13. Implementation Schedule

13.1 General

Table 13.1: Implementation Schedule

Implementation Stage¹

EIA Ref.

EM&A Ref.

Environmental Protection Measures

Location / Duration of measures / Timing of completion of measures

Implementation Agent

Des

Con

Dec

Relevant Legislation & Guidelines

Air Quality Impact (Construction)

3.7.1.1

General Dust Control Measures

Frequent water spraying for active construction areas (12 times a day or once every one hour), including Heavy construction activities such as construction of buildings or roads, drilling, ground excavation, cut and fill operations (i.e., earth moving)

Within WKCD site / Duration of the construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIA Recommendation and Air Pollution Control (Construction Dust) Regulation

3.7.1.2

Best Practice For Dust Control

The relevant best practices for dust control as stipulated in the Air Pollution Control (construction Dust) Regulation should be adopted to further reduce the construction dust impacts from the Project. These best practices include:

Good Site Management

¡ Good site management is important to help reducing potential air quality impact down to an acceptable level. As a general guide, the Contractor should maintain high standard of housekeeping to prevent emission of fugitive dust. Loading, unloading, handling and storage of raw materials, wastes or by-products should be carried out in a manner so as to minimise the release of visible dust emission. Any piles of materials accumulated on or around the work areas should be cleaned up regularly. Cleaning, repair and maintenance of all plant facilities within the work areas should be carried out in a manner minimising generation of fugitive dust emissions. The material should be handled properly to prevent fugitive dust emission before cleaning.

Disturbed Parts of the Roads

¡ Each and every main temporary access should be paved with concrete, bituminous hardcore materials or metal plates and kept clear of dusty materials; or

¡ Unpaved parts of the road should be sprayed with water or a dust suppression chemical so as to keep the entire road surface wet.

Exposed Earth

¡ Exposed earth should be properly treated by compaction, hydroseeding, vegetation planting or seating with latex, vinyl, bitumen within six months after the last construction activity on the site or part of the site where the exposed earth lies.

Loading, Unloading or Transfer of Dusty Materials

¡ All dusty materials should be sprayed with water immediately prior to any loading or transfer operation so as to keep the dusty material wet.

Debris Handling

¡ Any debris should be covered entirely by impervious sheeting or stored in a debris collection area sheltered on the top and the three sides.

¡ Before debris is dumped into a chute, water should be sprayed so that it remains wet when it is dumped.

Transport of Dusty Materials

¡ Vehicle used for transporting dusty materials/spoils should be covered with tarpaulin or similar material. The cover should extend over the edges of the sides and tailboards.

Wheel washing

¡ Vehicle wheel washing facilities should be provided at each construction site exit. Immediately before leaving the construction site, every vehicle should be washed to remove any dusty materials from its body and wheels.

Use of vehicles

¡ The speed of the trucks within the site should be controlled to about 10km/hour in order to reduce adverse dust impacts and secure the safe movement around the site.

¡ Immediately before leaving the construction site, every vehicle should be washed to remove any dusty materials from its body and wheels.

¡ Where a vehicle leaving the construction site is carrying a load of dusty materials, the load should be covered entirely by clean impervious sheeting to ensure that the dusty materials do not leak from the vehicle.

Site hoarding

¡ Where a site boundary adjoins a road, street, service lane or other area accessible to the public, hoarding of not less than 2.4m high from ground level should be provided along the entire length of that portion of the site boundary except for a site entrance or exit.

Within WKCD site / Duration of the construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIA Recommendation and Air Pollution Control (Construction Dust) Regulation

3.7.1.3

Best Practicable Means for Cement Works (Concrete Batching Plant)

The relevant best practices for dust control as stipulated in the Guidance Note on the Best Practicable Means for Cement Works (Concrete Batching Plant) BPM 3/2(93) should be followed and implemented to further reduce the construction dust impacts of the Project. These best practices include:

Exhaust from Dust Arrestment Plant

¡ Wherever possible the final discharge point from particulate matter arrestment plant, where is not necessary to achieve dispersion from residual pollutants, should be at low level to minimise the effect on the local community in the case of abnormal emissions and to facilitate maintenance and inspection

Emission Limits

¡ All emissions to air, other than steam or water vapour, shall be colourless and free from persistent mist or smoke

Engineering Design/Technical Requirements

¡ As a general guidance, the loading, unloading, handling and storage of fuel, raw materials, products, wastes or by-products should be carried out in a manner so as to prevent the release of visible dust and/or other noxious or offensive emissions

Within WKCD site / Duration of the construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIA recommendation; Guidance Note on the Best Practicable Means for Cement Works (Concrete Batching Plant) BPM 3/2(93)

Air Quality Impact (Operation)

3.7.2

Vehicular and Marine Emissions

No mitigation measure is required.

3.7.3.1

Improvement works for New Yau Ma Tei Typhoon Shelter (NYMTTS) for Odour Mitigation

¡ Implementation of the DSD’s project to install new Dry Weather Flow Interceptor (DWFI) for Cherry Street Box Culvert.

New Yau Ma Tei Typhoon Shelter /

Early 2014 to 2^nd half of 2018 (subject to successful bid for funding)

DSD

EIA recommendation

¡ Improvement of three existing DWFIs upstream of Cherry Street Box Culvert and/or two existing DWFIs upstream of Jordan Road Box Culvert as part of the project titled “Upgrading of West Kowloon and Tsuen Wan Sewerage”.

New Yau Ma Tei Typhoon Shelter /

2016 to end 2023 (subject to successful bid for funding)

DSD

EIA recommendation

3.7.3.2

Optional Waste facilities

This facility will be located at basement levels. In addition, the odour containment and control measures to be implemented include:

¡ The waste facilities will be totally enclosed. Negative pressure ventilation will be provided within the enclosures to avoid any fugitive odorous emission from the facilities. In addition, any waste storage tanks will be connected to deodorisation facilities directly to eliminate the odour problem.

¡ Air inside the enclosures will be collected by air handling equipment for containing and directing odorous gases to deodorisation facilities.

¡ Deodorisation facilities by chemical, biological or physical methods (e.g. adsorption by activated carbon) with a minimum odour removal efficiency of 95% will be provided to treat potential odorous emissions from the facilities so as to minimise any potential odour impact to the nearby ASRs.

Within WKCD site / Duration and timing to be determined

WKCDA

EIA recommendation

Noise Impact (Construction)

4.7.1

Good Site Practice

Good site practice and noise management can significantly reduce the impact of construction site activities on nearby NSRs. The following package of measures should be followed during each phase of construction:

¡ only well-maintained plant to be operated on-site and plant should be serviced regularly during the construction works;

¡ machines and plant that may be in intermittent use to be shut down between work periods or should be throttled down to a minimum;

¡ plant known to emit noise strongly in one direction, should, where possible, be orientated to direct noise away from the NSRs;

¡ mobile plant should be sited as far away from NSRs as possible; and

¡ material stockpiles and other structures to be effectively utilised, where practicable, to screen noise from on-site construction activities.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIAO and Noise Control Ordinance

4.7.1

Adoption of Quieter PME

The recommended quieter PME adopted in the assessment were taken from the EPD’s QPME Inventory and “Sound Power Levels of Other Commonly Used PME”. It should be noted that the silenced PME selected for assessment can be found in Hong Kong.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIAO and Noise Control Ordinance

4.7.1

Use of Movable Noise Barriers

Movable noise barriers can be very effective in screening noise from particular items of plant when constructing the Project. Noise barriers located along the active works area close to the noise generating component of a PME could produce at least 10 dB(A) screening for stationary plant and 5 dB(A) for mobile plant provided the direct line of sight between the PME and the NSRs is blocked.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIAO and Noise Control Ordinance

4.7.1

Use of Noise Enclosure/ Acoustic Shed

The use of noise enclosure or acoustic shed is to cover stationary PME such as air compressor and concrete pump. With the adoption of the noise enclosure, the PME could be completely screened, and noise reduction of 15 dB(A) can be achieved according to the EIAO Guidance Note No.9/2010.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIAO and Noise Control Ordinance

4.7.1

Use of Noise Insulating Fabric

Noise insulating fabric can also be adopted for certain PME (e.g. drill rig, pilling machine etc). The fabric should be lapped such that there are no openings or gaps on the joints. According to the approved Tsim Sha Tsui Station Northern Subway EIA report (AEIAR-127/2008), a noise reduction of 10 dB(A) can be achieved for the PME lapped with the noise insulating fabric.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIAO and Noise Control Ordinance

4.7.1

Scheduling of Construction Works outside School Examination Periods

During construction phase, the contractor should liaise with the educational institutions (including NSRs LCS and CRGPS) to obtain the examination schedule and avoid the noisy construction activities during school examination periods.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

EIAO and Noise Control Ordinance

Noise Impact (Operation)

4.7.2

Road Traffic Noise

At-receiver mitigation measures should be considered in terms of self-protecting building design such as shielding by balcony.

The balcony shall be designed with depth more than 1m with solid parapet of about 1.5m high and ceiling lined with absorptive material to face the noise source at Parcels 3, 5, 9, 24, 27, 28 & 29.

Along parts of Austin Road West and Canton Road / During operation phase / Throughout operation phase

Design Architect / Contractor appointed by WKCDA

EIAO

4.7.2

3.2

Road Traffic Noise

Sound-absorbing materials should be installed on inner walls and ceilings of the underpass at the portals at the junction of Lin Cheung Road and Austin Road West, interim access of Austin Road West and permanent access at Canton Road. The sound-absorbing materials would be extended at least 30m into the underpass at the portals.

Portal at the junction of Lin Cheung Road and Austin Road West, Interim Access at Austin Road West and Permanent access at Canton Road / Before commencement of operation of road project

Contractor appointed by WKCDA / Highways Department

EIAO

4.7.3

Fixed Plant Noise

Specification of the maximum allowable sound power levels of the proposed fixed plants during daytime and night-time should be followed.

The following noise reduction measures should be considered as far as practicable during operation:

¡ Choose quieter plant such as those which have been effectively silenced;

¡ Include noise levels specification when ordering new plant (including chillier and E/M equipment);

¡ Locate fixed plant/louvre away from any NSRs as far as practicable;

¡ Locate fixed plant in walled plant rooms or in specially designed enclosures;

¡ Locate noisy machines in a basement or a completely separate building;

¡ Install direct noise mitigation measures including silencers, acoustic louvres and acoustic enclosure where necessary; and

¡ Develop and implement a regularly scheduled plant maintenance programme so that equipment is properly operated and serviced in order to maintain a controlled level of noise.

Within WKCD site / During operation phase / Throughout operation phase

Design Architect / Contractor appointed by WKCDA

EIAO and Noise Control Ordinance

4.7.5

Ground-borne Noise

Given stringent acoustic performance requirement for this world-class venues, noise and vibration control measures such as building isolation and or box-in-box installation would be required by the acoustic and theatre designers of to the Xiqu Centre, M+ (Phase I & II), Lyric Centre and CCP. The exact measures to be adopted are subject to the later detailed structural and foundation designs of the art performance venues.

Within WKCD site / During operation phase / Prior to commencement of operation

Design Architect / Contractor appointed by WKCDA

EIAO

4.7.7

Marine Traffic Noise

At-receiver mitigation measures by designing the buildings so as to avoid any sensitive façades with openable window facing the noise source at Parcels 2, 3, 10, 11, 13, 21, 26 and 32 are proposed.

Within WKCD site / During operation phase / Throughout operation phase

Design Architect / Contractor appointed by WKCDA

EIAO

Water Quality Impact (Construction)

5.7.1.1

Construction site runoff and drainage

The site practices outlined in ProPECC Note PN 1/94 should be followed as far as practicable in order to minimise surface runoff and the chance of erosion. The following measures are recommended to protect water quality and sensitive uses of the coastal area, and when properly implemented should be sufficient to adequately control site discharges so as to avoid water quality impacts:

¡ At the start of site establishment, perimeter cut-off drains to direct off-site water around the site should be constructed with internal drainage works and erosion and sedimentation control facilities implemented. Channels, earth bunds or sand bag barriers should be provided on site to direct storm water to silt removal facilities. The design of the temporary on-site drainage system should be undertaken by the WKCDA’s Contractor prior to the commencement of construction;

¡ Sand/silt removal facilities such as sand/silt traps and sediment basins should be provided to remove sand/silt particles from runoff to meet the requirements of the TM standards under the WPCO. The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC Note PN 1/94. Sizes may vary depending upon the flow rate. The detailed design of the sand/silt traps should be undertaken by the WKCDA’s Contractor prior to the commencement of construction.

¡ All drainage facilities and erosion and sediment control structures should be regularly inspected and maintained to ensure proper and efficient operation at all times and particularly during rainstorms. Deposited silt and grit should be regularly removed, at the onset of and after each rainstorm to ensure that these facilities are functioning properly at all times.

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

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

¡ Open stockpiles of construction materials or construction wastes on-site should be covered with tarpaulin or similar fabric during rainstorms. Measures should be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system.

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

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

¡ Bentonite slurries used in piling or slurry walling should be reconditioned and reused wherever practicable. Temporary enclosed storage locations should be provided on-site for any unused bentonite that needs to be transported away after all the related construction activities are completed. The requirements in ProPECC Note PN 1/94 should be adhered to in the handling and disposal of bentonite slurries.

Within WKCD site / Duration of the construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

ProPECC Note PN 1/94

5.7.1.2

Modification of seawall and Construction of landing steps and possible piers/viewing platform

To minimise any adverse water quality impact during modification of seawalls for construction of cooling water discharges/outfalls and landing steps and installation of marine piles for construction of the possible piers, silt curtains should be deployed to completely enclose the modification of seawalls and marine pile installation works. The Contractor should be responsible for the design, installation and maintenance of the silt curtains to minimize the impacts on water quality. The design and specification of the silt curtains should be submitted by the Contractor to the Engineer for approval.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

WPCO

5.7.1.3

Barging facilities and activities

Recommendations for good site practices during operation of the proposed barging point include:

¡ All vessels should be sized so that adequate clearance is maintained between vessels and the seabed in all tide conditions, to ensure that undue turbidity is not generated by turbulence from vessel movement or propeller wash;

¡ Loading of barges and hoppers should be controlled to prevent splashing of material into the surrounding water. Barges or hoppers should not be filled to a level that will cause the overflow of materials or polluted water during loading or transportation;

¡ All hopper barges should be fitted with tight fitting seals to their bottom openings to prevent leakage of material; and

¡ Construction activities should not cause foam, oil, grease, scum, litter or other objectionable matter to be present on the water within the site.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

WPCO

5.7.1.4

Sewage effluent from construction workforce

Temporary sanitary facilities, such as portable chemical toilets, should be employed on-site where necessary to handle sewage from the workforce. A licensed contractor should be employed to provide appropriate and adequate portable toilets and be responsible for appropriate disposal and maintenance.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

ProPECC Note PN 1/94

5.7.1.5

General construction activities

Construction solid waste, debris and refuse generated on-site should be collected, handled and disposed of properly to avoid entering any nearby storm water drain. Stockpiles of cement and other construction materials should be kept covered when not being used.

Oils and fuels should only be stored in designated areas which have pollution prevention facilities. To prevent spillage of fuels and solvents to any nearby storm water drain, all fuel tanks and storage areas should 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.

Within WKCD site / During construction phase / Prior to commencement of operation

Contractor appointed by WKCDA

ProPECC Note PN 1/94

Water Quality Impact (Operation)

5.7.2.1

Road and surface runoff

For operation of the proposed WKCD development and associated local road network, a surface water drainage system would be provided to collect road and surface runoff. It is recommended that the road drainage should be provided with adequately designed silt trap and oil interceptors, as necessary. The design of the operation stage mitigation measures for the proposed WKCD development and associated local road network should take into account the guidelines published in the Practice Note for Professional Persons on Drainage Plans Subject to Comment by the Environmental Protection Department (ProPECC Note PN 5/93) and Highways Department Guidance Notes RD/GN/035 – Road Pavement Drainage Design.

Within WKCD site / During operation phase / Throughout operation phase

HyD (for exclusive road drains)

ProPECC Note PN 5/93, Highways Department Guidance Notes RD/GN/035

5.7.2.2

Sewage and wastewater effluents from the proposed WKCD development

Domestic sewage generated during operation phase of the proposed WKCD development should be diverted to the foul sewer. Sewage and sewerage impact assessment had identified that the proposed WKCD development would not cause adverse impact to the local sewerage network which should have sufficient capacity to cater for the sewage flow generated from the proposed WKCD development. No mitigation measures and upgrading works to the existing local sewer are necessary for the proposed WKCD development. Recommendations for the design, operation and maintenance for the sewerage system are detailed below in the same table.

Within WKCD site / During operation phase / Throughout operation phase

WKCDA

WPCO

5.7.2.4

Emergency effluent bypass from optional sewage pump sump

The following mitigation measures are proposed to be incorporated in the design of the optional sewage pumping station:

¡ A two hour emergency storage capacity should be provided within the optional sewage pump sump accordingly to EPD Environmental Guidance Note for Sewage Pumping Stations (NOT a designated project);

¡ Dual power supply or emergency generator with sufficient capacity (100%) should be provided to the optional sewage pump sump to secure electrical power supply;

¡ Standby pumps with sufficient capacity (100%) should be provided to the optional sewage pump sump to ensure smooth operation of the optional sewage pumping station during maintenance of the duty pumps;

¡ An alarm should be installed to signal emergency high water level in the wet well of the optional sewage pump sump; and

¡ Should the optional sewage pump sump is unmanned, a remote monitor system connecting the optional sewage pump sump with the control station through telemetry system should be provided to ensure swift actions to be taken in case of malfunction of the optional sewage pump sump.

Within WKCD site / During design and operation phases / Throughout operation phase

WKCDA

DSD’s Sewerage Manual; EPD Environmental Guidance Note for Sewage Pumping Stations

5.7.2.5

Improvement works for New Yau Ma Tei Typhoon Shelter (NYMTTS) for Odour Mitigation

¡ Implementation of the DSD’s project to install new Dry Weather Flow Interceptor (DWFI) for Cherry Street Box Culvert; and

New Yau Ma Tei Typhoon Shelter /

Early 2014 to 2^nd half of 2018 (subject to successful bid for funding)

DSD

EIA recommendation

New Yau Ma Tei Typhoon Shelter /

2016 to end 2023 (subject to successful bid for funding)

DSD

EIA recommendation

5.7.2.6

Water reuse facilities

Regarding collection and treatment of rainwater, individual venue operators should follow Architectural Services Department (ASD) Design Guideline for Rainwater Recycling Installation with typical schematic design of a rainwater recycling installation and recommended recycled rainwater standard with reference to the international standards, such as EPA of USA etc. as detailed in Table 5.11 in the EIA Report during design and operation of the facilities. Disinfection by chemical treatment and monitoring should be implemented for reuse of condensate from air conditioning systems. As the demand for reclaimed water is significant, discharge of surplus reclaimed water is not anticipated.

Within WKCD site / During design and operation phases / Throughout operation phase

Individual venue operators; Detailed Design Consultant appointed by WKCDA

ASD Design Guideline for Rainwater Recycling Installation; USEPA Guidelines for water reuse

5.7.2.7

Thermal / Cooled Water Discharge from District Cooling System

¡ Monitoring for the spent cooling water discharge from DCWS during operation should follow the requirements as specified in the discharge license to be issued under the WPCO. Details of the water quality monitoring and audit programme and the Event and Action Plan are provided in the stand-alone EM&A Manual.

Within WKCD site / During design and operation phases / Throughout operation phase

Individual venue operators; Detailed Design Consultant appointed by WKCDA

WPCO

Sewerage and Sewage Treatment Implications (Design)

6.7.1.1

General Requirements

The detailed design of the proposed sewerage system should be circulated to DSD, EPD and other relevant parties for comment during planning and detailed design stage to ensure acceptance by relevant parties. Access for plant, equipment and personnel for maintenance of the works should be adequately provided. A plan showing the maintenance access to the proposed sewers has been provided in Figure 6.5.

Within WKCD site / During detailed design stage / Prior to commencement of construction

Detailed Design Consultant appointed by WKCDA

DSD’s Stormwater Drainage Manual; DSD’s Sewerage Manual Part 1 & Part 2; DSD Standard Drawings; and HyD’s Structures Design Manual for Highways and Railways

6.7.1.2

Gravity Sewers

The design of gravity sewers should be according to the guidelines stipulated in Sewerage Manual Part 1. The general requirements are summarized below:

¡ Pipe size: The minimum pipe size of gravity sewer is 225mm in diameter.

¡ Capacity: The gravity sewer should be designed to avoid under surcharge condition. 1m freeboard should be provided if surcharge condition cannot be avoided.

¡ Flow velocity: The flow velocity should be not less than 1m/s under full bore flow for self-cleansing purpose. The maximum velocity should be limited to 3m/s.

¡ Alignment: The alignment of the proposed sewer should be reviewed to avoid conflicting with existing utilities and affecting traffic flow as far as possible.

¡ Hydraulic Design: The detailed hydraulic design should follow the guidelines provided under Section 5.2 of Sewerage Manual Part 1.

¡ Pipe Material: Selection of pipe material shall be based on its suitability for the proposed application. The selection process includes an evaluation of the possible conditions to which the pipes may be exposed in order to specify the appropriate material and installation requirements for the specific application.

¡ Pipe Joints: In order to accommodate differential settlement that may occur between sewers and adjacent structures (including manholes), two flexible joints shall be provided in accordance with the latest amendment of General Specification for Civil Engineering Works 2006 Edition Volume 1 Clause 5.71 – Connections to structures in providing the flexible joints to structures.

¡ Pipeline Structural Design: The structural checking and bedding design should in accordance with Section 6 of Sewerage Manual Part 1.

Within WKCD site / During detailed design stage / Prior to commencement of construction

Detailed Design Consultant appointed by WKCDA

DSD’s Sewerage Manual Part 1

6.7.1.3

Manholes Design

The design of manholes should be in accordance with Section 7 of Sewerage Manual Part 1.

¡ Location: Manholes should be provided at all changes in direction, at intersections and to suit property connections. The maximum spacing between manholes should be as follows:

Diameter of Pipe (mm)	Maximum Intervals (m)
Smaller than 600	40
Between 600 – 1050	80
Larger than 1050	120

¡ Access Openings/Shafts: Desilting opening should not be smaller than 750mm by 900mm and should be placed in the line of the sewer. The man access opening with minimum size of 675mm x 750mm should be provided at manholes. Man access openings should be placed off the line of the sewer for deep manhole and along the line of the sewer for manholes shallower than 1.2m.

¡ Working Chambers: Working Chambers should be provided to manholes deeper than 1.2m.

¡ Intermediate Platforms: When the invert of a manhole is more than 4.25m from the cover level, intermediate platforms should be provided at regular intervals. The headroom between platforms should not be less than 2m nor greater than 4m. Hand railing and safety chains should be provided at the edge of platform to protect persons from falling down. The minimum size of platform should is 800mm by 1350mm.

¡ Covers: The manhole cover should be designed strong enough to take the design loading and should not rock when initially placed in position or develop a rock with wear. The design of manhole covers should make reference to DSD standard drawings.

¡ Backdrop Manhole: When the level difference between the inlet pipe and the invert level of manhole is greater than 600mm, backdrop manhole should be used. The design of backdrop manhole should follow guidelines under Section 7.1.9 in Sewerage Manual Part 1.

¡ Step-irons/Cat Ladder: Step-irons should be securely fixed in position and should be equally spaced and staggered about a vertical line at 300mm centres. Cat ladders should be used in manholes deeper than 4.25m or where manholes are frequently entered. Set-irons and ladders should be start at not more than 600mm below the cover level and continue to the platform or benching. Corrosion resistance materials should be used if step-irons and ladders are constantly in a damp atmosphere and prone to corrosion.

Within WKCD site / During detailed design stage / Prior to commencement of construction

Detailed Design Consultant appointed by WKCDA

DSD’s Sewerage Manual Part 1

6.7.1.4

Sump Pumps Design

The design of sewage sump pumps should follow the requirements stipulated in the Sewerage Manual Part 2.

¡ The number of pumps to be installed depends on the sump capacity. Standby pumps should be provided to ensure the operation can still be maintained during maintenance or mechanical failure.

¡ The selected electrical equipment shall be suitable to operate under high humidity, high temperature and presence of corrosive gases.

¡ Appropriate mitigation measures to control noise and odour problems should be designed under detailed design stage. The typical methods for noise and odour control could refer to the Sewerage Manual Part 2.

¡ In order to control the septicity of sewage due to operation of sewage pumping facilities, the retention time of sewage should be minimized. Pumps with different small rate should be considered for reducing the time of retention of sewage. Direct injection of oxygen could also be used to control septicity. The mitigation methods should be considered under detailed design stage.

¡ Fresh water should be provided for the operation and maintenance staff for hygienic reasons.

Within WKCD site / During detailed design stage / Prior to commencement of construction

Detailed Design Consultant appointed by WKCDA

DSD’s Sewerage Manual Part 2

6.7.1.5

Rising Mains Design

The design of rising main should follow the requirement stipulated in the Sewerage Manual Part 2.

Twin rising mains should be provided as far as possible because of the following reasons:

¡ To accommodate a wide range of flow conditions such that the velocity in the mains can be kept within acceptable limits;

¡ To provide continued operation when one of the mains is damaged; and

¡ To facilities future inspection and maintenance while the normal sewage flow can be maintained.

The maximum velocity at peak flow should not exceed 3m/s. The desirable range of velocity should be 1m/s to 2m/s with due consideration given to the various combinations of number of duty pumps in operation.

Air relief valves, check valves, isolating valves and discharge sumps shall be provided in accordance to the Sewerage Manual Part 2.

Septicity control methods for rising mains, such as oxygen injection and reducing retention time of sewage, should be designed under detailed design stage.

Within WKCD site / During detailed design stage / Prior to commencement of construction

Detailed Design Consultant appointed by WKCDA

DSD’s Sewerage Manual Part 2

6.7.1.6

Thrust Blocks for Rising Mains

Thrust blocks should be provided to rising mains to prevent pipes from being moved by forces exerted within the pipe by the flow of water hitting bends, tapers, and closed or partially closed valves. The size of a thrust block is dependent upon the deflection of the flow and the head of water inside the pipe. Design of thrust block should refer to DSD Sewerage Manual Part 2.

Within WKCD site / During detailed design stage / Prior to commencement of construction

Detailed Design Consultant appointed by WKCDA

DSD’s Sewerage Manual Part 2

Sewerage and Sewage Treatment Implications (Operation)

6.7.1.7

Inspection and General Maintenance Operations

All gravity sewers and rising mains shall be tested in accordance with relevant General Specification sections as appropriate in the presence and to the satisfaction of the staff of DSD upon completion of the installation.

Records of satisfactory testing on the completed works shall be submitted to DSD after the testing. CCTV survey records, as-built drawings and hydraulic and structural design calculations should be submitted to DSD for records.

Within WKCD site / From several days to several weeks / Upon completion of installation

WKCDA

CEDD’s General Specification for Civil Engineering Works

Waste Management Implications (Construction)

7.5.1.1

Good Site Practices

Recommendations for good site practices during the construction activities include:

¡ 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

¡ Training of site personnel in proper waste management and chemical handling procedures

¡ Provision of sufficient waste disposal points and regular collection of waste

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

¡ Provision of wheel washing facilities before the trucks leaving the works area so as to minimise dust introduction to public roads

¡ Well planned delivery programme for offsite disposal such that adverse environmental impact from transporting the inert or non-inert C&D materials is not anticipated

WKCD construction site / Throughout construction stage / Until completion of all construction activities

Contractor appointed by WKCDA

Waste Disposal Ordinance; Waste Disposal (Chemical Wastes) (General) Regulation; and Technical Circular (Works) No. 19/2005 Environmental Management on Construction Site

7.5.1.2

Waste Reduction Measures

Recommendations to achieve waste reduction include:

¡ Sort inert C&D materials to recover any recyclable portions such as metals

¡ Segregation and storage of different types of waste in different containers or skips to enhance reuse or recycling of materials and their proper disposal

¡ Encourage collection of recyclable waste such as waste paper and aluminium cans by providing separate labelled bins to enable such waste to be segregated from other general refuse generated by the work force

¡ Proper site practices to minimise the potential for damage or contamination of inert C&D materials

¡ Plan the use of construction materials carefully to minimise amount of waste generated and avoid unnecessary generation of waste

WKCD construction site / Throughout construction stage / Until completion of all construction activities

Contractor appointed by WKCDA

Waste Disposal Ordinance

7.5.1.3

Inert and Non-inert C&D Materials

In order to minimise impacts resulting from collection and transportation of inert C&D materials for off-site disposal, the excavated materials should be reused on-site as fill material as far as practicable. In addition, inert C&D materials generated from excavation works could be reused as fill materials in local projects that require public fill for reclamation.

¡ The surplus inert C&D materials will be disposed of at the Government’s PFRFs for beneficial use by other projects in Hong Kong.

¡ Liaison with the CEDD Public Fill Committee (PFC) on the allocation of space for disposal of the inert C&D materials at PFRF is underway. No construction work is allowed to proceed until all issues on management of inert C&D materials have been resolved and all relevant arrangements have been endorsed by the relevant authorities including PFC and EPD.

¡ The C&D materials generated from general site clearance should be sorted on site to segregate any inert materials for reuse or disposal of at PFRFs whereas the non-inert materials will be disposed of at the designated landfill site.

¡ In order to monitor the disposal of inert and non-inert C&D materials at respectively PFRFs and the designated landfill site, and to control fly-tipping, it is recommended that the Contractor should follow the Technical Circular (Works) No.6/2010 for Trip Ticket System for Disposal of Construction & Demolition Materials issued by Development Bureau. In addition, it is also recommended that the Contractor should prepare and implement a Waste Management Plan detailing their various waste arising and waste management practices in accordance with the relevant requirements of the Technical Circular (Works) No. 19/2005 Environmental Management on Construction Site.

WKCD construction site / Throughout construction stage / Until completion of all construction activities

Contractor appointed by WKCDA

Waste Disposal Ordinance ; Technical Circular (Works) No.6/2010 for Trip Ticket System for Disposal of Construction & Demolition Materials; and Technical Circular (Works) No. 19/2005 Environmental Management on Construction Site

7.5.1.4

Chemical Waste

If chemical wastes are produced at the construction site, the Contractor will be required to register with the EPD as a chemical waste producer and to follow the guidelines stated in the “Code of Practice on the Packaging Labelling and Storage of Chemical Wastes”. Good quality containers compatible with the chemical wastes should be used, and incompatible chemicals should be stored separately. Appropriate labels should be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste, such as explosive, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc. The Contractor should use a licensed collector to transport and dispose of the chemical wastes at the approved Chemical Waste Treatment Centre or other licensed recycling facilities, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

Potential environmental impacts arising from the handling activities (including storage, collection, transportation and disposal of chemical waste) are expected to be minimal with the implementation of appropriate mitigation measures as recommended.

WKCD construction site / Throughout construction stage / Until completion of all construction activities

Contractor appointed by WKCDA

Code of Practice on the Packaging Labelling and Storage of Chemical Wastes; Waste Disposal (Chemical Waste) (General) Regulation

7.5.1.5

General Refuse

General refuse should be stored in enclosed bins or compaction units separated from inert C&D materials. A reputable waste collector should be employed by the Contractor to remove general refuse from the site, separately from inert C&D materials. Preferably an enclosed and covered area should be provided to reduce the occurrence of 'wind blown' light material.

WKCD construction site / Throughout construction stage / Until completion of all construction activities

Contractor appointed by WKCDA

Waste Disposal Ordinance and Public Health and Municipal Services Ordinance - Public Cleansing and Prevention of Nuisances Regulation

Waste Management Implications (Operation)

7.5.2.1

General Refuse

General refuse should be collected on daily basis and delivered to the refuse collection point accordingly. A reputable waste collector should be employed to remove general refuse regularly to avoid odour nuisance or pest/vermin problem. Sufficient recycling containers are recommended to be provided at suitable locations of the WKCD site to encourage recycling of such waste as aluminium cans, plastics and waste paper.

WKCD site / On a regular basis / Throughout operation stage

Private Developer (for land sale lots); Relevant Government Departments e.g. FEHD / LCSD (for Government / public facilities)

WKCDA (for WKCDA facilities)

Waste Disposal Ordinance and Public Health and Municipal Services Ordinance - Public Cleansing and Prevention of Nuisances Regulation

7.5.2.2

Chemical Waste

If chemical wastes are expected to be produced during the operation phase, the Project Proponent should register with the EPD as a chemical waste producer and follow the guidelines stated in the “Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes”. Good quality containers compatible with the chemical wastes should be used, and incompatible chemicals should be stored separately. Appropriate labels should be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste, such as explosive, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc. Licensed collector should be deployed to transport and dispose of the chemical wastes at the approved Chemical Waste Treatment Centre or other licensed recycling facilities, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

WKCD site / On a regular basis / Throughout operation stage

Private Developer (for land sale lots); Relevant Government Departments e.g. FEHD / LCSD (for Government / public facilities)

WKCDA (for WKCDA facilities)

Code of Practice on the Packaging Labelling and Storage of Chemical Wastes; Waste Disposal (Chemical Waste) (General) Regulation

Land Contamination (Construction)

8.6

The potential for land contamination issues at the TST Fire Station due to its future relocation will be confirmed by site investigation after land acquisition. Where necessary, mitigation measures for minimising potential exposure to contaminated materials (if any) or remediation measures will be identified. If contaminated land is identified (e.g., during decommissioning of fuel oil storage tanks) after the commencement of works, mitigation measures are proposed in order to minimise the potentially adverse effects on the health and safety of construction workers and impacts arising from the disposal of potentially contaminated materials.

The following measures are proposed for excavation and transportation of contaminated material:

¡ To minimize the chance for construction workers to come into contact with any contaminated materials, bulk earth-moving excavation equipment should be employed;

¡ Contact with contaminated materials can be minimised by wearing appropriate clothing and personal protective equipment such as gloves and masks (especially when interacting directly with contaminated material), provision of washing facilities and prohibition of smoking and eating on site;

¡ Stockpiling of contaminated excavated materials on site should be avoided as far as possible;

¡ The use of contaminated soil for landscaping purpose should be avoided unless pre-treatment was carried out;

¡ Vehicles containing any contaminated excavated materials should be suitably covered to reduce dust emissions and/or release of contaminated wastewater;

¡ Truck bodies and tailgates should be sealed to stop any discharge;

¡ Only licensed waste haulers should be used to collect and transport contaminated material to treatment/disposal site and should be equipped with tracking system to avoid fly tipping;

¡ Speed control for trucks carrying contaminated materials should be exercised;

¡ Observe all relevant regulations in relation to waste handling, such as Waste Disposal Ordinance (Cap 354), Waste Disposal (Chemical Waste) (General) Regulation (Cap 354) and obtain all necessary permits where required; and

¡ Maintain records of waste generation and disposal quantities and disposal arrangements.

Site of the existing Tsim Sha Tsui Fire Station / During excavation activities / Prior to construction of WKCD facilities

Contractor appointed by WKCDA

Waste Disposal Ordinance; and Waste Disposal (Chemical Waste) (General) Regulation

Land Contamination (Operation)

No mitigation measure is required.

Ecological Impact (Construction)

No mitigation measure is required.

Ecological Impact (Operation)

No mitigation measure is required.

Landscape and Visual Impact (Construction)

Table 10.18 (CM1)

Trees should be retained in situ on site as far as possible. Should tree removal be unavoidable due to construction impacts, trees will be transplanted or felled with reference to the stated criteria in the Tree Removal Applications to be submitted to relevant government departments for approval in accordance to ETWB TCW No. 29/2004 and 3/2006.

WKCD construction site / Throughout construction stage / Until completion of all construction activities

Contractor appointed by WKCDA

ETWB TCW No. 29/2004 and 3/2006

Table 10.18 (CM2)

Compensatory tree planting shall be incorporated to the proposed project and maximize the new tree, shrubs and other vegetation planting to compensate tree felled and vegetation removed. Also, implementation of compensatory planting should be of a ratio not less than 1:1 in terms of quality and quantity within the site.

WKCD Park and public areas / After completion of site formation / Prior to operation stage

Contractor appointed by WKCDA

ETWB TCW No. 3/2006

Table 10.18 (CM3)

Buffer trees for screening purposes to soften the hard architectural and engineering structures and facilities.

Alongside superstructures within WKCD / After completion of superstructure construction / Prior to operation stage

Contractor appointed by WKCDA

EIAO-TM

Table 10.18 (CM4)

Softscape treatments such as vertical green wall panel / planting of climbing and/or weeping plants, etc, to maximize the green coverage and soften the hard architectural and engineering structures and facilities.

Alongside superstructures within WKCD / After completion of superstructure construction / Prior to operation stage

Detailed Design Consultant / Contractor appointed by WKCDA

EIAO-TM

Table 10.18 (CM5)

Roof greening by means of intensive and extensive green roof to maximize the green coverage and improve aesthetic appeal and visual quality of the building / structure.

WKCD structures / After completion of superstructure construction / Prior to operation stage

Detailed Design Consultant / Contractor appointed by WKCDA

EIAO-TM

Table 10.18 (CM6)

Sensitive streetscape design should be incorporated along all new roads and streets.

Alongside roads and streets within WKCD / After completion of road and street construction / Prior to operation stage

Detailed Design Consultant / Contractor appointed by WKCDA

EIAO-TM

Table 10.18 (CM7)

Structure, ornamental planting shall be provided along amenity strips to enhance the landscape quality.

Alongside superstructures within WKCD / After completion of superstructure construction / Prior to operation stage

Contractor appointed by WKCDA

EIAO-TM

Table 10.18 (CM8)

Landscape design shall be incorporated to architectural and engineering structures in order to provide aesthetically pleasing designs.

WKCD structures / After completion of structure construction / Prior to operation stage

Detailed Design Consultant / Contractor appointed by WKCDA

EIAO-TM

Table 10.18 (CM9)

Minimize the structure of marine facilities to build on the seabed and foreshore in order to minimize the affected extent to the waterbody.

WKCD construction site / Throughout construction stage / Until completion of all construction activities

Detailed Design Consultant / Contractor appointed by WKCDA

EIAO-TM

Table 10.22

(MCP1)

Use of decorative screen hoarding/boards

WKCD construction sites / Throughout construction stage / Prior to operation stage

Contractor appointed by WKCDA

ETWB TCW No. 3/2006

Table 10.22

(MCP2)

Early introduction of landscape treatments

WKCD construction sites / Towards the end of construction stage / Prior to operation stage

Contractor appointed by WKCDA

EIAO-TM

Table 10.22

(MCP3)

Adoption of light colour for the temporary ventilation shafts for the basement during the transition period.

WKCD basement construction sites / After completion of ventilation shaft superstructure / Prior to operation stage

Design Architect / Contractor appointed by WKCDA

EIAO-TM

Table 10.22

(MCP4)

Control of night time lighting such as avoidance of lighting from spilling onto nearby residential developments.

WKCD construction sites / During night time / Throughout construction stage

Contractor appointed by WKCDA

EIAO-TM

Table 10.22

(MCP5)

Use of greenery such as grass cover for the temporary landscaped areas will reduce the visual impacts derived by the construction works in the surroundings within the WKCD site.

WKCD temporary landscaped areas / Throughout construction stage / Prior to operation stage

Contractor appointed by WKCDA

EIAO-TM

Landscape and Visual Impact (Operation)

Table 10.19 (OM1)

Provide proper planting establishment works, including watering, pruning, weeding, pest control, replacement of dead plant, etc, on the new planting areas to enhance the aesthetic design degree

WKCD open areas / Throughout operation phase / As-needed basis

Private Developer (for land sale lots); LCSD (for roadside planting)

WKCDA (for all other WKCD areas)

EIAO-TM

Table 10.19 (OM2)

Provision of open space in various forms and at different levels on or above ground, including park, waterfront promenade, piazzas and terrace garden and associated green connections for public enjoyment.

WKCD open areas / Throughout operation phase / As-needed basis

Private Developer (for land sale lots); LCSD (for roadside planting)

WKCDA (for all other WKCD areas)

EIAO-TM

Table 10.23

(GDF1)

Control of Development Heights and Massing and Distinctive Architectural Design)

With well designed low to medium-rise buildings, the proposed WKCD development is anticipated to be highly compatible with the surroundings.

WKCD buildings / During design stage / Throughout operation phase

Design Architect / Contractor appointed by WKCDA

EIAO-TM

Table 10.23

(GDF2)

Creation of View Corridor

The buildings on the WKCD site are designed to allow visual permeability from the WKT to Victoria Harbour, which is achieved by alignment of the buildings on the WKCD site.

WKCD buildings / During design stage / Throughout operation phase

Design Architect appointed by WKCDA

EIAO-TM

Table 10.23

(GDF3)

Preservation of Open Vista from the Heritage Sites

An open vista and green corridor from the heritage sites consisting of the declared monuments of St. Andrew’s Church, former Kowloon British School (now Antiques and Monuments Office) and Hong Kong Observatory through Kowloon Park, and along the WKCD waterfront promenade towards the Victoria Harbour is preserved.

WKCD open areas / During design stage / Throughout operation phase

Design Consultant appointed by WKCDA / WKCDA

EIAO-TM

Table 10.23

(GDF4)

Provision of Open Space

The open space will be provided in various forms at grade in the WKCD, including piazzas, a landscaped waterfront promenade and various green spaces.

WKCD open areas / During design stage / Throughout operation phase

Design Architect / Contractor appointed by WKCDA

EIAO-TM

Table 10.23

(GDF5)

Provision of Terrace Gardens

The unique designed terrace gardens are considered as a good design feature to lessen the visual impacts and provide new visual resources when viewed from the VSRs at higher levels.

WKCD open areas / During design stage / Throughout operation phase

Private Developer (for land sale lots); WKCDA (for WKCD facilities)

EIAO-TM

Table 10.23

(MOP1)

Undulating berms and the trees planted in the surroundings of the existing WHC and MTR ventilation buildings.

Around existing ventilation buildings within WKCD / During construction of WKCD Park / Throughout operation phase

Contractor appointed by WKCDA

EIAO-TM

Table 10.23

(MOP2)

Clusters of shade planting and appropriate landscaping are designed to provide a relaxing waterfront environment, soften the water edge and helps mitigate the visual impacts associated with the existing MTR & WHC ventilation buildings.

WKCD waterfront / During design stage / Throughout operation phase

Landscape Architect / Contractor appointed by WKCDA

EIAO-TM

Table 10.23

(MOP3)

The unique designed roof top gardens and green roof are considered as mitigation measures to lessen the visual impacts and provide new visual resources when viewed from the VSRs at higher levels.

WKCD open areas / During design stage / Throughout operation phase

Private Developer (for land sale lots); WKCDA (for WKCD facilities)

EIAO-TM

Table 10.23

(MOP4)

Buffer trees for screening purposes or other softscape treatments such as vertical green wall /climber /green roof /vertical greening shall be incorporated to soften the hard architectural and engineering structures and facilities.

Alongside superstructures within WKCD / After completion of superstructure construction / Throughout operation stage

Private Developer (for land sale lots); WKCDA (for WKCD facilities)

EIAO-TM

Table 10.23

(MOP5)

Use of natural colour tones (e.g. green colour) for wind turbines located along the waterfront, to make them visually more compatible with the surroundings.

WKCD waterfront / During design stage / Throughout operation phase

Design Architect / Contractor appointed by WKCDA

EIAO-TM

Table 10.23

(MOP 6)

Appropriate positioning and angling of the solar panels to avoid significant visual impacts on the VSRs located at upper levels in close proximity.

WKCD building rooftops / During daytime / Throughout operation stage

Private Developer (for land sale lots); WKCDA (for WKCD facilities)

EIAO-TM

Table 10.23

(MOP 7)

Aesthetic design of roads and streetscapes

Along WKCD roads and streets / During design stage / Throughout operation phase

Design Architect / Contractor appointed by WKCDA

EIAO-TM

Table 10.23

(MOP 8)

Human scale design for the WKT Plaza and the Intersection of Canton Road and Austin Road West

WKT Plaza intersection with WKCD / During design stage / Throughout operation phase

Design Architect / Contractor appointed by WKCDA / MTRC

EIAO-TM

Table 10.23

(MOP 9)

Night time lighting control measures such as the use of sensors and timers could help reduce usage after hours.

WKCD building exterior and open areas / During night time / Throughout operation stage

Private Developer (for land sale lots); WKCDA (for WKCD facilities)

EIAO-TM