10                                            Conclusions & Environmental Outcomes

10.1                                      Introduction

This Section presents a summary of the key potential environmental outcomes associated with the construction and operation of the Project.  Implementation schedule of the recommendations are shown in Table 10.1. 

10.2                                      Air Quality

Given the small scale of the construction works and separation distance from the Air Sensitive Receivers (ASRs), the dust impact at ASRs is minimal.  In addition, due to the small scale of site area, the number of construction plant operating on site is limited, therefore, the gaseous emissions from the construction equipment is minimal and no adverse impact is anticipated.

In view of the limited emissions from karts on tracks and separation distances between ASR and tracks, air quality impact is not expected.  Since the number of shuttle bus running between the karting track and Tuen Mun Centre, the air quality impacts due to additional traffic arising from karting track would not be anticipated.  Besides, with the proper handling of petrol stores and re-fuelling and regular maintenance of karts, no odour nuisance is expected.

Based on the impact assessment, no EM&A measures are required.

10.3                                      Noise

Due to the large separation distances, unmitigated construction activities associated with the Project will not cause adverse noise impact at the NSRs.  The predicted construction noise levels are in the range of 35 – 37 dB(A), which complied with the stipulated noise criterion.   

Based on the worst case scenario by adopting a maximum sound pressure level of 98 dB(A) at 1 m for 13-kart movement, the predicted facade noise levels for a maximum of 40-kart event is well below the daytime noise criterion of 55 dB(A) at all NSRs located at more than 1km from the site boundary. 

Based on the impact assessment, no EM&A measures are required.

10.4                                      Water Quality

Given the small scale of the construction works, short duration of construction period and no identified WSRs within the study area, water quality impacts are negligible and minimal during construction phase of the Project.    

For the operation of karting, the main concern is the water quality impact may be caused by the servicing and petrol re-fuelling activities.  Nevertheless, the surface runoff can be well controlled by adoption of a proper drainage system with peripheral channel and petrol interceptor.  Addition to the proper handling of petrol tank and re-fuelling and regular maintenance of karts, no adverse water quality impacts are anticipated. 

Based on the impact assessment, no EM&A measures are required.

10.5                                      Waste Assessment

The anticipated quantities of C&D materials to be generated from site clearance and building renovation, and chemical wastes, sewage and general refuse to be generated during both the construction and operational phases will be minimal.  Minimal residual impacts are anticipated from the construction and operation of the karting track.

10.6                                      Land Contamination

Given the small scale of the construction works, short duration of construction period and minimal use of heavy-duty construction machinery, fuel and oils, land contamination impacts are negligible during construction phase of the Project.    

For the operation of the Project, the main concern is the potential land contaminations caused by the karting activities, servicing, repairing and oil filling activities.  Nevertheless, all the above activities will be carried out on paved areas.  Any leakage can be well controlled by secondary containments or a proper drainage system with peripheral channel and petrol interceptor.  With consideration of the infrequent refuelling activities and the minimal amount of fuel handled each time, as well as proper handling of petrol tank, precaution on refuelling activities and regular maintenance of karts, no adverse impacts on land contamination are anticipated. 

Based on the impact assessment, no EM&A measures are required.

10.7                                      Landscape and Visual

Given that the proposed karting track is selected to be located within a remote and shielded area, the proposed karting track would be only visible from limited viewpoints, including the transient road users along Lung Kwu Tan Road and the users of the Lung Kwu Tan firing range.  Project works would result in small losses of landscape character/resource areas confining to 1.8ha of disturbed area.  Based on the assessment, the landscape and visual impact of the proposed karting track are considered to be acceptable. 

10.8                                      Environmental Outcome

No unacceptable residual impacts are predicted for the construction and operation of the Project.  This section presents the environmental outcome of the Project.

10.8.1                                Population and Environmentally Sensitive Area Protected

The site at Lung Kwu Tan has been selected as the preferred location for the development of an outdoor karting track.  The site is distant (>1000m) from any existing and planned residential developments and hence the potential air quality and noise impacts are anticipated to be small.  As the site is currently a flatted wasteland, no further tree felling or slope excavation is required and thus minimise the impact on ecological resources.

10.8.2                                Environmentally Friendly Designs Recommended

The servicing area, and repair/maintenance area would be properly paved by concrete to avoid any potential land contamination impacts.  In addition, the village house and Tsz Tong within the site boundary will be kept and managed by the Project Proponent.

10.8.3                                Key Environmental Problems Avoided

As discussed in Section 10.8.1, the proposed karting track has avoided densely populated residential developments.  In addition, the footprint of the karting track is designed such that no slope cutting or tree felling are required as part of the construction works.  The karting track location makes use of the existing vegetation and the natural topography, so the Project would only be visible from limited viewpoints.

10.9                                      Overall Conclusions

The EIA has critically assessed the overall acceptability of any environmental impacts likely to arise as a result of the construction and operation of the proposed karting track. 

This EIA Study has predicted that the Project will comply with all environmental standards and legislation and thus demonstrated the acceptability of any residual impacts from the Project and the protection of the population and environmentally sensitive receivers.  The Study concluded that there would be no adverse long term or cumulative effects/impacts on the environment.


Table 10.1      Implementation Schedule

EIA Ref.

Environmental Protection Measures

Location/Duration of Measures/Timing of Completion of Measures

Implementation Agent

Implementation Stage

Relevant Legislation & Guidelines

Des

C

O

Dec

AIR QUALITY – CONSTRUCTION PHASE

The following good site practices are recommended to minimize the dust nuisance during the construction of the karting track:

S.4.5.1

·     Stockpiling of dusty materials should be entirely covered or watered to avoid fugitive dust;

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Air Pollution Control (Construction Dust) Regulation

S 4.5.1

·     Site area should be kept wet during excavation;

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Air Pollution Control (Construction Dust) Regulation

S 4.5.1

·     Dusty materials carried by truck leaving the construction site should be covered by tarpaulin sheet to ensure no leakage of dusty materials from trucks;

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Air Pollution Control (Construction Dust) Regulation

S 4.5.1

·     Regularly maintenance should be provided for the diesel-powered mechanical equipment especially black smoke is emitted; and

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Air Pollution Control (Construction Dust) Regulation

S 4.5.1

·     The engine of the equipment should be switched off when it is not in operation.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Air Pollution Control (Construction Dust) Regulation

AIR QUALITY – OPERATIONAL PHASE

Although no exceedance of air quality impact is anticipated during the operation of karting track, the following measures are recommended:

S4.5.2

·     Maintenance of karts should be performed regularly to avoid incomplete combustion or fuel leakage;

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

S 4.5.2

·     Proper handling of petrol storage tank and during refuelling to avoid leakage of petrol; and

At refilling area and petrol storage area/throughout the operational year

HGH Limited

 

 

ü

 

-

S 4.5.2

·     Only limited quantities of petrol, a standard 18 litre safety petrol tank, will be stored on site during the daytime.  Any unused petrol will be collected by the DG vehicle after the operating time of the karting track.  Only minor maintenance works will be conducted on-site, including the use of lubricants, chain oil, and brake cleaner.  If any engine maintenance works are required, the kart vehicle will be transport to a garage.

At refilling area and petrol storage area/throughout the operational year

HGH Limited

 

 

ü

 

-

NOISE – CONSTRUCTION PHASE

Though the predicted construction noise levels comply with the stipulated noise criterion, good site practice and noise management is recommended for minimising the construction noise impact on nearby NSRs.

S 5.6.1

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

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Noise from Construction Activities - Non-statutory Controls (Practice Note PN 2/93)

S 5.6.1

·     Machines and plant that may be use intermittently, such as vibratory poker, should be shut down between work periods or should be throttled down to a minimum;

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Noise from Construction Activities - Non-statutory Controls (Practice Note PN 2/93)

S 5.6.1

·     Plant known to emit noise strongly in one direction, should, where possible, be orientated to direct noise away from nearby NSRs; and

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Noise from Construction Activities - Non-statutory Controls (Practice Note PN 2/93)

S 5.6.1

·     Mobile plant should be sited as far away from NSRs as possible.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Noise from Construction Activities - Non-statutory Controls (Practice Note PN 2/93)

NOISE – OPERAITONAL PHASE

No mitigation measures are required as no exceedance of noise during operation is anticipated.


 


WATER QUALITY – CONSTRUCTION PHASE

The following mitigation measures should be implemented during the construction of the karting track:

Construction Runoff and Drainage

S 6.6.1

·     Provision of perimeter channels to intercept storm-runoff from outside the site.  These shall be constructed in advance of site formation works and earthworks;

·     Exposed soil surface shall be covered by tarpaulin as soon as possible to reduce the potential of soil erosion.

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

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

EPD Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94)

General Construction Activities

S 6.6.1

·     Debris and rubbish generated on-site shall be collected, handled and disposed of properly to avoid entering the nearby stormwater drains and open drainage channels.  All fuel tank 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.  Open storm water drains and culverts near the works area shall be covered to block the entrance of large debris and refuse.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

-

Sewage from Workforce

S 6.6.1

·     Temporary sanitary facilities, such as portable chemical toilets, shall be employed at the areas where the temporary connection is not feasible.  A licensed contractor would be responsible for appropriate disposal and maintenance of these facilities.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

-


 

WATER QUALITY – OPERATIONAL PHASE

Although no unacceptable water quality impact is anticipated during the operational phase, the following measures are recommended:

Surface Runoff

S 6.6.2

·     Maintenance of karts should be performed regularly to avoid leakage of fuel on tracks;

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

S 6.6.2

·     Proper handling of petrol storage tank to avoid leakage of petrol;

At refilling area and petrol storage area/throughout the operational year

HGH Limited

 

 

ü

 

-

S 6.6.2

·     Drainage serving the open petrol refilling point should be connected to storm drains via a petrol interceptor with peak storm bypass;

At refilling area and petrol storage area/throughout the operational year

HGH Limited

 

 

ü

 

-

S 6.6.2

·     The servicing areas should be located within roofed areas and concrete paved area.  The drainage in the concrete paved areas should be connected to foul sewers via a petrol interceptor.  Oil leakage or spillage should be contained and cleaned up immediately.  Waste oil should be collected and stored for recycling or disposal in accordance with the Waste Disposal Ordinance.

At refilling area and petrol storage area/throughout the operational year

HGH Limited

 

 

ü

 

Waste Disposal Ordinance

Sewage Treatment

S 6.6.2

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

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-


 

WASTE MANAGEMENT – CONSTRUCTION PHASE

Wherever practicable, inert materials should be segregated from other wastes to avoid contamination thereby ensuring acceptability at public filling areas and avoiding the need for disposal at landfill.

C&D Materials

S 7.5.1

Measures taken in the Planning Design Stages to Reduce the Generation of C&DM

·     Avoidance and minimization, that is, reduction of waste generation through changing or improving practices and design;

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Waste Disposal Ordinance

WBTC No. 25/99 Incorporation of Information on Construction and Demolition Material management in PWSC Papers

S 7.5.1

·     Reuse of materials, thus avoiding disposal (generally with only limited reprocessing);

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

WBTC No. 25/99 Incorporation of Information on Construction and Demolition Material management in PWSC Papers

S 7.5.1

·     Recovery and recycling, thus avoiding disposal (although reprocessing may be required); and

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

WBTC No. 25/99 Incorporation of Information on Construction and Demolition Material management in PWSC Papers

S 7.5.1

·     Treatment and disposal, according to relevant law, regulations, guidelines and good practice.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

WBTC No. 25/99 Incorporation of Information on Construction and Demolition Material management in PWSC Papers

S 7.5.1

Recommended Construction Phase Measures for the Reduction of C&DM Generation

·     The Contractor should recycle as much of the C&DM as possible on-site.  Public fill and construction waste should be segregated and stored in different containers or skips to facilitate reuse or recycling of materials and their proper disposal.  Surplus public fill should be delivered to the adjacent Tuen Mun Area 38 Fill Bank or Tuen Mun Area 38 Temporary Construction Waste Sorting Facility for proper reuse while the construction waste should be delivered to the WENT Landfill.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Waste Disposal Ordinance

WBTC 32/92, The Use of Tropical Hard Wood on Construction Site

WBTC No. 2/93, Public Dumps

WBTC 33/2002 Management of C&D Material including Rock

 

WBTC 15/2003 Waste Management on Construction Sites

 

Chemical Waste

The Contractor for the construction works and the operator of the karting track should be registered with the EPD.  Chemical waste should be handled in accordance with the Code of Practice on the Packaging, Handling and Storage of Chemical Wastes as follows.  Containers used for storage of chemical wastes should:

S 7.5.2

·     be suitable for the substance they are holding, resistant to corrosion, maintained in a good condition, and securely closed;

·     have a capacity of less than 450 L unless the specifications have been approved by the EPD; and

·     display a label in English and Chinese in accordance with instructions prescribed in Schedule 2 of the Regulations.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Waste Disposal (Chemical Waste) (General) Regulation

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

S 7.5.2

The storage area for chemical wastes should:

·     be clearly labelled and used solely for the storage of chemical waste;

·     be enclosed on at least 3 sides;

·     have an impermeable floor and bunding, of capacity to accommodate 110% of the volume of the largest container or 20% by volume of the chemical waste stored in that area, whichever is the greatest;

·     have adequate ventilation;

·     be covered to prevent rainfall entering (water collected within the bund must be tested and disposed of as chemical waste, if necessary); and

·     be arranged so that incompatible materials are appropriately separated.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Waste Disposal (Chemical Waste) (General) Regulation

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

S 7.5.2

Disposal of chemical waste should be:

·     via a licensed waste collector; and

·     to a facility licensed to receive chemical waste, such as the Chemical Waste Treatment Facility which also offers a chemical waste collection service and can supply the necessary storage containers.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Waste Disposal (Chemical Waste) (General) Regulation

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

Sewage

S 7.5.3

·     An adequate number of portable toilets should be provided for the on-site construction workforce.  4 mobile toilets would be provided for the use of visitors during operational phase.  All portable toilets should be maintained in a state that will not deter the users from using them.  Night soil should be regularly collected by a licensed collector for disposal at the Pillar Point Sewage Treatment Works.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

-

General Refuse

S 7.5.4

·     General refuse should be stored in enclosed bins separately from construction and chemical wastes.  Recyclables (ie paper and aluminium can and plastic bottles) should be stored separately to facilitate subsequent recycling.  A reputable waste collector should be employed by the Contractor to remove general refuse from the site, separately from construction and chemical wastes, on a daily basis to minimise odour, pest and litter impacts.  The burning of refuse on construction sites is prohibited by law.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Waste Disposal Ordinance

Management of Waste Disposal

S 7.5.5

·     The contractor should open a billing account with EPD in accordance with the Waste Disposal (Charges for Disposal of Construction Waste) Regulation for the payment of disposal charges.  Every waste load transferred to government waste disposal facilities such as public fill, sorting facilities, landfills or transfer station would required a valid “chit” which contain the information of the account holder to facilitate waste transaction recording and billing to the waste producer.  A trip-ticket system should also be established in accordance with Works Bureau Technical Circular No. 31/2004 to monitor the disposal of solid wastes at transfer station/landfills, and to control fly-tipping.  The billing “chit” and trip-ticket system will be included as one of the contractual requirements and implemented by the contractor.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

WBTC No 31/2004, Trip Ticket System for Disposal of Construction & Demolition Materials

 

S 7.5.5

·     A recording system for the amount of waste generated, recycled and disposed of (including the disposal sites) should be established during the construction stage.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

WBTC No 31/2004, Trip Ticket System for Disposal of Construction & Demolition Materials

 


 

Staff Training

S 7.5.6

·     Training should be provided to workers on the concepts of site cleanliness and on appropriate waste management procedures, including waste reduction, reuse and recycling at the beginning of the Contract.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

-

LAND CONTAMINATION –CONSTRUCTION PHASE

The following mitigation measures should be implemented during the construction of the karting track:

Construction Runoff and Drainage

Construction site runoff and drainage should be prevented or minimized in accordance with the guidelines stipulated in the EPD Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94), so as to prevent any potential spillage of fuel or oils from entering the soil or storm water drains.  The practices include the following items:

S 8.5.1

·     Maintenance of heavy-duty machinery shall be minimised and should be carried out off-site.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94)

S 8.5.1

·     Exposed soil surface shall be covered by tarpaulin as soon as possible to minimise exposure of soil to potential contaminating sources.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94)

S 8.5.1

·     Provision of perimeter channels to intercept storm-runoff from outside the site.  These shall be constructed in advance of site formation works and earthworks.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94)

S 8.5.1

·     The section of the road between the wheel washing facilities and the public road shall be paved with backfall to prevent wash water or other site runoff from entering public road drains.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94)


 


General Construction Activities

S 8.5.1

·     All fuel tank 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.  Open storm water drains and culverts near the works area shall be covered to block the entrance of large debris and refuse.

Within the construction site/Throughout the construction period

Contractor

 

ü

 

 

-

LAND CONTAMINATION –OPERATIONAL PHASE

Although no unacceptable land contamination impact is anticipated during the operational phase, the following measures are recommended:

S 8.5.2

Paving of servicing area

·     The servicing area, vehicle washing bays, lubrication bays and repair / maintenance area would be properly paved by concrete.  In addition, the servicing area should be located within roofed areas.  The drainage serving the servicing area and oil filling point would be connected to storm drains via a petrol interceptor with peak storm bypass.  Therefore, it is considered unlikely to produce any quantifiable adverse land contamination impacts.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

S 8.5.2

Minimal and controlled refilling activities

·     From the desktop review and site survey results, the fuel tank capacity of the kart is relatively small, i.e., about 3 litres, and refilling is required once or twice a day.  The refilling time would be about 15 seconds.  The maximum number of karts allowed on the track for training or rental run is 40 and 34 for match.  Given the small tank capacity and infrequent refilling activities, the quantities of petroleum hydrocarbon products to be used on site would be minimal.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

S 8.5.2

·     All the re-fuelling activities and repair and maintenance activities will be carried out under concrete-paved areas.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

S 8.5.2

Other Measures

·     All karting activities should only be undertaken on asphaltic concrete paved tracks;

·     Maintenance of karts should be performed regularly to avoid leakage of fuel on tracks;

·     Proper handling of petrol storage tank to avoid leakage of petrol, including the use of a secondary containment of a capacity equal to 110% of the storage capacity of the largest tank and a roof cover to separate rainfall;

·     Service area and repair / maintenance area should be concrete-paved;

·     Drainage serving the open oil filling point should be connected to storm drains via a petrol interceptor with peak storm bypass;

·     Vehicle and plant servicing areas, vehicle wash bays and lubrication bays should be located within roofed areas.  The drainage in these covered areas should be connected to foul sewers via a petrol interceptor; and

·     Oil leakage or spillage should be contained and cleaned up immediately.  Waste oil should be collected and stored for recycling or disposal in accordance with the Waste Disposal Ordinance.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

S 8.5.2

Hazard

·     Smoking is prohibited within the site area;

·     Extinguishers and fire-fighting sand are located along the track at 100m interval;

·     Extinguishers are provided in the office and the servicing area;

·     Re-fuelling should only be undertaken within the service area;

·     Only one tank of petrol with a maximum 18 litre is to be stored in a safety petrol tank within the servicing area;

·     No petrol should be stored on site overnight; and

·     Maintenance of karts should be performed regularly to avoid leakage of fuels on tracks.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

 

Should there be an accident with fire, all activities within the track would be stopped compulsorily and staff members will perform fire fighting using the extinguisher and/or the fire-fighting sand.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

LANDSCAPE AND VISUAL – CONSTRUCTION PHASE

No mitigation measures are required as no felling of trees or slope cutting is required and the visual and landscape impacts are low.

LANDSCAPE AND VISUAL - OPERATIONAL PHASE

S 9.10.2

·     To reinforce the existing screening, climbers will be established on the external fence and bamboo will be planted around the site boundaries in the southern area of the site.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-

S 9.10.2

·     The colour of the maintenance structures will be painted green to minimize any potential visual impacts.

At karting track/throughout the operational year

HGH Limited

 

 

ü

 

-