SALE OF SITE FOR RESIDENTIAL DEVELOPMENT LAND PARCEL AT WOODLEIGH LANE
CONDITIONS AND REQUIREMENTS OF RELEVANT COMPETENT AUTHORITIES AND PUBLIC UTILITY LICENSEES (FOR INFORMATION OF TENDERERS)
CONTENTS PAGE
1.0 DEFINITION 2
2.0 GENERAL CONDITIONS AND REQUIREMENTS 2 - 3
3.0 PUBLIC UTILITIES BOARD (PUB) 4 - 10 [ A ] DRAINAGE [ B ] SEWERAGE [ C ] WATER
4.0 ELECTRICITY 11 - 12
5.0 TELECOMMUNICATIONS 12 - 13
6.0 GAS 13
7.0 LAND TRANSPORT AUTHORITY (LTA) 14 - 19
8.0 NATIONAL PARKS BOARD (NParks) 19 - 20
9.0 NATIONAL ENVIRONMENT AGENCY (NEA) 20 - 22
10.0 BUILDING AND CONSTRUCTION AUTHORITY (BCA) 22 - 23
11.0 OTHER INFORMATION 23
ANNEX A 24
ANNEX A - 1 25
ANNEX A - 2 26
ANNEX B 27 - 28
ANNEX C 29 - 32
ANNEX D 33 - 35
ANNEX E 36 - 37
SALE OF SITE FOR RESIDENTIAL DEVELOPMENT LAND PARCEL AT WOODLEIGH LANE
CONDITIONS AND REQUIREMENTS OF RELEVANT COMPETENT AUTHORITIES AND PUBLIC UTILITY LICENSEES (FOR INFORMATION OF TENDERERS)
1.0 DEFINITION
1.1 The Urban Redevelopment Authority (“the Authority”), acting as agent for and on behalf of the Government of the Republic of Singapore (“the Government”), is inviting offers for lease by tender for the Land Parcel at Woodleigh Lane (“the Land Parcel”). The lease of the Land Parcel is subject to the Technical Conditions of Tender and the Conditions of Tender for the Land Parcel contained in the Developer's Packet. Where the context so admits, the expression "the Authority" herein shall include the Government.
2.0 GENERAL CONDITIONS AND REQUIREMENTS
2.1 The successful tenderer for the Land Parcel is required under the said Conditions of Tender to ascertain the exact and detailed conditions and requirements of all relevant Competent Authorities and Public Utility Licensees in respect of the proposed development thereon and shall at his own cost and expense observe and comply with the same.
2.2 Without affecting the generality of paragraph 2.1 above and without prejudice to the obligations of the successful tenderer as set out therein, the contents herein are provided for the information of the tenderers only. Whilst every care and attention has been taken in the compilation and preparation hereof, the Authority does not warrant that the contents herein represent all the conditions and requirements of the relevant Competent Authorities and Public Utility Licensees in respect of the proposed development on the Land Parcel or that they are free from errors or omissions whatsoever. The contents herein are subject to changes by the relevant Competent Authorities and Public Utility Licensees concerned.
2.3 A summary of the initial services requirements of the relevant Competent Authorities and Public Utility Licensees is set out herein. It serves only as an indication of the possible work involved with regards to services, and is by no means exhaustive or final.
2.4 The successful tenderer shall ensure that the following requirements are complied with:
2.4.1 to consult and liaise directly with the relevant Competent Authorities and Public Utility Licensees regarding the actual locations of all service mains within the Land Parcel and on the requirements and conditions for 2 services diversion, if any, and provision prior to the commencement of site work. All necessary precautions shall be taken by the successful tenderer to safeguard the service mains before they are diverted.
2.4.2 to engage his own licensed Cable Detection Worker and licensed Telecommunication Cable Detection Worker to carry out cable detection and if necessary to carry out trial trenches to locate any manholes and cable routes prior to the commencement of site work. The successful tenderer shall bear the cost of any diversion work.
2.4.3 to ensure that all service mains that do not need to be diverted are identified and provided with protection, if necessary, during the construction stage of the proposed development. The cost of repairs to any damaged service mains as a result of work carried out by the successful tenderer shall be borne by the successful tenderer.
2.4.4 to ensure that the relevant Competent Authorities and Public Utility Licensees are allowed free and unconditional access at all times to services that remain within the Land Parcel for the purposes of installation, maintenance, repair and improvement works and all other work and activities incidental thereto.
2.4.5 to make his own arrangements with the relevant Competent Authorities and Public Utility Licensees and pay for the fees and costs of any diversion and/ or "capping off" of existing services, provision of service mains and service connection, if any, in relation with the proposed development.
2.4.6 to provide for all the internal distribution for water, electricity, drainage and sanitary discharge for the proposed development.
2.4.7 to liaise with all the relevant Competent Authorities and Public Utility Licensees on upgrading the road reserves abutting the Land Parcel to ensure that the necessary roadside drains, sidetable, kerb, etc are carried out in accordance with the prevailing Road Reserve requirements.
2.5 The successful tenderer shall be responsible to carry out, at his own cost and expense, his own site investigation to verify whether there is any sub-structure or other obstructions e.g. footings, piles, tree roots, etc, in the ground of the Land Parcel, and ascertain their effect on the proposed development.
2.6 There may be some other existing services affected by the proposed development. The successful tenderer shall inform the relevant Competent Authorities and Public Utility Licensees immediately and bear the necessary cost of diversion and/or "capping off" of these existing services, if any.
2.7 In general, no structure shall be sited close to or over existing and proposed services. The successful tenderer shall comply with all requirements as stipulated by the relevant Competent Authorities and Public Utility Licensees.
3 3.0 PUBLIC UTILITIES BOARD (PUB)
(A) DRAINAGE
3.1 General
3.1.1 The planning, design, construction activities and procedures for plan submission shall fully comply with the requirements as stipulated in the prevailing Code of Practice on Surface Water Drainage and the Sewerage and Drainage (Surface Water Drainage) Regulations 2007 and any subsequent addendum to the Code of Practice. The Code of Practice can be downloaded from the Public Utilities Board (PUB) website at http://www.pub.gov.sg/Documents/COP Final.pdf
3.1.2 In complying with the minimum platform level (MPL) requirement, the successful tenderer shall ensure that the surface runoff within, upstream of and adjacent to the proposed development can be effectively drained away without causing flooding within the Land Parcel and in the vicinity of the Land Parcel.
3.1.3 The development schedule of the Land Parcel shall be properly considered to avoid a situation where the Land Parcel and/ or lands in the vicinity become 'land locked' without proper drainage outlets.
3.1.4 Any Drainage Reserve within the Land Parcel shall be safeguarded. In addition, the successful tenderer shall also ensure that all other existing drains and watercourses within and in the vicinity of the Land Parcel are likewise safeguarded. All existing drains within the Land Parcel shall not be altered/ interfered with without prior approval of the PUB.
3.1.5 If a proposed roadside drain cannot be fully accommodated within the Road Reserve, the width of the additional Drainage Reserve measured from the Road Reserve Line shall include maintenance access with a width as stipulated and shown in Appendix 1 of the prevailing Code of Practice on Surface Water Drainage.
3.1.6 The successful tenderer may reconstruct the existing open drains on the Land Parcel as closed drains of sizes as determined by Catchment and Waterways Department of the PUB. The width of the Drainage Reserve safeguarded for open drains may be reduced in accordance with the Drainage Reserve Requirements for closed drains as shown under Appendix 1 of the prevailing Code of Practice on Surface Water Drainage.
3.1.7 Drains/ Drainage Reserves that are cutting across the Land Parcel may be diverted to optimise land use on condition that the proposed diversion is technically and physically feasible and acceptable to Catchment and Waterways Department of the PUB. The drains shall be built by the successful tenderer to the drain sizes as determined by PUB. Any proposal to alter/ divert the drains shall be submitted to the PUB for approval. 4
3.1.8 The Land Parcel may be affected by common drains and other smaller drains which serve the Land Parcel and areas outside the Land Parcel. Surface runoff from the Land Parcel and all neighbouring lands must be allowed to discharge through the drains within the Land Parcel. Any proposal to alter, disturb, fill, block, interfere or divert these drains shall be submitted to the PUB for approval. Should the successful tenderer intend to make use of these common drains within the Land Parcel for further runoff from its Land Parcel such that the drain width needs to be increased, then a Drainage Reserve shall be imposed accordingly and this Drainage Reserve shall be required to be vested to the State unless otherwise advised by the PUB. The successful tenderer shall also be responsible for the maintenance (structural and cleansing) of smaller drains (without drainage reserve) that are flowing through the Land Parcel.
3.1.9 The existing drainage system within and in the vicinity of the Land Parcel shall be upgraded/ improved to cater for increased runoff from the proposed development. In addition, new drains, depending on the type and nature of the proposed development, may be built within the Land Parcel. Appropriate Drainage Reserves shall be set aside for drains in accordance with the prevailing Code of Practice on Surface Water Drainage.
3.1.10 The successful tenderer must incorporate safeguards in his design of the proposed development and also take all necessary precautions to ensure that the works/ construction activities at the Land Parcel will not cause any damage to, affect the structural integrity of, or cause any geotechnical distress or impact on the existing drains/ culverts/ canals.
3.1.11 The successful tenderer shall engage a Qualified Person [(QP), as defined under the Sewerage and Drainage Act] to submit comprehensive drainage plans, including any proposal to level/ backfill the Land Parcel, to the PUB for comments and approval.
3.1.12 Effective erosion and sediment control measures shall be provided by the successful tenderer and the QP shall advise his developer/ owner to provide such effective measures and facilities with inputs from Qualified Erosion Control Professional (QECP) (including site management system and perimeter cut-off drain, silt traps, storage ponds, treatment plants, etc.) to ensure clean discharge that complies with the statutory requirement. The proposed erosion and sediment measures shall be submitted by a Qualified Erosion Control Professional to PUB for approval before commencement of works. All affected watercourses shall be desilted and cleared until completion of work. For reference, the information can be found in the PUB website at www.pub.gov.sg/drainage/earthcontrolmeasures .
3.1.13 If the Land Parcel is within a water catchment area and earth filling work is required at the development site, no marine sand shall be used. Only washed sand with chloride content not exceeding 0.01% (by Weight) 5 shall be allowed. Test reports on the chloride content of the washed sand shall be submitted to Catchment & Waterways Department, PUB for records before commencement of work.
3.1.14 PUB has in 2006 launched the Active, Beautiful and Clean (ABC) Waters Programme. As part of the Programme, PUB has launched ABC Waters design guidelines which provide ideas on how natural runoff treatment systems termed ABC Waters design features such as rain gardens, vegetated swales and bioretention swales can be integrated within a development. These features detain/ slow down stormwater runoff and improve water quality by using plants and soil. They also enhance the landscape and biodiversity of the development. Specific information on the design of these features can be found at the website https://www.pub.gov.sg/abcwaters/designguidelines.
PUB encourages the implementation of ABC Waters design features in the development. If applicable, the design and construction supervision of ABC Waters design features as well as drawing up the maintenance plan for these features shall be carried out by an ABC Waters Professional.
3.1.15 Developments greater than or equal to 0.2 hectares in size are required to control the peak runoff discharged from the development sites. The maximum allowable peak runoff to be discharged to the public drains will be calculated based on a runoff coefficient of 0.55, and for design storms with a return period of 10 years and for various storm durations of up to 4 hours (inclusive). Peak runoff reduction can be achieved through the implementation of ABC Waters design features and structural detention and retention features, such as:
• Detention tanks; • Retention/sedimentation ponds; • Wetlands; • Green roofs; • Planter boxes; • Bioretention swales; • Porous pavements; • Bioretention basins or rain gardens, etc.
The Qualified Person shall be required to submit details (calculations and/or hydraulic model results) showing how the proposed system meets the required peak runoff rates. Due consideration shall be given to meeting ABC Waters stormwater quality objectives, which will often require treatment of stormwater runoff using ABC Waters design features. For design guidance on the ABC Waters design features, developer/QPs can refer to the ABC Waters Guidelines and relevant chapters in the Engineering Procedures, available on the PUB website.
3.2 Particular Requirements
3.2.1 Based on information given by the PUB, the minimum platform level (MPL) for the proposed residential development with basement shall be 6 1000 mm above the adjacent road/ ground levels, or any other levels as determined by PUB in Clause 2.1 of the latest Code of Practice on Surface Water Drainage (COP), whichever is the highest.
3.2.2 The successful tenderer shall submit details of the drainage design such as longitudinal sections showing proposed top and invert levels of drain, proposed gradient, proposed ground levels, structural design, etc endorsed by Professional Engineer (PE) to PUB for comments and clearance.
3.2.3 The Land Parcel is within the Marina Water Catchment Area. Pollution Control measures shall be adopted during the construction and occupation of the Land Parcel. All sewage and sullage water shall be discharged into public sewers.
(B) SEWERAGE
3.3 General
3.3.1 The planning, design and construction and plan submission for sewerage works shall comply fully with the provisions of the Sewerage and Drainage Act, the Sewerage and Drainage (Sanitary Works) Regulations, the requirements as stipulated in the prevailing Code of Practice on Sewerage and Sanitary Works and all other sewerage requirements that may be stipulated from time to time by the Public Utilities Board (PUB).
3.3.2 The successful tenderer shall establish the actual locations and depths of all the sewerage system or sanitary facilities that may be present on the Land Parcel by trial holes or other means. No building or structures shall be erected over or across the public sewers/ pumping mains that are present within the Land Parcel. If there is a need to carry out works or activities near public sewers or the pumping mains, the minimum lateral distance required is as stipulated in the prevailing Code of Practice on Sewerage and Sanitary Works.
3.3.3 A thorough site investigation of the development site shall be carried out to determine the exact positions and levels of the existing public sewers prior to the commencement of any works. All practical measures shall be taken to protect the public sewers from damage during construction works. The successful tenderer shall comply with PUB’s general requirements for protection of the existing sewers, pumping mains and DTSS tunnels & structures. The proposals to protect the public sewers/ pumping mains shall be submitted to Water Reclamation (Network) Department of the PUB for approval before the works can be carried out.
7 3.3.4 The successful tenderer is to consult Water Reclamation (Network) Department on any proposed works in the vicinity of the existing sewerage system i.e. within the excavation/ piling works’ influence zone or a corridor of 25 m / 36 m (DTSS tunnel & facilities) from works to be carried out. The guidelines on "Prevention of Damage to the Sewerage System" can be found in the PUB website at https://www.pub.gov.sg/Documents/WRN_AdvisoryNotes.pdf. Before the commencement of works, the developer/contractor is required to submit a notification for the commencement of works to the Network Management Branch (NMB) at least 7 days before the commencement of any excavation works near any sewers or sewerage system.
3.3.5 Any proposal to divert the existing public sewers / pumping mains or to raise or lower any existing manholes shall be submitted to Building Plan Unit (BPU/PUB) or the Water Reclamation (Network) Department (WRN/PUB) for approval. The works to divert the public sewers/ pumping mains or to raise/ lower manholes shall be carried out by the successful tenderer at his own cost and expense. All existing lateral connections shall not be affected by the proposed diversion works.
3.3.6 For proposed roads crossing existing/ proposed sewers or pumping mains, the successful tenderer is to ensure that adequate protection measures are provided to the affected existing/ proposed sewers/ pumping mains so as to ensure that they are able to withstand the loadings from the construction activities and necessary vehicular loadings.
3.3.7 The successful tenderer shall engage a Qualified Person (as defined under the Sewerage and Drainage Act) to submit proposal and detailed plans including the proposed sewerage system for the development to the Building Plan Unit (BPU/PUB) for approval and obtaining the clearance certificate.
3.4 Particular Requirements
3.4.1 Based on information given by the Water Reclamation (Network) Department of the PUB and as shown indicatively in the Sewerage Information Plan, Annex A-1, there are existing 152 mm, 225 mm and 229 mm diameter sewer, existing drainlines and proposed 400 mm diameter sewer within / in the vicinity of the Land Parcel.
3.4.2 The proposed 400 mm diameter sewer is currently being constructed by the PUB. The sewer works are expected to be completed by end 2017, barring any unforeseen circumstances.
3.4.3 The existing sewers and drainlines within the Land Parcel shall not be abandoned/removed without prior CCTV inspection and site investigation confirming that there are no more lateral connections still made to them. Details of the abandonment/removal works shall be 8 submitted to PUB for approval before commencement of works. The successful tenderer shall also comply with “The Standard Requirements for Sealing of Sewer Connection, Abandoned Sewers, Manholes and Pumping Mains” as shown in Annex A-1a.
3.4.4 The sewer connection for the proposed development shall be made to the existing 225 mm diameter sewer along Woodleigh Lane; as shown in Annex A-1.
3.4.5 The successful tenderer shall submit detailed sewer plan showing the alignment and gradient, etc to WRN/ PUB for approval before making DC submission to Building Plan Unit (BPU), PUB through the Corenet system prior to commencement of work for the proposed sewer diversion and connection. Proposed sewers/ private sanitary drainlines diversion is to pick up the flow from all affected premises and shall be shown in the detailed plan
3.4.6 The successful tenderer is to comply with PUB’s technical requirements and to seek approval / consent from all relevant Competent Authorities / affected land owners (such as the HDB, LTA, NParks and the Singapore Land Authority (SLA), private owners etc.) for the proposed works to be carried out beyond the development site.
( C ) WATER
3.5 General
3.5.1 The successful tenderer shall liaise with the Water Supply (Network) Department of the Public Utilities Board (PUB) on the requirements for water supply and NEWater to the Land Parcel.
3.6 Particular Requirement
3.6.1 Based on information given by the Water Supply (Network) Department, there are existing diameters 150 mm, 700 mm and 800 mm watermains along the northern boundary of the Land Parcel as shown in Annex A-2.
3.6.2 The watermains as mentioned in clause 3.6.1 are not to be diverted. The successful tenderer shall at his own cost and expense, ensure and undertake to comply with the following requirements for any works over/adjacent to the existing watermains:-
i. Consult PUB, Water Supply (Network) Department prior to any construction work in the vicinity of the potable watermains and appurtenances respectively.
ii. As positions of watermains as shown in the Annex A-2 are approximate only, the successful tenderer is to establish the exact alignments and depths of the watermains on site by means of trial 9 holes before commencement of any work. The position and alignment of the watermains shall be indicated onto a survey plan, Permanent markers subject to PUB’s approval are to be placed on site over the verified location of the watermains to indicate its location. The successful tenderer will need to inform the MCST taking over the development on the above requirement.
iii. No structure, either permanent or temporary, may be erected over or within one metre from the watermains. The buried watermains requires a minimum cover of one metre and the successful tenderer shall provide adequate protection for the watermains.
iv. All services, if any, must under-cross the watermains. Services undercrossing the watermains will need to be protected throughout the entire width of the undercrossing section and a minimum clearance of one metre must be provided.
v. All necessary care and precautions must be taken to safeguard and to avoid damage to the watermains and appurtenances. The cost of repairs to any watermains damaged as a result of work carried out is to be borne by the party who caused the damage. The party will also be billed for the estimated quantities of water lost from the damaged main. The party that causes the damage may also be liable for legal action. The successful tenderer shall indemnify PUB against all losses and claims arising from damage to the watermains during the course of the development work up till the date of Certificate of Satisfactory Completion (CSC) for the development is obtained or when MCST takes over whichever is the later. PUB will not be held responsible for any damage or injury caused to any persons, property, road, etc as a result of main burst during this period.
vi. A copy of the “Prevention of Damage to PUB Watemains”, which provides the details on the protection and submission requirements for applications by the successful tenderer’s professional Engineer (PE) to seek PUB's approval for proposed works carried out in the vicinity of the watermains is as shown in Annex C for compliance. vii. All watermains and appurtenances shall not be covered and must be accessible for maintenance and repairs works at all times. All watermains within the Land parcel should be clearly demarcated. The successful tenderer shall allow unimpeded access at all times for PUB officers or agents (together with any heavy machinery) to enter upon the pipeline route within the Land Parcel to inspect or excavate the ground for maintenance and repair of the watermains. In the event that reinstatement is required, PUB shall reinstate the affected areas only, including the subsoil / base course and will not be responsible for special surface, pavement, landscaping, etc. Such furnishing and landscaping shall be reinstated by the successful tenderer. 10
viii. An adequately sized drainage system in the vicinity of the watermains shall be provided to allow for access water to be channelled to nearby external drains in the event of a leak.
3.6.3 There is a fire hydrant along the northern boundary of the Land Parcel, the successful tenderer is to liaise with PUB on the relocation of the fire hydrant prior to commencement of works, at his own cost and expense. PUB will require a lead time of at least 3 months upon receipt of full payment for the relocation works to be completed subject to availability of manpower and resources of PUB’s term contractor.
4.0 ELECTRICITY
4.1 General
4.1.1 The successful tenderer shall liaise with the Transmission Licensee authorised under the Electricity Act for the electricity supply and any other electrical provisions required for the purpose of and in connection with the proposed development.
4.1.2 The successful tenderer shall purchase cable plans from SP PowerGrid and engage a Licensed Cable Detection Worker to carry out detection for any underground electricity cables within the Land Parcel. For more information on the protection and diversion to the underground electricity cables, the successful tenderer can refer to www.spgroup.com.sg/what- we-de/electricity-and-gas under the heading “Earthworks”.
4.2 Particular Requirements
4.2.1 The successful tenderer shall provide electrical substation(s) within the Land Parcel. The electrical substation(s) shall meet the technical requirements specified by the Transmissions Licensee.
Existing EHV 230kV Cables within the Land Parcel
4.2.2 Based on the information provided by SP PowerGrid Ltd (SPPG), there are existing EHV 230kV electrical cables within / in the vicinity of the eastern boundary of the Land Parcel.
4.2.3 The successful tenderer can have the options to retain the existing EHV 230kV electrical cables in its original alignment or liaise with SPPG to divert the EHV 230kV electrical cables to Upper Serangoon Road. The successful tenderer is to liaise with SPPG on the diversion of EHV 230kV electrical cables prior to commencement of works at his own cost and expense. SPPG has estimated a timeline of 24 months for the diversion work upon full payment by the successful tenderer and approval from the relevant Competent Authorities. The estimated duration is based on the assumption that SPPG’s works can be carried out and completed as scheduled without any complication or delay. 11
4.2.4 The successful tenderer shall engage a Licensed Cable Detection Worker (LCDW) to carry out underground cable detection work to locate the actual location of these existing cables. The successful tenderer shall comply with requirements as stated in Annex D when working in the vicinity of SP PowerAssets EHV 230kV cables and accessories.
Existing 22kV and LV Cables within the Land Parcel
4.2.5 Based on information given by SP PowerGrid (SPPG), there are existing live 22kV & LV cables within/ in the vicinity of eastern boundary of the Land Parcel. The successful tenderer is to liaise with SPPG on the diversion of these electrical cables prior to commencement of works at his own cost and expense. SPPG has estimated a timeline of 4 months for the diversion work upon full payment by the successful tenderer and approval from the relevant Competent Authorities. The estimated duration is based on the assumption that SPPG’s works can be carried out and completed as scheduled without any complication or delay.
Abandoned LV and HT Cables within the Land Parcel
4.2.6 There are abandoned LV & HT cables within/ near to the Land Parcel. The successful tenderer shall at his own cost and expense, engage a Licensed Cable Detection Worker (LCDW) to carry out underground cable detection work to locate the abandoned cables prior to commencement of work.
4.2.7 If there is any other live cable detected, the successful tenderer shall at his own cost and expense, liaise with SPPG for the diversion/ removal of these cables prior to commencement of works.
5.0 TELECOMMUNICATIONS
5.1 General
5.1.1 The successful tenderer shall liaise with the Telecommunication System Licensee authorised under the Telecommunication Act, for the telecommunication supply to the proposed development.
5.1.2 The successful tenderer shall provide all facilities for telecommunication services, such as MDF room, Telecom riser ducts, lead-in pipes and manholes etc, within the Land Parcel. All Telecom facilities shall be provided according to the prevailing Info- communication Development Authority of Singapore (IDA) Code of Practice for Info-communications Facilities in Buildings.
5.1.3 The successful tenderer is advised to consult the relevant Telecommunication System Licensees (e.g. Singapore Telecommunications Ltd, StarHub Ltd, StarHub Cable Vision Ltd, SP 12 Telecommunications Pte Ltd, etc) early during the planning stage of the proposed development, on the location and diversion of existing Telecoms services.
5.1.4 The detailed Telecoms facilities plans for the proposed development shall be submitted to and duly verified by Telecommunication Facility Co- ordination Committee (TFCC) through the CORENET e-submission system, and approved by the IDA prior to the commencement of works.
5.2 Particular Requirements
5.2.1 Based on information given by Singapore Telecommunications Ltd (Singtel), StarHub Ltd and Superloop Singapore Pte Ltd there are existing manholes and cables within / in the proximity to the Land Parcel and along Woodleigh Lane and Upper Serangoon Road.
5.2.2 The successful tenderer shall at his own cost and expense, liaise with these telecommunication system licensee as mentioned in Clause 5.2.1 to carry out the diversion or removal of existing manholes and cables prior to commencement of works.
5.2.3 Singtel, StarHub and Superloop have estimated a minimum lead time of 7 months for the diversion work upon full payment by the successful tenderer and approval is obtained from the relevant Competent Authorities. The estimated duration is based on the assumption that the works can be carried out and completed as scheduled without any complication or delay.
6.0 GAS
6.1 General
6.1.1 The successful tenderer shall liaise with Citygas Pte Ltd on the requirements for gas supply to the Land Parcel.
6.2 Particular Requirements
6.2.1 Based on information given by PowerGas Ltd, there are existing 150 mm and 300 mm diameter gas main along Upper Serangoon Road as well as existing 100 mm diameter gas mains within the Land Parcel.
6.2.2 The successful tenderer shall, at his own cost and expense, liaise with PowerGas Ltd for the diversion of the 100 mm diameter gas main to Upper Serangoon Road. PowerGas Ltd have estimated a minimum lead time of 6 months for the diversion work upon full payment by the successful tenderer and approval is obtained from the relevant Competent Authorities. The estimated duration is based on the assumption that the works can be carried out and completed as scheduled without any complication or delay.
13 7.0 LAND TRANSPORT AUTHORITY (LTA)
7.1 General
7.1.1 The successful tenderer shall locate the service areas, electrical substation(s), refuse bin centre and storage lane within the Land Parcel. Access to these service areas, if required, shall be taken via the ingress/ egress point of the proposed development as shown on the Control Plan, subject to the requirements and approval of the relevant Competent Authorities.
7.2 Particular Requirements
Road Improvement Works
7.2.1 In addition to Condition 5.0 of the Technical Conditions of Tender, the successful tenderer shall at his own cost and expense be responsible for any other improvement works where necessary and as required by LTA.
7.2.2 The internal layout shall be designed such that the entrance drop barriers and guard post are located within the development to provide sufficient vehicle queue length to prevent it from spilling onto the public roads.
7.2.3 All proposed street Works, as well as proposed engineering / construction works within the road reserve shall be prepared / designed, submitted, supervised and constructed in accordance with Street Works (Private Street Works) Regulations, Street Works (Public Street Works) Regulations and the following prevailing standards and code of practice:
a. Code of Practice for Street Works Proposals relating to Development works; b. LTA Standard Details of Road Elements; c. Materials & Workmanship Specifications for Civil & Structural Works; d. Code of Practice for Road Opening Works; e. Code of Practice for Traffic Control at Work Zone; f. Architectural Design Criteria; and g. Civil Design Criteria.
7.2.4 The technical details, extent and completion date of such works as stated in Conditions 7.2.1 to 7.2.3 shall comply with the requirements of the LTA and other relevant Competent Authorities in relation thereto.
Car and Motorcycle Parking lots
7.2.5 The successful tenderer shall provide car parks for the proposed development in accordance with the requirements of the prevailing Parking Places (Provision of Parking Places and Parking Spaces) Rules which include the Range-Based Car Parking Standard (RCPS) where car parking provision can be reduced up to 20% for developments within a 400 m radius of MRT/LRT stations. 14
7.2.6 Car park provision for this site will be reduced in view of its proximity to the Woodleigh MRT Station. The successful tenderer is required to apply to LTA for a 20% reduction under the prevailing Parking Places (Provision of Parking Places and Parking Spaces) Rules for the residential component.
7.2.7 The successful tenderer is strongly encouraged to provide motorcycle parking lots within the car park.
Bicycle Parking lots
7.2.8 To facilitate cycling as a mode of transportation to major transport nodes and key amenities, the successful tenderer is required to construct and provide bicycle parking(s) to accommodate a minimum number of bicycle parking lots within the Land Parcel at the rate of 1 lot for every 6 dwelling units or prevailing requirements set out by the relevant Competent Authority at the formal submission stage.
7.2.9 The successful tenderer is encouraged to provide sheltered bicycle parking(s). The bicycle parking lots should be located at spaces which are visible, well-organized and convenient for use by cyclists taking into consideration the locations of cycling paths.
7.2.10 The successful tenderer may propose more than one bicycle parking location within the Land Parcel. Consideration should be given to whether the bicycle parking spaces are intended for short term or long stay parking. The location of the bicycle parking facilities shall be easily accessible and shall not be scattered throughout the development in an ad-hoc manner.
7.2.11 As good practice, developers should set aside 10% of the total bicycle parking spaces on the ground floor where it is freely accessible and visible to visitors visiting the residential development.
7.2.12 The successful tenderer should consider existing vehicle and pedestrian movement when locating bicycle parking spaces. It is advantageous to provide a separate movement for cyclists to avoid conflicts between cyclists and other road users. Ideally, the bicycle parking spaces shall be segregated from pedestrian walkways, driveways and car park access to ensure safety of motorists, pedestrians and cyclists.
7.2.13 To ensure bicycle parks are safe and secure, these spaces should be well lit with sufficient active and passive surveillance i.e. CCTV, passerby along bicycle parking facilities etc.
7.2.14 Adequate signage should be provided to guide cyclists moving about the development. Signage should be well positioned, visible and consist of a system of signs and graphics to provide cyclists with directional information provided at development entrances.
15 7.2.15 The bicycle parking lots can be either single-tier stands or double-tier stands as illustrated in Annex B. The bicycle parking lots shall be securely anchored and non-removable. The successful tenderer can however propose alternative layouts and designs for LTA’s consideration and approval.
7.2.16 Bicycle parking area(s) proposed based on dimensions illustrated in Annex B can be considered for GFA exemption. Any provision above the minimum requirement will be subject to evaluation. The bicycle parking area(s), once approved, will not be allowed to be converted for other uses without the approval of the Authority and relevant Competent Authorities.
7.2.17 The successful tenderer is encouraged to provide complementary facilities such as showers, lockers and changing rooms in close proximity to the bicycle parking facilities where appropriate. These complementary facilities shall be computed as GFA.
7.2.18 The successful tenderer shall obtain clearance from the Competent Authority on all matters related to the bicycle parking facilities before commencing the construction of the bicycle parking lots.
7.2.19 The successful tenderer shall be responsible for the operation and maintenance of the bicycle parking lots at all times and shall bear all the costs related to the proper functioning of the bicycle parking lots.
Traffic Impact Assessment
7.2.20 The successful tenderer shall at his own cost and expense, carry out a localised Traffic Impact Assessment (TIA) study and submit it to LTA for approval. The traffic movements and the need of signalized crossing are to be studied in the TIA. The purpose of the TIA is to identify the traffic impact of the development on the surrounding transport network and to recommend necessary measures to mitigate the potential negative impact.
7.2.21 The scope and details of the TIA are to be determined in consultation with LTA prior to the Development Control submission stage. The TIA shall take into account future developments in the area. The successful tenderer shall, at his own cost and expense, be responsible for the necessary localised road improvement works in the immediate vicinity of the Land Parcel, if recommended by the TIA study.
Vehicle Access Arrangement
7.2.22 In addition to Condition 4.7.1 to 4.7.7 of the “Technical Conditions of Tender” vehicular access shall be taken from Woodleigh Lane. The access shall be located at least 50 m from the nearest junction. The access shall be 30 m away from opposite existing access.
16 7.2.23 The vehicle lay-by/drop-off point for cars and taxi shall be located within the Land Parcel and designed for sufficient queuing space within the development so as to ensure smooth flow of vehicles along the main road.
Pedestrian Access Arrangement
7.2.24 The design of the proposed development should take into account convenience and direct pedestrian accessibility to transport nodes. The successful tenderer shall provide direct pedestrian access gate to the bus stops along Upper Serangoon Road and Woodleigh MRT Station.
Covered Linkway
7.2.25 The successful tenderer shall at his own cost and expense, construct a covered linkway from the proposed main development access to link to LTA’s covered linkway plans according to the standard LTA covered linkway design. The proposed covered linkway shall be constructed in accordance with LTA’s technical requirements and alignment.
7.2.26 No glass material is allowed for the covered linkway.
7.2.27 The successful tenderer shall at his own cost and expense, maintain the completed covered linkway(s) to the satisfaction of the relevant Competent Authorities until such time when the covered linkway(s) are handed over to the LTA for ownership and maintenance.
7.2.28 The LTA will only take over the maintenance of the covered linkway(s) when they are satisfied that the covered linkway(s) complies with their requirements. To facilitate LTA to take over covered linkway(s) within road reserve, the covered linkway(s) structures outside the Land Parcel have to be structurally independent.
Proposed Cycling Paths
7.2.29 The successful tenderer shall at his own cost and expense construct a 2.0 m wide cycling path adjacent to the footpath abutting the development, along Upper Serangoon Road and Woodleigh Lane as shown indicatively on Control Plan. The scope and details of the cycling paths treatment are to be determined in consultation with LTA during Development Control Submission Stage. Generally, the finishing of the cycling path shall follow the existing cycling path network, if there is one near the development. If the nearby cycling path network is still under planning stage, the successful tenderer shall construct the 2.0 m wide cycling path as a footpath. Conduit pipes shall be laid under the cycling path for future provision of lightings by LTA.
17 Prefabricated Prefinished Volumetric Construction (PPVC)
7.2.30 The successful tenderer is to obtain a permit from LTA for laden or unladen vehicles which fall into the following categories:
a. Having an overall width exceeding 2.6 m when travelling on controlled roads (please see https://prompt.lta.gov.sg/WebUIPWAS/Information/RoadsControl ledList.aspx), or exceeding 3 m when travelling on any road other than a controlled road; or b. Having a rear overhang of load of 1.8 m or 40% of the vehicle length whichever is lesser; or c. having an overall weight exceeding its allowable weight limit (please see https://prompt.lta.gov.sg/WebUIPWAS/common/images/FAQ%2 0Q1%20here2.jpg )
7.2.31 In addition to a permit, auxiliary police escort (escorted vehicle movement from 7 pm. to 5 am. on major roads, from 11 pm. to 5 am. on expressways only) is required if the laden or unladen vehicles which fall into the following categories:
a. Having an overall width exceeding 3.4 m; or b. Having an overall weight of 80 tonnes or more; or c. Having an overall height exceeding 4.5 m
7.2.32 The successful tenderer shall comply with the LTA’s guidelines on oversized vehicle movement.
7.2.33 Oversized vehicle delivery operation / access point:
a. The delivery time period wher oversized vehicle wold be utilized shall be conducted where traffic is low, this timeline is subject to the LTA’s approval; b. The delivery access point shall be taken from a dual-2 lane road or wider; c. All activities shall be conducted within the Land Parcel; and d. No PPVC deliveries shall be carried out from 7 am. to 9 am. from 5 pm. to 7 pm.; or during Stamford American International School assembly and dismissal periods. e. All traffic operation plans consisting of delivery of the PPVC modules, marshalling of traffic, etc. (road diversion, if any) shall be submitted to the LTA for advice before implementation.
7.2.34 First-time applicants must register through LTA.PROMPT via https://prompt.lta.gov.sg/WebUIPWAS/Login.aspx for access. Applications are to be made at least 3 working week days in advance.
18 Rail Requirements
7.2.35 The Land Parcel falls within the MRT Railway Protection and Railway Safety Zones. The successful tenderer shall comply with the following requirements:
a The successful tenderer shall submit the proposal to LTA-DBC- Rail for approval according to the Rapid Transit System (Development and Building Works in Railway Corridor and Railway Protection Zone) Regulations.
b The design and construction of the proposed building and development works should comply with the technical requirements specified in Code of Practice for Railway Protection.
c Clearance shall also be obtained for any restricted activities to be carried out in accordance with the Rapid Transit System (Railway Protection, Restricted Activities) Regulation (1997) and its amendments. These activities carried out in the railway protection zone should also satisfy Guide to Carrying out Restricted Activities within Railway Protection and Safety Zone.
8.0 NATIONAL PARKS BOARD (NParks)
8.1 General
8.1.1 In carrying out the proposed development, the successful tenderer shall adhere to all of NParks' standard requirements and ensure that all trees with girths of more than 1 metre measured 0.5 metres from the ground, which are growing or situated on any land designated as a tree conservation area or on any vacant land pursuant to the Parks & Trees Act (Cap.216), whether such trees are on the Land Parcel, or on any neighbouring or adjoining land, or along any common boundary line of such land or lands, shall be protected, unless otherwise approved by NParks for removal.
8.1.2 The development is to comply with requirements for green buffers and 2-metre wide peripheral planting verges. The green buffers and peripheral planting verges must be free from any encroachment above ground, and/or are to be recessed to at least 2-metre below ground level, and are not to slope with gradients steeper than 1:2.5.
8.1.3 The successful tenderer is to consult NParks’ Parks and Trees Regulatory (PTR) Branch early at the planning and design stage on the felling of any trees that may be affected by the proposed development with a copy of recently surveyed plan of the site (of less than 2 years) and its peripheral roads, at a scale of at least 1:500, clearly indicating information on tree species, height and girth.
19 8.1.4 The successful tenderer is to ensure that existing roadside trees abutting the Land Parcel are not to be affected, except with approval from NParks, for vehicular ingress / egress, taxi lay-bys, pick-up / drop- off points, services access, loading / unloading bays, fire engine hard- standing areas and any other statutory requirements to divert or reconstruct services or road features / elements etc. The successful tenderer is to consult NParks on tree protection criteria of the roadside trees during early design stage.
8.1.5 The successful tenderer is required to replace existing roadside green verge abutting the Land Parcel with a new one if the existing green verge is affected by the proposed development. The width of the new planting verge is either to be provided in accordance with LTA’s standard road code for that category of road or to match the existing verge along the road.
8.1.6 The successful tenderer is to inform NParks at least 8 weeks before commencement of works, for consideration to transplant / salvage existing trees either within the Land Parcel and / or existing roadside trees. The cost for transplanting / salvaging of the existing trees, if selected, will be borne by NParks.
8.2 Particular Requirements
8.2.1 The successful tenderer is required to retain and protect the Angsana tree marked as T[128] on the Planimetric Survey Plan within a tree protection zone (TPZ) of 5 m and there should not be any works within the TPZ.
Woodleigh Lane
8.2.2 NParks will be transplanting existing trees/plants along Woodleigh Lane that are affected by the proposed road widening works. To facilitate this, the successful tenderer shall give NParks 8 weeks prior notice before the commencement of works.
9.0 NATIONAL ENVIRONMENT AGENCY (NEA)
9.1 General
9.1.1 Under the Environmental Protection and Management (Control of Noise at Construction Sites) Regulations, construction sites within 150 m of residential estates need to comply with more stringent noise limits at construction stage, especially during night time hours and other times as specified by NEA. Hence, the successful tenderer shall implement proper noise control measures during the construction period to ensure that the noise emission levels from the activities are within noise limits and would not cause nuisance to any nearby residents. In addition, construction activities for the proposed development are not allowed to be carried out from 10 pm on Saturday to 7 am on the following Monday 20 as well as from 10 pm on the eve of public holiday to 7 am on the day after the public holiday.
9.1.2 The proposed development shall comply with all the applicable requirements and provisions of the Singapore Standard on Code of Practice for Pollution Control (i.e. SS593:2013), the Code of Practice on Environmental Health, the Code of Practice on Sewerage and Sanitary Works, the Code of Practice on Surface Water Drainage, the Code of Practice for the Control of Legionella Bacteria in Cooling Towers, the Environmental Protection and Management Act, the Environmental Public Health Act, the Sewerage and Drainage Act, the Radiation Protection Act, the Energy Conservation Act and their Regulations.
9.1.3 Abatement measures shall be provided for all proposed M&E equipment installed in the proposed development to mitigate the impact of noise, smell, fume, vapour or heat flux from operations and maintenance of these equipment on residential and noise sensitive premises. The successful tenderer shall ensure that the noise emitted from the operations of M&E equipment installed in the proposed development does not cause nuisance to surrounding residential and noise sensitive premises. The successful tenderer may take reference to the NEA’s Guidelines on Boundary Noise Limits for Air-Conditioning and Mechanical Ventilation Systems in Non-Industrial Buildings for the noise limits. A copy of the Guidelines may be viewed at http://www.nea.gov.sg/docs/default-source/anti-pollution-radiation- protection/central-building-planning/guideline-on-boundary-noise-limit- for-air-conditioning-and-ventilation-systems-in-non-industrial- buildings-apr-2014.pdf
9.1.4 Sewage and sullage water from the proposed development shall be discharged into the public sewer. The QP/developer shall check with PUB (Water Reclamation Network Department) on the point of sewer connection and the allowable discharge rate.
9.2 Particular Requirements
9.2.1 The Land Parcel is within Marina Water Catchment Area, where rainwater and surface runoff are collected in the downstream reservoir for treatment to produce drinking water by PUB. The proposed development shall not cause pollution directly or indirectly to the water resources. Activity that could cause serious contamination problem to the water resources shall not be carried out. The successful tenderer shall comply with the requirements for developments in water catchment areas as shown in Annex E.
9.2.2 The Land Parcel abuts a major road (i.e. Upper Serangoon Road) and is located in the vicinity of Paya Lebar Airbase, Woodleigh MRT station, Woodleigh Waterworks, Stamford American International School, proposed commercial developments and residential developments. Hence, the subject site has high ambient noise level attributed to road 21 and rail traffic, M&E equipment operations, commercial and community events/activities carried out in the vicinity. The successful tenderer is advised to factor the high ambient noise level and other nuisance impacts in the layout planning and design of the proposed development, such as siting the proposed residential buildings as far away as possible from the nuisances sources, and incorporate mitigation measures in the proposed development to mitigate noise and other nuisances impact. The successful tenderer shall carry out a noise impact assessment (NIA) to demonstrate that the noise level at residential buildings façade would not exceed 67 dBA (Leq 1 hour) and the indoor noise level would not exceed 57 dBA (Leq 1 hour) under natural ventilated condition with windows/sliding doors fully opened. The successful tenderer shall obtain NEA’s clearance of the NIA and submit it as part of the development application to URA before the development application can be considered for Provisional Permission (PP), subject to compliance with the relevant planning requirements. The successful tenderer shall also inform the prospective buyers of the apartment units of the potential disamenities posed by the activities carried out in the vicinity of the subject site.
10.0 BUILDING AND CONSTRUCTION AUTHORITY (BCA)
10.1 Buildable Design and Constructability Requirements
10.1.1 The successful tenderer is required to adopt labour-efficient designs and construction technologies to achieve the higher Buildable Design Score and Constructability Score as set out in the Code of Practice on Buildability for the development on the Land Parcel.
10.1.2 The Buildable Design Score computes the extent of standardisation, simplicity and integrated elements applied to buildings at the design stage. It measures the potential impact of a building’s design on labour usage. The higher the Buildable Design Score obtained, the easier it is to construct. The Constructability Score measures the level of adoption of labour-efficient construction methods and construction processes such as system formwork and climbable scaffolding. Higher constructability scores would translate to savings in manpower and shorter construction time. More details are available at http://www.bca.gov.sg/BuildableDesign/legislation2011.html.
10.1.3 The successful tenderer shall comply with the requirements, procedures, directions and requests of BCA and shall also render his full co-operation to BCA, its officers, employees and agents in relation to meeting the required Buildable Design Score and Constructability Score.
10.2 Prefabricated Prefinished Volumetric Construction (PPVC)
10.2.1 The successful tenderer is required to adopt the minimum level of use of prefabricated refinished volumetric construction as stipulated under 22 the Building Control (Buildability and Productivity) Regulations for the development on the Land Parcel for Residential use.
10.3 Prefabricated Bathroom Units (PBU)
10.3.1 The successful tenderer is required to adopt prefabricated bathroom units (PBUs) for 65% or more of the bathroom units in the non-landed residential component of the development on the Land Parcel as stipulated under the Building Control (Buildability and Productivity) Regulations.
11.0 OTHER INFORMATION
11.1 The estimated cost, excluding prevailing GST, of relocation/ diversion for:
Diversion of private hydrant (Clause 3.6.3) $10,000/= Diversion of 230kV cables (Clause 4.2.3) $2,500,000/= Diversion of 22kV and LV cables (Clause 4.2.5) $240,000/= Diversion of Singtel cables and manholes (Clause 5.2.2) $300,000/= Diversion of Starhub cables and manholes (Clause 5.2.2) $37,000/= Diversion of Superloop cables and manholes (Clause 5.2.2) $532,000/= Diversion of Gas main (Clause 6.2.2) $90,000/=
11.2 The above estimate is indicative only. It is based on information and facts known to the Authority at the time when the estimate is made. The Authority and the Competent Authorities and Public Utility Licensees do not warrant the accuracy of the above estimate.
11.3 For the diversion of the existing services, the successful tenderer shall liaise with the Competent Authorities and Public Utility Licensees/ Telecommunication System Licensees on the time frame required to complete the diversion work from the date payment for the diversion cost is received from the successful tenderer.
23 ANNEX A
DISCLAIMER NOTE (SERVICES PLAN):
INFORMATION OF EXISTING SERVICES Services positions indicated in the attached plans are approximate only and not to scale. The successful tenderer / purchaser is required to consult the relevant Competent Authorities and Public Utility Licensees on the exact services positions and updated services layout, if any. The Authority is not responsible for the accuracy or completeness of the attached plans and shall not be liable in any way for any loss or damage incurred by any person as a result of use of or reliance made upon the information contained in any of the attached plans or as a result of any error or omission therein.
The successful tenderer / purchaser is advised to engage his own Licensed Cable Detection Worker to carry out cable detection works and if necessary to carry out trial holes / trenches, irrespective of whether or not underground services are indicated in any of the attached plans, so as to determine the presence of underground services prior to earthworks and to take precautions to avoid damaging the services.
For plans on electrical cables and gas and/or Singtel plant route, please approach the following Public Utility Licensee for details:-
Electricity and Gas
SP PowerGrid Ltd Earthworks Monitoring & Cable Protection Section Pasir Panjang District Office 25 Pasir Panjang Road Singapore 117536 Tel: 6470 0660 / 6470 0621 Fax: 6475 9400 / 6479 5660
More information on purchase of cable or gas pipe plans are available under contact us at http://www.singaporepower.com.sg
Singapore Telecommunications Limited (Singtel)
Singapore Telecommunications Limited Outside Plant Engineering 375 Tanjong Katong Rd, #03-00 Blk 1 Katong Telecommunication Complex Singapore 437132 Tel: 63425900/ Fax : 64406305 E-mail: [email protected]
More information on purchase of Singtel plant route plans are available under at http://info.singtel.com/earthwork
24 Annexes A-1 of the Conditions and Requirements of Relevant Competent Authorities and Public Utility Licensees are services plans of the relevant authorities and will not be available for viewing via the URA website. Please contact Mr Neo Chin Kee at Tel No. 6321 8268 to register for the viewing of plans.
25 Annexes A-2 of the Conditions and Requirements of Relevant Competent Authorities and Public Utility Licensees are services plans of the relevant authorities and will not be available for viewing via the URA website. Please contact Mr Neo Chin Kee at Tel No. 6321 8268 to register for the viewing of plans.
26 ANNEX B Dimensions for Bicycle Parking Space and Racks
1 A Bicycle Parking Space refers to the space for parking of one bicycle. A bicycle parking rack should be provided for each bicycle parking space and anchored to the ground so as to allow cyclists to lock their bicycles with ease. The rack should support the bicycle upright by its frame.
2 Designers should also allow adequate clearance for users to lock their bicycles with racks. The following are suggested designs and dimensions that designers can adopt for bicycle parking racks.
i. Single-tier bicycle parking space Space Width: 600mm Space Length: 1800mm Aisle Width: 1500mm (min)
Each space should be equipped with a bicycle rack anchored to the ground.
Figure 2 (i) Single-tier bicycle parking space
ii. Bicycle Rack Dimension for Single-tier bicycle parking Width: 600mm Length: 900mm Diameter: 50mm
Figure 2 (ii) Bicycle rack dimension for single-tier Bicycle parking
27 iii. Double Tier Bicycle Parking space Space Width: 650mm Space Length: 2000mm Aisle Width: 2500mm
Figure 2 (iii) Double-tier bicycle parking space iv. Bicycle Rack dimension for Double Tier Bicycle Parking Width: 100mm Length: 1825mm Height: 1590mm Headroom 2600mm clear
Figure 2 (iv) Bicycle rack dimension for double-tier Bicycle parking
28 ANNEX C
PREVENTION OF DAMAGE TO PUB WATERMAINS
General
1 We would like to draw your attention to Section 57 of the Public Utilities Act which stipulates a duty to enquire on water mains if any person wishes to carry out any work in the vicinity of watermains. We wish to highlight that under Section 47A of the Public Utilities Act, any person who, whether wilfully or otherwise, removes, destroys or damages or causes or permits to be removed, destroyed or damaged, any watermains belonging to or under the management or control of the Board, shall be guilty of an offence and shall be liable on conviction to a fine not exceeding $40,000 or to imprisonment for a term not exceeding 3 months or to both; or if the watermains is 300 mm or more in diameter, to a fine not exceeding $200,000 or to imprisonment for a term not exceeding 3 years or to both. For more information of the Public Utilities Act, please refer to http://statutes.agc.gov.sg/.
2 Before commencing any works in the vicinity of PUB watermains, the QP shall obtain Water Service Plan (WSP) which indicates the approximate position of the water mains and raw water mains in the vicinity of the development. Smaller submains and connection pipes (< 100 mm) to customers' premises/properties may not be included. The QP is to determine and indicate the exact alignments and depths of the watermains, submains and connections, on site by means of trial holes using manual excavation especially near watermains before commencement of any work. The position and alignment of the watermains shall be indicated on the survey plan, and shown at site to allow easy identification of the watermains in future after completion.
3 The QP shall design both the temporary and permanent works in such a way to ensure that ground movements are kept to an absolute minimum. The employment of proven techniques and good workmanship are important to minimize ground loss and in turn ground movements.
4 The QP shall select and ensure the operation of construction equipment shall be in a manner such that vibration induced damage to the watermains is prevented.
5 The QP shall establish and inform PUB of the procedures and methods for all excavation and other construction works within 10 meters radius of PUB watermains to prevent damage to the watermains during the work.
6 Before commencement of works, the QP shall submit the detailed method statement and drawings for the construction works, details of the machinery/equipment used with analyses / assessment to demonstrate that the construction method proposed is non-invasive and will not cause any impact or damage to the watermains.
7 Equipment Vibrations - Construction activities such as piling, excavation, soil improvement, diaphragm wall and retaining wall construction etc and the use of construction equipment such as piling/boring machine etc shall not subject the watermains to a peak particle velocity (PPV) exceeding 15 mm/s at any frequency. The QP shall provide a detailed impact assessment that clearly demonstrates the 29 vibration attenuation for each of the equipment proposed to be used at the development site and in similar ground conditions to show that this vibration limit would not be exceeded on the existing watermains.
8 Ground Displacements - Ground displacements caused by construction or other activities shall be “zero”. If the QP's analysis shows that the ground displacement due to the construction or other activities exceeds “zero”, a further design check shall be undertaken to ensure that the construction or other activities will not induce any damage to the watermains.
9 Groundwater Drawdown - The groundwater drawdown shall not exceed 10 kPa in the vicinity of the PUB watermains.
10 No heavy machinery or vehicles shall be located or driven over PUB watermains.
11 Construction Impact Assessment Report (CIAR) - The QP shall carry out a construction impact assessment of the construction effects of the works on the watermains in the vicinity of the works and submit the report to PUB for records. The report shall include the following details:
(i) The ground conditions, geotechnical profiles and relevant borehole logs.
(ii) The proposed construction equipment and methods, and sequencing of construction.
(iii) Assessments on the use of the proposed construction equipment /methodology on the existing watermains, vibrations, ground displacements and groundwater draw downs and how the impacts would be mitigated to meet requirements.
(iv) Vibration characteristics and attenuation for major construction equipment/methodology.
(v) Instrumentation and monitoring proposals.
(vi) The damage potential and risks to the watermains.
(vii) Preventative and precautionary measures to protect the watermains from damage and remedial measures to be taken in the event of damage/incidents.
12 The QP shall advise PUB on the assessed probable risk and level of damage to the watermains and his proposed mitigating measures for preventing the watermains and watermains structures from damage to the satisfaction of PUB.
Instrumentation and Monitoring Programme
13 The QP shall carry out an instrumentation and monitoring programme to monitor the surface and subsurface ground movements, vibrations, the variation of ground water table and pore pressures, and the displacement and distortion of watermains.
30 14 The QP shall include in the monitoring plan all watermains that in his view are likely to be affected by the works.
15 The QP shall submit full details of the proposed monitoring procedures and instrumentation to PUB for concurrence before commencing the works.
16 The QP’s method statement shall include the proposed monitoring intervals and all requirements imposed by PUB.
17 The QP shall review the safe limits of ground movements, vibration levels or other changes for ensuring the structural integrity and proper functioning of all watermains. The QP is to provide PUB with the new alert level and stop work level for each of the monitoring instrumentations that will be deployed at site. He shall provide comprehensive basis for the proposed safe limits.
18 The QP shall provide a recharge well at site to maintain existing ground water table so as to prevent ground subsidence. The QP is to provide the proposal for the recharge well, with the technical drawing and calculation, to PUB for approval.
19 The QP shall verify and certify by monitoring that construction works have not resulted in displacements or vibration levels that have or will cause damage to any watermains. As a minimum, the following are required to be carried out and the relevant details are to be submitted to PUB:
i Monitoring of the displacements or vibration levels of watermains or the adjacent ground from the construction works.
Ii Preparation of action plans for remedial action in the event that displacements or vibration levels exceed the design limitations or cause damage.
20 It shall be clearly understood that the submissions of the instrumentation monitoring results and reports to PUB are only for PUB’s information. The QP shall be fully responsible for the analysis and interpretation of all the readings and measurements and for taking all remedial measures where necessary. When abnormal readings or measurements are obtained, QP shall immediately investigate the causes of the abnormalities and take all necessary remedial measures. QP shall promptly inform PUB should such abnormalities be likely to affect the structural integrity of the watermains.
21 Instrumentation monitoring regime consists of inclinometers, ground settlement markers, vibration meters, piezometers, strain gauges, rod extensometers, etc. shall be carried out by QP to check whether ground movements & vibration impacts are within allowable limits during the construction works. Records of the instrumentation monitoring regime shall be endorsed by the QP and properly maintained at the site, submitted to PUB or made available for inspection by PUB upon request.
22 QP shall monitor and review the instrumentation monitoring results twice daily during the construction work on each day. QP shall look out particularly for excessive ground movements that may cause damage to the watermains. The QP shall submit the instrumentation monitoring records to PUB at a frequency stipulated by PUB. QP 31 shall highlight in his submission if there are any excessive ground movements monitored or any other abnormalities.
23 QP shall stop the works immediately if the instrumentation monitoring results exceed the allowable limits and inform PUB immediately before investigating whether the works have any impacts on the watermains. The QP shall submit his assessment of the impacts of the works on the watermains, including his proposed mitigating measures to address the excessive ground movement or any other abnormalities, to PUB for approval, before resuming the works.
24 It shall be clearly understood that the submissions of the instrumentation monitoring results and reports to PUB are only for PUB’s information. The QP shall be fully responsible for the analysis and interpretation of all the readings and measurements and for taking all remedial measures where necessary. When abnormal readings or measurements are obtained, QP shall immediately investigate the causes of the abnormalities and take all necessary remedial measures. QP shall promptly inform PUB should such abnormalities be likely to affect the structural integrity of the watermains.
Surveillance Cameras above Large Diameter Watermains ( ≥ 300mm in Diameter)
25 Contractor shall provide web-based IP surveillance cameras to continuously monitor construction activities in the vicinity of the large diameter ( ≥ 300mm) watermains. The number of cameras to be provided shall be approved by PUB and shall be sufficient to cover at least 6 meters from the watermains.
26 The surveillance cameras must be able to capture still pictures and perform continuous video recording.
27 The contractor shall provide PUB with the Internet website address for centralized viewing of the still picture and video recordings of the construction activities above PUB watermains captured by the surveillance cameras.
28 For any enquiries, please consult Mr Chin Wei Khin / Mr Lau Sze Kiat at 63809832 or Email: [email protected] / [email protected].
32 ANNEX D
REQUIREMENTS WHEN WORKING IN THE VICINITY OF SP POWERASSETS EHV 230Kv and 400Kv CABLES & ACCESSORIES
1. Under the Electricity Act, earthworks contractors must obtain all necessary cable plans and engage Licensed Cable Detection Worker (LCDWs) to carry out cable detection before commencing earthworks. Your LCDW should peg the location of cables and identify the type of cables that are present underground. The earthworks contractor must also submit the ’Notice for Commencement of Earthworks Within Vicinity of High Voltage Cables’ (NCE) at least 7 days prior to the commencement of any earthworks. The NCE is to be submitted to SP PowerGrid Ltd, Earthworks Monitoring & Cable Protection Section (EMCP), Pasir Panjang District Office, 25 Pasir Panjang Road, Singapore 117536. You will receive a ‘Letter of Requirements for Earthworks’ to highlight the necessary procedures and action to be taken. You may proceed to commence earthworks at the end of the 7 days notification period after you have complied with all the recommendations given by SP PowerGrid Ltd.
2. Earthworks contractors are to engage only Registered Excavator Operator (REO) or Provisional Registered Excavator Operator (PREO) to carry out mechanical excavation or to drive mechanical excavator.
3. Provide a full time site supervisor during earthworks. The site supervisor is to guide the REO/ PREO during the operation of the excavator. No earthwork is to be carried out without the supervision of the site supervisor.
4. Trial holes must be dug to confirm the absence or presence of cables prior to the earthworks. They should be dug manually to be sure that there are no underground electricity cables at the proposed earthworks area, or to ascertain the exact locations if there are cables. Trial holes are to be carried out only to the slab level and the slabs are not to be removed. Any removal of slabs, exposure of cables and its auxiliary, is strictly prohibited and must be done only in the presence of SP PowerGrid’s personnel. It is best to consult your LCDW whenever in doubt.
5. When working in the vicinity or above the cable, mechanical excavation under close supervision, should be used only for the removal of pre-mixed concrete and the hardcore at the road surface level. Following that, manual means should be employed to excavate the earth below.
6. Use plastic buckets or similar non-metallic containers for clearing soil and debris from the trench instead of the excavator bucket. The excavator should also not be used for trimming the side of trenches.
7. No mechanical excavation works shall be carried out within 2 metres of any cables (reference from the nearest outermost edge of cable). Consult EHVN Section should your proposal affects EHV cables or its accessories, within a two- metre-round clearance. For piling and deep excavation works, the requirement will be more stringent and it may require a clearance of more than 2 metres.
33 8. No temporary or permanent structure including trees and hardstanding area for fire engine, shall be erected or planted over the cables. Cables and accessories must be accessible to SP PowerGrid’s personnel and vehicles at all times for maintenance purposes.
9. Consult EHVN Section before proceeding with under-crossing or over-crossing of EHV cables. Adequate clearance and appropriate protection measures must be provided for these cables.
10. Contractor with experience in handling 66kV and above cables, shall be engaged to carry out the suspension and protection of the cables. This is to be carried out in the presence of SP PowerGrid’s personnel.
11. Provide appropriate and adequate soil control measures - such as shoring, strutting etc. to prevent soil movement which can cause cable damage in excavated areas. Where necessary a detailed Method of Statement with Professional Engineer’s endorsement is required.
12. All cable positions must be demarcated with adequate and prominent signs. Pegging and markings by LCDW must be durable and prominent. Cable-route and joint-markers must be left intact and should not be buried or shifted without consulting EHVN Section. Supervisors must be made fully aware of cable positions. LCDW cable detection drawings and cable plans must also be displayed at site at all times.
13. All site staff and workers must be briefed on the presence and location of cables. Close supervision must be provided when working in the vicinity of EHV cables. New staff must be briefed of the above. Daily briefing should be given to workers who carry out excavation works and the records of such briefing kept.
14. Implement and audit the Permit-to-Work (PTW) system to monitor and ensure that all earthworks are properly tracked and controlled.
15. Driving or sinking of any earth rod, casing or tube into the ground are considered as earthworks under the Electricity Act. Please inform your electrical contractor to comply with the statutory requirements under the Act.
16. Cables and accessories must be reinstated to their original condition in accordance with SP PowerGrid requirements. Site inspection together with SP PowerGrid’s personnel must be arranged prior to backfilling works.
17. In accordance with the Electricity Act, EHV cables shall not be hindered or prevented from their intended use of operation. Where the proposed works were to cause such a hindrance, the affected cables or/and the accessories shall be diverted and the cost of diversion shall be borne by the party concerned. Alternatively, relocate the proposed works away from the cables to avoid damaging these during earthworks.
18. Please be reminded that these are major transmission cables and accessories. Every precaution must be taken to prevent cable damage. Notwithstanding the aforementioned requirements on the EHV cables and accessories, similar 34 precaution may apply to other SP PowerAssets cables. Please consult Regional Network Sections on the requirements for Distribution cables.
19. For enquiries and assistance on cable protection works on EHV cables (230kV and 400kV), contractors can contact EHVN Section at telephone number 62909121.
20. Consult EHVN Section should your work involves deep excavations which may result in ground movement or settlement.
21. Contractors or their workers must report all cases of exposed cables to Electricity Service Centre (ESC), at telephone number 1800-778 8888. Every precaution must be taken to prevent cable damage. Should any damage occur, please stop all works activities in the vicinity of the damage cable, keep personnel out from the area inform ESC and your LCDW of the damage.
35 ANNEX E
POLLUTION CONTROL MEASURES FOR PROPOSED DEVELOPMENT WITHIN WATER CATCHMENT AREA
1 Storage of Toxic Chemicals
(a) No toxic or hazardous chemicals shall be stored or moved within the premises.
(b) Storage of fuel may be allowed subject to provision of pollution control measures as stipulated in the Singapore Standard on Code of Practice for Pollution Control (i.e. SS593:2013).
2 Public Sewerage System
(a) Public sewerage system shall be extended to serve the proposed developments.
(b) All sewage shall be collected and discharged into the public sewers.
3 Drainage System
Vertical steel gratings shall be installed at major outlet drains.
4 Refuse Management System
Storage and transfer of refuse shall be confined within buildings.
5 Pollution Control Measures
(a) The exterior walls of buildings shall, where practical, be constructed, coated or clad with materials that do not require periodic painting.
(b) Boundary fence/wall shall, where practical, be built with materials that do not require periodic painting.
(c) The developments shall be designed to ensure that all activities that generate wastewater or spent oil are carried out within buildings. The design may include the following:
All sanitary fittings including wash areas be provided within buildings.
36 Kitchens be designed to have sufficient area to ensure that all food preparation and washing facilities are confined to within the premises.
Washing bays for vehicles be provided within buildings and wastewater from the washing of vehicles be collected, treated and reused or discharged into the sewers.
6 Pollution Control Measures at Construction Stage
(a) During construction stage, no sewage from the construction sites shall be discharged into the open drains leading to the reservoir.
(b) All washings activities shall be carried out within the buildings and all sewage and the wastewater shall be collected and discharged into the public sewerage system or holdings tanks and tankered away for disposal at a Water Reclamation Plant approved by PUB.
(c) No servicing and repairing of mechanical plants and equipment are allowed within the construction sites.
(d) Fuel storage tanks, if any, shall be provided with containment facilities as stipulated in the Singapore Standard on Code of Practice for Pollution Control (i.e. SS593:2013).
(e) The requirements for the control of silt discharge from a construction site as stipulated in the Code of Practice on Surface Water Drainage shall be complied with.
37