noise source away from the NSRs and by orientating noise source away from the NSRs. Alternatively, the future detailed design of any fixed noise sources of Wu Kai Sha Station undertaking by KCRC will need to satisfy the TMEIA or findings of this EIA report.

MOS Rail – Wu Kai Sha Station Ventilation Exhaust and Plant Room/ During the operational period / Provided before occupancy of proposed development

KCRC

ü

 

ü

NCO

 
   

Proposed Utility Services & G/IC

           

3.8.31 & Table 3.8.7

N/A

The exhaust of the ventilation system and any opening of the salt water pumping station at Whitehead should be located facing away from any NSRs, i.e. facing west. Louver or other acoustic reduction system should also be applied to the exhaust exit of the building. The maximum allowable sound pressure level (design noise limit) should not exceed 78 dB(A) as shown in Table 3.8.7.

The salt water pumping station at Whitehead / During the operational period / Provided before occupancy of proposed development

WSD

ü

 

ü

NCO

3.8.33 & Table 3.8.7

N/A

Noise from the ventilation system of the proposed Indoor Recreational Centre should be reduced by locating it as far from the NSRs as possible and by orientating the noise source away from the NSRs. It is recommended that the ventilation/cooling system at the indoor recreation centre should be located at the southern part of the indoor recreation centre with opening facing towards south. Incorporation of silencer and acoustic louver to the ventilation system. The maximum allowable sound pressure level (design noise limit) should not exceed 107 dB(A) as shown in Table 3.8.7.

The proposed Indoor Recreational Centre / During the operational period / Provided before occupancy of proposed development

LCSD / ArchSD

ü

 

ü

NCO

3.8.33 & Table 3.8.7

N/A

For the proposed commercial centre at Lok Wo Sha, the ventilation system should be located at the southern part of the commercial centre with opening facing towards either east or west. Incorporation of silencer and acoustic louver to the ventilation system. The maximum allowable sound pressure level (design noise limit) should not exceed 81 dB(A) as shown in Table 3.8.7.

The proposed commercial centre at Lok Wo Sha / During the operational period / Provided before occupancy of proposed development

PlanD / LandsD / Developer

ü

 

ü

NCO

4.7

N/A

AIR QUALITY (Operational Phase)

           
   

Carpark

           

4.7.15-4.7.16

 

Installation of ventilation system within carpark

Underground public carpark at Whitehead Site 1 (Recreational site) and all carpark with parking spaces of more than 500 / During operation of the carpark / Before the operation of carpark

PlanD / LandsD / Developer

ü

 

ü

ProPECC PN 2/96

5.5

N/A

WATER QUALITY (Operational Phase)

           
   

Sewage

           

5.5.20

 

Sewage generated from the development should be discharged through sewerage network in Ma On Shan and transported to Shatin Sewage Treatment Works. No sewage should be discharged to Tolo Harbour.

The proposed development / During operation stage of the development / Sewerage system in place before operation

TDD to provide sewerage network for the proposed development / DSD to provide maintenance during operation

ü

 

ü

WPCO / Technical Memorandum on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

   

Stormwater Runoff

           

5.5.21

 

All stormwater runoff generated north of the Study Area should be collected and discharged at the outfalls at the northern and western coast of Whitehead. No stormwater runoff due to the development to the north of Sai Sha Road should be discharged to Starfish Bay.

The proposed development / During operation stage of the development / Drainage system in place before operation

TDD to provide drainage network for the proposed development / DSD to provide maintenance during operation

ü

 

ü

WPCO / Technical Memorandum on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.5.22

 

The box culvert being constructed under the Road T7 project will receive stormwater runoff from the areas south of Sai Sha Road and upstream in Ma On Shan Country Park. It will discharge to Starfish Bay. Stormwater runoff collected from the proposed Wu Kai Sha Station residential development above the PTI will also be discharged via the box culvert to Starfish Bay. Sotrmwater runoff from the covered part of the PTI will be discharged to public sewerage.

The proposed development / During operation stage of the development / Drainage system in place before operation

Developer to provide drainage connection to the box culvert / DSD to provide maintenance to Government drains during operation

ü

 

ü

WPCO / Technical Memorandum on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.5.23

 

Standard pollution control measures such as catchpits and oil & grease traps should be incorporated into the drainage system of Wu Kai Sha development

Drainage system of Wu Kai Sha Station residential development / During operation stage of the residential development / Mitigation in place before operation

LandsD and/or PlanD to incorporate requirements into the land lease; Developer of Wu Kai Sha Station residential development to implement and to provide maintenance during operation

ü

 

ü

WPCO / Technical Memorandum on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.5.24

 

Impacts from stormwater runoff should be mitigated through preventative and control measures. Prevention measures include sweeping of roads, minimising the use of excessive volumes of chemicals such as bleaching and cleaning materials in buildings, controlling the use of fertilisers in parks and maintaining a clean environment through raising public awareness.

The proposed development / During operation stage

Developer for the proposed residential development / HyD & FEHD for public roads, footpaths & cycletracks / LSCD for recreational areas

   

ü

WPCO

5.5.25

 

It is proposed that in the Lok Wo Sha and Whitehead areas, infiltration chambers should be installed as part of the stormwater management system.

Drainage system in Lok Wo Sha and Whitehead areas / During operation stage / Mitigation in place before operation

TDD / Developer to provide chambers for the development / DSD / Developer to provide maintenance during operation

ü

 

ü

WPCO / Technical Memorandum on Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters

5.5.26

 

The chamber should be inspected and tested every 6-12 months. Any rubbish or debris that has accumulated in the chamber should be removed on a periodic basis.

Proposed infiltration chamber within the proposed development / During operation stage of the development

DSD / Developer

   

ü

TMEIA

5.5.27

 

The locations suitable for installation of infiltration chambers will depend on the depth of permeable layer underneath and should be determined in the detailed design stage.

Proposed infiltration chamber within the proposed development

TDD / Developer / Detailed Design Engineer

ü

   

TMEIA

7.8

N/A

CULTURAL HERITAGE

(Operational Phase)

           
   

Archeological Resources

           

7.8.9, 7.10.1 & Table 7.8.3

 

Fencing should be provided along the section of Road D1(N) abutting the sand bar of the prehistoric archaeological site to prevent disturbances during the operational stage phase.

The section of Road D1(N) abutting the sand bar of the prehistoric archaeological site / Operation stage / Operation stage

Detailed Design Engineer / TDD / Construction Contractor / HyD to provide maintenance

ü

ü

ü

Guidance Notes: Assessment of impact on sites of Cultural Heritage in Environmental Impact Assessment Studies (notes 19 – 21) / TMEIA

   

Built Heritage

           

7.8.9, 7.10.2 & Table 7.8.3

 

Complementary landscaping should be implemented in the vicinity of the Wu Kai Sha Village Well.

Vicinity of the Wu Kai Sha Village Well / Operation stage / Operation stage

Detailed Design Engineer / TDD / Construction Contractor / LCSD to provide maintenance

ü

ü

ü

Guidance Notes: Assessment of impact on sites of Cultural Heritage in Environmental Impact Assessment Studies (notes 19 – 21) / TMEIA

8.7

5.2

LANDSCAPE AND VISUAL QUALITY

(Operational Phase)

           

8.7.21 – 8.7.22, Table 8.7.3 & Figure 8.22

Table 5.2

  • Building Height and development profile designed to compliment the existing topography and urban forms, in key views. Taller larger scale buildings to be set to the southern side of the site close to Ma On Shan hills and alongside existing high rise residential estates. The northern site should be retained for low rise development.
  • Layout of the proposed development to avoid disturbance of existing Pine Coastal Woodland. 7.05ha of plantation preserved.

Whole Site / Whole operational phase

TDD / Developer / LCSD / HyD/ Detailed Design Engineer

ü

 

ü

TMEIA

   
  • Layout of the proposed development to minimise disturbance of existing Secondary Woodland. 1.98ha of secondary woodland preserved.
           
   
  • Layout of the proposed development to avoid disturbance of existing knolls and grave sites within the site.
           
   
  • Layout of the proposed development to avoid disturbance of existing beaches and natural coastline.
           
   
  • The external appearance of building blocks should be carefully detailed in terms of form, colour and finishes such that they are visually integrated as much as possible into the surrounding landscape. The form and surface detailing of these structures should be carefully considered to reduce their apparent mass, and potential glare.
           
   
  • The new road structures, elevated viaducts, abutments, retaining walls, noise barriers should receive sensitive architectural and chromatic treatment.
           
   
  • Planting wide canopied shade trees along roadsides along the main road to provide shade and greenery. High quality hard landscape treatment of footpaths areas.
           
   
  • Planting of wide canopied shade trees, and high quality hard landscape treatment of pedestrian corridors to provide shade for pedestrians and an attractive green appearance from surrounding view points.
           
   
  • Hard and soft landscape treatment of open areas within residential development lots areas to the provide shade and shelter and a green appearance from surrounding view points.
           
   
  • Landscape treatment of recreational land uses with extensive tree planting throughout the areas to the provide shade and shelter and a green appearance from surrounding view points and screen ground level activity in views from the Harbour. Links should be made to surrounding recreational sites, including the proposed Ma On Shan Waterfront Promenade. The areas include 3.5ha in Botanical Garden and 2.23ha in other areas of Whitehead Site 1 to also compensate for woodland/plantation vegetation loss during construction.
           
   
  • Landscape treatment of car and coach parking areas with planting of wide canopied trees throughout the site to provide shade and shelter, and ornamental flowering trees and shrubs to a green appearance from surrounding areas.
           
   
  • Woodland tree and shrub planting should be undertaken to screen existing village settlement areas of To Tau and Wu Kai Sha.
           
   
  • Roadside woodland tree/shrub planting as a buffer / screen along Sai Sha Road or other proposed public / private roads within the proposed development whenever possible.
           
   
  • Secondary woodland planting (1.07ha) at the Government land near the proposed IRC to compensate for woodland/plantation vegetation lost during construction.
           
   
  • Secondary woodland planting proposed at the woodland extension (1.87ha) within the Lok Wo Sha Development and landscape planting in Whitehead Site 1 to compensate for woodland / plantation vegetation lost during construction.
           
   
  • Woodland tree and shrub planting to screen ecological habitat and recreational areas at the existing beaches of Starfish Bay and Wu Kai Sha from the development.
           

Notes:

AFCD : Agriculture, Fisheries and Conservation Department

ArchSD : Architectural Services Department

DSD : Drainage Services Department

FEHD : Food and Environmental Hygiene Department

LandsD : Lands Department

LCSD : Leisure and Cultural Services Department

PlanD : Planning Department

TDD : Territory Development Department

WSD : Water Supplies Department

Des : Detailed Design Stage

C : Construction Stage

O : Operational Stage

APCO : Air Pollution Control Ordinance

NCO : Noise Control Ordinance

WPCO : Water Pollution Control Ordinance

TM : Technical Memorandum

TMEIA : Technical Memorandum on Environmental Impact Assessment Process

WBTC : Works Branch Technical Circular

N/A : Not Applicable

NSR C1 : Construction Noise Sensitive Receivers at To Tau

NSR C2 : Construction Noise Sensitive Receivers at Wu Kai Sha

NSR C3 : Construction Noise Sensitive Receivers at Li Po Chun United World College

NSR C4 : Construction Noise Sensitive Receivers at Symphony Bay

NSR C5 : Construction Noise Sensitive Receivers at Cheung Muk Tau

NSR C6 : Construction Noise Sensitive Receivers at Monte Vista

NSR C7 : Construction Noise Sensitive Receivers at future Wu Kai Sha Station Development


Back to Environment Monitoring and Audit Mnual TOC