Annexes Annex A - EPD

Outlying Islands Sewerage Stage 2 – South Lantau Sewerage Works 2888/B&V/0048/Draft H

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Annexes

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Annex A

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Outlying Islands Sewerage Stage 2 – South Lantau Sewerage Works

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Annex A Implementation Schedule of Recommended Mitigation Measures

EIA Reference

Recommended Environmental Protection Measures/ Mitigation Measures

Objectives of the recommended measures

& main concerns to address

Implementation Agent

Implementation Stage

Relevant Legislation & Guidelines

D C O

1. Water Quality

S 4.9.1 Drilling fluid required for the HDD works shall not be discharged to the sea, and the drill cutting produced shall be separated in the shaker system and divided into coarse and fine particles for on-site reuse, if suitable, or off-site disposal.

Horizontal Directional Drilling during construction

Contractor(s) -

S 4.9.1 Silt curtains shall be installed around the pilot hole exit area to prevent the suspension of sediment.

Horizontal Directional Drilling during construction

Contractor(s) -

S 4.9.1 Silt curtains shall be deployed during dredging to reduce the elevation of suspended solids to nearby sensitive receivers.

Marine Dredging/ During construction

Contractor(s) -

S 4.9.1 Closed grab dredgers should be used to reduce the potential for leakage of sediments.


Contractor(s) -

S 4.9.1 Dredged marine sediment will be disposed of in a gazetted marine disposal area in accordance with marine dumping permit conditions of the Dumping at Sea Ordinance (DASO).


Contractor(s) Dumping at Sea Ordinance (DASO)

S 4.9.1 Disposal vessels will be fitted with tight bottom seals in order to prevent leakage of material during transport.


Contractor(s) -

S 4.9.1 Barges will be filled to a level, which ensures that material does not spill over during transport to the disposal site and that adequate freeboard is maintained to ensure that the decks are not washed by wave action.


Contractor(s) -

S 4.9.1 After dredging, any excess materials will be cleaned from decks and exposed fittings before the vessel is moved from the dredging area.


Contractor(s) -


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D C O

S 4.9.1 The contractor(s) will confirm that the works cause no visible foam, oil, grease, litter or other objectionable matter to be present in the water within and adjacent to the dredging site.


Contractor(s) -

S 4.9.1 If installed, degassing systems will be used to avoid irregular cavitation within the pump.


Contractor(s) -

S 4.9.1 Monitoring and automation systems will be used to improve the crew’s information regarding the various dredging parameters to improve dredging accuracy and efficiency.


Contractor(s) -

S 4.9.1 Control and monitoring systems will be used to alert the crew to leaks or any other potential risks.


Contractor(s) -

S 4.9.1 When the dredged material has been unloaded at the disposal areas, any material that has accumulated on the deck or other exposed parts of the vessel will be removed and placed in the hold or a hopper. Under no circumstances will decks be washed clean in a way that permits material to be released overboard.


Contractor(s) -

S 4.9.1 Dredger will maintain adequate clearance between vessels and the seabed at all states of the tide and reduce operations speed to ensure that excessive turbidity is not generated by turbulence from vessel movement or propeller wash.


Contractor(s) -

S 4.9.1 Silt removal facilities such as silt traps or sedimentation facilities will be provided to remove silt particles from runoff to meet the requirements of the TM standard under the WPCO. The design of silt removal facilities will be based on the guidelines provided in ProPECC PN 1/94.

Land site & drainage/ During construction

Contractor(s) ProPECC PN 1/94 TM Standard under the WPCO

S 4.9.1 All drainage facilities and erosion and sediment control structures will be inspected on a regular basis and maintained to confirm proper and efficient operation at all times and particularly during rainstorms.

Land site & drainage/ During construction

Contractor(s) ProPECC PN 1/94 TM Standard under the WPCO


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D C O

S 4.9.1 Deposited silt and grit will be removed regularly. Land site & drainage/ During construction

Contractor(s) -

S 4.9.1 Earthworks to form the final surfaces will be followed up with surface protection and drainage works to prevent erosion caused by rainstorms.

Land site/ During construction

Contractor(s) -

S 4.9.1 Appropriate surface drainage will be designed and provided where necessary.


Contractor(s) -

S 4.9.1 The precautions to be taken at any time of year when rainstorms are likely together with the actions to be taken when a rainstorm is imminent or forecasted and actions to be taken during or after rainstorms are summarised in Appendix A2 of ProPECC PN 1/94.


Contractor(s) ProPECC PN 1/94.

S 4.9.1 Oil interceptors will be provided in the drainage system where necessary and regularly emptied to prevent the release of oil and grease into the storm water drainage system after accidental spillages.


Contractor(s) -

S 4.9.1 Temporary and permanent drainage pipes and culverts provided to facilitate runoff discharge, if any, will be adequately designed for the controlled release of storm flows.


Contractor(s) -

S 4.9.1 The temporary diverted drainage, if any, will be reinstated to the original condition when the construction work has finished or when the temporary diversion is no longer required.


Contractor(s) -

S 4.9.1 Debris and refuse generated on-site will be collected, handled and disposed of properly to avoid entering the nearby WSRs.

All facilities/ During construction

Contractor(s) -

S 4.9.1 Stockpiles of cement and other construction materials will be kept covered when not being used.


Contractor(s) -

S 4.9.1 Oil leakage or spillage will be contained and clean up immediately. Waste oil will be collected and stored for recycling or disposal, in accordance with the Waste Disposal Ordinance.


Contractor(s) Waste Disposal Ordinance


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D C O

S4.9.2 Operation of the San Shek Wan STW shall be routinely checked to ensure that the discharge standards of treated effluent are maintained and in compliance with the relevant TM-ICW under the WPCO.

During operation DSD TM-ICW under the WPCO

S4.9.2 Standby units, emergency storage units and dual power supply will be provided in the sewage pumping stations and STW to reduce the potential of unplanned events and emergency discharge of untreated sewage.

During operation DSD -

S4.9.2 For the monitoring of all unmanned sewage pumping stations / manned sewage treatment works, a remote control and monitor system connecting the sewerage plants with the DSD’s designated facilities through SCADA system is required.


S4.9.2 and S5.8

An Emergency Response Plan shall be prepared and implemented in the event of emergency discharge of untreated sewage. Relevant government departments including EPD, LCSD and DSD shall be informed by the STW operator as soon as possible of any emergency discharge of untreated sewage. Appropriate actions, e.g. closing of bathing beaches or other water sports activities, shall be outlined in the Emergency Response Plan.

During operation DSD 　 -

S4.12.1 Regular site inspections will be carried out in order to confirm that regulatory requirements are being met and that contractors are implementing the standard site practice and mitigation measures as proposed to reduce potential impacts to water quality.

During construction Environmental Team (ET) & Independent

Environmental Checker (IEC)

-

S4.12.1 A water quality monitoring programme shall be implemented for the construction phase.

Designated monitoring stations as defined in EM&A Manual/During marine construction period

ET -


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D C O

S4.12.2 A water quality monitoring programme is recommended during the initial period upon the full commissioning of the STW to monitor changes in marine water quality and to confirm that there is no deterioration in water quality due to the STW discharge.

During operation ET/ DSD 　 -

2. Ecology

S5.8 Erect fences along the boundary of the works area before the commencement of works to prevent vehicle movements and encroachment of personnel onto adjacent areas.

All area/ During construction

Contractor(s) -

S5.8 Regularly check the work site boundaries to ensure that they are not breached and that damage does not occur to surrounding areas.


Contractor(s)/ ET -

S5.8 Avoid any damage and disturbance, particularly those caused by filling and illegal dumping, to the surrounding habitats through proper management of waste disposal.


Contractor(s) -

S5.8; Annex 5B – Table A2

Reinstate temporarily affected areas, particularly the habitats of plantation and shrubland-grassland immediately after completion of construction works, through on-site tree/shrub planting. The tree/shrub species will be chosen with reference to those in the surrounding area.


Contractor(s) -

S5.8 A closed grab dredger will be used to dredge down about -11mPD which is approximately 6m below the current seabed and there will be no excessive dredging.

Marine works area/ During construction

Contractor(s) -

S5.8 Permanent building structures, works and storage areas should be avoided in the habitat of moderate or high ecological value, as well as the proximity of species of conversation interest (e.g. Aquilaria sinenis).


Contractor(s) -

S5.8 An Emergency Response Plan shall be prepared and implemented to cope with emergency discharge of untreated sewage.

All area/ During operation

DSD -


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D C O

S5.8 Woodland compensation to mitigate for the loss of mixed woodland due to the the construction of the San Shek Wan STW, San Shek Wan SPS (Proposed and Alternative Sites) and their associated roads is recommended to fully compensate the loss of mixed woodland. Establishment and after-establishment caring measures of the compensatory mixed woodland are proposed for this Project. Details for the woodland compensation, including planting species, will be developed in a woodland compensation proposal as part of the EM&A programme.

Land site/ During detailed design stage, construction and operation

DSD/ Contractor(s)/ ET

-

S5.8 Species proposed for planting are pioneer native tree and shrub species often present in natural woodlands in the Study Area.

Land site/ During detailed design stage, construction and operation

DSD/ Contractor(s)/ ET

-

S5.8 For the affected individuals of Aquilaria sinensis at San Shek Wan SPS Alternative Site and STW, transplantation plan will be developed, including an EM&A programme for monitoring the transplantation of the tree individuals.


Contractor(s) -

3. Air Quality

S7.7.1 Dust control measures stipulated in the Air Pollution Control (Construction Dust) Regulation will be implemented during the construction of the Project to control potential fugitive dust emissions.

Land site/ During Construction

Contractor(s) Air Pollution Control (Construction Dust)

S7.7.1 Regular water spraying on exposed area. Land site/ During Construction, particularly dry season

Contractor(s) -

S7.7.1 Vehicle wheel-washing and body washing facilities shall be provided at the site entrance.


Contractor(s) -

S7.7.1 Shielding or covering with impervious sheet of stockpiled materials or exposed area when it is not use to reduce dust nuisance.


Contractor(s) -

S7.7.1 Site practices such as regular maintenance and checking of the diesel-driven PMEs will be adopted to avoid any black smoke emissions and to reduce gaseous emissions.


Contractor(s) -


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D C O

S7.7.1 To minimize odour problem, the sludge tankers for disposal of sludge shall be fully enclosed.

During operation Contractor(s) -

S7.7.2 Deodorization units comprising of chemical scrubbers (for STW only) and activated carbon absorbers (for SPS and STW) will be installed in order to reduce 99.5% of odour in the exhaust.


S7.7.2 Ventilation system will be provided to ensure adequate air change within the plant.


S7.9.1 Regular site inspections will be carried out in order to confirm that the mitigation and control measures are properly implemented and are working effectively to ensure proper construction dust, gaseous emissions and odour control.


ET/ IEC -

S7.9.2 A commissioning test will be performed for the operation phase to ascertain the effectiveness of the odour control measures at the San Shek Wan STW and the proposed sewage pumping stations. Exhaust air flow rate, temperature of exhaust, odour concentrations at the outlet of the deodorizing unit should be monitored during the commissioning test.


S7.9.2 Daily monitoring of odour emission at the exhaust at STW and SPSs shall be conducted in the first three months of the first year of the operation.


S7.9.2 In order to ensure the performance of odour control measures particularly the activated carbon absorber and to facilitate maintenance during operation, two sets of odour removal system (1 for normal operation and 1 for standby) will be installed at the STW and sewage pumping stations such that during maintenance, the exhaust air of the STW and sewage pumping stations will be diverted to the standby odour removal unit and the odour removal efficiency will be maintained to be as similar as that during normal operation.



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D C O

4. Noise

S8.8.1 Good construction site practice shall be maintained. All area/ During construction

Contractor(s) -

S8.8.1 Quiet Powered Mechanical Equipment (PME) shall be used. Noise control/ During construction

Contractor(s) -

S8.8.1 Movable noise barriers shall be adopted. Noise control/ During construction

Contractor(s) A Practical Guide for the Reduction of Noise from Construction Works,

S8.8.1 Noise insulation sheet shall be used for PME. Noise control/ During construction

Contractor(s) -

S8.8.1 Scheduling of PME/construction activities: some construction activities will be operated in sequence rather than simultaneously within the respective works areas

Noise control/ During construction

Contractor(s) -

S8.8.1 Only well-maintained plant will be operated on-site and plant will be serviced regularly during the construction phase.


Contractor(s) -

S8.8.1 Silencers or mufflers on construction equipment will be utilised and will be properly maintained during the construction phase.


Contractor(s) -

S8.8.1 Mobile plant, if any, shall be sited as far away from Noise Sensitive Receivers (NSRs) as possible.


Contractor(s) -

S8.8.1 Machines and plant (such as trucks) that may be in intermittent use will be shut down between work periods or will be throttled down to a minimum.


Contractor(s) -

S8.8.1 Plant known to emit noise strongly in one direction will, wherever possible, be orientated so that the noise is directed away from the nearby NSRs.


Contractor(s) -

S8.8.1 Material stockpiles and other structures will be effectively utilised, wherever practicable, in screening noise from on-site construction activities.


Contractor(s) -


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D C O

S8.8.1 Manual working will be required to replace operation of large PMEs such as such as excavators, lorries and concrete lorry mixers when construction of village sewers carried out in narrow village alleys.


Contractor(s) -

S8.8.2 Quieter equipment shall be chosen and noise levels specification shall be included when ordering new plant items.

Noise control/ Pre-construction/ During construction

Contractor(s) -

S8.8.2 Locate fixed plant items or noise emission points away from the NSRs as far as practicable.


Contractor(s) -

S8.8.2 Locate noisy machines in completely enclosed plant rooms or buildings with suitable and practicable noise remedies.


Contractor(s) -

S8.8.2 Develop and implement a regularly scheduled plant maintenance programme so that plant items are properly operated and serviced. The programme should be implemented by properly trained personnel.


Contractor(s) -

S8.11.1 The effectiveness of on-site control measures could also be evaluated through the regular site audits.


ET/ IEC -

S8.11.2 An operational noise monitoring programme for the operation of San Shek Wan STW and SPS is recommended during the testing and commissioning stage to ensure that compliance with the noise limits specified in this report are achieved.

All facilities/ During operation

DSD -

5. Waste Management

S9.5.1 Nomination of approved personnel to be responsible for standard site practices, arrangements for collection and effective disposal to an appropriate facility of all wastes generated at the site.

Contract mobilisation/ During construction

Contractors -

S9.5.1 Training of site personnel in proper waste management and chemical handling procedures. Training will be provided to workers on the concepts of site cleanliness and appropriate waste management procedures, including waste reduction, reuse and recycling at the beginning of the construction works.


Contractors -


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D C O

S9.5.1 Provision of sufficient waste disposal points and regular collection for disposal.

All area/ During construction/ During operation

Contractors WBTC Nos.6/2002 and 6/2002A, Enhanced Specification for Site Cleanliness and Tidiness. Works Bureau, Hong Kong SAR Government

S9.5.1 Appropriate measures to reduce windblown litter and dust transportation of waste by either covering trucks or by transporting wastes in enclosed containers.



S9.5.1 Separation of chemical wastes for special handling and appropriate treatment at the Chemical Waste Treatment Centre at Tsing Yi.


Contractors Chapters 2 & 3 Code of Practice on the Packaging, Labelling & Storage of Chemical Wastes published under the Waste Disposal Ordinance (Cap 354), Section 35

S9.5.1 Regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors.


Contractors Waste Disposal Ordinance

S9.5.1 A recording system for the amount of wastes generated/ recycled and disposal sites.


Contractors ETWB TCW No. 31/2004

S9.5.2 Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of material and their proper disposal.

Land site/ During construction/ During operation

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

S9.5.2 Encourage collection of aluminium cans and waste paper by individual collectors during construction with separate labelled bins provided to segregate these wastes from other general refuse by the workforce.


Contractors ETWBTC No. 33/2002, Management of Construction and Demolition Material Including Rock

S9.5.2 Any unused chemicals and those with remaining functional capacity will be recycled as far as possible.


Contractors -

S9.5.2 Use of reusable non-timber formwork to reduce the amount of C&D materials.

All areas/ During construction

Contractors Works Branch Technical Circular (WBTC) No. 32/92, Thus Use of Tropical Hard Wood on Construction Site


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D C O

S9.5.2 Prior to disposal of construction waste, wood, steel and other metals will be separated to the extent practical, for re-use and/or recycling to reduce the quantity of waste to be disposed of to landfill.


Contractors ETWB TCW No. 31/2004

S9.5.2 Proper storage and site practices to reduce the potential for damage or contamination of construction materials.


Contractors -

S9.5.2 Plan and stock construction materials carefully to reduce amount of waste generated and avoid unnecessary generation of waste.


Contractors -

S9.5.3 A Sediment Quality Report (SQR) for sampling and chemical testing of the sediment will be prepared and submitted to the EPD for approval. The approved detailed sampling and chemical testing will be carried out prior to the commencement of the dredging activities to confirm the sediment disposal method.

Marine works/ During construction

Contractors ETWB TC(W) No. 34/2002 and Dumping at Sea Ordinance (DASO)

S9.5.3 The contractor will 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.


Contractors Waste Disposal (Charges for Disposal of Construction Waste) Regulation

S9.5.3 A trip-ticket system will be established in accordance with DEVB TC(W) No. 6/2010 to monitor the reuse of surplus excavated materials off-site and disposal of construction waste and general refuse at transfer facilities/ landfills, and to control fly-tipping.


Contractors DEVB TC(W) No. 6/2010

S9.5.3 The project proponent will also conduct regular inspection of the waste management measures implemented on site as described in the Waste Management Plan


ET/ IEC/ DSD ETWB TC(W) No. 19/2005


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D C O

S9.5.3 A recording system (similar to summary table as shown in Annex 5 and Annex 6 of Appendix G of ETWB TC(W) No. 19/2005) for the amount of waste generated, recycled and disposed of (including the disposal sites) will be established during the construction phase.


Contractors Annex 5 and Annex 6 of Appendix G of ETWB TC(W) No. 19/2005

S9.5.3 Inert C&D materials (public fill) will be reused within the Project as far as practicable.


Contractors -

S9.5.3 Public fill and construction waste shall be segregated and stored in different containers or skips to facilitate reuse or recycling of materials and their proper disposal.


Contractors -

S9.5.3 Specific areas of the work site will be designated for such segregation and storage if immediate use is not practicable.


Contractors -

S9.5.3 To reduce the potential dust and water quality impacts of site formation works, C&D materials will be wetted as quickly as possible to the extent practice after filling.


Contractors Air Pollution Control (Construction Dust) Regulation; WPCO

S9.5.3 Open stockpiles of excavated/ fill materials or construction wastes on-site should be covered with tarpaulin or similar fabric.

Land site/ During Construction, particularly dry season

Contractors Air Pollution Control (Construction Dust) Regulation

S9.5.3 Chemical waste container shall be suitable for the substance they are holding, resistant to corrosion, maintained in a good condition, and securely closed;


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


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D C O

S9.5.3 Chemical waste container shall have a capacity of less than 450 L unless the specifications have been approved by the EPD.



S9.5.3 A label in English and Chinese shall be displayed on the chemical container in accordance with instructions prescribed in Schedule 2 of the Regulations.



S9.5.3 Storage areas for chemical waste shall be clearly labelled and used solely for the storage of chemical waste.



S9.5.3 Storage areas for chemical waste shall be enclosed on at least 3 sides;



S9.5.3 Storage areas for chemical waste shall 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.




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D C O

S9.5.3 Storage areas for chemical waste shall have adequate ventilation. All area/ During construction


S9.5.3 Storage areas for chemical waste shall be covered to prevent rainfall entering (water collected within the bund must be tested and disposed of as chemical waste, if necessary).



S9.5.3 Storage areas for chemical waste shall be arranged so that incompatible materials are appropriately separated.



S9.5.3 Chemical waste will be disposed of 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.

During Construction/ During Operation


S9.5.3 General refuse will be stored in enclosed bins or compaction units separately from construction and chemical wastes.




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D C O

S9.5.3 Adequate number of waste containers will be provided to avoid over-spillage of waste.



S9.5.3 A reputable waste collector will 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.


Contractors -

S9.5.3 The burning of refuse on construction sites is prohibited by law. All area/ During construction

Contractors Air Pollution Control Ordinance

S9.5.4 Sludge will be stored properly in covered containers within the STW.

During Operation Contractors Waste Disposal Ordinance (WDO)

S9.5.4 Sludge containers should be flushed with water regularly. During Operation Contractors Waste Disposal Ordinance (WDO)

S9.5.4 Frequent sludge removal from storage containers is necessary to prevent the production of gases.

During Operation Contractors Air Pollution Control Ordinance

S9.5.4 Screens should be cleaned regularly to remove any accumulated organic debris.

During Operation Contractors Air Pollution Control Ordinance

S9.5.4 Grit and screening transfer systems should be flushed regularly with water to remove organic debris and grit.

During Operation Contractors -

S9.5.4 Screenings and grits shall be transferred and stored in closed containers.

During Operation Contractors -

S9.5.4 & S9.7.1

To facilitate monitoring and control over the contractors’ performance on waste management, a waste inspection and audit programme will be implemented throughout the construction phase.


ET/ IEC -

6. Landscape & Visual

S10.6.8 & S10.7.7

Detailed design of development components should reduce landscape footprint and visibility of structures and blend with the existing environment as far as possible. (MM1)

All area/ Detailed design/ During construction/ During operation

DSD/ Contractor(s)

-


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D C O

S10.6.8 Temporary structures and construction works should be planned with care to minimise disturbance to trees/ vegetation, topography and existing built structures. The footprint of the proposed facilities shall be compressed to a practical minimum taking into account functional, operational and maintenance needs so as to cause minimum land conversion impact. (MM1)


DSD/ Contractor(s)

-

S10.6.8 Where technically feasible design should aim to reduce the visibility of the proposed above ground structures. This will include massing and building height considerations. In addition the form, textures, finishes and colours of the proposed structures should be as compatible with the existing surroundings as possible,. Light earthy tone colours such as shades of green, shades of grey, shades of brown and off-white may be utilised where technically feasible to reduce the visibility of the new development components, including all SPSs and the STW. To further improve visual amenity, natural building materials such as stone and timber, should be preferably adopted for architectural features, where technically feasible. To date, a variety of materials are proposed for façade treatment to create a layering effect that breaks down the massing of structures. Translucent materials and louvers shall be used to enhance the permeability of the buildings. (MM1)


DSD/ Contractor(s)

-

S10.6.8 Vertical Greening and Green Roof – Provide vertical greening to soften hard surfaces, and roof greening to enhance landscape and visual quality. (MM2)


DSD/ Contractor(s)

General Specification of Civil Engineering Works – Section 3 Landscape Softworks and Establishment Works

S10.6.8 Tree Protection and Preservation – Trees/ woodland within the Project Site will be protected and preserved as far as possible in accordance with DEVB TC(W) No. 7/2015. (MM3)


DSD/ Contractor(s)

DEVB TC(W) No. 7/2015. GLTMS Guideline on Tree Preservation during Development General Specification of Civil Engineering Works – Section 3 Landscape Softworks and Establishment Works


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D C O

S10.6.8 Tree Transplantation – Should removal of trees be unavoidable due to construction impacts, trees will be transplanted or felled according to Clause 3.97 of the General Specification of Civil Engineering Works – Section 3 Landscape Softworks and Establishment Works. Transplantation must be carried out prior to site formation works and be treated with establishment works immediately after transplanting, for a period of no less than 12 months. (MM4)


DSD/ Contractor(s)

GLTMS Guideline on Tree Transplanting General Specification of Civil Engineering Works – Section 3 Landscape Softworks and Establishment Works

S10.6.8 Compensatory Tree Planting - Where loss of existing trees is unavoidable, compensatory planting of trees should be provided in accordance with DEVB TC(W) No. 7/2015 to compensate for those trees felled. Complete compensatory planting at least 3-6 months before construction completion, followed by 12 months establishment period after construction completion. (MM5)


DSD/ Contractor(s)

DEVB TC(W) No. 7/2015 General Specification of Civil Engineering Works – Section 3 Landscape Softworks and Establishment Works

S10.6.8 The selection of planting species shall be made with reference to the species identified in the Tree Survey and preferably be native to Hong Kong or the South China region. As stated in DEVB TC(W) No. 7/2015, as far as possible, implementation of compensatory planting should be of a ratio not less than 1:1 in terms of quality and quantity within the site, i.e. the total numbers and the aggregated girth size of compensatory trees within the site and off-site, should not be less than that of the tree(s) to be felled. In addition, the quality of compensatory trees should be at least of “heavy standard” and further details regarding soil specification and ground surface treatment of recipient locations of the compensatory tree will be provided in a Detailed Landscape Design and Planting Plan which should detail the location of compensatory planting. (MM5)


DSD/ Contractor(s)

DEVB TC(W) No. 7/2015 General Specification of Civil Engineering Works – Section 3 Landscape Softworks and Establishment Works

S10.6.8 Buffer Planting – Tall screen/buffer trees and shrubs shall be planted to screen the proposed built structures. This measure may additionally form part of the compensatory planting (MM5) and will improve compatibility with the surrounding environment. (MM6)


DSD/ Contractor(s)

General Specification of Civil Engineering Works – Section 3 Landscape Softworks and Establishment Works


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D C O

S10.6.8 Topsoil reuse – Excavated topsoil should be stripped and stored for re-use in the construction of the soft landscape works of this Project or other projects. This is considered a general measure for good site practice. (MM7)


DSD/ Contractor(s)

-

S10.6.8 Light Control – Control of night time lighting glare shall be implemented to minimize glare impact to adjacent VSRs during construction, and operation as necessary. (MM8)


DSD/ Contractor(s)

-

7. Cultural Heritage

S11.6.1 & 11.8.1

Refinement of the proposed alignment adjacent to historic landscape feature TF-HL-1 is recommended to avoid the direct impact.

Built heritage/ Detailed design

Contractor(s) -

S11.6.1 & 11.8.1

For the remaining built heritage potentially impacted, prior to commencement of the construction works, a baseline condition survey and baseline vibration impact assessment should be conducted by a qualified building surveyor and a qualified structural engineer to define the vibration limit and to evaluate if construction vibration monitoring and structural strengthening measures are required during construction phase to ensure the construction performance meets with the vibration and settlement monitoring criteria to be agreed with AMO. A maximum level of 5mm/s for Grade 1, 7.5 mm/s for Grade 2 and 3 Historic Building and 15mm/s for Nil Grade heritage structures should be adopted. For settlement limits, an Alert/ Alarm/ Action level of 6mm/ 8mm/ 10mm should be followed. Baseline condition survey and vibration impact assessment of Graded and Proposed Graded Building should be submitted to AMO for comment before commencement of construction works.

Built heritage/ Detailed design

Contractor(s)


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D C O

S11.6.1 & 11.8.1

During the construction period, no mechanical equipment, such as excavator, shall be operated within 20m from the identified built heritage and only handheld tools and handheld electric driven equipment shall be used. All construction tools, construction materials, excavated materials or any materials generated from the works under this project shall keep clear of the built heritage structures.

Built heritage/ During construction

Contractor(s) -

S11.6.1 & 11.8.1

Safe public access, buffer zones and protective covering should be provided to the built heritage during and after the proposed works. If construction works will be conducted within 1m from the walls/structures, of the built heritage, proper protection measure such as fencing and cover-up of nylon/ plastic sheets for the walls/structures of the built heritage shall be carried out.

Built heritage/ During construction/ During operation

Contractor(s) -

S11.6.2 & 11.8.2

A Communication Plan to communicate event of discovery of antiquities or supposed antiquities to the Antiquities and Monuments Office (AMO) should be prepared by the contractor before the commencement of construction works. The plan shall be approved by the engineer, and circulated among relevant parties. A document presenting the plan should be posted in site office(s) for reference.


Contractor(s) Antiquities and Monuments Ordinance

S11.6.2 & 11.8.2

All site staffs, including workers, who will be responsible for the excavation works within Sites of Archaeological Interest should be formally briefed with the Communication Plan and understands that they are working within Sites of Archaeological Interest.


Contractor(s)/ Qualified

Archaeologist

-

S11.6.2 & 11.8.2

A Survey-cum-Rescue Excavation Proposal to define the scope of work shall be prepared and agree it with the AMO. Survey-cum-excavation shall be conducted before the commencement of the excavation work of the concerned sewer alignment by a qualified archaeologist. A Survey-cum-Rescue Excavation Report shall be prepared upon completion of the archaeological works.



Archaeologist

Guidelines for Handling of Archaeological Finds and Archives (As at 28 November 2011); Guidelines for Archaeological Reports


EM&A Manual

20 B&V / ERM

EIA Reference







D C O

S11.6.2 & 11.8.2

A License to Excavate and Search for Antiquities shall be obtained from the Authority under the AM Ordinance (Cap. 53) by the qualified Archaeologist for the required fieldworks of the archaeological works.



Archaeologist

Antiquities and Monuments Ordinance

S11.6.2 & 11.8.2

If the project boundary changes in later stage of the Project to cover additional area not covered in the EIA, the need for further archaeological survey and subsequent impact assessment should be reviewed and AMO should be consulted.

All area/ During construction/ During operation

Contractor(s) -

Annexes Annex A - EPD

Documents

Transcript of Annexes Annex A - EPD