Volume 3 Sec 1 General Requirements

Central Waste Water Treatment Plant – Kula and Vrbas Tender DocumentsVolume III – Section 1 (General Requirements)

This volume is one of a set of volumes comprising:

VOLUME ONE INSTRUCTIONS TO TENDERERS

VOLUME TWO CONDITIONS OF CONTRACT

VOLUME THREE GENERAL AND SPECIAL REQUIREMENTS

VOLUME FOUR MODEL FINANCIAL BID PRICE BREAKDOWN

VOLUME FIVE TENDER DRAWINGS and SUPPOR-TING DOCUMENTATION


VOLUME III

SECTION 1: GENERAL REQUIREMENTS

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EuropeAid/128697/C/WKS/RS (08SER01/13/31) Page 2 of 110


Table of Contents

TABLE OF CONTENTS 3

3.1 GENERAL SUPERVISORS REQUIREMENTS 7

3.1.1 Introduction 73.1.1.1 The Contracting Authority 83.1.1.2 Location of the WWTP Site 83.1.1.3 Intended Purpose of the Works 8

3.1.2 Scope of Works 83.1.2.1 General 93.1.2.2 Civil Engineering Works 103.1.2.3 Mechanical Installations 113.1.2.4 Electrical Systems 113.1.2.5 Electrical Installations 123.1.2.6 Provisional Time Schedule 123.1.2.7 Operation of the Facilities 143.1.2.8 Plant Operation and Training 143.1.2.9 Contract Limits 14

3.1.3 Technical Standards and Building Regulations 153.1.3.1 SI-Units 173.1.3.2 Reference Standards 173.1.3.3 Standards of Material and Standards of Workmanship 183.1.3.4 Standards on Site 183.1.3.5 Matters not covered by Standards 183.1.3.6 Abbreviations and Terms 183.1.3.7 Reliability and Redundancy of Installations 193.1.3.8 Standardisation of Equipment 19

3.1.4 General Requirements 203.1.4.1 General 20

3.1.4.1.1 Information on Site Conditions and Subsurface Information 203.1.4.1.2 Temporary Fencing and Marking of Sites 203.1.4.1.3 Signboards 203.1.4.1.4 Billposting and Advertising 20

3.1.4.2 Electricity, Water, Gas and Other Services Available on the Site 203.1.4.2.1 Electricity and Lighting 203.1.4.2.2 Water Supply and Sanitation 213.1.4.2.3 Communication 21

3.1.4.3 Phased Possession and Right of Access to the Site 213.1.4.3.1 Access Roads 223.1.4.3.2 Temporary Access 223.1.4.3.3 Traffic Arrangements 22

3.1.4.4 Dealing with Water/Maintenance of Flow 223.1.4.4.1 Storm Water Protection 23

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3.1.4.4.2 Existing Underground Utilities/Structures 243.1.4.4.3 Maintenance / Diversion of Existing Utilities 24

3.1.4.5 Contractor's Equipment 243.1.4.6 Public Convenience 25

3.1.4.6.1 Environmental Constraints 253.1.4.6.2 Prevention of Noise and Disturbance 263.1.4.6.3 Traffic Arrangements and Access 263.1.4.6.4 Storage of Equipment and Materials in Public Streets 263.1.4.6.5 Cleanliness of Public Roads 273.1.4.6.6 Cleanliness on Site 273.1.4.6.7 Pollution Prevention 27

3.1.4.7 Health & Safety 273.1.4.7.1 Safety – General 273.1.4.7.2 Safety in Sewers and at Sewage Works 283.1.4.7.3 Safeguarding Equipment 283.1.4.7.4 Accidents, Extraordinary Events 283.1.4.7.5 Fire Prevention 283.1.4.7.6 Lighting and Electric Power 293.1.4.7.7 Equipment Safety 293.1.4.7.8 Security 29

3.1.4.8 Levels and Benchmarks / Setting out of the Works 293.1.4.8.1 Levels and Benchmarks 293.1.4.8.2 Setting out of the Works 30

3.1.4.9 Other Contractors on the Site 303.1.4.9.1 Third Parties 313.1.4.9.2 Subcontracted Works 313.1.4.9.3 Subcontract Orders 31

3.1.5 General Design Requirements 323.1.5.1 Site Information’s 32

3.1.5.1.1 Location and Area of the WWTP 323.1.5.1.2 Meteorological Data 323.1.5.1.3 Topography 333.1.5.1.4 Geological Conditions 333.1.5.1.5 Seismic Conditions 33

3.1.5.2 Design Regulations 333.1.5.2.1 Design Life 343.1.5.2.2 Warranty for Materials Incorporated in the Works 343.1.5.2.3 Spare Parts 353.1.5.2.4 EIA Requirements 353.1.5.2.5 Maximum Noise Levels 353.1.5.2.6 Odour Control 35

3.1.5.3 General Design Requirements 373.1.5.3.1 Preliminary - Conceptual Design 373.1.5.3.2 Final and Detailed Design Generally 383.1.5.3.3 Access and Service Roads 393.1.5.3.4 Power Supply 393.1.5.3.5 Site Lighting 393.1.5.3.6 Potable and Service Water Supply 393.1.5.3.7 Fire Fighting and Fire Hydrants 393.1.5.3.8 Surface Water Drainage 393.1.5.3.9 Solid Waste and Sludge Disposal 403.1.5.3.10 Security Fencing 40

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3.1.5.3.11 As-Built Drawings 403.1.5.3.12 Operation and Maintenance Manuals 413.1.5.3.13 Miscellaneous 41

3.1.5.4 Particular Design Parameters 413.1.5.4.1 Design Horizon 413.1.5.4.2 Contractors Design Proposal 413.1.5.4.3 Submittal of Contractors Design Proposal 423.1.5.4.4 Principal Design Objectives 433.1.5.4.5 Requirements for Operation Stability and Reliability 443.1.5.4.6 General Hydraulic Design 443.1.5.4.7 Requirements for Access for Operation and Maintenance 453.1.5.4.8 General Structural Design 463.1.5.4.9 General Electro-/Mechanical Design 483.1.5.4.10 Particular Process Design 493.1.5.4.11 Plant Control Philosophy 49

3.1.6 Documents and Data Furnished by the Supervisor 493.1.6.1 Permissions Being Obtained by the Beneficiary (P&DB 1.13) 49

3.1.7 Documents to be Furnished by the Contractor 503.1.7.1 Engineering Documents 503.1.7.2 Drawings 513.1.7.3 Contractors Final Design 523.1.7.4 Contractors Detailed Design 533.1.7.5 Method Statements 533.1.7.6 Work Programme 543.1.7.7 Additional Geo-Technical Surveys 543.1.7.8 Additional Drawings 553.1.7.9 Operating and Maintenance Manuals 553.1.7.10 As-Built and Record Drawings 573.1.7.11 Material Safety Data Sheet 573.1.7.12 Progress Photographs 583.1.7.13 Monthly Progress of Works Reports 58

3.1.8 Services and Facilities to be furnished by the Contractor 593.1.8.1 Site Offices for the Supervisor and the Supervisor 593.1.8.2 Services for the Supervisor and the Beneficiary 613.1.8.3 Services during the Defects Liability Period 623.1.8.4 Mobilisation at Site 623.1.8.5 Demobilisation from Site 62

3.1.9 Criteria for Design Personnel 623.1.9.1 Construction Management 623.1.9.2 Site Meetings 63

3.1.10 Quality Control 643.1.10.1 General 643.1.10.2 Responsibilities and Procedures 643.1.10.3 Quality Assurance Plan 653.1.10.4 Sample Materials 673.1.10.5 Testing and Inspection of Material and Workmanship 68

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3.1.10.6 Testing During Manufacture and/or Construction 683.1.10.7 Site Records and Test Certificates 683.1.10.8 Reports and Inventories 693.1.10.9 Concrete Mix 69

3.1.11 Testing of the Plant 703.1.11.1 General 703.1.11.2 Tests on Completion 70

3.1.11.2.1 Test Equipment 713.1.11.2.2 Functional Machine Tests 723.1.11.2.3 Hydraulic Tests 733.1.11.2.4 Damages for Failure to Pass Tests on Completion 74

3.1.11.3 Commissioning 743.1.11.4 Tests After Completion 75

3.1.11.4.1 General 753.1.11.4.2 Testing of Pumps, Blowers, Mixers, Conveying Equipment 753.1.11.4.3 Testing of Sub-Systems 753.1.11.4.4 Damages for Failure to Pass Tests after Completion 76

3.1.12 Plant Operation and Maintenance 763.1.12.1 Staff Training 773.1.12.2 Assistant Plant Operation 783.1.12.3 Assistant Plant Maintenance 783.1.12.4 Staff Requirements 79

3.1.13 Provisional Sums 80

3.1.14 Annex to Volume III Section 1 813.1.14.1 List of Standards 81

LIST OF SERBIAN STANDARDS 82

3.1.14.1.1 German DIN Standards 833.1.14.1.2 German DWA/ATV/DVGW Standards 853.1.14.1.3 EN and ISO Standards 863.1.14.1.4 British Standards 863.1.14.1.5 87

3.1.14.2 Survey Equipment 883.1.14.3 Site Testing of Aeration Equipment 883.1.14.4 Parameters to be analysed and reported for Plant Operation 913.1.14.5 Laboratory Equipment and Furniture 93

3.1.14.5.1 General 933.1.14.5.2 Submittals 933.1.14.5.3 Chemicals 933.1.14.5.4 Accessories 943.1.14.5.5 Manuals 943.1.14.5.6 Laboratory Equipment 94

3.1.14.6 Workshop Equipment 1003.1.14.6.1 General 1003.1.14.6.2 Consumables 1013.1.14.6.3 Accessories 1013.1.14.6.4 Manuals 1013.1.14.6.5 Equipment 102

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General Supervisors Requirements

3.1.1 Introduction

The General Supervisor's Requirements presented herein define the Works, i.e. ”Central Waste Water Treatment Plant (CWWTP) for Kula and Vrbas”, specify the purpose of the Works and par-ticular requirements for the completed Works, including functional requirements, quality, perform-ance and scope, requirements for the supply of certain items (such as consumables), special ob-ligations and other details, generally in accordance with the Conditions of Contract for Plant and Design Build (P&DB), PRAG.

The construction of a Central Wastewater Treatment Plant for Vrbas and Kula presents a continu-ation of numerous Engineering activities and efforts with a common goal, to ensure a contempor-ary wastewater treatment plant in line with European standards and implementation of the overall strategy for rehabilitation of the “Veliki Backi kanal”. Currently untreated sewage is discarhed and consequently water quality in the recipient channels has greatly deteriorated, with siltation and eutrophication. In addition, the channel water has high concentrations of ammonia, organic mat-ter, heavy metals and other toxic substances from industrial effluents.

It is proposed that the future treatment plant would treat municipal and pre-treated industrial wastewater and discharge the effluent into the Becej-Bogojevo channel (part of the DTD hydro system).

Recent technical documentation dealing with the aforementioned issues includes the General Design of WWTP Vrbas and Kula prepared by University of Belgrade – Faculty of Civil Engineer-ing (2005-2006), Feasibility Study Vrbas – Wastewater Treatment and Sewage Collection by MI-ASP-Royal Haskoning (2007) and Preliminary Design of Wastewater Treatment Plant Vrbas and Kula prepared by the Faculty of Technical Science in Novi Sad (2008-2009). Significant social and economic changes in the past 20 years called for updating of wastewater quantity and quality analysis as well as treatment process elaboration in accordance with the EU standards and best practices.

The industrial wastewater will be collected after pre-treatment, and transported via a trunk sewer and sewage pumping stations to the CWWTP location. The main sewer varies in size from DN600 to DN1200, its total length is around 12 km. The section from Vrbas to the future CWWTP location has been constructed with DN1200.

The effluent from the CWWTP shall be transported by a new discharge pipeline, length around 570m to the Becej-Bogojevo channel.

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3.1.1.1 The Contracting Authority

The Contracting Authority of this Works contract is:

The Delegation of the European UnionVladimira Popovića 40; GTC Avenue block 19a, 11070 Belgrade; Serbia

The Supervisor on this Project is:

Municipal Infrastructure Support Programme

The Beneficiary of this Project is:

Vrbas MunicipalityMarsala Tita 88, 21460 VrbasKula MunicipalitiyLenjinova 11, 25230 Kula

3.1.1.2 Location of the WWTP Site

The CWWTP is to be situated at the south east outskirts of the urban town area of Vrbas in ac-cordance with the General plan and aforementioned technical documentation. The location of the future plant will be on the premises of the existing treatment facilities which occupy an area of around 2ha. The plot location is confirmed by the town planning documents (detailed urban regu-lation plan) adopted during 2007. Due to limited area, existing out of date facilities will be aban-doned and demolished, providing free area for construction of the new CWWTP.

The location of the Works is shown on the layout drawings included in Volume V of the these documents:

3.1.1.3 Intended Purpose of the Works

The main objective of the Works is the environmentally sound treatment and disposal of wastewater generated within the Kula and Vrbas areas.

3.1.2 Scope of Works

The Contractor's scope of works and supply shall include all elements and aspects to ensure the proper implementation of the project which includes the design and construction, and commis-sioning of a fully functional WWTP and associated structures. Moreover training of the Benefi-ciary’s personnel and the operation, supervision and management of the rehabilitated WWTP for a period of one (1) month after the issue of the Taking Over Certificate shall be included.

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3.1.2.1 General

The Contractor shall design and build new CWWTP. Works include design and calculation of all structures, infrastructures, materials and equipment for the Wastewater Treatment Plant. Also shall be included all required installations between process units; structures such as inlet struc-tures, primary and secondary treatment facilities, sludge treatment facilities and all other facilities, infrastructure and process units needed for construction works for the first CWWTP stage of 120.000 PE capacity. However, the design solution shall also include the second stage of the CWWTP of additional 60.000 PE.

The Contractor duties shall be but are not necessarily limited to the following:

Any and all necessary design encompassing process, civil, structural, mechanical, electrical,

etc. and other "non-construction" activities for the WWTP;

Co-ordination of the design with all necessary authorities;

Preparing all documents and design to enable the Beneficiary to obtain all necessary permits

according to the relevant National laws and regulations for supplying the WWTP with electri-city, potable water, telephone, gas etc;

Preparation of all documents and designs to completely enable the Beneficiary to obtain (or

adjust the available solution) all permits related to preparation for construction of the Works. After the approval of the designs by the Supervisor, the Contractor will prepare all documents and drawings for all necessary certifications and permits, necessary for the Contractor or the Beneficiary in accordance with the Serbian Law on Planning and Construction published in the Official Gazette of RS No 72/2009 and 81/2009

Construction and installation, erecting and commissioning of the Works, incl. flow diversion

and discharge pipeline to the recipient;

All channels and interconnecting pipework within and between process units, structures and

for inlet systems, bypass systems, outlet, washout systems, service water systems, process related piping and connections to the channels and pipe system; within the limits of the Con-tract as required, including pipes and drains of any description and of all materials with all fit -tings, penstocks, valves and pipe protection, both coating and lining;

Mechanical, Electrical, Instrumentation, Control and Automation (MEICA) equipment, including

motors and pumps;

Laboratory equipment, furniture and spare parts, and reagents as listed;

Workshop equipment and furniture, and spare parts as listed;

Supervisory Control and Data Acquisition (SCADA) System for the WWTP

Regulators, instruments, indicators, recorders, gauge plates, platforms, floor plates and

frames, fixed and portable ladders, handrail, flanges, connectors, gaskets, bolts, nuts, flexible couplings, nameplates, identification tags and bandages, cable splices, glands, boxes, junc-tions and ancillary material; fasteners, clips, stands, trays, hangers, all other auxiliary materials of any description and all materials;

Spare parts for fixed and mobile MEICA equipment, including instrumentation and control re-

quired for 2 years operation after issue of the Taking Over Certificate, in accordance to these requirements;

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Testing, commissioning and handover documentation;

Preliminary handover and training;

Supervision, management and operation of the WWTP for one (1) month after issue of the

Taking Over Certificate;

In particular the Contractors proposal shall cover, but not necessarily be limited to the following:

3.1.2.2 Civil Engineering Works

The term "Civil Engineering Works" shall mean the obligations of the Contractor under the Con-tract to cover all manufacturing, excavation, building, structures, process units and other con-struction Works, which shall be performed by the Contractor.

The following shall be included, but not limited to, within the limits of the Works:

Site investigation levelling, excavation, fill and other earth works;

Demolition of existing structures and removal of debris;

New completed process units and buildings, incl. sludge treatment facilities and associated

sewerage connections (influent/effluent);

Civil works related to complete drainage systems and structures necessary for the disposal of

process waste, overflow, and drainage water, waste or used chemical solutions (including from any laboratory) sludge and storm runoff to receiver;

Landscaping and similar area works with plant roads, temporary roads, and site facilities;

Indoor and outdoor sewerage systems including all sanitary installations inside the buildings;

Water supply plumbing, fixtures and fittings inside buildings;

Complete heating and ventilation/air-conditioning systems together with all facilities for all

buildings and process units, which shall conform to these Requirements;

Complete potable and non-potable water supply systems for the Works for area supply, fire

fighting, supply to all buildings, including all pipework with all necessary fittings, specials, valves, hydrants, storage and make-up tanks and service water systems, booster pumps etc.;

Necessary equipment and material for all stormwater and plant internal wastewater drainage

system, including those to be separately provided for such as wastes from laboratory, waste or used chemical solutions;

All other works whether specified in the Contract Documents, (including the Contractor's pro-

posal) or not, as necessary for the completion of the Works and the operation thereof, and as required under the terms of the Contract;

Excavation of trenches, laying of pipes, welding and protection of the pipes, transport and dis-

posal of excess and demolished materials;

All works for completion of the connection to the existing sewer system;

All temporary and provisional works necessary for proper erection of the plant (temporary

roads, keeping excavation free of water, excavation sheeting and bracing, etc.).

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Completion of all works which shall be provided under the Contract, whether specified in the Con-tract Documents or not, and whether specified therein in part, incomplete or incorrect or not expli-citly described or only implied.

3.1.2.3 Mechanical Installations

The term "Mechanical Installations" shall mean the obligations of the Contractor under the Con-tract to cover all manufacturing, delivery, assembling and installation, testing and commissioning of the required mechanical equipment and machinery for the process units, which shall be per-formed by the Contractor.


All materials and equipment for the Wastewater Treatment Plant within and between process

units structures including connection force mains and effluent system, such as inlet structures, mechanical treatment facilities, biological treatment facilities, sludge treatment facilities or other facilities belonging to the treatment and/or transport process;

Mechanical equipment and machinery, including motors and pumps and spare parts;

Complete piping system, incl. armatures and fittings;

Workshop equipment;

Laboratory equipment;

All other auxiliary materials of any description and all materials.

Spare parts for fixed and mobile mechanical equipment.

3.1.2.4 Electrical Systems

The term "Electrical Systems" shall mean the obligations of the Contractor under the Contract to cover all manufacturing, delivery, assembling and installation, testing and commissioning of the required power supply, power distribution and sub-distribution systems for the process units, which shall be performed by the Contractor.

Electrical power supply from the public mains network, incl. all co-ordination and technical clarific-ation with the responsible power supply companies.


Transformer station

Low tension main distributions, reactive power compensation units, battery systems, safety

and protection devices, etc.;

Low tension systems, c/w separate low tension distributions at all process stages with switch

gear panels; control systems for manual, automatic, local and remote control; PLC units; mar-shalling cabinets; safety and protection devices, etc.;

Complete SCADA, process control and instrumentation system, incl. all instruments required

to supervise and control the various process stages, control systems, control centres at all ma-jor process sections, etc.;

Optional - Digester gas utilisation system and optional power generation system of sufficient

size and number;

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Bi-directional telecontrol system between control points and local control centre.

3.1.2.5 Electrical Installations

The term "Electrical Installations" shall mean the obligations of the Contractor under the Contract to cover all manufacturing, delivery, assembling and installation, testing and commissioning of the complete lighting, telephone and signalization systems for indoor and outdoor (at/in all buildings, streets, ways, places, structures, etc.), incl. emergency lighting, sub-distributions, switches, light sensors, clock timers, poles, fittings and fixtures, etc., which shall be performed by the Con-tractor.


Complete system of power outlet sockets for indoor and outdoor at/in all buildings, streets,

ways, places, structures, etc. incl. sub-distributions, earth-leakage circuit-breakers, etc.;

Complete medium voltage-, low voltage-, communication-, signalling-cable-systems and wir-

ing, incl. all connecting, mounting, routing, labelling and testing, etc. for the WWTP structures.

Telephone and telecommunication system for the WWTP, incl. all co-ordination and technical

clarification with the responsible telephone company; all telephone instruments, exchanges, etc.;

Complete fire alarm systems, security systems, etc. for WWTP structures;

Complete earthing, lightning and over voltage protection and potential-equalisation-systems,

etc. for the new MEICA equipment of the WWTP and diversion structures.

3.1.2.6 Provisional Time Schedule

The following provisional time schedule shall be considered for the completion of the Works:

The completion period for all works under the Contract shall be twenty four (24) months.

Operation supervision of the WWTP for one (1) month after issue of the Taking Over Certific-

ate;

Defects liability period shall be twelve (12) months under the Contract. The above one month

operation supervision included in these 12 months. Additional 12 months shall be considered under the Serbian law.

The duration and sequence of the various activities making up the works may be varied by the Contractor to suit his own proposals for carrying out the works, subject to the approval of the Su-pervisor, under no consideration to extend the contract completion dates.

ItemIndicative period from the Commencement Date

Comments

Contractor’s Preliminary design 4* months

For full-scale WWTP to be ap-proved by the Supervisor and by the competent Serbian Authorities in accordance with the Serbian Law on Planning and Construction

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Contractors Final design 6 months

The design shall be prepared and reviewed fully in accordance with provision of the Serbian Law on Planning and Construction.

Contractors Detail design for Ex-ecution of the Works

7 monthsFor full-scale WWTP to be ap-proved by the Supervisor

*- In case that the Preliminary Design prepared by the Contractor deviates considerably from the technical

solution presented in the tender (which is generally in accordance with the existing Preliminary Design), the

Contractor’s Preliminary Design may be subject to new review and approval by the National competent au-

thorities (in accordance with the Law on Planning and Construction). In that case extra time (estimated at 1

month) needed for new review, approval and permitting processes should be taken into account by the

Contractor.

The pre-commissioning tests (test period) will be carried out in accordance to Sub-clause 3.1.11.2 when all civil, mechanical, and electrical and control components and functions are fin-ished, tested dry, found in compliance with the contract conditions.

The commissioning tests will be carried out in accordance to Sub-clause 3.1.11.3 when all civil, mechanical, and electrical and control components and functions tested wet, found in compliance with the contract conditions.

The trial operation and commissioning shall be made in two steps: one for water treatment, and the other for sludge treatment facilities. It will consist in the time where the biological process will develop itself, where all process parameters will be adjusted. This period will be finished after the completion test, which is a 7 days observation of plant running with the analysis of all parameters once a day.

After the completion test for wastewater treatment is validated, the trial period for sludge treat-ment facilities shall start. It takes place in the period of adjustment of all process parameters. This period will be finished after the completion test, which is a 7 days observation of plant running with the analysis of all parameters once a day.

After approval of Supervisor, the plant can be formally handed over to Beneficiary.. The provi-sional work programme is shown on the next page.

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3.1.2.7 Operation of the Facilities

It is envisaged that the new plant facilities will be attended normally during 5 days per week and 8 hours per day. The sludge dewatering facilities shall be operated in two shifts per 8 hrs. each. During the remaining hours the Facilities shall be manned with the minimum personnel required for on the job safety standards.

The design of the Works must be suitable for 24 hours per day continuous operation and ex-treme climatic conditions that could occur in the region, and ensure that the maintenance re-quirements of the Plant are minimal. The Contractor may be called by the Supervisor to demon-strate this for any component of the Plant proposed in his design, by service records and other technical data of such components installed in a similar working environment.

3.1.2.8 Plant Operation and Training

During Design phase, the contractor shall consider as maximum for operating cost for the WWTP to be the indicator from his Tender proposed costs which have been considered into the bid price. The Contractor should guarantee that they can meet these targets and agree on. Pen-alties which will be given for failed targets which are based on Tests After Completion.

The Contractors scope of works includes training of the Beneficiary's personnel and the assist-ance (supervision) of operation of the WWTP for a period of maximum one month after issue of the Taking Over Certificate. Further details are outlined Sub-clause 3.1.12 of this Volume.

The objective of this service is to ensure that, following commissioning; the initial operation of the WWTP is established in an economic and professional manner.

The supervision of operating performance will primarily focus on the verification of Contractor’s staffing and work program, the performance of administrative tasks, the service delivery in view of process operation, process control, safety and emergency provisions, the performance of measuring, the effluent quality and effluent monitoring procedures, the keeping of operation re-cords, operation statistics as well as maintenance, stock and store registers. The result of his operating experience of the plant during the one-month operation phase shall furthermore in-clude the verification of the Contractors O&M manuals as appropriate.

3.1.2.9 Contract Limits

Contract limits and borders of deliveries are to be defined as follows, if not agreed otherwise:

The Site boundaries of the plot of the existing WWTP as marked on the cadastral map in Volume 5 is the area where the proposed plant shall be designed; Future extensions (second phase of additional 60.000 PE capacity including full tertiary treatment for N and P) shall be designed on the neighbouring plot, which is in process of acquisition by the Beneficiary.

In case the neighbouring plot is acquired during the Preliminary design stage, amendments to the original proposal can be agreed in terms of usage of the new available areas. Which amendment however would require approval by the relevant authorities and the timing for it should be taken into account in the time schedule for the implementation of the works.

The incoming sewerage pipeline to be extended with the new by-pass channel up to the fu-ture outlet point at the Site boundary of the ‘New’ treatment plant;

The feeder lines from the medium voltage station shall be extended to the new transformer station.



The incoming feeder lines of potable water up to the site.

The incoming feeder/connection lines of Telecom up to the connection point at/in the new Administration building;

The effluent discharge pipeline to the Becej-Bogojevo channel including a discharge struc-ture in the channel.

3.1.3 Technical Standards and Building Regulations

In accordance to Sub-clause 3.1.5.2 the Contractor shall ensure that his Design incorporates the following key principles:

All aspects of the Works shall be fit for purpose;

All mechanical, electrical, sampling, analysing, monitoring and communication measuring

and control equipment required for any part of the plant treatment process shall be provided for any number of process flow streams proposed by the Contractor;

The continuous discharge of the existing incoming sewerage system shall be functional till

completion period. Cost of operation will be directly covered by Beneficiary.

For all required works and services specified in this Tender Dossier, the relevant Serbian standards and codes of practice shall apply. In any case, if Serbian standards are more strict or dominant, they shall apply to replace other standards given or not in other parts of this document.

For works and services where no relevant Serbian standard or codes of practice exists, the latest generally accepted European Standards and code of practice shall be applied.

The proposed application of other standards and code of practice for certain works and/or services shall be such as to ensure higher than specified quality and safety of works, and to facilitate operation, inspection, maintenance and alike.

In any case, it is required to state standards and code of practice to be used for each service and work, accompanied with explanations to demonstrate to the satisfaction of the Super-visor that application of these standards and code of practice shall give required quality, safety, functionality and durability of works and completed WWTP.

The design and construction of the Works shall be in accordance with these Technical Require-ments and shall comply with the requirements of the latest editions of generally accepted European Standards and codes of practice such as harmonised National, German or British Standards, and any other Standards referred to. It shall be such as will facilitate operation, in-spection, cleaning, lubrication and repair of the various components of the Plant. Furthermore, such design and construction shall ensure that the design life specified in Sub-clause 3.1.5.2.1 of these Supervisor's Requirements for each component of the Plant in the Performance Spe-cification will be attained, and that such components operate satisfactorily under all service con-ditions.

Wherever reference is made in the Contract to specific standards and codes to be met by the goods and materials to be furnished, and work performed or tested, the provisions of the edition or revision of the relevant standards and codes in effect 28 days prior to the latest date for sub-mission of tenders shall apply, unless otherwise expressly stated in the Contract. Where such



standards and codes are National, or relate to a particular country or region, other authoritative standards which ensure an equal or higher quality than the standards and codes specified will be accepted subject to the Supervisor’s prior review and written approval. Differences between the standards specified and the proposed alternative standards must be fully described in writ-ing by the Contractor and submitted to the Supervisor, in the English language, at least 28 cal-endar days prior to the date when the Contractor desires the Supervisor’s approval. In the event the Supervisor determines that such proposed deviations do not ensure equal or higher quality, the Contractor shall comply with the standards specified in the documents.



3.1.3.1 SI-Units

SI units (Système International d'Unités) of measurement shall be used throughout this Con-tract. All calculations and technical information shall be in SI units.

The Contractor shall transfer all information and data originating in another system into the SI System.

3.1.3.2 Reference Standards

The Serbian standards shall be predominant and EU-Standards or other acceptable standards and codes in their latest Edition which satisfy also the harmonised National (Serbian) Standards shall be used throughout this Contract.

Authoritative are all standards that are valid at the location of the Plant during the time of imple-mentation.

The Contractor shall propose Standards for the execution of the Works, which shall be ap-proved by the Supervisor. For approval of the proposed Standard, the Contractor shall send a copy of the Standards with a translation into the English at least 28 calendar days prior to the date when the Contractor desires the Supervisor’s approval. The Contractor shall utilise ap-proved Standards, only.

In referring to the Standard Specifications the following abbreviations are used:

DWA/ATV German Water Association, formerly German Association for Water, Wastewater and Waste

BS British Standard

BSCP British Standard Code of Practice

CE CE Certificate acc. to EU Directive 2001/95/EG

CEE International Commission of Rules for the Approval of Electrical Equipment

CESMM Civil Supervisoring Standard Method of Measurement, GB

CESWI Civil Supervisoring Specification for the Water Industry, GB

DIN Deutsches Institut für Normung e.V. - German Institute for Standardisation

DVGW Deutsche Vereinigung des Gas- und Wasserfachs e.V. - The German technical and scientific organisation on Gas and Water

EN European Standards

FIDIC Fédération Internationale des Ingéniieurs-Conseils, Geneva

IEC International Electrotechnical Commission

ISO International Organisation for Standardisation

SIS Sveriges Standardiserings Kommission (Swedish Standard Commission)

STAS Standard de Stat (Asociaţia Română de Standardizare, ASRO)

TS Serbian Standard, to be applied in harmonised editions, only

USBR United States Bureau of Reclamation

UVV Unfall-Verhütungs-Vorschriften (Regulations of Accident Prevention)

VDE Verband Deutscher Elektrotechniker – German Association for Electrical, Electronic & Information Technologies

JUS Jugoslav Standards



The Contractor shall supply and maintain in his office on the site at least one complete set of all Standard Specifications referred to in the Contract. In addition, one set shall be made available for the use by the Supervisor Team.

3.1.3.3 Standards of Material and Standards of Workmanship

Except where otherwise specified, all materials and workmanship shall comply with the require-ments of the latest editions of European, Serbian and German standards and codes of practice and any other Standards, which are referring to the Specifications but are superior to the Ser-bian standards and regulations. A list of the Standards is included in Section 3.1.14.1.

The Standards and Codes shall be current at 28 days prior to the first date set for the delivery of Tenders. If necessary equivalent National Standards may be substituted for the Standards re-ferred to in the Specifications provided the Contractor should have justified such substitution to the Supervisor. These Standards shall only be applied after written approval has been received from the Supervisor.

3.1.3.4 Standards on Site

The Contractor shall purchase and keep on site at least one copy of each of the Standards, Codes and manuals or approved National Standards, which are referred to in the Specifications. In addition the Contractor shall keep on site a copy of any other Standard, Code or Manual or National Standard, which applies to materials supplied.

Copies of the standards shall be available any time for reference at the office of the Supervisor. If the Supervisor requires an English or Serbian translation of any of the Standards or Manuals the Contractor shall provide a typed copy of the translation within 7 days of receiving a written request from the Supervisor.

The Cost providing all the Standards mentioned and Standards required during the execution of the Works shall be included in the rates and prices and no payment will be done to the Con-tractor for these.

3.1.3.5 Matters not covered by Standards

Any materials and workmanship not fully specified herein or covered by the Standards, Codes or Manuals, shall be of such type and quality so as to produce a first class work. In such circum-stance the Supervisor shall determine whether all or any of the materials offered or delivered to the site are suitable for use in the Works and the Supervisor’s decision in this respect shall be fi-nal and conclusive.

3.1.3.6 Abbreviations and Terms

CESWI “Civil Engineering Specification for the Water Industry”, 5th Edition” published by UK-WIR Ltd., WRc plc, Franklin Road, Blagrove, Swindwon, Wiltshire, SN5 8YF

Day Calendar Day

Month 30/31 Calendar Days

mASL Meters above mean Sea Level, definition of the altitude

MSDS Material Safety Data Sheet

P.E. Population Equivalent



3.1.3.7 Reliability and Redundancy of Installations

The Facilities shall be designed with a high grade of flexibility and reliability of the different parts. Therefore all items controlling the process (main equipment, power supply and distribu-tion systems, control panels and centres, data processing systems, etc) shall be designed with a sufficiently high degree of redundancy (by means of installed spare capacity and/or spare units of equipment), enabling to overcome without problems, all normal maintenance situations and local calamities due to temporary malfunctioning (or non-functioning) of main mechanical and electrical equipment and civil constructions.

3.1.3.8 Standardisation of Equipment

Whenever possible, the Contractor shall provide equipment of a similar nature from the same manufacturer, e.g. electric motors. Standardisation of types of equipment, such as pumps, mix-ers, valves, instruments, shall also be adopted.

The Contractor shall note that particular attention will be paid to these requirements. In cases where the proposed equipment is not standardised with regard to manufacturer and type, the Contractor shall be required to provide conclusive technical justification; considerations of price alone will not be accepted. Equipment and components that have not been standardised will not be approved.

The names of the manufacturers of Materials and Plant proposed for incorporation in the Works together with performance characteristics, capacities, certified test reports and similar informa-tion of proposed Plant, shall be furnished at the specified times or when requested by the Su-pervisor. If in the Supervisor’s judgement, the provision of such Materials and Plant is unsatis-factory because they are not in compliance with the standards and codes listed in the Perform-ance Specification, then the Supervisor shall have the right to reject such proposed manufactur-ers.



3.1.4 General Requirements

3.1.4.1 General

3.1.4.1.1 Information on Site Conditions and Subsurface Information

The Contractor shall ascertain all conditions relevant to the Works.

3.1.4.1.2 Temporary Fencing and Marking of Sites

The Contractor shall provide, maintain and remove on completion of the Works any temporary fencing around the site and he shall operate appropriate security measures on access roads, but without prejudice to his obligations such as maintenance of free access for the Supervisor, the Supervisor and any other persons entitled to such access.

All open excavations shall be protected sufficiently to ensure the safety of workmen and to keep out the public and livestock.

3.1.4.1.3 Signboards

The Contractor shall, at his own expense, provide and install signboards at the site of work and shall remove the same on completion.

A project signboard will be required at the main Sites. However, the Contractor shall erect a pro-ject signboard at the Main Site Office. This signboard shall be free standing or attached to the building as allowed by relevant Public Authorities. The Contractor shall obtain instructions from the Supervisor regarding information to be displayed on the signboard. They will be in accord-ance to the EUD regulations. Signboards and commemorative plaques have to be provided and erected by the Contractor at the entrance of the WWTP and at the corner of the access road to the WWTP and the main road. The dimensions and text on the board shall be as per the re-quirements in the “Visibility Guidance” point 3.7 which can be found published on the http://ec.europa.eu/comm/europeaid/visibility/pdf/europeaid_guidelines_en.pdf including the title of the Contracting Authority, Beneficiary, Supervisor and the Contractor. For further guidelines also refer to http://www.ec.europa.eu/regional_policy/sources/docoffic/official/regulation/pdf/ispapuben.pdf

3.1.4.1.4 Billposting and Advertising

The Contractor shall not undertake or allow billposting or advertising of any kind upon the Works without the written consent of the Supervisor.

3.1.4.2 Electricity, Water, Gas and Other Services Available on the Site

At present supplies of electricity, water and sewerage, is available on the site.Telephone is not available on the site.

The Contractor is to make his own arrangements for the supply of electricity, water, telephone and sewerage until such time as the permanent works are available for use.

3.1.4.2.1 Electricity and Lighting

The Contractor shall provide and maintain wherever required adequate supplies of electricity at a suitable voltage and compressed for all operations to be undertaken to complete the Contract.


http://www.ec.europa.eu/regional_policy/sources/docoffic/official/regulation/pdf/ispapuben.pdf

http://www.ec.europa.eu/regional_policy/sources/docoffic/official/regulation/pdf/ispapuben.pdf

http://ec.europa.eu/comm/europeaid/visibility/pdf/europeaid_guidelines_en.pdf


The Contractor shall also make these services available to subcontractors and, when instructed by the Supervisor, to other contractors and employees of the Supervisor.

The Contractor shall be responsible for entering into any agreements with the appropriate sup-pliers, and shall issue all notices and pay all fees, dues, rents, charges and other costs incurred thereby.

The Contractor shall, in connection with such supplies, adopt precautions to ensure the safety of all personnel.

The Contractor shall provide adequate lighting for the proper execution and inspection of the works. If the Supervisor considers the intensity of lighting to be inadequate for the proper execu-tion and inspection of the work being undertaken of the Contractor shall install such additional lighting as the Supervisor may be require.

The minimum standard of temporary lighting required in all structures, culverts, underground chambers and the like shall be one 200 watt bulb to every 8 meters length. Such lighting shall be maintained throughout the Contract until the end of the Defects Liability Period or until an al-ternative date as may be agreed to by the Supervisor.

3.1.4.2.2 Water Supply and Sanitation

The Contractor shall provide wherever required adequate supplies potable and service water of proper quality and pressure for all operations to be undertaken to complete the Contract. The Contractor shall also make these services available to subcontractors and, when instructed by the Supervisor, to other contractors and employees of the Supervisor.

The Contractor shall be responsible for entering into any agreements with the appropriate sup-pliers, and shall issue all notices and pay all fees, dues, rents, charges and other costs incurred thereby.

The Contractor shall clean as necessary and maintain the site in a hygienic condition and shall comply with the equipment of the Safety Officer appointed by the Supervisor and any instruc-tions of the Supervisor.

The Contractor shall provide, maintain and remove at the end of the Contract or when directed by the Supervisor, adequate toilet facilities including flushing toilets, hot water and showers for the use of his own staff and that of the Supervisor adjacent to or as part of their site offices and additional suitable facilities in various parts of the site as necessary for the use of his workmen.

3.1.4.2.3 Communication

The Contractor shall provide and maintain adequate communications around the site. A tele-phone network internet connected with the telephone service required by the Supervisor shall serve principal offices, installations and site facilities. If the Contractor supplements the tele-phone network with a radio communications network he shall allow the Supervisor reasonable use of the facility.

3.1.4.3 Phased Possession and Right of Access to the Site

Right of access and possession of all parts of the site shall be within the duration of the works implementation as stated below.



3.1.4.3.1 Access Roads

The Contractor shall, at his own expense, carry out all protective works and strengthening of public streets and roads used by him as necessary to avoid damage from heavy loads and plant moved to the site. He shall also construct, maintain and remove temporary access roads as he may require for carrying out the works at his own expense. The Contractor shall observe all re-strictions, which apply to public roads. He shall comply with all reasonable restrictions, which may be imposed by the Supervisor, the Supervisor, the Police or other competent Authorities.

Public and private streets, roads and other surfaces used by the Contractor shall be kept free from dirt and rubbish and be cleaned as required by the Supervisor. Immediately after ceasing the use of any temporary road the Contractor shall restore the road to the satisfaction of the Su-pervisor and the responsible Authority or the Owner.

3.1.4.3.2 Temporary Access

The Contractor shall provide and maintain all footways and structures necessary for the pur-poses of the Contract. On completion of the works, unless instructed otherwise by the Super-visor, the Contractor shall remove such footways and structures and restore the ground to the satisfaction of the Supervisor.

The Contractor shall provide and maintain all temporary gangways, ladders and staging on and about the Sites necessary for the purposes of the Contractor and shall remove such gangways, ladders and staging when no longer required.

3.1.4.3.3 Traffic Arrangements

Traffic diversions, if necessary, shall be planned and arranged with the responsible Authorities by the Contractor and harmonised with the Supervisor and the Supervisor. No diversion shall be implemented without the written consent of the responsible Authority and after given information to the Supervisor and the Supervisor. Access to the site shall be available to vehicles of emer-gency services and residents in the areas.

The Contractor shall provide, erect and maintain on the sites and at locations on the access to the sites all traffic signs and traffic control signals, as necessary and/or may be required by the Police Authority for the safe direction and control of the traffic. The location and size of all such signs and the lettering thereon shall be approved by the Supervisor before erection of the signs. The Contractor shall reposition, cover or remove signs as required during the progress of the works.

3.1.4.4 Dealing with Water/Maintenance of Flow

The Contractor shall be responsible for dealing with water, whether from existing watercourses, surface water and storm water, drainage systems ground water, underground springs or any other source or cause. In discharging and diverting water he shall avoid flooding or damaging other works or services, causing erosion and polluting watercourses.

The Contractor shall provide all temporary works and do all things which may be necessary to maintain those parts of the existing water supply, sewerage, and drainage systems and water courses which may be affected by his operations in a condition not less satisfactory than they were prior to the commencement of the works and shall maintain the normal flows therein at all times until the connections to the new system shall have been made except when written per-mission to interrupt the flows has been obtained from the Supervisor.



The Contractor shall submit to the Supervisor his proposal accompanied with a schedule for maintaining the flow in the water supply, sewerage, and drainage systems and water courses affected by the Works and the works necessary for making the connections to the new system where ever applicable. The Contractor’s method proposed for each location shall be subject to the approval of the Supervisor. Such approval will not relieve the Contractor of his obligations under the Contract.

The Contractor shall perform all works for maintaining flow in existing water supply, sewerage, and drainage systems and water courses including but not limited to the construction of diver-sion systems and relocations and other works necessary during the construction period includ-ing the removal and dismantling of such works on completion as required by the Supervisor.

Costs for operation of the old PS will be covered by the Beneficiary.

The Contractor shall as required by the Supervisor keep excavations free from water and sewage whether caused by floods, storms or otherwise so that the works shall be constructed in dry conditions.

Unless otherwise specified the Contractor shall furnish, install, maintain and operate all neces-sary pumping and other equipment for de-watering the various parts of the works and for main-taining the foundations free from water as required for construction of each part of the works.

The Contractor’s method of removal of water from the foundations will be subject to the ap-proval of the Supervisor. Where excavations for foundations of structures extends below the groundwater table, the portion below the water table shall be de-watered in advance of excava-tion unless specified otherwise.

The de-watering shall be accomplished in a manner that will prevent loss of fines from the foundation, will maintain stability of excavated slopes and the bottom of the foundation, will res-ult in all construction operations being performed free from standing water, unless otherwise specified, and will result in all foundations being sufficiently dry for proper bonding of the backfill materials with the foundations and proper compaction of the materials placed.

The Contractor will be required to control any seepage along the bottom of the foundations and elsewhere prevent the accumulation of the standing water. Generally de-watering at foundations shall comply with the requirements of DIN 4095 or equal.

3.1.4.4.1 Storm Water Protection

The Contractor shall be responsible for dealing with storm water, whether from normal or ex-traordinary rainfalls and weather conditions or any other source or cause. In discharging and di-verting water he shall avoid flooding or damaging other works or services, causing erosion and polluting watercourses.

In addition to Sub-clause 3.1.4.4 the Contractor shall perform all works for maintaining of storm water flows and shall as required by the Supervisor keep excavations free from water and sewage whether caused by tides, floods, storms or otherwise so that the works shall be con-structed in dry conditions.

Unless otherwise specified the Contractor shall furnish, install, maintain and operate all neces-sary pumping and other equipment for storm water protection and de-watering the various parts of the works.



3.1.4.4.2 Existing Underground Utilities/Structures

The Contractor shall be responsible for the location of existing underground utilities and other structures (foundations, walls, archaeological findings, etc.), which will be affected by his work. He shall take all necessary steps to inform himself and the Supervisor and Beneficiary and other Authorities responsible for water, sewerage, electricity and communications and from private companies the location of underground utilities / structures.

The Contractor has (for his own safety) take care about any buried power cables, gas lines or pipes. He shall locate these utilities /structures sufficiently in advance of his construction opera-tion and use modern detection equipment, satisfactory to the Supervisor, allowing to minimise the risks to damage or to interrupt the underground utilities/structures. The Contractor will be held responsible for maintaining these utilities and shall repair without any delay any damage caused by his operations at his own expense.

No excavating machines shall be used in the immediate surroundings of cables and/or pipelines unless approved by the Supervisor. Special care shall be taken to ensure that the existing facil-ities are accessible in the case of an emergency.

Temporary works which have to be made in the vicinity of the existing facilities during the exe-cution of the works shall be maintained by the Contractor and shall be removed as soon as practicable. Before works are started that might effect or damage neighbouring structures the contractor has to have prepared a “Record of Evidence” by experts about the condition of the structure. This expertise should include photographs to approve any defects of the structure be-fore the execution of the works.

3.1.4.4.3 Maintenance / Diversion of Existing Utilities

The Contractor shall be responsible for maintaining all such utilities/structures encountered by him in the construction of the works and shall bear the cost of making good any damage caused directly by his activities.

The Contractor shall indemnify the Beneficiaries and shall be responsible for all claims whatso-ever arising from any damage, injury etc. caused to the services as a result of his construction activities associated with this Contract.

3.1.4.5 Contractor's Equipment

Details of all Contractors’ Equipment to be used by the Contractor in the execution of the Works shall be submitted to the Supervisor prior to its use.

The Supervisor's consent to use the Contractor's Equipment will not be unreasonably withheld, but if in the Supervisor's opinion circumstances arise which make it desirable that the use of the Contractor's Equipment should be suspended either temporarily or permanently, the Contractor shall change the method of performing the work affected and he shall be deemed to have no cause for claims against the Supervisor on account of having to carry out the work by another method, nor shall he be deemed to have cause for claim if any order issued by the Supervisor results in the Contractor's Equipment having to stand idle for a period of any duration whatso-ever or having to be removed.

In particular, where it is impossible due to the proximity of, and danger to, existing roads, struc-tures, or services, to excavate except by hand methods, then in such cases it shall be deemed



reasonable for the purpose of this Clause for the Supervisor to withhold consent to use the Equipment.

The Contractor shall provide, erect, service and maintain all necessary buildings as offices, housing or plant yard/stores for himself, his staff and his employees. These buildings shall, from the time of their erection until the completion of the Contract, be the property of the Supervisor and the Contractor shall not demolish or remove any buildings or part of any buildings without the written permission of the Supervisor.

All buildings shall comply with the local regulations or generally accepted standards, and the Contractor shall maintain approval of the appropriate Authority prior to construction. The Con-tractor shall also construct and maintain adequate roads or paths to all buildings.

All hutments, buildings, fixtures and fittings provided under this Clause shall be removed and the site reinstated at the end of the Contract, the site is to be left either gravelled or grassed. As instructed by the Supervisor

3.1.4.6 Public Convenience

3.1.4.6.1 Environmental Constraints

The construction of the WWTP will cause some environmental impacts, which should be minim-ized. (see also Sub-Clause 3.1.5.2.4).

The quality of the receiving water body after the discharge point will be improved with the exe-cution of the project. The Contractor shall be responsible for minimizing the negative environ-mental impact (or the potential likely to involve endangering elements of the environment) dur-ing construction and operation of the plant.

The Contractor shall comply with the local and National requirements and the issued permission for construction. The Contractor shall be legally responsible and financially liable to observe Na-tional environmental legislation.

The following environmental protection measures shall be observed during the execution of the construction of the WWTP.

Demolition material

Reuse of demolition materials as backfill for trenches and excavations or/and hard fill for con-struction foundations and roadways is possible, unless contaminated or hazardous materials such as asbestos are identified. The Contractor will be responsible for environmental sound disposal of any material resulting from the demolition and other site materials under permis-sion from the relevant local Authorities and shall be disposed of in a licensed tip.

Excavated soil

Reuse of excavated natural soil, which is free of cohesive components, salt, sulphate and/or clay materials as backfill for trenches and excavations. The Contractor will be responsible for environmental sound disposal of surplus materials under permission from the relevant local Authorities.

Ground water

With reference to Geotechnical Investigations Report enclosed in Volume 5, the ground wa-ter table is below top of the ground level. Temporary and/or permanent groundwater lowering will be required for deep foundations, basement of tanks and trenches during construction to



proceed. The Contractor will be responsible for ensuring of these measures, as well as day- and surface water discharge.

Air pollution

Construction may give rise to dust and vehicle exhausts. Due note is to be taken of the prox-imity of residential housing to the WWTP and Sewer connection works. The normal health and safety controls will be required to safeguard construction and the residential and passing population.

Noise pollution

Construction may cause annoyance caused by noise. The normal health and safety controls will be required to safeguard construction and the residential and passing population.

3.1.4.6.2 Prevention of Noise and Disturbance

The Contractor shall comply with the local and National requirements and the issued permission for construction. The Contractor shall be legally responsible and financially liable to observe Na-tional environmental legislation.

Noise and disturbance shall be kept to the reasonable minimum as far as required for this pro-ject. The Contractor’s attention is drawn to the close proximity of some working sites to build-ings in continuous use. All plant and tools used at such sites above or near ground level shall be silenced or of a silent type.

The Contractor shall take all necessary steps to ensure that his workmen carry out their duties in a quiet manner particularly when working at night.

The Contractor shall obtain the Supervisor’s consent to the details and arrangement of all plant before installation. All plant shall be kept in good condition and safe working order. Operation of any particular item of plant shall be stopped whenever, in the opinion of the Supervisor, it is causing unreasonable noise or disturbance. The Contractor shall immediately take steps to eliminate such noise or disturbance or replace the plant.

Where compressors or generators are to be used for less than one-month suitable baffles or other provisions to reduce noise emission shall be provided with suitable acoustic baffles to re-duce the emission of noise. Acoustic screening shall be provided for outside plant equipment to the satisfaction of the Supervisor.

The Contractor shall perform take noise intensity readings as required by the Supervisor and shall submit the results to the Supervisor. The Contractor shall comply with any additional measures required by the Supervisor to keep noise and disturbance, e.g. odours (see 3.1.5.2.4) to the minimum.

3.1.4.6.3 Traffic Arrangements and Access

The Contractor shall as far as required, comply with all requirements and recommendations of the Police and Authorities regarding traffic arrangements and road safety measures on public roads outside the WWTP site.

The Contractor shall if needed, provide all barriers and traffic signs approved by the Supervisor.

3.1.4.6.4 Storage of Equipment and Materials in Public Streets

Construction materials and equipment shall not be stored outside the site of the WWTP.



After placing of the back-fill, all excess material shall be removed immediately from the site.

3.1.4.6.5 Cleanliness of Public Roads

The Contractor shall minimise pollution of public roads. The Contractor shall take all measures to keep all public roads clean of any spillage or droppings from his own and his sub-contractor’s vehicles travelling to and from the site. All such spillage or droppings shall be immediately cleared to the satisfaction of the Supervisor and appropriate Public Authority.

The Contractor shall indemnify the Supervisor against all claims by the third parties, which may arise out of the Contractor’s failure to comply with this Section.

3.1.4.6.6 Cleanliness on Site

The Contractor shall make every effort to keep the site tidy and in orderly manner and to take at any time every possible precaution against the contamination of subsoil and groundwater. The Contractor shall be responsible for making all arrangements for the disposal of solid and liquid wastes from the site. Furthermore, he shall give strict instructions to all persons employed by him to use the sanitary accommodation provided at site.

3.1.4.6.7 Pollution Prevention

The Contractor shall not pollute or unnecessarily disturb lands, roads and other places on and around the Site. No trees or other vegetation shall be removed except to the extent necessary for the Works.

The Contractor shall take all reasonable precautions to prevent:

Silting, erosion of beds and banks and pollution of rivers and watercourses;

Interference with the supply to or abstraction from underground water sources;

Pollution of the surface waters at site.

The Contractor shall provide, maintain and remove on completion of the works, settling lagoons and other facilities to avoid pollution caused by the Contractor's operations such as but not lim-ited to quarrying, aggregate washing, concrete mixing and grouting.

3.1.4.7 Health & Safety

The Contractor shall use his best endeavours to ensure, so far as is reasonably practicable and to the satisfaction of the Supervisor and Supervisor, the health, safety and welfare at work of his employees including those of his subcontractors and of all other persons on the site.

The Contractor shall comply with the requirements of European Directives 92/57/EEC dated 24.06.1992 and 89/391/EEC dated 12.06.1989 and Serbian law concerning the Health and Safety Protection and all relevant national health and safety regulations.

3.1.4.7.1 Safety – General

The Contractor shall execute the works in a manner complying with the best European or Na-tional Safety Regulations and Standards.

Should be Supervisor consider the Contractor’s method of working unsafe or that there are in-sufficient or inadequate safety barriers or other devices or that there is insufficient safety or res-cue equipment, the Contractor shall change his method of working or install or strengthen safety



and rescue equipment if so instructed. Such instructions shall not relieve the Contractor of any of his responsibilities under the Contract.

The Contractor shall notify the Supervisor immediately any accident that occurs, whether on site or off site, in which the Contractor is directly involved, and which resulted in any injury to any person whether directly concerned with the site or a third party. Such initial notification may be verbal and shall be followed by a written comprehensive report within 24 hours of the accident.

Transportation of any material by the Contractor shall be in suitable vehicles, which do not cause spillage when loaded, and all loads shall be suitably secured. Any vehicle shall be re-moved from the site, which does not comply with this requirement or any of the local traffic regu-lations and laws.

The Contractor has to enable access to sites at any time to any external institutes or experts carrying out safety inspections.

3.1.4.7.2 Safety in Sewers and at Sewage Works

The recommendations contained in the booklet ”Safety in Sewers and at Sewage Works” pub-lished by the Institution of Civil Supervisors, London, shall be adhered to in respect of all work in operational sewers, pumping stations and wastewater treatment plants.

The Contractor shall make all necessary arrangements with the appropriate authority before en-tering in or working on existing sewers and associated works.

3.1.4.7.3 Safeguarding Equipment

The Contractor shall install and maintain adequate provisional safeguarding equipment as handrails for all platforms, unsecured ceilings and gangways of scaffoldings and high formwork elements, accessible tops of high walls and stairways for all temporary and permanent Works. Life belts, swimming belts and rescue bars for open basins are to be provided, accordingly.

3.1.4.7.4 Accidents, Extraordinary Events

The Contractor shall give immediate written notice to the Supervisor of any accident or ex-traordinary event occurred on the work site giving details of the same whether or not such an accident or event affects the progress of work. The Contractor is also obliged to report on any measure taken.

National and internationally accepted safety standards shall be strictly considered. A security plan, which includes the relevant standards, shall be submitted to the Supervisor for approval before commencement of the works.

3.1.4.7.5 Fire Prevention

During the performance of the Contract the Contractor shall make arrangements to the satisfac-tion of the Supervisor for the protection of the permanent works and any temporary works and any adjacent property from fire and, if required, he shall give the Fire Authority admittance to all facilities periodically to inspect the fire prevention arrangements.

Particular care must be exercised in connection with the operation of electric arc welding equip-ment, oxyacetylene cutting equipment and other processes involving the use of naked lights. Special arrangements will be necessary for the storage of highly flammable liquids on the site.



The Contractor shall remove all rubbish and material of a flammable nature and take such other steps as the Supervisor may require but this shall not relieve the Contractor of any of his obliga-tions under the Contract.

3.1.4.7.6 Lighting and Electric Power

The Contractor shall provide and maintain efficient temporary lighting and power supplies for all parts of the works as may be necessary and shall, in connection with such supplies, adopt pre-cautions to ensure the safety of all personnel.

The Contractor shall provide adequate lighting for the proper execution and inspection of the works. If the Supervisor considers the intensity of lighting to be inadequate for the proper execu-tion and inspection of the work being undertaken the Contractor shall install such additional lighting as the Supervisor may be require.

Such lighting shall be maintained throughout the Contract until the end of the Contract Period or until such alternative date as may be agreed with the Supervisor.

3.1.4.7.7 Equipment Safety

The Contractor is obliged by his signature to supply the machines, devices, pieces of equipment and the like complete with the safety protection required for accident prevention according to regulations of the local accident insurance associations or trade associations.

3.1.4.7.8 Security

The Contractor shall, at his own expense, case up and suitably protect all work liable to injury, either by the weather or by the method adopted for the execution of the Works and take all pre-cautions against the contamination of the works.

3.1.4.8 Levels and Benchmarks / Setting out of the Works

3.1.4.8.1 Levels and Benchmarks

The works shall be set out and tied to the local National Co-ordinate System. Except where oth-erwise specified all levels shall be in meters above mean sea level (m.a.s.l.) with accuracy of three decimals. The Contractor shall supply to the Supervisor details of the value and location of the temporary benchmarks and reference points that he proposes to use.

The Contractor shall, before construction commences, establish from the reference point’s and benchmark’s, an adequate system of control points and benchmarks at suitable locations on the site of the works, which shall be clearly marked, adequately referenced and properly recorded. Temporary benchmarks and survey stations shall, unless otherwise approved, be located clear of the construction works.

The Contractor shall establish, construct and project during the period of construction of the Works necessary additional benchmarks, which shall be checked periodically. The Contractor shall be solely responsible for carrying out these operations. He shall make the control points and benchmarks available to the Supervisor and the Supervisor together with the relevant re-cords.

The Contractor shall submit to the Supervisor for approval drawings in duplicate showing the locations and levels or co-ordinates as appropriate of each and every temporary benchmark and survey station used for the setting out of the works.



The Contractor shall be responsible for constructing the works in accordance with the data on levels, benchmarks and other points of reference in the vicinity of the site(s) if they are not shown on the drawings.

3.1.4.8.2 Setting out of the Works

The Contractor shall before commencing execution of any given section of the Works submit to the Supervisor complete setting out details with supporting calculations and drawings (including drawings showing the locations and co-ordinates of the reference points used) in duplicate for approval.

The Contractor shall identify setting out dimensions for all structures by the relating them to ex-isting works and by interpretation of the drawings.

The locations of structures to be constructed as part of the works shall be identified by refer-ence to steel pins set in concrete or other approved markers set up by the Contractor, who shall also determine the co-ordinates of the markers and their distances from adjacent existing struc-tures.

The Contractor shall set out sections of the works at such times as may be directed by the Su-pervisor to enable Utility Service Authorities to carry out temporary or permanent alterations to their equipment or buried services.

Data and information on levels, dimensions, alignments and gradients other than these to be determined by the Contractor when preparing his structural and detailed design drawings are shown on the drawings. Details not shown on the drawings shall be established by the Con-tractor during the execution of the works.

The Contractor shall employ well-qualified and experienced surveyors approved by the Super-visor for the execution of the survey work and setting out as described in the Contract. The sur-vey instruments to be used by the Contractor shall be of the modern type, suitable for the work to be executed and shall be maintained in a first class condition. The instruments and/or equip-ment shall be subject to the approval of the Supervisor.

For all survey instruments used in the works the Contractor shall submit recent calibration certi-ficates issued by competent authorities. Further calibration of the instruments shall be carried out every three (3) months. All field-books, calculations, maps, etc. of survey activities men-tioned above shall be handed over to the Supervisor immediately after completion of the survey work.

3.1.4.9 Other Contractors on the Site

Simultaneously with this Contract a separate contract will be carried out for rehabilitation and upgrading of the sewer network. The Contractor shall make appropriate allowance for liaison and co-operation with this and possible other Contractors of any utility providers (gas, electricity, water and telephone) which might interfere with the Works under this Contract. This refers in particular to the interface between the existing chambers and pipes and the new works and the signal transmitter of the storm water retention basin (constructed under the above mentioned contract).

In case it is necessary for other contractors employed by the Beneficiary, and employees of the Beneficiary to work on and around the site, such other contractors and employees may reserve areas for use. The Contractor shall not enter or use these areas without the prior written permis-



sion of the Supervisor, unless such entry is permitted elsewhere in the Contract, and shall not obstruct access to such areas without having provided an acceptable alternative access.

The Contractor shall not interfere in any way with any works, whether the property of the Super-visor or of a third party and whether the position of such works is indicated to the Contractor by the Supervisor or not. The Contractor shall respect the construction and finish of works and art-icles supplied or installed by others and will be held responsible for any loss or damage thereto if caused by him, his employees or his subcontractors.

3.1.4.9.1 Third Parties

The Contractor shall comply with all conditions stipulated in any permits granted by third parties, including conditions stipulated in those permits obtained by the Supervisor.

3.1.4.9.2 Subcontracted Works

The Contractor shall appoint licensed subcontractors who will certify all necessary Design Docu-mentation for revision of the Design by the authorized and appointed institution by the Benefi-ciary procession of the Construction Permit and the related documentation. These shall be spe-cialist subcontractors for all those parts of the work described herein for which he is not himself an experienced, recognised and approved Contractor.

The Contractor shall submit for consent, the names of all proposed specialist subcontractors and suppliers of special manufactured items with full details of local agents or, if local agents do not exist, the procedures for service and supply of spare parts and shall indicate the precise sections of the work for which each will be responsible.

The Contractor shall provide evidence that each firm undertaking manufacture or fabrication has satisfactorily executed work of a similar nature. In the case of work, which the Contractor pro-poses to manufacture or fabricate on the site, the Contractor shall provide evidence that he can satisfactorily execute the work.

The Contractor shall be solely responsible for the overall co-ordination of the Contract. Direct formal communication between his sub-contractors and the Supervisor will not be allowed.

3.1.4.9.3 Subcontract Orders

Before placing any order for manufactured or fabricated articles for the permanent works, the Contractor shall submit to the Supervisor for approval two copies of the following details for each item as relevant:

Names of the firms from whom he proposes to obtain such items together with places of

manufacture or fabrication;

A description of the items to be supplied with manufacturer's specification together with a de-

scription of quality, grade, weight and strength;

Manufacturers "type" test certificates, or recent test results carried out on similar items, i.e.

CE-certification, certificate of origin, etc.

When requested by the Supervisor, the Contractor shall submit samples of such items to the Supervisor for approval. The submission of details and samples under this Clause shall not re-lieve the Contractor from any of his responsibilities under the Contract.



Copies of all orders for all major plant items, materials and subcontract works placed with sup-pliers and subcontractors shall be provided in triplicate to the Supervisor in English language. The orders shall give or shall be accompanied by full details and drawings of the materials, equipment or work ordered.

3.1.5 General Design Requirements

Particular design requirements are outlined in Volume III Section 2 Design & Process Require-ments. In addition the following general information’s shall be taken into consideration.

3.1.5.1 Site Information’s

The following general information’s are PRELIMINARY! The Contractor shall review and assess these general information’s and shall gather all additional information’s by his own investiga-tions and due to his own responsibility.

3.1.5.1.1 Location and Area of the WWTP

The CWWTP is to be situated at the outskirts of the urban town area of Vrbas in accordance with the General plan and aforementioned technical documentation. The location of the future plant will be on the premises of the existing treatment facilities which occupy an area of around 2ha. The plot location is confirmed by the town planning documents (detailed urban regulation plan) adopted during 2007. Due to limited area, existing out of date facilities will be abandoned and demolished, providing free area for construction of the CWWTP. The sludge drying beds and all optional or future parts shall be planned at the extension of the adjacent lot as set out in the detailed urban regulation plan.

A total area of the existing WWTP is approx. 2.4 ha, whereas an area of 1.1 ha is planned to be acquired for the sludge drying beds, digestion of sludge and any future extensions.

The maximum level of the water in the recipient is reported at -1.5 m below the top ground level at site which corresponds to approx. 79.30 m.a.s.l. Any flood protection measurements shall not be taken into account by the Contractor.

3.1.5.1.2 Meteorological Data

The climate of the project area is continental temperate, with some influences from the eastern continental and northern boreal climates, featuring frost and snow storms during winter and cold rains during spring and autumn.

The prevailing wind directions are from the south and the northeast ; the NW-SE orientation of the valley and terraces enhances the perceived effects of temperature changes, due to dew point and wind chill factors.

Temperature variations occur especially during the hot and cold seasons, with both extremes of the temperature range (frost in winter and high temperature and humidity in summertime) being present in the project area.

Rainfall in the project area, amounted to an average of 600 mm,



3.1.5.1.3 Topography

The site of the WWTP is flat and terrain slopes very slightly towards the recipient channel. The altitude of the essential part of the site is around 81.00 m.a.s.l.

A preliminary survey is included in Volume 5. The Contractor shall determine the national land-marks and control points at his own responsibility.

The Contractor shall carry out himself topographical surveys in order to verify the co-ordinates and levels of the primary setting out points.

3.1.5.1.4 Geological Conditions

The geology and soil stratification of the project area is mainly dominated and classified as it is located on to the Pannonia Plateau,

The site of the existing WWTP generally was investigated and results are included in Volume 5. The Contractor shall carry out himself all necessary soil investigations necessary for the struc-tures dimensions he will design.

3.1.5.1.5 Seismic Conditions

According to the Serbian standard all seismic conditions shall be considered for the structures during their design.

3.1.5.2 Design Regulations

The design shall be in accordance with the specifications included in this Volume and shall comply with the Urban Waste Water Directive 91/271 EEC and all relevant Serbian and EU Regulations relevant Serbian standards and Eurocode, DIN BS EN 180 or BSS, and other rel-evant documentation forming part of the Tender and subsequent Contract.

As a minimum EU-harmonized and Serbian standards and codes shall always be satisfied, if applicable. Other internationally acknowledged standards and codes may be used if:

The use of other official standards that provide equal or better quality than the standards and

codes specified in the Tender Dossier can be accepted after a preliminary review by the Su-pervisor and his written approval.

Applicable local standards and codes exist for the specific case (i.e. earthquake regulations).

In this case, the Contractor shall submit all the necessary information in compliance with the Su-pervisor's instructions. The Supervisor shall issue his decision within 28 days of the receipt of that information. If the Supervisor decides that the standards and codes proposed by the Con-tractor do not guarantee equivalent or better quality, the Contractor is obliged to apply the standards and codes specified in the Tender Dossier.

A standard of operator comfort, according to the actual “state of the art” level, shall be provided by the incorporation of good access, equipment lifting devices, separate storage facilities for chemicals, adequate ventilation and lighting to all operating areas, machinery guards, proper electrical insulation facilities, noise suppression and insulation, suppression of vibrations, stairs, handrails, covers, etc.



3.1.5.2.1 Design Life

Civil, Structural and Building Works shall be designed on the basis of a 50-year service life. Mechanical and electrical equipment shall be suitable for 24 hour per day continuous operation and also under discontinuous operation under all local climatic conditions and be designed such that complete replacement shall not be required until at least 15 years after the date stated on the Taking Over Certificate.

Description/SubjectDesign Life

[Years]

New Concrete & Water Retaining Structures 50

Buildings & Roads 50

Pipes & Sewers 50

Steel & Metal Constructions 25

Machine Units, Machines, Fittings 15

Cables & Accessories 25

Electrical Equipment 10

Process Control & SCADA Equipment 10

Wearing parts, other than consumable items, shall have a design life of at least 5 years, all gearboxes shall have a calculated design life of at least 60,000 hrs., assuming continuous oper-ation.

The Design of the facilities shall be in accordance with best modern European practice and ap-plicable local design standards, and shall be such as to facilitate construction, operation, in-spection and maintenance of all processes and equipment. All mechanical and electrical equip-ment to be supplied shall, wherever possible, have a proven reliability record in similar works.

3.1.5.2.2 Warranty for Materials Incorporated in the Works

Over and above the Design Life specified for the Plant, a warrant made out in the name of be-neficiary shall be provided by the manufacture of the materials listed below. The warranty shall include appropriate dimensioning of components, correct choice of materials (including auxiliary materials like ancillary materials of welding, rust preventing coats) and workmanlike installation for the periods shown.

Description/SubjectWarranty Period

[Years]

Special components and auxiliary equipment included in or attached to water retaining structures

5

Pipes & Sewers 5

Steel & Metal Constructions 2

Machine Units, Machines, Fittings 2

Cables & Accessories 2

New Electrical Equipment 2

Process Control & SCADA Equipment 2



The warranty period shall commence after the date stated on the Taking Over Certificate.

3.1.5.2.3 Spare Parts

The Contractor shall supply spare parts for the first two (2) years of operation from the comple-tion date stated after the issue of the Taking Over Certificate.

Spare parts shall be defined as components or parts, either consumable or repairable, used to maintain or repair machinery or equipment. A Bill of Materials for spare parts (spare parts list) shall be elaborated based of the manufacturers recommendations and included in the offer.

3.1.5.2.4 EIA Requirements

The design of WWTP plant shall satisfy the requirements of the Environmental Impact Assess-ment (EIA).

The Contractor’s design shall include adequate measures for the reduction of sound and odour emissions as well as for the reduction of solid wastes produced. Moreover an energy-optimised design and operation concept including treatment of odours for the rehabilitated WWTP is a pre-condition.

3.1.5.2.5 Maximum Noise Levels

In addition to the specifications of these requirements the WWTP shall be designed to ensure that the maximum noise level at site boundaries shall not exceed an equivalent continuous sound level of 55dB(A) when all equipment installed is being operated.

In addition, the noise level at a distance of 1.0 m from each sound-producing item of mechanical or electrical plant or equipment shall not exceed 72dB(A). The Contractor shall estimate and substantiate by calculation to be submitted at design submission stage the equivalent noise levels.

3.1.5.2.6 Odour Control

In addition to the specifications of these requirements the WWTP shall be designed to ensure that:

1) The principal sources of bad odours shall be covered. The principal sources are;

- Screen building

- Pump wells of pumping stations

- Grease and grit removal plants

- Sum collecting and treatment facilities

- Septic sludge acceptance and treatment facilities

- Sludge collecting and treatment facilities

- Sludge digestion facilities

- Sludge dewatering plants

2) Ventilation systems shall provide a safe working environment to comply with National Regu-lations and to the following key-principles:

- Those areas, which will regularly be entered by personnel in the course of operating the plant, shall have a minimum air change rate of 6-7 air changes per hour.



- Those areas with hazardous and workguard potential concerning dangerous gas concen-trations for hydrogen sulphide, methane gas and aerosols, shall have a minimum air change rate of 10 air changes per hour. Furthermore they are to be clearly indicated as hazardous areas.

- Those areas that would not normally be occupied or entered regularly may be ventilated to a lower air change rate and be constructed from sulphate resistant cement as determ-ined by the Contractor in his proposal.

3) The Contractor shall clearly identify in his proposal;

- Those areas which are to be ventilated to the minimum rate of 6-7 air changes an hour

- Those areas which are to be ventilated to the minimum rate of 10 air changes an hour

- Those areas which are to be ventilated to a lower rate

- Those areas where no ventilation is to be provided.



3.1.5.3 General Design Requirements

3.1.5.3.1 Preliminary - Conceptual Design

The Tenderer’s proposed design should follow the Preliminary Design (PD) prepared by the Beneficiary (based on which the Approval for Construction Number 1 12-351-00268/2009 is ob-tained) as far as the Tenderer considers that the PD is responsive to his conceptual solutions. The Tenderer shall consider design and construction of the first phase of the CWWTP for efflu-ent standards for non-sensitive areas. It has to include mechanical and biological wastewater treatment for carbon and nutrient removal in accordance with the activated sludge process with thickening and stabilizing of the excess sludge. The detailed anaerobic sludge stabilization and mechanical sludge dewatering is to be designed but are optional as part of the construction works. The design shall also include all the optional stages of tertiary (N and P removal) waste-water and sludge treatment including units for sludge stabilization. The use of parts of this neighboring plot would require approval procedure by relevant authorities, which should be taken into account in the time schedule for implementation of the works.

The Preliminary Design (PD) arrangement and layout/positioning of the required process units, buildings and structures are included in Volume V reflecting the base on which the Approval for Construction Number 1 12-351-00268/2009 has been processed. However, presented sizes and hydraulic design are not mandatory. The Contractor shall develop his own solution, dimen-sioning and plant configuration based on his proposed treatment process. Part of the neighbor-ing plot (still not acquired by the Beneficiary) can be considered for design adjustments of the sludge treatment line and other optional items, but only in case the land is acquired before the end of the Preliminary Design phase.

The Contractor shall follow the recommended design concept as far as possible and shall con-sider to design on a level of Final Design the following components

1. Inlet Section and connecting pipelines2. Mechanical Course Screen3. Lifting Station 4. Overflow with Bypass Channel5. Fine Screens, Screenings compressor, Grit Blowers and Grit Classifier Building6. Grit and Grease Removal7. Pipelines and Flow Measurement with Automatic Sampler8. Distribution Chamber9. Primary Sedimentation Tanks10. Pipelines and Distribution Chamber inlet to Biology Tanks11. Biology Treatment Tanks12. Pipelines and Distribution Chamber for Secondary Sedimentation Tanks13. Secondary Sedimentation Tanks14. Outlet Pipelines, Technical Water Supply system and Automatic Sampling unit15. Outlet Flow Measurement and discharge pipeline16. Biology Blowers Station17. Transformer station and medium voltage building18. Guard House19. Laboratory, Administration and Workshop Building20. Return Sludge System21. Primary Excess Sludge System



22. Primary Sludge Thickener Tank (PSTT)23. Internal Roads, paths, fencing and gates24. Internal potable water supply and sewerage system25. Technical Water and Fire protection system

OPTIONAL ITEMS26. Mechanical Sludge Dewatering and pipelines27. Sludge Digestion System (SDS)28. Gas holding tanks29. Power Generator and related installations30. Tertiary Treatment (N and P removal) extension of Biology lines31. Sludge Stabilization Unit

31.a For PSTT outlet sludge31.b For SDS outlet sludge

The Preliminary Design shall be detailed in the process, hydraulic and M&E parts to enable the Supervisor to evaluate the functionality and practicality of the future plant.

3.1.5.3.2 Final and Detailed Design Generally

Based on the approved Preliminary Design, the Contractor will have to complete a Final Design Documentation as required for obtaining of permits necessary for construction. The Contractor’s duty is to prepare this documentation fully in accordance with the Serbian Law on Planning and construction, in Serbian language, and in sufficient number of copies to enable the Beneficiary to complete the Permits processing with all relevant National Authorities. In accordance with the Law, the abovementioned designs should be prepared by Serbian companies licensed for this specific type of projects. Also, the Final Design is subject to review and approval, as required by the Law.

Separately, for the purpose of control of the Construction Works, the Contractor shall prepare Detailed Design, with all required drawings and calculations, which will enable the Supervisor to approve the start of the WWTP Construction Works.

The following materials for structural components are to be applied for office building and build-ings associated with any plant unit;:

Structural Component Plant Room Offices

Roofs Aluminium sheeting Tiles

Floors Floated concrete Tiles

Walls (dry environment) Fair-faced block work painted

Plastered and painted

Walls (wet environ-ment)

Fair-faced block work tiled Plastered and tiled up to 2.0 m a.m.F.L.

Ceilings Plastered and painted Plastered

Doors Steel Hardwood painted

Windows Aluminium UPVC double glazed

Distribution of Power and Telephone con-nection points

Small power points 1 outlet per 15m2 1 outlet per 5 m2



Telephone point 1 No. 1 per 10 m2

Notes:1. Buildings to comply with relevant local building standards;

2. Ventilation

- Window opening and sizing to provide adequate natural light levels during daylight hours and adequate cross ventilation;

- Toilets and washroom areas shall have a minimum of 6 air changes per hour forced ventilation;- Operation rooms, such as screen house or pumping stations shall have a minimum of 7-10 air changes per hour

forced ventilation.

3.1.5.3.3 Access and Service Roads

A new asphalt paved internal access road shall be built within the area of the new WWTP.

All process units shall be easily reachable by asphalt-paved service roads with a general width of 6.00 m that allows trucks to pass each other. In special cases roads might be narrower (e.g. sludge storage area). The minimum width is at 4.00 m. Areas for manoeuvring vehicles shall be planned at proximity of screen building. The sludge area will be furniture with a coming and leaving road. Parking areas will be done right to the administration and operation buildings. All treatment units shall be accessible for pedestrians by principal ways; minimum width is at 1.00 m.

Design and construction of access and service roads shall follow the design recommendations of German Standards (i.e. RstO latest edition).

3.1.5.3.4 Power Supply

At the WWTP a transformer is available and the overall power supply and capacity is not ad-equate for the future CWWTP. Delivery, installation and commissioning of the new trans-formers, including connections to the public network and the site network are to be included in the Contractors scope of works.

For further details, pls. refer to Volume III Section 5 Electrical Requirements.

3.1.5.3.5 Site Lighting

A site lighting system for the new WWTP shall be provided in accordance with the National re-quirements, which allows sound operation of the plant during night shifts.

3.1.5.3.6 Potable and Service Water Supply

Potable water for the WWTP shall be obtained by connecting to the existing public water pipe at the site boundary.

Delivery, installation and commissioning of the new connection are included in the Contractors scope of works.

Potable water shall not be utilised as service water. The WWTP shall be provided with a separ-ate service water and fire fighting system.



3.1.5.3.7 Fire Fighting and Fire Hydrants

The fire protection system shall be in accordance to local regulations the required capacity of the fire fighting system. The fire fighting system shall be connected to the service water system.

3.1.5.3.8 Surface Water Drainage

The WWTP shall be provided with an adequate surface and storm water drainage system for roads, parking areas, sludge storage area and main buildings. It shall be connected to the inlet facilities or internal sewerage pumping station. Other secondary areas shall be drained by per-colation.

3.1.5.3.9 Solid Waste and Sludge Disposal

The WWTP will produce solid wastes in the form of organic sludge and residues from screening and grit removal.

The generated sludge shall be stabilized in order to reduce the organic solids content of the raw sludge down to a level without offensive odours and pathogens reduced to a harmless number. Stabilized sludge shall be mechanically dewatered to be suitable for disposal at an Super-visored landfill..

Solid wastes from the mechanical wastewater treatment process shall be treated (i.e. classified and compacted) in order to be suitable for disposal at an Supervisored landfill/dumping site. Solid waste from WWTP administrative operation shall be considered to be disposed inline with the municipal waste disposal regime.

3.1.5.3.10 Security Fencing

Site security fencing and gates are to be 2.0 m high chain links. Fencing is to be provided around the WWTP and any isolated permanent ancillary building. Access gates are to be double opening 4.0 m wide with lateral wicket door.

3.1.5.3.11 As-Built Drawings

As-built drawings shall be prepared and provided by the Contractor in accordance with the re-quirements of Sub-clause 3.1.7.10 of these requirements.



3.1.5.3.12 Operation and Maintenance Manuals

Operation and Maintenance Manuals shall be prepared and provided by the Contractor in ac-cordance with the requirements of Sub-clause 3.1.7.9 of these requirements.

3.1.5.3.13 Miscellaneous

All other Works whether specified in the Contract Documents, (including the Contractor's Pro-posal) or not, as necessary for the completion of the Plant and the operation thereof, and as re-quired under the terms of the Contract.

3.1.5.4 Particular Design Parameters

3.1.5.4.1 Design Horizon

In order to reflect the development of population, water consumption, wastewater generation etc. in an appropriate way, five-year periods have been chosen, comprising an overall design period of 25 years. The splitting into five-year periods is pertinent to recognize the development of polluting loads and water quantities in order to identify the most suitable planning horizons for the different phases.

.

It shall be stressed out, that the first phase (2020) implementation is subject to this tender. The design horizon for all final stage units is 2030.

3.1.5.4.2 Contractors Design Proposal

The Contractor's design proposal to be submitted with his Tender, shall follow the recom-mended design concept and principles of the conceptual design and drawings for the WWTP (as far as technically acceptable by the tenderer to guaranty the requested results only) as a minimum requirement, and shall incorporate the specified requirements of the Specifications (Volume III, Sections 2 to 6 (inclusive)) and other such parts or sections of the Documents as are relevant.

The WWTP process design required for this project (WWTP) shall be in accordance with the German Design Regulations DWA/ATV131E or equivalent European/International Standards in order to meet the requirements of EU-Directive 91/271 EEC and the permitted effluent paramet-ers as specified in Volume III Section 2.

The Contractor shall design and construct the WWTP to fit within the current site boundary shown on the general arrangement drawing. The dimensions, arrangement and layout/position-ing of the structures shown on the drawings included in Volume V are indicative only and reflect the conceptual design of the Design prepared by the Beneficiary. The Contractor may design, locate and size the various elements of the WWTP within the current site boundary of the WWTP as the Contractor considers best but with the understanding that the design complies with the Employer's Requirements and other relevant documents contained in this Contract, e.g. the Specifications.

The Contractor's shall not only adopt the process solutions used in the conceptual design but also shall also incorporate the required number of units and/or equipment as shown in the con-ceptual design. For example;, if for a screening 2 mechanical and 1 manual screens are shown,



then Contractor’s design must include this arrangement.. Similarly, if the 2 tanks are shown, then a replacement by one larger tank will not be acceptable.

Provision must be made for in the layout for interconnections to future extensions of the plant in form of blanked-off connection pipe sections and/or at distribution chambers.

The WWTP shall be designed and constructed such that individual elements of the WWTP as tanks, chambers, grit channels etc. can be isolated from the flows without affecting the overall operation of the plant. Furthermore, the WWTP shall be designed for maximum flexibility of op-eration to treat two separate streams without disrupting the other stream when one stream is taken out of operation. The Contractor shall allow to appropriate interconnection between streams.

3.1.5.4.3 Submittal of Contractors Design Proposal

The Contractor shall furnish his Design Proposal in according to the Requirements of this Ten-der Document, including detailed specifications of equipment and guarantees as required by Volume III and attached to Contractor’s price proposal.

The design proposals prepared by the Contractor shall comprise a:

Main Proposal: Advanced wastewater treatment for carbon and nutrient re-

moval (C-N-P) with effluent standards for non-sensitive recipi-ent and sludge thickening and drying

Optional: Separate anaerobic sludge treatment, gas utilization and

dewatering; Tertiary treatment stage for sensitive recipient ef-fluent standards and any other technological proposal in ac-cordance to the requirements.

The Contractor shall furnish and submit together with his offer all required preliminary process design and hydraulic calculations and general layout plans for the WWTP site, indicating clearly:

The solution for the Works under this contract for the first phase

The indicative extension of the WWTP for the optional and future required items

In addition the following preliminary papers are required for documentation of the Con-tractors proposal(s):

1) Work Programme with specific attention and in all details for: instalment plan only for the works to be implemented;

2) Bill of Quantities for the MEICA equipment and supplies in accordance to the Schedules of Particulars.

3) General site layout with roads, piping and interconnecting sewers, power supply and interconnecting cabling;

4) Design drawings, scale 1:100, clearly showing water retaining and process relevant structures and buildings, plant and installations, including dimensions and typical in-stallation details of process and major MEICA equipment;

5) Architectural design drawings, scale 1:100, of all relevant buildings, including dimen-sions and typical installation details of process and major MEICA equipment;



6) Process flow diagrams and mass balance diagrams, functional diagrams, incl. P&ID’s;

7) Process description and process design calculations;

8) Hydraulic design calculations and hydraulic profiles (incl. Pipe work);

9) General electrical wiring and schematic diagrams and cable routing diagrams;

10) BoQ for PLC and SCADA components, incl. Plant Control Philosophy;

3.1.5.4.4 Principal Design Objectives

The following fundamental objectives, minimum requirements and constraints shall be generally considered for the Process Design of the WWTP:

a. High operation safety and high system stability of the wastewater and sludge treat-ment process with regard on the required effluent standards;

b. Ease of operation in order to allow the WWTP to be operated by a reasonably ex-perienced personnel and to minimize personnel requirements;

c. High flexibility of the treatment process in order to easily allow plant operation to be very well adjusted according to the actual wastewater load (low and-or high con-centrations and diurnal peaks for short periods of time) of the WWTP and to allow to reasonably keep up with the effects of unexpected industrial wastewater dis-charges;

d. Reduction of the volume of sludge and other residues in order to minimize disposal expenditures;

e. Minimization of capital costs;

f. Minimization of operation and maintenance costs

The Layout of the new Vrbas and Kula WWTP shall therefore consider the following minimum design requirements:

a. The direction of the prevailing winds shall be considered in preparing the site lay-out;

b. Accessibility to buildings and major structures shall be provided by asphalt roads;

c. All civil structures, electrical and mechanical equipment shall be protected from physical damage through flooding by means of appropriate drainage and pumping systems;

d. The treatment units shall be arranged in a modular way to easily allow future exten-sions of the plant.

In order to provide Hydraulic Control of the Vrbas and Kula WWTP the following minimum re-quirements are to be fulfilled:

a. All piping and channels shall be designed to carry maximum expected flows;

b. All bottom corners of channels shall be filleted;

c. All channels shall be designed to avoid creation of pockets and corners;

d. Suitable gates of non-corrodible materials shall be used to seal off bypass and un-used sections;



e. Plant components shall be arranged for greatest operating and maintenance con-venience, flexibility, economy, continuity of maximum effluent quality, and ease of installation of future units.

3.1.5.4.5 Requirements for Operation Stability and Reliability

The whole Plant shall be designed for maximum operation stability, reliability and flexibility at least system operation / maintenance and capital costs considering at least the following re-quirements:

a. Appliance of safety factors wherever necessary in order to cover not predictable situations and conditions especially concerning variations in wastewater flow, pollu-tion loads, and sludge characteristics (sludge volume index etc.);

b. Provision of indicating systems for an early stage not predictable situations and conditions like inflow of substances into the WWTP disturbing or inhibitory the treat-ment process;

c. Provisions to manage particular operation conditions like start-up, regular shut-down, emergency shut-down, operation with reduced number of process units, etc. without any deterioration of the effluent quality;

d. Provisions to manage normally expectable particular operation conditions like capa-city under- and overloading and shock load (in-flowing wastewater, sludge waters etc.), without any deterioration of the effluent quality;

e. Provisions to manage normally expectable failures in operation like bulking sludge, foaming, etc. for any process unit, without any deterioration of the effluent quality;

f. Provision of by-passes of all principal process units so that each process unit can be put out of operation without stopping the whole treatment process;

g. Provision of fix piped installation of spare pumps, machines, aggregates, easily to put into operation (“n-i” rule), whereas i = 1 for n ≤ 4 and i = 2 for n > 4;

h. Provision of connection points sufficient in number and capacity for easy installation of additional and spare pumps, machines, aggregates;

i. Provision of not fix installed spare pumps, machines, aggregates in sufficient num-ber and easily to install where fix installation is economically not feasible;

j. Simplification and unification of brands and types to allow for utmost interchange-ability of pumps, machines, and aggregates and to ease preventive maintenance;

k. Free adjustable and wide range of controlled variables to cover all possible opera-tion conditions;

3.1.5.4.6 General Hydraulic Design

The Hydraulic Design of the whole Plant shall consider at least the following requirements:

a. Hydraulic structures, interconnections, distribution shafts, etc., and treatment units which will also serve future extensions shall be designed and constructed for the peak hydraulic load of the plant.

b. Hydraulic losses shall be kept as low as possible;

c. The “n-1” rule for two or more tanks of a treatment stage: the hydraulic capacity of any weir, collection trough, pipe, channel and chamber shall be sufficient for the maximum flow increased by the factor n/(n-1), whereas n = number of tanks;

d. Distribution chambers shall be sized and constructed to permit easily operation;



e. Arrangement of any weir, collection trough, pipe, channel, chamber, tank in that way that later extension is possible without any major alterations;

f. Sufficient hydraulic uncoupling that shall be accomplished by free overflows. Free overflow is defined herein as the case that the energy level of the tail water is lower or equal than the weir crest level. Free overflows shall be arranged at minimum at the following tanks and chambers:

g. Sufficient freeboard of channels and basins must be provided;

h. The minimum and maximum flow speeds according to international standards are not fallen short off respectively exceeded in channels and pipes;

i. Pressure pipe bends points shall have a minimum radius of 1.5 x pipe diameter. Changes in direction of gravity pipe bends have to be executed with manholes. Then the minimum radius to the centre line of the chute shall be 2.0 x pipe dia-meter. Benches shall be built up the top of the pipe;

j. Pipes subject to clogging (sludge, polymer, lime pipes, etc.) shall be provided with flush valves in sufficient number and diameter.

3.1.5.4.7 Requirements for Access for Operation and Maintenance

The design shall incorporate every reasonable precaution and provision for the safety of all staff concerned with the operation and maintenance of the works.

To guarantee access to all mechanical and electrical parts of the whole plant for cleaning, main-tenance and repair, the following requirements shall be fulfilled as a minimum:

a. The space between the different process units (tanks, chambers, channels, pipe, machines, aggregates etc.) shall be big enough to guarantee acceptable accessibil-ity for the working personnel to facilitate inspection, cleaning and repairs, especially when working with lifting units;

b. All submersible aggregates (pumps, mixers, aeration grits) as well as screens and blowers shall be provided with sufficient lifting devices for operation and mainten-ance; A minimum gangway width of 0.80 m shall be provided between the main units (e.g. blowers, pumps).

c. For heavy engines and for all mechanical and electrical parts (> 50 kg), appropriate lifting units such as cranes or crabs, assembling aids, etc., shall be provided where practical. For lighter units, mobile lifting units shall be provided.

d. Assembly orifices holes and access facilities such as doors and gates shall be provided. Access to assembly orifices holes over consolidated ways or lifting facilit-ies must be guaranteed;

e. All covers such as gratings for channels or assembly orifices holes shall be provided/designed with antiskid surface and constructed in such way that they can be opened by one person only, without danger;

f. All railings and security installations shall be so arranged in that way that they can be removed easily and quickly in the case of assembly, disassembly, maintenance or repair of mechanical or electrical units;

g. Handrails shall have a work safe height of 1.1 m, access bridges and stairs shall have a minimum clear width of 0.8 m;



h. All tanks and reservoirs, etc., shall be provided with platforms and gangways, duck-boards if they are not readily accessible; Access to platforms and gangways shall be simple (without vertical ladders, for instance);

i. All tanks and chambers shall be designed in a way so that easy emptying is pos-sible, either by providing a washout for each tank or a pump sump;

j. The arrangement of the individual pieces of apparatus, pipelines and operational monitoring device must be such that the operation of the installation can be carried out unhindered and that any necessary repairs, which may arise, can be carried out without difficulty and without hindering the running of the other parts. Special care must be taken that the control systems and monitoring instruments are arranged so as to be easily visible;

k. Accessible means shall be provided for the easy lubrication of all bearings, mech-anisms and moving parts. Grease lubricating points shall be fitted with hexagon nipples.

3.1.5.4.8 General Structural Design

The Contractor shall carry out the design for all structures included in the Works according to the scope of Works mentioned in this Tender Document, in general in accordance with the fol-lowing design criteria:

All water concrete structures shall be with sulphur resistant cement

Structures should be constructed in accordance with the Serbian “Construction Regula-tions”;

Structures should be capable of withstanding external lateral soil pressure when empty. For design purposes it should be assumed that the ground water level is at the final ground level in the ultimate limit state and when calculating the safety against uplift as-suming the groundwater level to be lower than the tank wall bottom;

Structures should be capable of withstanding internal water pressure when filled with water to maximum design water level and assuming no lateral external support from soil and/or groundwater;

For the structural design of all reinforced concrete structures and water retaining struc-tures Serbian Standards and design regulations are prevailing.

All structures in which the water levels can drop suddenly shall be secured against up-lift by their own weights together with the surrounding soil. Where needed, tension piles have to be installed;

Securing against uplift by permanent or occasionally ground water drawdown is not al-lowed; In this context the installation of anti-flood valves in tank slabs and walls is not allowed.

The safety factor against uplift should meet the following requirements when calcu-lated:

The safety factor shall be at least 1.05 when the weight of the concrete together with the weight of soil on bottom slabs (calculated vertical upwards from the edges of the slabs-without any friction in the soil) only is taken into consideration.

The safety factor to be at least 1.2 when allowing friction in the soil to be taken into account.

Safety factor 1.5 for pipes when soil coverage or anchorage in subsoil is taken into consideration.



The minimum concrete coverage of the reinforcement of new water retaining struc-tures shall be 5 cm for the permanently wet surface and 4 cm for the permanently dry surface of concrete walls;

In order to incorporate the effects from thermal action, shrinkage and creep the Con-tractor should make the construction joints in accordance with the approved draw-ings. No other joints will be allowed. The Contractor shall make his structural docu-mentation in accordance with this layout.

The Contractor may adopt alternative design codes of practice subject to the approval by the Supervisor.



3.1.5.4.9 General Electro-/Mechanical Design

All materials used shall be of the best quality of the class most suitable for working under the conditions specified and shall withstand the variation of temperature and climatic conditions arising under working conditions without distortion or deterioration or the setting up of undue stresses in any part, and without affecting the strength and suitability of the various parts for the work which they have to perform.

All mechanical and electrical equipment shall be thus designed considering:

a. Provision of machinery, electrical systems, and instrumentation according to the principles “simplicity” and “reliability” with long trouble-free service with low main-tenance needs;

b. All apparatus shall be designed to ensure satisfactory operation under the climatic conditions prevailing at the site, and under such sudden variations of loads, pres-sures, and/or voltage, temperatures as may be encountered under normal working conditions;

c. All Electrical equipment shall be of adequate strength to withstand the stresses and forces imposed by the working and ambient conditions without distortion or deteri-oration affecting the efficiency and reliability of the plant; electromechanical forces that may be set up by the prospective short-circuit current.

d. Electrical equipment shall be completely satisfactory for use with the mechanical equipment chosen;

e. Each component or assembly shall have been proven in service in a similar applic-ation and under conditions no less arduous than those specified herein;

f. Outdoor equipment shall be weatherproof and designed to prevent the collection of water at any point;

g The new transformer station to ensure 20% reserve

h Corresponding parts requiring replacement shall be interchangeable in order to limit the stock of spare parts required;

All works to be carried out under this Contract shall take special attention on the local condi-tions, i.e. climatic, economical and cultural conditions, etc.



3.1.5.4.10 Particular Process Design

Particular Process Design Requirements and Design Criteria for the Contractors Proposal are specified in Volume III, Section 2 of the Tender Documents.

The particular design requirements are based on the Beneficiary Preliminary Design and the above mentioned design requirements.

Fulfillment of the specified Design Criteria is a precondition for acceptance of the Contractors design proposal.

3.1.5.4.11 Plant Control Philosophy

The Contractor shall submit a fully developed plant control philosophy for the WWTP together with his offer. It shall be based on the requirements of Volume III Section 2 of these Tender Documents and shall comprise the detailed description of the individual control circuits for the different process units and electro-/mechanical equipment, including specification of the fore-seen SCADA and measuring instruments.

3.1.6 Documents and Data Furnished by the Supervisor

The Supervisor will provide access to the Contractor to all documents listed in the Appendix to the Tender Documents (Volume V), comprising:

Beneficiary’s Conceptual Design, available in the offices the Public Enterprise Direkcija za Iz-

gradju, Vrbas

Drawings (for information only)

Geotechnical Investigation Report

The Contractor shall ensure copying of the documents, or parts of them, when he considers he needs such, and carry out himself all surveys, investigations, studies and analyses of any kind as may be necessary and specified elsewhere.

The Contracting Authority will not entertain any claim by the Contractor on account of incom-pleteness or inaccuracy of drawings and data furnished by him, irrespective of when the Con-tractor shall discover such incompleteness or inaccuracy.

3.1.6.1 Permissions Being Obtained by the Beneficiary

The Contractor shall prepare all necessary design documentation in order to enable the Benefi-ciary to obtain all permits necessary for the design, construction, occupation and use of the WWTP according to the National legislation - in accordance with the Serbian Law on Planning and Constructions.

Any type of permits and or authorisations required for the implementation of the Works must be provided by the competent Authorities through the Beneficiary in due time and in accordance with the Contract stipulations. Therefore the Contractor shall provide the Supervisor with three (3) additional copies of the Engineering Documents in Serbian language and in accordance with the above mentioned National legislation.



3.1.7 Documents to be Furnished by the Contractor

Contractors design documents shall be in accordance to Serbian LAW concerning the proced-ures and quality in constructions; Contractor's Documents required for approval from the Super-visor are as follows:

3.1.7.1 Engineering Documents

The detailed content of engineering documents, which shall be prepared by the Contractor and submitted for approval to the Supervisor, shall be adequate for the purpose. The Supervisor will reject all documents and designs in cases where he considers them to be unsatisfactory, not in compliance with these tender requirements or not sufficiently detailed. The Contractor shall be responsible for preparing all documents in a good standard, with the contents fully in accord-ance with the Employer's Requirements.

The documents and drawings to be submitted by the Contractor shall take their final form after approval by the Supervisor. The fact that these documents and drawings have been approved by the Supervisor, and that no objection has been made to the details shown on these docu-ments and drawings, which may be improper and insufficient and transferred to the design by the Contractor without adequate study, shall not relieve the Contractor of any of his responsibil-ities and shall not put any responsibility on to the Supervisor.

Approval of the technical and equipment installation Engineering documents by the Supervisor is a mandatory requirement prior to the ordering of any material and equipment. The Contractor shall not commence manufacturing or construction of any part of the Works before the approval of the Supervisor to the relevant designs, drawings, specifications or other documents has been given and shall not make any changes on the approved drawings without the knowledge of and written approval by the Supervisor. No work shall commence on any structure until complete submissions showing all details affecting its size or location have been approved.

The Supervisor may not process the documents and drawings or alternatively, if they are not submitted in the specified manner he may not process them and the Contractor shall not be en-titled to make any claims as a result of this action.

The documents and drawings to be submitted by the Contractor shall be prepared by a design Engineer to be proposed by the Contractor and approved by the Supervisor. The design Engin-eer shall hold all necessary licences (if any) as required by the national legislation.

All drawings and documents to be submitted by the Contractor in 6 copies and shall be bi-lin-gual in English and Serbian language or an equal number of copies in English with translation in Serbian language, whereas the English version will prevail one.

Documents and drawings shall be numbered following a system approved by the Supervisor. Any abbreviations used in drawings and documents shall be explained.

All drawings shall preferably be A1 and/or A3 paper sizes unless this is impracticable and shall comply with the requirements of the Engineer. Documents submitted, other than drawings and manufacturers' literature shall be A4 in size. Only SI units shall be used.

All drawings and documents shall bear in a title box in A4 format (from top to bottom) the follow-ing information’s:

a. Supervisor and Beneficiary:



b. Contractor:

c. Contract Title:

d. Project No:

e. Document or Drawing Title:

f. Scale:

g. Date:

h. Drawing Number:

i. Revisions (No., date, made by, checked by, descriptions)

j. Boxes for preparation of the drawing / document (made by, checked by, each date and signature)

k. Box indication drawing / document superseded

l. Box indication drawing / document to be read in conjunction

m. Box indication status of drawings (“working drawing / document” or “as-built draw-ing”)

n. Other boxes (preparation mode, size, CAD No., etc.)

o. Boxes for approval signatures (Supervisor, Contractor, Supervisor, Supervisor)

3.1.7.2 Drawings

All Drawings solely produced on CAD systems, shall be in the form of black lines on a white background and shall bear the following information within the title block and such other inform-ation as is required to be shown to comply with the Contractor’s Quality Assurance require-ments.

All drawings, including any Sub-Contractors, must be listed on a schedule and the schedule sub-divided into parts, i.e. process, structural, electrical, WSS, HVAC, SCADA and MEICA.

All layout and arrangement drawings shall be to scale and shall include a graphical scale to aid the use of photographic reproductions. All dimensions shall be given in SI metric units. Draw-ings shall not exceed 1200 mm x 850 mm. All line thicknesses; text height and text style shall comply with ISO. Calculations and other documentation shall include a cover page giving at least the same information as required to be shown on the drawings.

The Contractor shall submit 6 copies of all drawings, schedules, calculations and other docu-ments for which approval is required. All drawings and documents to be submitted by the Con-tractor shall be bi-lingual in English and Serbian language or an equal number of copies in Eng-lish with translation in Serbian language, whereas the English version is the prevailing one.

A programme for submitting drawings, schedules, calculations and other required documents shall be submitted by the Contractor to the Supervisor in accordance with the Contract. The pro-gramme shall identify the stages of submission and the drawings, schedules, calculations and other documents to be submitted for approval as required by the Supervisor’s Requirements and the Conditions of Contract.



Supervisor’s Review of Submissions

Items submitted for review by the Contractor and returned by the Supervisor will be categorised as fol-lows:

Category Description

1 “Approved” Subject to its compliance with the Specification’s and conformity with the overall design, the Supervisor has no comment on the submission.

2 “Approved with comments as noted”

Subject to its compliance with Specification and conformity with the overall design, the Supervisor has comments on the submis-sion but they are not such as to necessitate formal re-submission

3 “Rejected” Subject to its non-compliance with Specifications & Tender Re-quirements or Standards. The Supervisor will indicate the reas-ons for his not accepting of the submission; the Contractor shall amend or revise the submission accordingly and re-submit the item for review.

In the case of first submissions by the Contractor to the Supervisor for review, each design, drawing and document shall reach the

Supervisor in time to allow the required 21 days for review by the Supervisor before return to the Contractor.

Re-submissions by the Contractor to the Supervisor of the same design, drawing and document shall reach the Supervisor in time

to allow at least 14 days for review by the Supervisor before return to the Contractor.

Following receipt of the Contractor’s programme for submissions the Supervisor will notify the Contractor as to which particular

drawings must be classified by the Supervisor as “Approved” prior to the commencement of manufacture or construction on that

section of the work by the Contractor. Otherwise, if the Supervisor does not return to the Contractor his submissions after the re -

view periods stated above, the Contractor might proceed with his programme as though the submissions had been categorised as

“Approved”. Such assumed acceptance shall not relieve the Contractor of his sole responsibility for compliance with the Specific-

ation in the completed works.

The Contractor shall submit drawings and the other information required to the Supervisor for his approval at the stages described in this Schedule as follows:

Preliminary Drawings and Information to allow detailed design to proceed after “Approval”

Detailed Drawings and Information before start of Construction after “Approval”

3.1.7.3 Contractors Final Design

Within the period stated in the Contractor’s Programme the Contractors final design, including (but not limited to) the following preliminary drawings and information’s shall be submitted for approval:

1) General layout of the site, sections and views, clearly showing new and rehabilitated structures, plant and installations etc, in relation to present situation;

2) Process description and process design calculations;

3) Functional diagrams & process flow diagrams and mass balance diagrams;



4) Process control, instrumentation and interconnection diagrams (P&ID’s, PLC and SCADA loops);

5) Hydraulic profiles and hydraulic design calculations (incl. sewers and pipework);

6) General layout, including dimensions and typical installation details, of process and major mechanical and electrical equipment;

7) General road constructions and routes;

8) General pipework layout diagrams/routes and connection details, and the provision of necessary connections for future treatment;

9) Detailed Structural calculations, reinforcement tables, bending schedules of all struc-tures;

10) General electrical wiring and schematic diagrams;

11) Cable routing diagrams;

12) Plant performance data, incl. power consumption and operation cost calculations;

3.1.7.4 Contractors Detailed Design

Within the period stated in the Contractor’s Programme the Contractors detailed design com-prising (but not limited to) the following detailed drawings, workshop drawings and information’s shall be submitted for approval before start of construction:

1) Process, structural, hydraulic and pipeline calculations;

2) Electrical calculations including power supply sizing;

3) Protection discrimination curves and calculations for the whole works, including co-or-dination with the local Electricity Company’s supply and protection;

4) Routing diagrams for all services, incl. cable schedules;

5) Structural details, drawings and reinforcement bending schedules;

6) Pipeline layout with longitudinal pipeline sections and connection details;

7) Small power and lighting calculations and drawings;

8) Building/kiosk details, incl. architectural design drawings & house installations;

9) Road constructions and routes; landscaping and fencing details;

10) MEICA equipment installation drawings in detail, performance, connections, materials used, product type and casing broken down to machine units;

11) MCC panel drawings and detailed information, a.s.o.

Drawings and other information submitted at the previous stage that have been revised or up-dated shall be resubmitted, accordingly.

3.1.7.5 Method Statements

The Contractor shall provide in writing a general description of the arrangements and methods that the Contractor proposes to adopt for the execution of the Works. This shall be submitted to the Supervisor at the same time as the Contractors Detailed Design.

Detailed Method Statements shall show in detail the methods proposed by the Contractor for carrying out the principal activities of construction. In particular the Contractor shall indicate the resources (plant, personnel, materials) to be allocated, their timing and sequencing,



emergency/contingency measures, and any other information required to clearly detail the pro-posed methods.

The Supervisor will draw special attention on Method Statements for concrete rehabilitation and rehabilitation of steelworks, i.e. corrosion protection of scraper bridges, a.s.o.

3.1.7.6 Work Programme

Pursuant to the requirements the works programme, which has to be submitted by the Con-tractor, shall show the planned monthly rates of progress between the programme dates for commencement and completion of each major item or work for the various stages of construc-tion, in accordance with the Conditions of Contract.

The programme for the works shall take into account climatic conditions, flows in existing sew-erage and/or drainage systems, groundwater, geo-technical data and other conditions, to en-sure the completion of the works in accordance with the Contact.

The Contractor shall not be permitted to commence any construction work on that part of the works until the Supervisor approves the drawings and calculations.

The Contractor shall allow in his programme reasonable period for work to be carried out by Public Utility Services Authorities and the Beneficiary. The Beneficiary will provide all necessary assistance in liaising with such Authorities.

The Contractor shall also allow in his program sufficient time required for taking over, Con-tractor’s operation and training period and for the maintenance periods (Defects Liability Period) as stipulated in the Conditions of Contract.

3.1.7.7 Additional Geo-Technical Surveys

Reference is made to Sub-Clause 3.1.5.1.4 of this Tender Document.

The Contractor shall carry out his own geological, hydro-geological and geotechnical surveys in accordance with National and other specified Standards, incl. subsoil tests and ground water analysis for approval to the Supervisor, incl. details of the number and location of the boreholes and reference points that he proposes to use. This will not relieve the Contractor of this re-sponsibility for the accuracy of the surveys.

Additional site investigations, whether or not ordered by the Supervisor shall be carried out in accordance with DIN 4021 unless otherwise specified. The Supervisor shall identify locations and depth of boreholes.

The fieldwork to be carried out by the Contractor may comprise:

a. Vertical test borings

b. Sampling and laboratory tests

c. Penetration tests

d. Plate bearing tests

e. Permeability tests

f. Ground water table and ground water quality determination



The site investigation work shall be carried out using modern methods and equipment and by fully competent staff under the supervision of a qualified Contractor’s Representative. The equipment employed shall be such as to provide the necessary data.

If any suspicion of soil pollution is evident soil tests must be applied on samples. Any pollution by chemicals means that this material is treated as “unsound” and has to be replaced by “sound” material. “Unsound” soil structures (gypsum, salt, sulphate, etc.) have to be treated by technical precaution measures to achieve the necessary characteristics or they have to be re-placed with “sound” material.

The Contractor shall use the results of his own site investigations to design in detail every as-pect of the Works, permanent or temporary, which is affected by the subsoil. This design shall be entirely the Contractor’ responsibility to the approval by the Supervisor.

3.1.7.8 Additional Drawings

The Contractor shall prepare and submit all additional drawings and workshop drawings, includ-ing details for the construction and completion of the works on request from the Supervisor. These additional drawings shall be based on the format and principles adopted for the Engin-eering Documents and Contract Drawings and shall be produced and submitted to the Super-visor for his approval in accordance to Sub-clause 3.1.7.1.

The additional drawings prepared by the Contractor shall cover the following aspects of the works:

a. Location and arrangement of the Constructor’s buildings and offices, including ac-cess facilities and fencing;

b. Location and arrangement of work-yards, workshops, depots and stores for equip-ment, fuel and materials, including access facilities, electricity, water and telephone connections and fencing;

c. Location of and proposals for the temporary works required for constructing the Works;

d. Working drawings and calculations for all the temporary works proposed by the Contractor for constructing the Works;

e. Full working drawings indicating the Contractors proposed method of construction together with supporting calculations where applicable;

f. General arrangement detail drawings showing access to safety equipment and emergency escape plans.

3.1.7.9 Operating and Maintenance Manuals

The Contractor shall prepare and submit for the approval of the Supervisor operating and main-tenance procedure manuals in English and Serbian language which shall describe the complete functions and requirements for start-up operations, system control, wastewater quality control, maintenance, safety, record keeping, emergency response and shut down. The manuals shall deal separately with operation and maintenance.

All information in these manuals shall apply specifically to the equipment being supplied. The documentation shall be free from irrelevant matters such as might be contained in the manufac-turer’s general literature (complete copies of supplier's standard documentation will be rejected)!



The manuals shall be arranged to provide separate volumes for each principal section of the works.

Manuals shall relate to as-built conditions and shall include all necessary drawings and dia-grams for a proper understanding of the Treatment Plant.

They shall include at least the following information’s:

a. Descriptive overview of the whole of the Treatment Plant;

b. Description of all process and other plant, with relevant design and operating para-meters;

c. Descriptions of all systems installed, including mechanical, electrical, air systems, heating, ventilating and air conditioning, water supply, drainage, sewerage etc.;

d. Description of all equipment supplied including manufacturers' leaflets, which are to be scheduled for easy reference;

e. Schedules and manufacturer's catalogues for all equipment supplied, giving duties, electrical loads, etc.;

f. Schedule of all equipment suppliers (and their local agents) including names, ad-dresses, telephone, fax numbers, email & website;

g. Start-up, operation, and shutdown instructions for all parts of the Plant. These shall include process control, hydraulic control, power, and auxiliary systems;

h. Procedures to deal with breakdown and emergencies, including fault finding charts;

i. Safety requirements & measures;

j. Full maintenance instructions for all equipment including planned maintenance schedules or charts giving daily, weekly, monthly, quarterly, half yearly, annually and overhaul instructions, together with recommended lubricants and spares. These should also include details of routine maintenance work that will be within the competence of the normal maintenance staff, and notification of maintenance work that will have to be done by the manufacturer, his agent or other specialist op-erator;

k. Step by step procedure for the dismantling, repair and re-assembly of all items of equipment which shall be complemented by photographs and exploded diagrams;

l. Spare parts list, c/w. trade directory, addresses, telephone, fax numbers, email & website;

m. Record drawings of all systems installed, including general arrangements, conduit and wiring trunking systems, plant room details, air and water systems flow sheets, wiring diagrams, control schematics and valve charts, etc. to a reduced scale;

n. Certified suppliers drawings of all equipment supplied, which are to be scheduled for easy reference;

o. Site test reports for all electrical, electronic and mechanical, and water systems. Site test process reports for proving tests, commissioning reports, and suppliers test certificates;

p. Copies of performance curves;



q. List of settings of all parameters (operation terminals of the PLC) for Plant automa-tion and control at the time of handing over the Plant to the Supervisor.

A copy of each manual, in draft form, shall be submitted 3 months before commissioning is star-ted. The final version, modified if necessary in accordance with the requirements of the Super-visor, and taking into account any changes made during commissioning, shall be presented be-fore the issuing of the Taking Over Certificate.

Six hardcopies of each set of manuals, both in English and Serbian language shall be issued to the Supervisor before the plant is taken over. In addition the Contractor shall arrange the com-plete O&M documentation in English and Serbian language as Adobe-Reader file with adequate structure of the contents and additional, corresponding computer files and submit it on CD [2-fold].

Each hardcopy shall be durable and permanently bound within a stiff binder of a design to be approved by the Supervisor. They must each permit the subsequent incorporation of revisions to be necessary during the Defects Liability Period. The cover of each binder shall be finished with a black waterproof and greaseproof material and the title printed gold block in well readable lettering on the front and on the spine.

3.1.7.10 As-Built and Record Drawings

The as-built documentation drawings shall include all electrical and mechanical installations and all buildings inclusive site layout, requirements and Drawings.

Two copies of each set of drawings in English and Serbian language shall be supplied to the Supervisor prior to the commencement of the Tests on Completion for consent of the Super-visor.

Six hardcopies of each set of drawings, both in English and Serbian shall be submitted within two months before the issuing of the Taking Over Certificate.

It shall incorporate all the modifications/revisions affected during construction. Each copy shall be durably bound in a volume or volumes depending on bulk. All material except drawings shall be A4 size. Drawings shall be on A1/A2/A3 size sheets and shall preferably not exceed 297 mm in height folded and shall be bound into volumes. Volume titles shall be clearly inscribed on the front cover and on the spine of the cover. Drawings shall be marked “AS-BUILT”, the cover of each binder shall be finished with a black waterproof and greaseproof material and the title prin-ted gold block in well readable lettering on the front and on the spine.

In addition the Contractor shall arrange the complete as-built documentation in English and Ser-bian language as Adobe-Reader file with adequate structure of the contents and additional, cor-responding computer files and submit it on CD.

All drawings shall be filed on CD as AutoCAD Drawings, DWG format and in Adobe pdf-format. The CD shall be handed over to the Supervisor 2-fold.

3.1.7.11 Material Safety Data Sheet

Any product or substance used by the Contractor or its Subcontractors, which are a toxic or hazardous substance, shall be identified to the Supervisor by the Contractor’s submission of a Material Safety Data Sheet (MSDS). The MSDS or a manufacturer’s standard form shall be



submitted to the Supervisor to advise him of the use of such material during the project before the material is brought on site.

3.1.7.12 Progress Photographs

Digital colour photographs showing the progress of the Works in detail (approx. 50 pcs.) shall be taken by the Contractor every week, from positions to be selected by the Supervisor.

Each photograph shall be numbered and a statement shall be submitted giving the location, date when taken and a brief description or title.

The Contractor shall hand over to the Supervisor the corresponding files and a list numbering and labelling each photograph (location, date when taken and a brief description or title).

3.1.7.13 Monthly Progress of Works Reports

The Contractor shall prepare and submit to the Supervisor copies of monthly reports in English language in accordance to the Conditions of Contract, Sub-clause 4.21. Monthly reports shall be due on 7 days of the end of the reporting month. The reports shall be in a style and format as agreed with the Supervisor and shall be submitted in six copies. In addition to the contents as required in the Conditions of Contract, Sub-clause 4.21 the monthly reports shall include but no be limited to the following:

Progress of works, divided into design, construction, delivery, installation, testing;

Quality of works;

Any events, difficulties and problems arisen during the reporting period;

Follow up of the approved work programme: occurred delays, reasons for such delays, and

measures to make up such delays; actualisation (if necessary) of the work programme;

Cash flow forecast based upon the forecasted progress of works:

Photo report.

Each copy shall be durably bound in a volume or volumes depending on bulk size A4.



3.1.8 Services and Facilities to be furnished by the Contractor

3.1.8.1 Site Offices for the Supervisor and the Supervisor

The Contractor shall provide, maintain and remove on completion, or at such other time as may be stated, accommodation as detailed below for the exclusive use of the Supervisor and his staff. The accommodation shall be located adjacent to the Contractor's accommodation. The layout, positions and arrangement of all accommodation shall be agreed with the Supervisor prior to erection and shall include the requirements as specified in Sub-clause for the duration of the Contract.

The accommodation shall be purpose–built temporary site accommodation or similar approved buildings and shall be erected, furnished, equipped and serviced ready for occupation and use within 4 months of the Date of Commencement of the Works. Weather resistance and thermal insulation shall be to a specification appropriate to the local conditions.

The Contractor shall provide covered access between all units. External doors shall contain a letterbox and 5-lever front door lock. A sign shall be erected in a prominent position adjacent to the entrance of the offices having the words “Supervisor”.

The offices shall be connected to a mains electricity supply at 230/240 V. The Contractor is to execute all temporary cables and wiring and to pay all charges in connection with the same and the current consumed and clear away and make good on completion.

Where mains electricity supply is not available, and subject to the approval of the Supervisor, the Contractor shall supply a “demand” type generator capable of running 24 hours per day, if required, without causing any undue noise, interference or disturbance to the Supervisor and his site staff.

The offices shall be connected to mains or site drainage and mains water supply. If mains drain-age or site is not available then all foul sewage must be collected and contained without leak-age or spillage and disposed of by the Contractor as agreed by the Supervisor.

If mains water is not available the Contractor shall make suitable provision for the supply of pot-able water at the site offices.

The Contractor shall provide a hard access from the nearest point on the site access road to a parking space adjoining the office, which shall consist of hard-standing of sufficient area to ac-commodate 4 cars (provision of cars is not included under this Contract). This is to be provided at the same time as the principal office.

A hard clean footpath shall be provided from the car park to the entrance to the offices and a standpipe, short length of hose, bootjack and brush shall also be provided adjacent to the en-trance of the offices for boot washing. These facilities are to be provided at the same time as the principal office.

The office accommodation, kitchen/store, car parks, accesses and all associated equipment are to serve the requirements of the Supervisor until 6 weeks after substantial completion of the Contract when they are to be removed from the site and the area reinstated. The Supervisor may extend this period if necessary.

All premises provided for the use of the Supervisor and his staff shall be properly cleaned and maintained daily for as long as they are erected.



If any item of equipment requires servicing or repair an equivalent replacement must be provided as soon as possible.

The Contractor shall allow in his tender price for the payment of all rates and taxes in respect of any temporary structures and offices situated on the site or elsewhere used exclusively for the purpose of the Works.

The Contractor shall provide and install an approved telephone and internet system and con-nections for the exclusive use for the Supervisor. All charges shall be borne by the Contractor except call charges which shall be paid for by the Supervisor. Until such time as the specified telephone is connected, the Contractor shall provide a mobile telephone for the exclusive use of the Supervisor under the same Terms and Conditions as those for the specified telephone.

The layout of all offices and car parking facilities for the Supervisor and Contractor shall be ar-ranged to the approval of the Supervisor.

All equipment shall be in good order when supplied by the Contractor, shall be subject to the Supervisor’s approval and shall be maintained by the Contractor in good condition. On comple-tion of the Works, all non-expendable equipment will be returned to the Contractor.

Surveying equipment shall be provided for the sole use of the Supervisor and his staff for the duration of the Contract and when appropriate have a Manufacturer or Agent’s specified toler-ance certificate at the date of issue. The Contractor is required to provide the survey instru-ments on the first day of the Contract until completion of the Works.

Before commencing the Works on Site , the Contractor shall supply and erect the site offices for the exclusive use of the Supervisor’s staff at a site on the location which will be agreed with the Supervisor. The offices shall include the following minimum accommodation:

2 separate offices (one for the Supervisor and one for the meetings): approximate dimen-sionsOffices total 6 m X 2,4 mKitchen Area approximate dimensions: 3 m X 2.4 mToilet approximate dimensions: 3 m X 2.4 m

These offices shall be provided for the total construction period. Costs for regular daily cleaning and maintaining of those facilities and all utility services, except telephone calls to be included in the bid.

Toilet shall be provided with hot and cold water supplies and a flush operated WC connected to the proper disposal system.

The Contractor shall provide and install within one week after commencement of the works the following new furniture and equipment in the premises to the approval of the Supervisor:1. Desks with lock up drawers both sides, size min.: 1400 x 800 mm, h = 750 mm 2 pcs.2. PC equipped with Windows 7 (or equivalent) and Office software package and Laser printer A4/A3 size 1 pcs3. PC-table, size app. 1100 x 600 mm, with drawer and one adjustable shelf 1pcs4. Office chairs with arm rest 2 pcs5. Table, size app. 2000 x 750 mm 1 pcs6. Chairs 6 pcs7. Cupboards, 2000x 800x 350 mm with four adjustable shelves 1 pcs8. Filing cabinet, 3 drawers with file suspension and pockets, approx.1000x600x350 1 pcs9. Photocopier A3/A4+and Fax including spare toner cartridges and paper during construc-

tion period 1 pcs



10. Telephone / landline / 1 pcs11. Refrigerator 90 l. 1 pcs12. Fire extinguisher, 10 kg 1 pcs13. Air condition system with heater, max 2000W 2 pcs

After completion of the works, above listed equipment items shall remain the property of the Be-neficiary.The Contractor shall be responsible for the security of the Supervisor’s office and all equipment therein until the office is finally closed.The Contractor will maintain, light, heat and clean the offices during contract period. The Con-tractor shall be responsible for the insurance of the offices for the duration of the contract.The Contractor shall arrange for the provision of two telephone lines and instruments for the sole use of the Supervisor and his staff. An internet connection must be provided on one of the telephone lines.

The Contractor shall provide the Supervisor with all surveying, testing and measuring equip-ment, labour and other items necessary for checking, testing, or measuring up the work.Pease attach leaflet and data detailing the characteristics of the vehicles for the Supervisor in-tended to be provided by the tenderer under the relevant items in the bill of quantities. Transport for the Supervisor The Contractor shall provide the Supervisor with new vehicles:

• One 5-door 4WD (off-road), AC, central locking, hands free and ABS breaking, diesel to be delivered to the Chief Resident Engineer.• One 5-door, with four / five seats, AC, central locking, hands free and ABS braking, to be deliv-ered to the site-office of the Engineer.Regular service, maintenance, fuel, spare winter set of tires and both regular and full Casco in-surance for the whole construction period to be covered by the Contractor.

With the issuing of the Provisional Hand Over Certificate, the vehicles will be transferred as property of the Beneficiary.

3.1.8.2 Services for the Supervisor and the Beneficiary

The Contractor shall provide the Supervisor and the Beneficiary, his representatives and other persons authorised by the Supervisor with such labour and chainmen as the Supervisor and the Supervisor may require at all times, including times outside the hours being worked on the Con-tract and at weekends. The Contractor shall provide men equal to the tasks required and shall maintain continuity of employment. Chainmen shall be experienced in assisting in survey work.

The Contractor shall provide for the sole use of the Supervisor and the Supervisor and other persons authorised by the Supervisor, survey equipment in accordance with Sub-clause 3.1.14.2. All equipment shall be as good as new. The Contractor shall maintain the equipment and shall repair or replace damaged or unusable equipment without delay when instructed by the Supervisor. Upon the issue of the Preliminary Taking Over Certificate the equipment shall revert to the Contractor.

The Contractor shall provide throughout the period of the Contract all staging, templates, plumb bobs, pegs, hammers, nails, strings, paint, brushes and other such articles required by the Su-pervisor for inspection, checking of setting out and measurement of the Works.

The Contractor shall provide, maintain and replace, as required, for the Supervisor and the Su-pervisor and other persons authorised by him safety helmets in accordance with relevant stand-



ards, with cap lamps if required, torches, rubber boots, safety boots with steel inlets, and other protective clothing as requested.

3.1.8.3 Services during the Defects Liability Period

During the Defects Liability Period the Contractor shall remain responsible to the Supervisor un-der the terms of the Contract and shall bear all expenses stated in respect of making good any defects in accordance with the Conditions of Contract and the supply of all spare parts required for the maintenance of the Plant.

3.1.8.4 Mobilisation at Site

Mobilisation on site shall include the erection of all site facilities and the furnishing of all equip-ment as necessary to carry out the works under this Contract. The site facilities shall include all site installations, temporary offices, safety provisions, accommodation and sanitary facilities, provisions for water, energy and access and the installation of signboards as required.

The Contractor shall make his own arrangements for his site compounds and shall set them up at the locations agreed with the Supervisor. The Contractor shall maintain the site facilities free of charge.

3.1.8.5 Demobilisation from Site

The demobilisation includes the removal of all site facilities and temporary installations, the de-mobilisation of all equipment from site, the removal of all surplus materials, the reinstatement of all damaged or worn facilities used by the Contractor (including access roads) and the cleaning up of the construction site.

3.1.9 Criteria for Design Personnel

To carry out the detailed designs in accordance to 3.1.7, the Contractor shall only employ ap-propriately qualified and suitably experienced personnel who are familiar with all aspects of WWTP and works in connection with Sewerage systems and also be well acquainted with PRAG and Serbian legislation.

The documents and drawings to be submitted by the Contractor shall be prepared by a design-Engineer to be proposed by the Contractor and approved by the Supervisor. The design- Engin-eer shall hold all necessary licences (if required) as required by the national legislation.

The Contractor shall include within his bid detailed CV’s of the staff he intends to use. Change of key personnel i.e. Project Manager, Deputy Project Manager, Process Designer, Senior MEICA Supervisor shall only be made after CVs have been submitted to the Supervisor and ap-proved in writing by him.

3.1.9.1 Construction Management

The Contractor shall appoint a construction management team of competent and experienced Contractor’s representatives and managers, fluent in the English language (in written and oral) and provision of interpreter for those less fluent. The appointment of the management team shall be with the prior approval of the Supervisor and shall be for the duration of the construc-tion of the works.



The construction management team shall include a Project Manager, Design Engineers, and Engineers/Technical Engineers for civil, mechanical and electrical works. Work Coordinator, En-gineer and an Assistant Work Coordinator and such other management staff deemed necessary for the proper design, execution and initial operation of the works. Appropriate members of the construction management team may be required to remain on site during the Defects Liability Period and Period of Transfer, where applicable, to deal with outstanding works.

The Project Manager shall be fully responsible for expending all aspects of the design, con-struction, commissioning, and defects liability period. He shall be present at all meetings between the Supervisor and the Contractor, provided he is given reasonable notification in ad-vance of such meetings. The Project Manager shall be fully satisfied with the information and drawings provided to him by all the Contractor’s staff. He shall submit to the Supervisor’s Rep-resentative for counter-signature at each stage the relevant design reports, drawings, diagrams, schedules and details of construction, manufacture, testing, erection and commissioning pro-cedures including all interface requirements. Such information and details submitted for the Su-pervisor’s Representative’s counter-signature shall be stamped and certified by the Project Manager as checked and accepted in respect of all designs, general arrangement and interface requirements.

Within one month of the date of the Instruction to Commence Work the Contractor shall submit in writing to the Supervisor a statement of the powers and duties that he has delegated to the Project Manager.

The Contractor shall also appoint competent and experienced Design Supervisors, and Tech-nical Supervisors for civil, mechanical and electrical works whose duties shall be to monitor and coordinate all aspects of the supply and installation of mechanical and electrical equipment in the works. The Project Manager and the Technical Engineers shall be fully conversant with the provisions in the Contractor and status of the Works relating to the supply, erection, testing and commissioning of the equipment in the Contract. He shall be present at all meetings between the Supervisor and the Contractor where the mechanical and electrical equipment are con-cerned considered and when requested by the Supervisor.

All costs for provision of the construction management team shall be deemed to be included in the prices in each of the relevant Schedules of Prices and shall not be separately measured.

The documents showing the experience and working records together with notarised copy of graduation documents of the staff mentioned above and for the staff to be employed for the works shall be submitted to the Supervisor.

3.1.9.2 Site Meetings

For appropriate co-ordination of the site activities regular and special site meetings on request of the Supervisor will be held. The Contractor’s Representative(s) shall attend such meetings with the Supervisor, the Supervisor or other parties on request of the Supervisor.

The Contractor will prepare minutes of meeting (MoM) and supply both the Supervisor and the Beneficiary with a copy for comments. Any comments must reach the Contractor within fourteen (14) days after submission day. Beyond this period of time the MoM will be considered as ac-cepted by all parties.



Should the Contractor fail to send his representative(s) to any meeting at which his presence has been requested, all decisions shall be taken as if the Contractor had been present and agreed on subsequent actions and orders.

3.1.10 Quality Control

3.1.10.1 General

A Quality Assurance Procedure shall be implemented in accordance to the Conditions of Con-tract.

The Contractor shall develop the Quality Assurance Procedure relying on all his internal com-petencies in the matter of quality control in the design phase, the work phase, setting to work phase, commissioning, training and handover stages. The present document defines the follow-ing procedure:

The commitment of the Supervisor, the Supervisor, the external controllers and the Con-tractor towards the quality of the contract;

The Quality Assurance Plan shall be implemented by the Contractor prior to the com-mencement date of the contract.

The Contractor shall make sure that the quality control complies with the effective local standards. The Contractor shall take guidance from the following international standards:

ISO 9000 Standards for the quality control and assurance - Guideline for selection and utilisation.

ISO 9001 Quality system - Model for the quality assurance in conception development, production, installation, and after-sales support.

ISO 9002 Quality system - Model for the quality assurance in production and install-ation.

ISO 9003 Quality system - Model for the quality assurance in controlling and final tests.

ISO 9004 Quality control and element of the quality system - Guidelines.

ISO 8402 Quality management and quality assurance - Vocabulary.

The Quality Assurance Procedure starts after approval of the Quality Assurance Plan, which shall not be submitted later than the commencement of the Contract.

3.1.10.2 Responsibilities and Procedures

In addition to any specific obligations for sampling and testing the Contractor shall be respons-ible for routine inspection, sampling and destructive and non-destructive testing of all materials and workmanship, plant and measuring devices, in order to control the quality of work and to ensure compliance with the Supervisor and with approved samples.

The Contractor shall be responsible for establishing and maintaining procedures for quality con-trol, which will ensure that all aspects of the works comply with the requirements of the Con-tract.



The Contractor shall have available at site and ready for operation at minimum the following non-destructive test devices:

Ultrasonic welded joint gauge;

a. Ultrasonic wall thickness gauge;

b. Coating layer thickness gauge;

c. All devices needed for plate load tests:

d. All devices for test of water-tightness of pipes, sewers and basins

The Contractor shall appoint a suitably qualified member of his staff to be responsible for all as-pects of quality control (QC Executive) and to maintain close and effective liaison with the Su-pervisor.

The QC Executive of the Contractor shall at all times be have one or more persons on the site in charge with specific responsibility for quality control and no other responsibility. Such person or persons shall be vested with the authority to reject work already carried out when such work does not meet the specified standards.

The Contractor shall establish an efficient, comprehensive records facility and library, books, drawings, publications and manuals shall be indexed and their distribution controlled.

3.1.10.3 Quality Assurance Plan

As soon as reasonably practicable after the order to commence the works the Contractor shall submit for the Supervisor a detailed description of his proposed Quality Assurance Plan, at least within 2 months after commencement of the Contract.

The Plan shall include the quality control of all aspects of on-site construction. The Contractor shall be responsible for the quality of all his purchased items and as such shall develop and submit a supplier quality inspection plan for review. The inspection plan shall cover those items intended for inspection at the supplier’s works as well and the procedures for carrying out the same.

The plan shall contain at least the following items and shall be supplemented with additional in-formation from time to time as required by the Supervisor.

The Quality Assurance Plan shall contain at least the following:

a. The application range of the Quality Assurance Plan;

b. Organisation and personnel responsible for operation of the plan comprising the list of the Contractor’s staff to be engaged in quality control and materials testing to-gether with details of their relevant experience;

c. Elaboration meetings of the Quality Assurance Procedure;

d. Contract progress meetings;

e. Organisation of internal and external control.

f. Location and layout of any site material testing laboratory or any external laborat-ory;

g. List of major laboratory equipment and a description of the laboratory’s testing cap-ability relevant to the Contract of any site testing laboratory or any external laborat-ory;



h. List of purchased items and materials obtained by the Contractor for the Works which require inspection at the supplier’s premises and the proposed procedures for ensuring quality control;

List of materials and operations to be inspected by the Contractor at the various stages of

construction work on site, together with inspection procedures, test types and frequencies;

List of proposed ”milestones”, defined as points at which specified inspection and document-

ation shall be performed by the Contractor and reviewed by the Supervisor prior to proceed-ing with the work: (for example soil testing, concrete placement, back-filling, start-up of equipment, testing pipelines a.s.o.

The Quality Assurance Plan shall specify the general organisation associated with the execution of the Contract with the help of the nominative organisation charts, which shall indicate as a minimum the following. It shall describe the functions, duties and responsibilities of the person-nel involved in the Contract and of the external control responsible. It shall specify the percent-ages of the resources of the temporary personnel, and full-time staff.

Design Control; The Quality Assurance Plan shall in particular clearly state, as a minimum:

a) Distribution of tasks among the contributors;

b) The nature of documents to be submitted;

c) Methods of identification of critical points and the stopping points of the concept;

d) Methods of the check of the Design.

Document Control – traceability; The Quality Assurance Plan shall indicate as a minimum:

e) Rules for the identification of documents;

f) Rules for the circulation of the different documents produced;

g) Methods for the management of documents (distribution, classification, archiving);

h) The traceability of all relevant documentation (list of documents, indication of the revision in course, nature of validation, etc.) shall be established by a document management system.

Suppliers – Sub-Contractors, etc.; The Quality Assurance Plan shall clearly indicate:

i) Lists of suppliers, sub-contractors, etc. and associated benefits; the Contractor shall supply the lists at the earliest opportunity and justify the reasons for changing from those proposed in his Tender (where applicable);

j) The methods available to the Supervisor for checking and monitoring quality require-ments of suppliers and the sub-contractors, and courses of action available in cases of non-compliance;

k) The precise method for evaluating of sub-contractors.

Performance and Test Control; The Quality Assurance Plan shall clearly indicate:

l) Documents and procedures written to define the modes of operation, the resources and the sequencing of the different activities;

m) Methods of the establishment of a list of critical and stopping points of the performance, controls and tests;

n) Methods of the internal delivery of subcontracted tasks;



o) Methods of the control of products delivered;

p) Methods of the controls and tests in course of the performance;

q) Methods of final controls and tests before the setting to work, commissioning and han-dover;

r) Methods of the management of controlling documents (distribution, classification, archiv-ing);

Control of Non-compliance; The Quality Assurance Plan shall clearly state the methods for the identification, evaluation and rectification of matters identified as or deemed to be non-com-pliant.

Protection of the Site Equipment; The Quality Assurance Plan shall clearly indicate the meth-ods of the establishment of the list of equipment to be protected and the definition of the meas-ures to be applied.

The Contractor’s Quality Assurance Plan shall be to approval of the Supervisor. Should the Su-pervisor not be satisfied with the Contractor’s plan at any time, the Contractor shall alter his plan, as the Supervisor requires. The Quality Assurance Plan approved by the Supervisor shall be followed throughout the performance of the Contract, unless specific approvals or instruc-tions to the contrary are received from the Supervisor. Any approval by or on behalf of the Su-pervisor of the Contractor’s Plan shall not relieve the Contractor of his obligation to ensure that the works comply with the requirements of the Contract.

3.1.10.4 Sample Materials

The Contractor shall provide all material samples for testing together with the necessary stor-age, packing and transport required in connection with quality control. The Contractor shall provide all consumable materials used in testing procedures and test equipment and laboratory facilities.

Material samples shall be submitted by and at the expense of the Contractor not less than thirty calendar days prior to the time that the materials represented by such samples are needed for incorporation into any work. Samples shall be subject to approval by the Supervisor. Material represented by such samples shall not be manufactured, delivered to the site nor incorporated into any work without such prior approval.

The Contractor shall not be entitled to any compensation or claim for delays, inconveniences, damage, standing time or any other cause whatsoever, arising from the late submission of ma-terial samples.

Where samples, including samples of materials and workmanship constructed on the site, are submitted as a reference for materials and workmanship to be provided as part of the perman-ent works they shall, after approval by the Supervisor, be carefully preserved for this purpose by the Contractor.

3.1.10.5 Testing and Inspection of Material and Workmanship

The Contractor shall be responsible for ensuring that all inspections and tests in connection with quality control or otherwise are properly carried out whether on site or elsewhere, and that where necessary the appropriate remedial measures are taken.



The Supervisor will require to inspect work being prepared and to witness tests at supplier’s premises or external laboratories. The Contractor shall give the Supervisor adequate notice of the programs of work and testing at supplier’s premises or external laboratories to enable the Supervisor to arrange such inspections.

Manufactured items and materials delivered to the site shall be inspected by the Contractor on arrival. Any defects shall be notified to the Supervisor. Minor defects to surface finishes and the like in manufactured items shall be made good in an approved manner to the satisfaction of the Supervisor. Items with more serious defects shall be returned to the suppliers for correction or replacement as appropriate.

Furthermore the Supervisor reserves to himself the fabric inspections of materials at the produc-tion works. The contractor shall provide unrestricted access at any time to any production plant.

Inspections and tests carried out by or on behalf of the Supervisor shall not relieve the Con-tractor of his responsibilities in connection with quality control.

3.1.10.6 Testing During Manufacture and/or Construction

The Supervisor or his representative will require certified manufacturers results of test during manufacturing of the following equipment:

a. Low Voltage Switchboards;

b. Motor Control Centres;

c. Pumps, Mixers and Blowers;

d. Screens and Scraper Bridges;

e. Other special equipment, i.e. Belt Filter Press/Centrifuge.

Should the test(s) fail then the Contractor shall be required to rectify the failure and arrange for the test to be repeated, again giving two weeks notice and providing travel facilities as previ-ously provided.

3.1.10.7 Site Records and Test Certificates

Quality Control records, test certificates, reports and daily records of on-site testing and inspec-tion shall be kept on forms approved by the Supervisor.

The QC Executive shall certify the test results. All test certificates and inspection records (in-cluding any from suppliers or other outside testing agencies) shall be clearly identified with the appropriate part of the works to which they refer, and shall include information required by the relevant Reference Standard or Supervisor, and they shall be submitted to the Supervisor.

Manufacturer’s and supplier’s test certificates shall be submitted as soon as the tests have been completed and in any case not less than 14 (fourteen) days prior to the time that the materials represented by such certificates are needed for incorporation into the permanent works.

Certificates of tests carried out during the construction or on completion of parts of the perman-ent works shall be submitted within 14 (fourteen) after completion of the test.



3.1.10.8 Reports and Inventories

Once each week, or at such longer intervals as the Supervisor may allow, the Contractor shall submit in an approved form a report in triplicate including information on all quality control in-spections and tests performed at site and elsewhere in the intervening period.

The report shall include all work performed by the Contractor, tests performed with applicable sample numbers, and inspection reports for both the supplier’s shops and the permanent works. All test data shall be summarised in tabular and/or graphical form in a manner, which best illus-trates the trends, specific results and requirements. Where tests do not meet requirements, full explanations shall be provided to show what action was taken (i.e. rejection of the work, retest, etc.).

Each report shall also contain a forecast of quality work likely to be carried out during the period to be covered by the succeeding report.

The Contractor shall keep detailed and up-to-date inventories, in an approved form, of goods and materials subject to quality control, which are on order, have been delivered, found faulty, lost during the work or found to be surplus to requirements. The Supervisor shall have access to these records at all times. Summary inventory records shall be submitted to the Supervisor once a month.

3.1.10.9 Concrete Mix

The concrete mix shall comply with Serbian Code of Practice to the requirements for each spe-cific structure.



3.1.11 Testing of the Plant

3.1.11.1 General

Tests shall be performed in accordance with the Conditions of Contract. In accordance to the requirements of Sub-clause 3.1.10 the Contractor shall provide a test programme for the tests regarding the function of each part of his work (functional tests) and the performance of the total works (performance tests). Test procedures are subject to the approval and witness of the Su-pervisor.

In case of disagreement on test results an independent testing institution shall be called as me-diator. The costs for this procedure shall be borne by the losing party.

Subject to the approval of the works may be subdivided into sections that may be tested separ-ately.

The commissioning period shall commence at such date determined by the Supervisor and after the Contractor has successfully realized tests on completion and put the WWTP into operation.

In order not to extend the construction period any process tests shall take place after test on completion in the assisted operation phase.

The period of testing shall terminate after the plant has been satisfactorily and successfully run by the Contractor (as certified by the Supervisor) for 28 consecutive calendar days or for such extended period in excess of 28 days as may be required by the Supervisor to make up for in -terruptions in the operation of the plant.

A record of the completed tests shall be submitted for approval from the Supervisor and the Su-pervisor. A report showing all works during this period shall be prepared and submitted to the Supervisor for approval. If the Supervisor’s Representative and the Contractor disagree on the interpretation of the results of the Tests, the decision of the Supervisor shall be final and bind-ing.

The Contractor has to enable access to sites at any time to any external institutes or experts carrying out independent testing.

3.1.11.2 Tests on Completion

In addition to the requirements as specified in Sub-clause 3.1.10.5 and 3.1.10.6 of these Sec-tion the Contractor shall perform functional tests for all MEICA equipment and process units and as such performance tests are considered necessary in the opinion of the Supervisor for all equipment, either under test conditions in the manufacturer's works, on site or elsewhere, preferably on site, in order to determine prove that the works comply with the Supervisor.

The Contractor shall give the Supervisor four (4) weeks' notice (if the functional tests are carried out elsewhere than on site) respectively two (1) week notice (if the functional tests are carried out on site) of his intention of carrying out tests at his own or other manufacturer's premises or on site, and that the equipment is ready for operation. The Contractor shall provide a test pro-gram to test the function of each part of his work.

When the tests and inspections have been completed to the satisfaction of the Supervisor, and when the test certificates and performance curves, etc., have been checked, the Supervisor



shall confirm acceptance in writing. Plant shall not be incorporated into the works or delivered until this acceptance has been received.

Within two (2) weeks of completion of any witnessed functional test, the Contractor shall obtain and submit to the Supervisor, and to other parties as may be directed, test certificates and per-formance curves of all items giving detailed records of all electrical and mechanical tests carried out on the equipment and material, both at the manufacturer's works or on site., including lifting equipment, tanks, pressure vessels, cables and cabling, etc.

Copies of certificates of all tests of all items shall be submitted to the Supervisor. Copies of test certificates of all major items shall be included in the operating and maintenance instructions as detailed elsewhere.

Where witnessed tests are not required, the test certificates and performance curves shall be forwarded to the Supervisor’s Representative within two weeks of receipt of the instructions to waive witnessed tests.

The Supervisor reserves the right to instruct the Contractor to meet any extra costs which are occasioned by failure of the Contractor to comply with the above testing and inspection require-ments, including the provision of test certificates, performance curve suborders, etc., or which, in the opinion of the Supervisor, are due to insufficient care having been taken by the Contractor or the subcontractor before presenting the plant for inspection or test.

3.1.11.2.1 Test Equipment

The Contractor shall provide and install ready for use any equipment, materials, consumables, water, etc. necessary for execution of the functional tests at his own expenses.

Any equipment used in the testing of the plant shall comply with the appropriate safety regula-tions and requirements in all respects. The Contractor shall ensure that all subcontractors are acquainted with the contents of the Supervisor.

The manufacturer shall satisfy the Supervisor's Representative regarding the accuracy of all in-struments used for tests and, if required, shall produce recent calibration test certificates, or oth-erwise have the instruments calibrated at his own expense by an independent authority. I.e. kWh meters shall be checked for correct rotation and creep tests shall be carried out to ensure that the meter is inoperative with voltage alone if the secondary of the current transformer is left connected with the primary current interrupted.

The Contractor shall give the Supervisor advance written notice of his intention to carry out test-ing. The form and period of notice are to be agreed between the Supervisor and Contractor.

Test certificates shall be prepared by the Contractor in a form to be agreed upon, and shall be signed by the Supervisor's Representative on the satisfactory completion of each test. One copy of each signed certificate shall be kept by the Supervisor and one by the Contractor.



3.1.11.2.2 Functional Machine Tests

All functional tests shall be carried out by the Contractor under the supervision of and to the sat-isfaction of the Supervisor, as follows:

a. Each pump set shall be tested for capacity, head, power consumption and mechan-ical reliability;

b. Each blower, radiator etc. set shall be tested for capacity, head, power consump-tion and mechanical reliability;

c. Each mixer and the digester sludge mixing system shall be tested for its purpose, power consumption and mechanical reliability;

d. Each screen shall be tested for its purpose, stability, capacity, power consumption and for full reliability in all aspects;

e. Each screening press shall be tested for its purpose, stability, capacity, power con-sumption and for full reliability in all aspects;

f. Each grit classifier shall be tested for its purpose, stability, capacity, power con-sumption and for full reliability in all aspects;

g. Each sludge, screening, grit conveying equipment shall be tested for its purpose, stability, capacity, power consumption and for full reliability in all aspects;

h. Each settlement tank scraper shall be checked in a dry tank for alignment of scraper flight operation and for sludge / grit removal mechanism and for grease / scum / floating sludge removal mechanism, stability, vibration and free running throughout a complete revolution of the unit. Each scraper shall be tested in a full tank for its purpose, stability and vibration, free running over the complete operating range and full reliability in all respects;

i. Each aeration unit shall be tested for vibration-free running, power consumption, complete mix of liquid, sufficiently strong suspension, and freedom from mass rota-tion of liquid and for oxygenation capacity and oxygen transfer efficiency under clear water conditions as specified in 3.1.14.3;

j. Each sludge thickener rake system shall be checked in a dry tank for alignment of rake arms and scraper flight operation and for floating sludge removal mechanism, stability, vibration and free running throughout a complete revolution of the unit. Each rake system shall be tested in a full tank for its purpose, stability and vibra-tion, free running over the complete operating range and full reliability in all re-spects;

k. Each surplus sludge mechanical thickening and digested sludge dewatering ma-chine shall be tested for its purpose, stability, capacity, power consumption and for full reliability in all aspects;

l. Each digester sludge mixing system shall be tested for its purpose, stability, capa-city, power consumption and for full reliability in all aspects;

m. Each polymer and lime dosing station shall be tested for its purpose, stability, capa-city, power consumption and for full reliability in all aspects;



n. Each motor for the emergency and co-generated heat and power plant shall be tested for fuel input, power and thermal output and effectiveness and for full reliabil-ity in all aspects.

All mechanical installations and machines are to be tested analogously, after submittal of a test program for each individual item upon approval of the Supervisor.

3.1.11.2.3 Hydraulic Tests

Pumps, pipes, valves and pressure vessels shall be hydraulically tested to the pressure as spe-cified or to at least 2.0 times the maximum working pressure or 1.5 times the normal pressure, whichever is the greater.

Testing of pipes, general:

The testing of pipes shall in all cases be carried out in the presence and to the satisfaction of the Supervisor. The complete pipeline, including blank flanges, caps, plugs, pressure gauges, pipe connection cocks, struts and thrust blocks, etc., shall be provided with anything necessary for effectively testing the pipelines at the required pressure. The Contractor shall keep the said plant in good order during the continuity of the Contract, all at his own expense. Any pipe or length of pipe found to be defective shall be immediately removed and replaced without addi-tional cost, and leaking joints shall be remade. The test shall be repeated as often as necessary until the whole length under test is accepted by the Supervisor.

Testing of Pipelines:

The testing of pipelines will be carried out accordingly; hydraulic tests will also be applied for all pipes of the force mains and the sea outfall.

Testing of Tanks:

The testing of tanks on water tightness will be carried out similar to DVGW W 311 (or interna-tionally acceptable standards). The following is an overview for testing with DVGW W 311. Smaller flow confluence or distribution chambers and manholes of gravity pipelines shall be tested accordingly:

a. Excavation for tanks shall not be filled, tank wall outside and inside faces shall not be coated nor plastered, no plain concrete (for making of internal benching etc.) shall be placed before the water tightness tests have been successfully passed;

b. The test may not be commenced before the concrete has hardened for 28 days;

c. Filling with water shall take place at an uniform rate of not greater than 2 m in 24 hours;

d. A period of 1 week shall be allowed for stabilisation (intake of water into the con-crete);

e. Water levels shall be measured by approved means at 24 hours intervals for a test period of 7 days;

f. During the test period the total permissible water level drop, after allowing for evap-oration and rainfall, shall not exceed 1/500 of the average water depth of the full tank or 1 cm, whichever is the more.

Not withstanding the satisfactory completion of the above test, any leakage or soaking visible on the outside face of the tank walls shall be stopped, after allowing for self-sealing. Any caulking



or making good of cracks in the concerned wall section shall, where practicable, be carried out from the inside face.

Adjacent internal chambers within a structure shall be tested sequentially in case the treatment process allows for emptying of the respective chamber independently of the whole structure. Then chambers adjacent to the chamber under test shall be empty during the test.

3.1.11.2.4 Damages for Failure to Pass Tests on Completion

Damages for Failure to Pass Tests on Completion shall be dealt with in accordance with the Conditions of Contract. The Contractor shall, at his expense, adequately rectify faults to the sat-isfaction of the Supervisor.

3.1.11.3 Commissioning

The commissioning period shall commence at such date determined by the Supervisor and after the Contractor has successfully realised all functional and works tests on completion and put the Wastewater Treatment Plant into operation.

The commissioning shall not be commenced until the required quantity of wastewater flow is available and the Supervisor has approved the Contractor’s proposal and program for commis-sioning the works.

Subject to the approval of the Supervisor the works may be subdivided into the wastewater treatment section, the sludge treatment section and the pumping stations and sewer connection facilities, which may be commissioned successively.

The Contractor shall supervise the working of the mechanical and electrical plant and shall provide technical supervision continuously to effect any adjustment and remedial works that may be necessary. The Contractor shall co-operate and render all assistance necessary as re-quired by the Supervisor during the commissioning of the plant.

The services to be provided during the commissioning period shall include but not be limited to the following:

a. Conduction of the start-up of the WWTP in accordance with the commissioning work plan approved by the Supervisor;

b. Provision of all skilled personnel for the commissioning of the plant using the O&M manuals to demonstrate that the installation is capable of meeting the specified design and performance criteria. The Contractor shall maintain on site all neces-sary specialists on commissioning and technical personnel for a period of fourteen days after the successful commissioning to effect any adjustment that may be ne-cessary;

c. Assisting in supervising operation of the plant under a series of selected routine and non-routine process modes and conditions to determine the performance of in-dividual elements and provide a base record of the capabilities of the WWTP for fu-ture reference;

d. Assisting in supervising the operation and maintenance of the WWTP using various operating and maintenance procedures to test alternatives and determine optimum methods of operation. The operating trials shall include but not be limited to the fol-lowing;



Commissioning shall include monitoring, reporting and referring of problems, which cannot be resolved on-site to the Supervisor and recommend alternatives to correct the problems.

3.1.11.4 Tests After Completion

3.1.11.4.1 General

On completion of erection and after the initial setting to work the Contractor shall notify the Su-pervisor that he is ready to demonstrate the performance of the plant. Such a demonstration is referred to herein as site testing, which shall be witnessed by the Supervisor.

The Contractor shall then fully test all items of equipment and the whole plant and shall include provision and arrangement of:

a. All skilled and qualified staff and labour for operating and testing equipment;

b. Provision and disposal of all services such as lubricants, fuel, electricity, water, etc.

c. All measuring and testing instruments necessary to demonstrate that the equip-ment operates to the fulfilment of the Technical Requirements.

The period of testing shall terminate after the plant has been satisfactorily and successfully run by the Contractor (as certified by the Supervisor) for 28 consecutive calendar days or for such extended period in excess of 28 days as may be required by the Supervisor to make up for in-terruptions in the operation of the plant.

The Supervisor having so certified in writing, the Contractor may apply for a Preliminary Taking-Over Certificate for whole Plant in accordance with the General Conditions of Contract.

3.1.11.4.2 Testing of Pumps, Blowers, Mixers, Conveying Equipment

Pumps, blowers, mixers, and conveying equipment shall be tested on performance by the Con-tractor under the supervision of and to the satisfaction of the Supervisor analogues to 3.1.11.2.2:

a. Each pump set shall be tested for capacity, head, and power consumption;

b. Each blower, radiator etc. set shall be tested for capacity, head, and power con-sumption;

c. Each mixer shall be tested for mixing effectiveness and/or capacity and power con-sumption;

d. Each sludge, screening, grit-conveying equipment shall be tested for capacity and power consumption;

All mechanical installations and machines are to be tested analogously, after submittal of a test program for each individual item upon approval of the Supervisor.

3.1.11.4.3 Testing of Sub-Systems

The following subsystems shall be tested on performance (capacities, flows, pressures, separa-tion effectiveness, fuel input, output of electrical and thermal energy, electrical and thermal effi-ciency, etc.) as a whole as specified in the Mechanical and Electrical Requirements, including the dedicated power supply, instrumentation and local control and automation systems:



a. Water supply and site process water system;

b. Screens and screening press;

c. Grit removal and classification;

d. Primary sludge separation, pumping and thickening;

e. Aerators oxygenation capacity and oxygen transfer efficiency under wastewater conditions as specified in 3.1.14.3;

f. Return and surplus sludge separation and pumping;

g. Surplus sludge thickening, sludge mixing system;

h. Thickened sludge pumping;

i. Sludge dewatering and storage system;

j. All mobile and fixed lifting systems;

k. Electrical power supply including power switching, transforming, distribution;

l. Central control and automation system including remote data transmission to/from substations;

m. Building and outdoor installations, telephone systems, security and safety systems, earthing, lightning protection systems, site lighting;

If performance tests for aeration capacity and oxygen transfer efficiency fails for more than two times and are not to the satisfaction of Supervisor, it shall be repeated in accordance to the con-ditions as specified in Sub-clause 3.1.14.3.

3.1.11.4.4 Damages for Failure to Pass Tests after Completion

Damages for Failure to Pass Tests after Completion shall be dealt with in accordance with the Conditions of Contract. The Contractor shall, at his own expense, adequately rectify faults to the satisfaction of the Supervisor.

3.1.12 Plant Operation and Maintenance

The Contractor’s scope of works shall include a one month assistance and supervision period of the Beneficiary plant operation, in accordance to the requirements specified in Sub-clause 3.1.2.8. This one month assistance period shall follow the successful test and commissioning period and after issue of the Taking Over Certificate.

The O&M period be run in parallel to the Defects Liability Period and shall include, but not lim-ited to:

a. Staff Training

b. Assistant Plant Operation

c. Assistant Plant Maintenance

Payments for the services of the Contractor for supervision of operation and maintenance of the whole Plant carried out by the staff of the Beneficiary for 1 month will be based upon a lump sum rate.



3.1.12.1 Staff Training

The first period of the assisted operation phase, which should mainly comprise the implementa-tion of a plant management and operation system and specialized staff training should cover the contractual defects liability period of the WWTP and shall be performed in close cooperation with the BENEFICIARY

The Contractor shall provide on-the-job training as required to implement the plant management and operation system in an appropriate manner. The services shall be provided by the perman-ent operation manager, assisted by short term training, operation, maintenance and process ex-perts, and shall be addressed to the achievement of three major results:

a. The activities are adequately organized and performed according to the work plan;

b. The staff is fully familiar with tasks and masters operation routines;

c. The staff is familiar with the handling of emergency, safety and first aid procedures.

During further operation phase the WWTP shall be fully operated by the beneficiary staff. The Contractor shall work in line with his own methodology and work program and include all ser-vices he deems necessary to fully develop sustainable operation routines.

The Contractors services shall include, but not limited to:

o Six weeks prior to the commencement of commissioning the Contractor shall submit

to the Supervisor a training programme/methodology, indicating how he intends to train the Supervisor’s personnel in the operation of the Plant. This should comprise but not be limited to:

o Formal instruction in a ‘classroom’ type environment;

o External instructions/training by the main suppliers (i.e. pumps, blowers, etc.)

o Formal ‘hands-on’ training on the Works itself;

o Attendance of Supervisor’s personnel during commissioning phase and Contractors assistant operation period;

o A period of Contractor’s support whilst the Supervisor’s personnel operate the works.

o The beneficiary’s staff to be trained onsite will accompany the Contractor’s staff as-

sisting their duties where it is necessary to learn “on-the-job”. The Contractor has to involve the beneficiary’s personnel in all operational issues on direction of the Super-visor.

o The total number shall be 10 Employee’s such as technical plant manager, chemist,

electrical and mechanical operators (craftsmen). All training documents shall be in English language. The Key-staff shall have the following qualifications:

o 2 Nos. Supervisors (Expert);

o 2 Nos. Skilled Supervisors (Supervisor/Technician);

o 2 Nos. Skilled Supervisors (Chemists/Technician);

o 2 Nos. Skilled Supervisors (Master-craftsman);

o 2 Nos. Skilled Supervisors (Craftsman/Mechanist/Electrician)

The Contractor shall further assist the BENEFICIARY in the procurement of missing items re-quired for the provision of proper O & M services. Moreover the Contractor shall compile/update



the operation handbooks/O&M-Manuals, operation and maintenance plans and other procedure documents required for appropriate WWTP operation and staff training.

3.1.12.2 Assistant Plant Operation

The Contractor’s 1 month assistance of the Beneficiary in plant operation of the WWTP shall maintain at least the following requirements:

o Plant operation based on the Contractors O&M Manual;

o Review/update of the O&M Manual which shall be based on supplier’s handbooks

and as-built drawings for the plant and shall include a detailed method statement and program setting out proposals for meeting all obligations for the operation of the plant as detailed in Sub-clause 3.1.7.9.

o Preparation and implementation of Standard Procedures (SP) for the WWTP,

which are appropriate for the Works control and operation of the individual process units. The Contractor shall develop and implement SP for the operation & process control of the WWTP grader measures. These SP shall indicate the activities which are required for the proper operation of all facilities and shall cover but not be limited to:

o Operators’ daily activities

o Daily operating log’s

o Flow recordings

o Monitoring records

o Equipment defects

o Emergency response plans

o Assistance to BENEFICIARY in the further development of performance standards

and ranges of performance for the upgrade measures;

o Development of routine recording procedures for the operational activities on the

WWTP. Devising reporting methods, which will be used to produce routine reports;

o Development of procedures and recording systems to deal with emergency condi-

tions;

o Development and implementation of a Quality Assurance and Maintenance Pro-

gramme.

The Contractor shall assist and train personnel in carrying out the daily activities in accordance to the approved SP and the requirements of the O&M Manual. Furthermore ongoing revision and assessment of the SP’s shall be included, in accordance to the operational requirements of the WWTP.

Environmental monitoring in the context of the operation of the WWTP relates to the monitoring activities to be performed at the treatment site, i.e. to monitoring of treated effluents, registration of residue disposal to dumping sites and monitoring of sludge disposal.



3.1.12.3 Assistant Plant Maintenance

Maintenance services of the Contractor shall ensure the continuous operation of all plant com-ponents under normal operating conditions, and avoid breakdown or deterioration of plant per-formance.

Full operational maintenance comprises the planned and regular maintenance of MEICA equipment and other installations, carried out on a day-to-day basis together with preventive and corrective maintenance. It includes cleaning, lubricating, minor adjustment, fault and break-down repair and replacement of parts, in accordance with the approved maintenance plan, for those items of plant and equipment of the WWTP which have been commissioned and made operational.

Standby maintenance comprises the planned and regular maintenance carried out by the Con-tractor including cleaning, lubricating, periodic operation and minor adjustments of all items of plant and equipment within the WWTP which have been preliminarily handed over, but have not yet been made operational.

For proper organization of maintenance of the WWTP the Contractor shall maintain at least the following requirements:

o Preparation and implementation of an Maintenance Plan which shall include a detailed

method statement and program setting out proposals for meeting all obligations for the maintenance of the WWTP.

o Preparation and implementation of Standard Procedures (SP) for maintenance of the

WWTP. These SP shall indicate the activities, which are required for the proper organiz-ation of the maintenance activities and shall cover but not be limited to:

o Programs for all maintenance activities indicating frequencies

o Workshop practices and stores management

o Plant replacement policy

o Check lists for the evaluation of maintenance activities

o Preparation of a detailed inventory of all items of plant and spares for all technical com-

ponents to be provided for the WWTP.

The Contractors WWTP personnel shall carry out the maintenance of the new plant installations in accordance with the requirements of the O&M Manual and the approved maintenance plan. Furthermore ongoing revision and assessment of the SP’s shall be included, in accordance to the operational requirements of the WWTP.

3.1.12.4 Staff Requirements

The Contractor shall appoint a team of competent and experienced experts.

During assistance of the Beneficiary in WWTP plant operation the contractor will be free to de-termine his own levels of staffing to meet the requirements training. At minimum the staff man-agement structure shall include the following personnel:

o Engineer (Process Expert; with. professional experience in WWTP operation & manage-

ment)

o Operation technicians (Shift-Master; with. professional experience in WWTP-O&M);



o WWTP/O&M specialist (Mechanical/Electrical Operator; with. professional. experience in

WWTP -O&M);

o Specialists for power supply, instrumentation and control, SCADA;

o Chemists / laboratory assistants.

The Operator shall provide all secretarial support, translators, printing and publishing services, and office supplies as necessary for the O&M period.

The appointment of the Contractors training team shall include copies of graduation documents of all experts and shall be with the prior approval of the Supervisor.

All costs of provision of the experts O&M team shall be deemed to be included in the prices (monthly lump sump rates) in each of the relevant Price Schedules and shall not be separately measured.

3.1.13 Provisional Sums

Provisional Sums are allowed for and are shown in the Price Schedules, Volume IV. Provisional Sums are for use when work is to be executed on a daywork basis. Work shall not be executed as daywork except by order of the Supervisor in accordance with the provisions of the Contract.



3.1.14 Annex to Volume III Section 1

3.1.14.1 List of Standards

Generally all Serbian and internationally recognized Norms and Standards are accepted. Nev-ertheless with respect to safety, health and working protection the related standards and laws which are directly linked to local legal provisions, the local law respectively the relevant binding local standards and norms shall be applied.

The work must be performed according to the most recent relevant international codes, stand-ards, accident prevention regulations and the local rules and regulations.

The Engineering documentation shall correspond with ISO standards. Used symbols on draw-ings etc. conforming to the following Systems and Standards (DIS = Draft International Stand-ard).

A) Electrical : International Electrotechnical Commission (IEC). B) Instrument: ISO 3511/1-4: Process measurement control,

functions and instrumentation – symbolic representation.

C) ISO 4067-1: Graphical symbols for plumbing, heating, ventilating and ducting.

D) ISO 4067/2: Simplified representation of sanitary appliances.E) ISO 8545: Graphical symbols for automatic control. F) ISO/DIS 4067/4: Symbols for refrigerant plants.

All materials and equipment supplied and all work carried out as well as calculation sheets, drawings, quality and class of goods, methods of inspection, specific design features of equip-ment and parts and acceptances of partial works shall comply in every respect with the tech-nical codes of the International Organization for Standardization (ISO) and of the International Electrotechnical Commission (IEC).

Goods and special guarantees beyond the scope of ISO or IEC shall conform at least to one of the following standards and codes:

British: BSS, BSI, BA, CP

German: VDE, VDEW, VDI, AD, DIN or equivalentas far as these standards, codes and regulationsare available in an English language edition.

Pipes and accessories shall be in accordance with European or similar acceptable Serbian standards if the use of other standards is not specially requested.

wherever in this document reference is made to a specific standard, it should be deemed to also include the relevant EU or Serbian equivalent (or higher) standards



Other internationally accepted standards which ensure a quality equal to or higher than the standards mentioned above, but only if these are submitted in the English language (it is the ob-ligation of Vendor/Contractor to demonstrate this requirement).

The Bidder must clearly state his proposals concerning the use of Standards and Codes.

It is the Contractor’s responsibility to provide sufficient evidence that any national or other standard the Contractor proposes (other than those mentioned above) will ensure an equivalent or higher standard.

Immediately after the Effective Date of the Contract the Contractor shall supply an indexed list of all standards, codes and associated standards referred to, to which the work is to be per-formed

The quality control systems and plans shall be according to ISO 9000 and subject to approval of the Supervisor.

This Section includes reference to publications for guidance on current practice on some topics. The editions of approved Standards used shall be those current 28 days prior to the date for the return of tenders.

The Contractor may be required to supply any of the Standards or publications listed in this sec-tion for the use of the Supervisor’s Representative (with English language translations where appropriate).

List of Serbian Standards

13 Environment health protection and safety

13.020 Environmental protection13.030 Wastes13.04. Air quality13.060 Soil quality. Penology13.100 Occupational safety. Industrial hygiene13.110 Safety machinery13.120 Domestic safety13.140 Noise with respect of human beings13.160 Vibration and shock with respect to human beings13.180 Ergonomics13.200 Accident and disaster control13.220 Protection against fire13.230 Explosion protection13.240 Protection against excessive pressure13.260 Protection against electrical shock13.280 Radiation protection13.300 Protection against dangerous goods13.310 Protection against crime13.320 Alarm and warning system13.340 Protection equipment

29 Electrical engineering

29.020 Electrical engineering in general29.050 Conducting materials29.060 Electrical wires and cables29.180 Transformers. Reactors



29.240 Power transmission and distribution networks29.260 Electrical equipment for working in special conditions

31 Electronics

31.020 Electronic components in general31.200 Integrated circuits31.220 Electromechanical components for electronic and telecommunications equipment31.240 Mechanical structure for electronically equipment

91 Construction materials and building

91.010 Construction industry91.020 Physical planning. Town planning91.040 Buildings91.060 Element of building91.080 Structure of building91.090 External structure91.100 Construction materials91.120 Protection of and in buildings91.140 Installations in buildings91.160 Lighting91.180 Interior finishing91.190 Building accessories91.200 Construction technology91.220 Construction equipment

91 Civil engineering

93.010 Civil engineering in general93.020 Earthworks. Excavations. Fundation construction. Underground works.93.080 Road engineering93.140 Construction of waterways and ports93.160 Hydraulic construction

3.1.14.1.1 German DIN Standards

The German Standards referred to have been issued by Deutsches Institut für Normung, Burggrafenstrasse 4-10, 10787 Berlin, Germany.

List of German Standards referred, but not limited to:

DIN 488 Reinforcing steel

DIN 1045 Structural use of concrete, design and construction

DIN 1048 Testing methods for concrete

DIN 1055 Design loads for buildings

DIN 1084 Quality control of concrete

DIN 1164 Cement

DIN 1187 Unplasticised polyvinyl chloride (PVC-U), drainpipes

DIN 1212 Step irons for staggered manhole steps; brim shaped step irons

DIN 1229 Gully tops and manhole tops for vehicular and pedestrian areas

DIN 1388 Universal WC flush down type made of sanitary porcelain material

DIN 1390 Urinals of sanitary porcelain, wall hung



DIN 1626 Welded circular unalloyed steel tubes subject to special requirements, technical de-livery conditions

DIN 1910 Welding

DIN 1986 Drainage Systems on Private Ground

DIN 1988 Drinking water supply systems

DIN 4021 Soil; exploration by excavation and borings

DIN 4032 Concrete pipes and fittings

DIN 4033 Sewers and sewage pipelines; code of practice for construction

DIN 4034 Precast un-reinforced and reinforced concrete components

DIN 4035 Reinforced concrete pipes

DIN 4095 Subsoil, drainage for the protection of structures

DIN 4099 Welding of reinforcing steel

DIN 4226 Aggregates for concrete

DIN 4235 Compacting of concrete by vibrating

DIN 4279 Pressure test for pressure pipes

DIN 18121 Moisture Test

DIN 18122 Consistency Test

DIN 18123 Grading Tests

DIN 18124 Density Test (solid volume without voids)

DIN 18125 Density Test for Soils (including voids)

DIN 18126 Subsoil: Testing procedures and testing equipment, determination of density of non-cohesive soil, and maximum and minimum compactness

DIN 18127 Proctor Test

DIN 18134 Loading Test

DIN 18196 Earthworks soil classification systems and foundations for civil Supervisoring repres-entative purposes

DIN 18201 Tolerances in building: Terminology, principles, application, and verification

DIN 18203 Tolerances in building precast concrete reinforced concrete and prestressed con-crete components

DIN 18330 Masonry works

DIN 18331 Concrete and reinforced concrete

DIN 18332 Natural stonework

DIN 18333 Artificial stonework

DIN 18334 Carpentry

DIN 18336 Waterproofing against moisture

DIN 18337 Waterproofing against pressurised water

DIN 18338 Roofing

DIN 18339 Plumbing works

DIN 18350 Plastering

DIN 18352 Tiling

DIN 18353 Screening works

DIN 18354 Bituminous paving

DIN 18355 Joinery



DIN 18361 Glazing

DIN 18363 Painting works

DIN 18365 Flooring

DIN 18379 Ventilation works

DIN 18381 Sanitary installations

DIN 18550 Mortar

DIN 19531 Unplasticized polyvinyl chloride (PVC-U), socket pipes and fittings for discharge sys-tems inside buildings

DIN 19555 Step irons for single line installation

DIN 19597 Manhole tops A 15

DIN 19695 Direction for transporting and storing of concrete pipes, reinforced concrete pipes, prestressed concrete pipes and fittings and concrete manhole shaft rings

DIN 28600 Ductile Iron Pressure Pipes and fittings, technical specification

DIN 28603 Ductile Iron Pipes and fittings, TYTON Sockets (equivalent to EN 545)

DIN 28610 Ductile Iron Pressure Pipes with sockets and inner cement lining, technical data and application (equivalent to EN 969)

DIN 50049 Documents on material tests: suggestions for the configuration of documents

DIN 52123 Testing of bitumen and polymer bitumen sheeting and felts

DIN 52143 Bitumen roofing felt with glass fleece base

DIN EN 32 Wall hung wash basins

DIN EN 87 Ceramic floor and wall tiles; definitions, classification characteristics and markings

For approval proposed Standards shall be translated into English language. Procedure is de-scribed in 3.1.3.2 Reference Standards.

3.1.14.1.2 German DWA/ATV/DVGW Standards

The regulations referred to have been issued by the GFA-Gesellschaft zur Förderung der Ab-wassertechnik e.V., Theodor-Heuss-Allee 17, D – 53758 Hennef, Germany; but not limited to:

ATV – DVWK - A 124 Planung und Bau von Abwasserpumpanlagen, Juni 2000

ATV - A 127 Richtlinie für die statische Berechnung von Entwässerungskanälen und - leitungen

ATV - A 128 Standards for the Dimensioning and Design of Stormwater Structures in Com-bined Sewers, April 1992

ATV - A 166 Structures for central Stormwater treatment and -retentionConstructive Design and Equipment, November 1999

ATV - DVWK Advisory Leaflet M 176Guidelines and Examples for the Design and equipping of Structures for central Stormwater treatment and -retention, February 2001

ATV - A 111 Guidelines for the Hydraulic Dimensioning and Performance Verification of Stormwater Overflows in Sewers, February 1994

ATV DVWK Advisory Leaflet M 177Dimensioning and Design of Stormwater Overflows in Combined Sewers, Juni 2001

The Standards referred to have been issued by the German Vereinigung des Gas und Wasser-fachs

GW 310/II M Sicherung an Knickpunkten von Druckrohrleitungen



The Standards referred to have been issued by the German Bundesministerium für Verkehr (BMV), FGSV Verlag, Köln, Germany

ZTV Asphalt – StB 94Zusätzliche Technische Vertragsbedingungen für den Bau von Fahrbahndecken aus Asphalt

3.1.14.1.3 EN and ISO Standards

The EN Standards referred to have been issued by the European Comité of Standardisation, but not limited to:

EN 124 Gully tops and manhole tops for vehicular and pedestrian areas; Design require-ments, type testing, marking

EN 499 Classification of covered electrodes for manual metal arc welding of carbon steels, carbon-manganese steels and micro alloyed steels

EN 598 Ductile Iron Pipes, fittings, accessories and their joints for sewerage application

The ISO Standards referred to have been issued by the International Standards Organization, Case Postale 56, CH-1211, Geneva 20, Switzerland

ISO 1106 Recommended practice for radiographic examination of fusion welded joints

ISO 2531 Ductile iron pipes, fittings and accessories for pressure pipelines

ISO 3452 Non-destructive testing-penetrate inspection-general principles

ISO 4179 Ductile iron pipes for pressure and non-pressure pipelines-Centrifugal cement mor-tar lining-General requirements

ISO 6600 Ductile iron pipes-Centrifugal cement mortar lining-Composition controls of freshly applied mortar

DIN EN ISO 12994 Part 1 until DIN EN ISO 12994 Part 8 Corrosion protection of steel by coat -ing and protective layers

3.1.14.1.4 British Standards

The British Standards referred to have been issued by the British Standards Institution, 2 Park Street, London W1A 2BS. List of British Standards referred, but not limited to:

BS 21 Requirements for pipe threads for tubes and fittings where pressure tight joints are made on the threads (metric dimensions)

BS 405 Requirements for uncoated expanded metal carbon steel sheets for general pur-poses

BS 476 Fire tests on building materials and structures

BS 534 Requirements for steel pipes, joints and specials for water and sewage

BS 729 Requirements for hot dip galvanised coatings on iron and steel articles

BS 750 Requirements for underground fire hydrants and surface box frames and covers

BS 1243 Requirements for metal ties for cavity wall construction

BS 1369 Steel latching for internal plastering and external rendering

BS 1387 Requirements for screwed and socket steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads

BS 1485 Requirements for zinc coated hexagonal steel wire netting



BS 3600 Requirements for dimensions and masses per unit length of welded and seamless steel pipes and tubes for pressure purposes

BS 3601 Requirements for carbon steel pipes and tubes with specified room temperature properties for pressure purposes

BS 3692 Requirements for ISO metric precision hexagon bolts, screws and nuts. Metric units.

BS 4131 Requirements for terrazzo tiles

BS 4254 Requirements for two-part polysulphide-based sealants

BS 4315 Methods of test for resistance to air and water penetration

BS 4320 Requirements for metal washers for Supervisoring purposes. Metric series

BS 4504 Circular flanges for pipes, valves and fittings (PN designated)

BS 4870 Requirements for approval testing of welding procedures

BS 4871 Requirements for approval testing of welders working to approved welding proced-ures

BS 4872 Requirements for approval testing of welders when welding procedure approval is not required

BS 5262 Code of practice for external renderings

BS 5499 Fire safety signs, notices and graphic symbols

BS 6323 Requirements for seamless and welded steel tubes for automobile, mechanical and

Supervisoring purposes

BS 6362 Requirements for stainless steel tubes suitable for screwing in accordance with BS 21 ”Pipe threads for tubes and fittings where pressure tight joints are made on the threads”

BS 8213 Windows, doors and roof lights

BS CP153 Windows and roof lights

CESWI Civil Supervisoring Standards for the Water Industry, 6th Edition, UK Water Industry Research Ltd, June 2004, ISBN 1 898920 51 6

CESMM3 Civil Supervisoring Standard Method of Measurement, 3rd Edition, Institution of Civil Supervisors, ISBN 0 7277 1561 5

3.1.14.1.5

For approval proposed Standards shall be translated into English language. Procedure is de-scribed in 3.1.3.2 Reference Standards.



3.1.14.2 Survey Equipment

Listed below are the principal items of survey equipment to be provided by the Contractor. All equipment shall be as good as new, calibrated and with all necessary carrying containers, etc.:

2 No. Precise automatic level including tripods (Wild or similar)

1 No. Total station including tripods, complete with reflectors, poles and brackets (Wild or similar)

2 No. Metric extending levelling staffs with vertical bubble

2 No. 30 m (enamelled or otherwise protected) steel bands

2 No. Wet and Dry bulb thermometers

6 No. 3 metre-ranging rods

2 No. Survey umbrellas with stand

1 No. Sounding chain 1 x 20 m long

6 No. 5 metre steel tapes

2 No. Builders’ spirit levels 1000 mm long

2 No. Hammers 3 kg each

Supply of pegs, crayons, spray paint, nails and all other items required for setting out and meas-uring the work.

The Contractor shall provide the services of two Chainmen for the sole use of the Supervisor and the Supervisor for the whole period of Contract.

3.1.14.3 Site Testing of Aeration Equipment

The following test procedure shall be applied for the performance tests on the aeration systems for each aeration basin, in accordance to DWA/ATV M209:

1) Each of the roots blowers for compressed air supply shall be temporarily tested with its own gearbox and motor to determine that the aeration capacity, the oxygenation capa-city (OC) and the oxygen transfer efficiency (ON) of each system complies with the Technical Requirements and as given in the Schedule of Particulars with the absorbed power not exceeding 85 % of the rating at 50°C ambient temperature. In case a different aeration system is selected, an adequate testing procedure must be foreseen.

2) For each test three measuring points shall be provided, located in accordance to the ex-pected flow. The oxygen intake curves of each measuring point shall be recorded by re-cording instruments. Before assembling the oxygen electrodes shall be faithfully calib-rated above the zero and the saturation value. The calibration shall occur with the use of the connected recording instruments.

3) Before each series of tests is carried out with a fresh filling of water, cobalt salt shall be added to the test tank water to give a concentration of 0.5 mg/l cobalt ion to catalyse the reaction between sulphite ions and dissolved oxygen. The maximum salt concentration shall not exceed 2.0 mg/l.



4) Before starting each test it shall be ensured that the motors and gears have reached op-erating temperature and a constant water temperature is provided.

5) Before each test a solution of sodium sulphite shall be added to the water at a point close to and preferably under the aerator to remove dissolved oxygen from the whole of the test water.

6) Aeration shall take place until oxygen growth is less than 0.2 mg/l during a 10 minute period. The temperature of water shall be measured with a laboratory thermometer and shall be recorded.

7) Out of the recorded oxygen content, values shall be taken in equal temporary steps of 0.1 to 1 minute. A minimum of 50 values shall be taken.

8) The test results shall be determined separately for each measurement point as follows:

a) LegendCS mg/l Oxygen saturation value reached during the testCSS20 mg/l Oxygen saturation value (9.17) at 20°C under normal conditionsCt mg/l Oxygen content at time tDt mg/l Oxygen saturation deficit at time tKT h Aeration parameter at water temperature TK20 h Aeration parameter at 20°C

OC20 gO2/m³/h Oxygen intake under normal conditionsON20 kgO2/kWh Oxygen transfer efficiencyP kWPower intake of aeratorsT °C Temperature of the waterV m³ Volume of the test tankt h time for a deficit decimal step

b) The oxygen saturation deficits at time t (Dt) shall be calculated as the difference between the oxygen saturation value reached during the test (CS) and the oxygen content at time t (Ct)

Dt = CS - Ct

d) The deficits shall be plotted in floating point notation in accordance with the time. If the plotted points do not result in a straight line, the saturation value shall be corrected until the line be-comes straight.

e) The median temperature (T) of the temperatures measured during the test, which shall not oscil-late more than 1°C, the aeration parameters for 20°C (K20) and the one during the test (KT) will allow the calculation of a correction factor for the temperature.

f) The standardised oxygen input under standard conditions (OC20) shall be calculated by the

aeration parameters during the test (KT), the oxygen saturation value at 20°C under standard conditions

g) The average power intake of the aerator (P) shall be calculated from the various readings and the oxygen transfer efficiency will result under consideration of the tank volume (V)



Velocities shall be measured across the floor tank in the direction of the maximum velocity by an integrating velocity meter. Measurements shall be made 1.0 m from the wall, midway between the wall and operator, and as close to the aerator as practicable. The average velocity at any point 380 mm above floor level shall reach 0.30 m/s in any direction.

If surface aerators are installed alternatively to diffused air aeration the a.m. test procedure shall be modified, accordingly. The Contractor shall submit a Method Statement for the approval of the Supervisor.

Therefore each of the surface aerators shall be temporarily tested with its own gearbox and mo-tor to determine that the oxygenation capacity (OC) and the oxygen transfer efficiency (ON) of each aerator complies with the Technical Requirements and as given in the Schedule of Partic-ulars with the absorbed power not exceeding 85 % of the rating at 50°C ambient temperature. In case a different aeration system is selected, an adequate testing procedure must be foreseen.



3.1.14.4 Parameters to be analysed and reported for Plant Operation

ParametersMeasuring Frequency

Daily Bi-daily Weekly Monthly

1. Climatic conditions X

2. Wastewater flows at inlet and outlet of the WWTP X a)

3. Wastewater characteristics (pH, temperature, con-ductivity) at inflow and effluent of the WWTP

X c)

4. Wastewater concentrations (SS, COD, BOD5) at in-flow and effluent of the WWTP

X d)

5. Wastewater concentrations (organic SS, NH4-N, PO4-P) at inflow of the WWTP

X d)

6. Wastewater concentrations (organic N, NO3-N, P tot) at inflow of the WWTP

X d)

7. Wastewater concentrations (heavy metals) at inflow of the WWTP

X d)

8. Wastewater concentrations (SS, organic SS, COD, BOD5) before aeration tanks

X e)

9. Wastewater concentrations (NH4-N, PO4-P) before aeration tanks

X e)

10. Wastewater pollution loads at inflow f), frequency like concentrations

11. Wastewater pollution loads before aeration tanks f), frequency like concentrations

12. Treatment efficiency for the different wastewater pa-rameters

f), frequency like concentrations

13. Volume and weight of screenings and grit disposed off to landfill

g)

14. MLSS, sludge volume and sludge volume index in the aeration tanks

X e)

15. Sludge loading, volume loading, sludge age X f)

16. Sludge volume and sludge volume index of return sludge

X e)

17. Sludge flows (surplus sludge before thickening, raw sludge towards drying beds)

X a)

18. Dry substances concentrations and ignition loss of all above listed

X e)

19. Sludge quantities of all above listed sludge f), frequency like concentrations

20. Sludge quantities (dewatered sludge, sludge leaving the WWTP)

g)

b) continuous online measurement, daily quantity readout

c) if necessary

d) calculated daily average of continuous online measurements

e) 24-hour flow proportional composite sample from automatic sampler

f) qualified grab sample (5 aliquots every 5 minutes taken) with statement of time



ParametersMeasuring Frequency

Daily Bi-daily Weekly Monthly

g) calculated

h) quantity leaving the Plant with statement of date

i) grab sample out of every container leaving the WWTP

j) grab sample with statement of time, during starting up operation every day, after di-gester operation has stabilized every week

k) grab sample with statement of time

(Qualified) grab samples shall be taken shifting the sampling time every day for 1 hour



3.1.14.5 Laboratory Equipment and Furniture

3.1.14.5.1 General

1) The Contractor shall deliver and furnish the laboratory room with sufficient laboratory equip-ment to facilitate the execution of all necessary wastewater and sludge, analyses in accord-ance to the operation control requirements.

2) All laboratory furniture shall be manufactured according to the relevant DIN or acceptable standards. Power supplies shall be in accordance with the relevant VDE (or comparable) directions.

3) The Contractor shall install, calibrate and connect to water or drainage services as neces-sary all such equipment to the satisfaction of the Supervisor. The intake points of the elec-tric supply shall be provided in the same line as the service supply points.

4) Fume cupboards shall be connected to exhaust ducts. Control switches for exhaust fans in-stalled inside the fume cupboards shall be built in full conformity to the system.

5) The Contractor shall supply and assemble parts and materials for adapting the furniture to wall, floor and ceilings and shall deliver detailed layout schemes of service connecting and drainage points as well as schematic wiring diagrams.

6) The Contractor shall submit layout plans for the arrangement of the laboratory furniture in the building to the Supervisor for approval, in accordance to the Contractors Design Pro-posal.

7) All stainless steel items mentioned below that are used in connection with laboratory tests and operations shall be of special stainless steel type, suitable for laboratory use and highly resistant to corrosion.

8) For comprehensive interchange-ability purposes, e.g. spare part stocking, the furniture has to be assembled from standardised components. The widths shall be multiples of 150 mm. The permissible module widths shall be 600, 900, 1200 and 1500 mm for plumbing units, and 450, 600, 900 and 1200 mm for storage cabinets. The laboratory furniture shall consist of self-contained components that can be assembled together. Working heights shall be 900 mm for standing work and 750 mm for sitting work.

3.1.14.5.2 Submittals

The Contractor shall submit a detailed inventory listing the complete laboratory equipment to the Supervisor.

3.1.14.5.3 Chemicals

The Contractor shall provide a sufficient amount of chemicals for carrying out all the required tests after the issue of the Taking Over Certificate.

Chemicals and reagents with storage periods shorter than 1 year shall be supplied in quantities that will be completely used up in the laboratories with the maximum storage life. The Contrac-tor shall submit a complete and detailed list of all chemicals and reagents and the quantities thereof to be supplied by him to the Supervisor for approval prior to placing any order.



3.1.14.5.4 Accessories

The Contractor shall provide and assemble all necessary equipment for cleaning, disinfection, refuse, first aid, fire-fighting, etc., including life vests, life belts and an automatic oxygen life-sav-ing device with casing.

3.1.14.5.5 Manuals

The Contractor shall provide the manuals for all laboratory equipment in Serbian language, in-cluding the relevant standards.

3.1.14.5.6 Laboratory Equipment

The following items shall be included in the Contractors scope of supplies as a minimum re-quirement, spare parts for 2 years operation should be provided after the issue of the Taking Over Certificate.

Item Volume No. Req.

General Laboratory Basic Equipment

Measuring pipettes glass 1 ml 10







Suction flask pipettes 2 ml 3





Full pipettes glass 1 ml 5








Pipettes bulb (ball) 4

Test glasses (Tubes) 16 x 160 mm - pkg. 100 piece 5

Test glasses stand for 12 tubes 5

Feeder machine, complete 0 - 30 ml 4

Feeder machine, complete 0 - 50 ml 4

Bottles NS narrow neck - clear glass 50 ml 15






Spatula 18 / 8 , 210 mm long 5

Double Spatula 18 / 8 , 210 mm long 5

Tweezers 18 / 8 , blunt , 115 mm long 2

Magnetic mixer, with heating 220 Volt 4

Magnetic mixer stick - 30 mm long 10

Magnetic mixer stick - 50 mm long 10

Test tube mixer 2

Hot plate - 180 mm diameter 3

Drip stand - metal (wire) 3

Glass dishes, low form 100 ml 10




Erlenmeyer flask, narrow neck 300 ml 20

Erlenmeyer flask, narrow neck 500 ml 20

Erlenmeyer flask, large neck 300 ml 20

Erlenmeyer flask, large neck 500 ml 20

Brush for funnels 4

Brush for test glasses 4

Brush for Erlenmeyer flasks 4

Brush for glass dishes 4

Brush for glass dishes 4

Brush for sedimentation vessels 4

Balloon with plastic tap 10 l 2

Balloon with plastic tap 60 l 3

Narrow neck bottles PE 250 ml 30



Large neck bottles PE 250 ml 20



Measuring (graduated) cylinder, high form 10 ml 10


Measuring (graduated) cylinder 100 ml 10



Felt pen - Black 6

Felt pen - Red 6




Felt pen - Blue 6

Distillation apparatus 4 l with reserve vessels 2

Water Bath (0-100°C) 1

Suction Pump 1

Buchner Funnel 300 ml 5

Automatic Sampler

Automatic sampling equipment with refrigerator and battery, AC/DC - op-eration and rechargeable. 24 bottles for 24 hours, suitable for batch and composition samples and to be connected with influent flow-meter

2

Manual Sampling

Sampling stick 3.5 m long 3

Sampling ladle, one piece 1000 ml 3

Sampling ladle, two pieces 1000 ml 3

Basket, metal wire 3

Transport vessels, plastic 2000 ml 12

Bucket with handle and drain 10 l 10

Measuring dish, plastic 1000 ml 5

Measuring dish, plastic 2000 ml 5

Water Flow Controlling

Colouring agent (pigment) 500ml./UGG yellowish-green 500 ml 1

Colouring agent pigment 500 ml. RBR blue-red 500 ml 1

Temperature Measurement

Water - Ladle Thermometer 1

Substitute Thermometer 2

Plastic rope 8 m long 2

Floating Thermometer 2

Outside Thermometer 2

Max. Min. Outside Thermometer 2

Room Thermometer 2

Pocket Thermometer 2

Chem. Thermometer 0 – 100°C 2

Digital Thermometer 2

Settleable Solids

Sedimentation vessels, PVC 1000 ml 12

Sedimentation vessels, glass 1000 ml 6

Intake stand, PVC 3

Stop watch 120 min. 2

Viscose cleaning swam 3

Oil – Detection

Oil test paper 320 2




Putrescibility

Methylene blue - Test bottles 10

Methylene blue - Solution 0.05% 1

Drip bottles with label Methylene blue 1

Indicators

Universal - Indicator - Paper pH 1 - 12 4

Substitute package / 3 rolls pH 1 - 12 2

Special Indicator paper pH 3.5-6.8 2

Special Indicator paper pH 5. 0 - 8. 0 2

Special Indicator paper pH 7. 0 - 10. 0 2

Substitute package / 3 rolls, pH 3.5-6.8 2

Substitute package / 3 rolls pH 5. 0 - 8. 0 2

Substitute package / 3 rolls pH 7. 0 - 10. 0 2

Test sticks "Hardness" 2

Test sticks "Ammonium" 2

Test sticks "Nitrite" 2

Test sticks "Nitrate" 2

pH Measurement

Portable (Pocket) pH -meter, (pH 96A / Set) 2

pH – meter, (pH 196 with temperature control digital) 3

pH – Measuring Chain (E 50 - 1.5) 2

Measuring pen (TFK 150 - 1.5) 2

pH – Electrodes, pieces 4

BOD5 – Measuring Instruments

BOD5-Instruments and equipment for Dilution Method. 2

BOD5 - Measuring instrument manometric, 6 places 3

BOD5 - Thermostat cupboard 370 l (air incubator) 2

Allyl urea (ATH) 2

Feeder – machine for ATH 2

Oxygen Measuring Instruments (DO-Measurement)

Oxygen/Temperature Measuring Instrument (e.g. OXI* 92/Set) 3

Microprocessor-O2-Measuring Instrument (e.g. OXI* 196) 3

Oxygen – Electrode (e.g. EO 196-1.5) 6

Electrical Conductivity (EC) Measuring Instruments

Pocket Portable EC - Measuring Instrument (e.g. LF 92/SET) 2

Sludge Sampling

Sludge Siphon up to 12 m depth 2

Sludge – CO2 - Determination

CO2 determination equipment (Richter) 2

Dry Solids Content




Hygrometer, for solid and moisture content ORI* - mat 2

Aluminium Foil 2

Foil- Forming equipment 2

Sludge – Volatile Solids

ORI* - high speed - incinerator 2

Crucible 75 ml 30

Crucible pliers 18/8 3

Microscopes

Microscope Primus monocular, Stage 10 x, 40, 100 objectives 1

Cross - Table 1

Microscope binocular with phase contrast - equipment 1

Cupboard closeable 2

Covering glasses package /100 piece (Slides) 2

Covering glass tweezers (Slides) 3

Drip pipettes with rubber cap 4

Photometric Determinations

Refrigerator 185 l lockable 1

Dispersing machine 3

NANOCOLOR* photometer 300 D 3

NANOCOLOR* thermoreactor R-2T 3

NANOCOLOR* security box 3

NANOCOLOR* test tubes Ammonia 50 4

NANOCOLOR* test tubes COD 160 4



NANOCOLOR* test tubes Nitrate 50 4

NANOCOLOR* test tubes Nitrite 2 4

NANOCOLOR* test tubes Phosphate 50 4

NANOCOLOR* test tubes Phosphate 1 4

Digital flask pipette 1.0-5.0 ml. 3

Digital flask pipette 0.2-1.0 ml. 3

Plastic cap for 1.0-5.0 ml. Pipette 3

Plastic cap for 0.2-1.0 ml. Pipette 3

Plastic stand for 3 flask pipettes 3

Total Nitrogen

Nitrogen - Sample preparation with Microwave 1

Instruments

Dissolved Oxygen (DO) Meter 3

Portable (battery), digital temperature measurements required

Oxygen measurement range 0-19, 99 mg/l




Accuracy ± 5% of measured value at constant temp.

Quick calibration, free of zero current.

Automatic temperature compensation.

Automatic atmospheric pressure correction by integrated pressure sensor

Temp, measurement range - 5 to + 45° C, accuracy ± 0.2°C

Spare DD electrodes 5

Cable length 5 m.

Calibration and maintenance kits.

Residual Chlorine Comparator 2

Range 0 - 3.5 mg/l

Subdivision 0.1

To be used with DPD 4 tablets.

DPD4 tablets (100 tablets in each pack.) pack 3

Water Still 2

220 V / 50 Hz.

Capacity 4 l/h

Thermostatic cut – off

Metallic evaporation compartment and condenser.

Analytical balance 2

Digital, 220 V, suspended pan.

Range 0-200g, readability 0.1 mg.

Precision 0.05 mg.

Built in weights.

Pan Dia x Box H 9 x 18 cm.

Drying Oven 2

200V, 1200 Watts, max. temp. 250°C.

Mechanical conversion.

Sensitivity +0.25 °C

chamber dimension W = 33 cm, L=36 cm, H=33 cm

Filter paper 20

GFC, 100 papers in each box.

Diameter 9 cm.

Electric hot plate 2

220 V, 600 Watts.

Surface area 225 cm²

Max. temp. 510 °C

On/Off switch.

COD reactor HACH* or equivalent 2

220 V, micro samples, for 16 samples.

Reagent Vials for COD Tests to fit a.m. reactor 20

Disposable (box with 25 vials)

Forceps for crucibles (Length 50 cm) 2

Forceps for crucibles (Length 20 cm) 2




Markers for crucibles, Heat resistant 5

BOD Bottles with caps, with sealing water tip. 300 ml 60

Dessicators 4

non - vacuum, D = 300 mm, H = 300 mm

with porcelain plates

Burettes + Container (500 ml) 5

Volume 25 ml, Subdivision 0.1


Volume 10 ml, Subdivision 0.1


Volume V ml, Subdivision 0.05

Automatic, Pyrex glass type zero, mark sets in

automatically, complete with rubber bulb.

Beakers (glass) 1000 ml 24




Beakers (transparent plastic) 1000 ml 12




Reagent bottles (Amber glass) 1000 ml 12



Plastic bottles for washing 500 ml 6

Glass bottles for dropper 100 ml 12

Funnels (glass), D = 10 cm, stem = 10 cm. 12

Filter paper Watman 40/42, (100 filter/packet), Packets 30

Filter paper Watman, diameter 15 cm, (100 filter/packet), Packets 30

3.1.14.6 Workshop Equipment

3.1.14.6.1 General

1) The Contractor shall deliver and furnish the workshop room with sufficient equipment for common electro-/mechanical services, in accordance to the operational requirements of the WWTP.

2) The Contractor shall submit a detailed inventory listing the complete workshop equip-ment to the Supervisor.

3) For comprehensive interchange-ability purposes, e.g. spare part stocking, the furniture has to be assembled from standardised components. The widths shall be multiples of 150 mm. The permissible module widths shall be 600, 900, 1200 and 1500 mm for



plumbing units, and 450, 600, 900 and 1200 mm for storage cabinets. Working heights shall be 900 mm for standing work and 750 mm for sitting work.

3.1.14.6.2 Consumables

The Contractor shall provide a sufficient amount of consumables (lubricants, oil, solvent, paint, etc.) for carrying out all the works for a period of 1 year after the issue of the Taking Over Cer-tificate. The Contractor shall submit a complete and detailed list of consumables to be supplied by him to the Supervisor for approval prior to placing any order.

3.1.14.6.3 Accessories

The Contractor shall provide and assemble all necessary equipment for cleaning, first aid, fire-fighting, etc., including life vests, life belts and an automatic oxygen life-saving device with cas-ing.

3.1.14.6.4 Manuals

The Contractor shall provide the manuals for all main workshop equipment in English and Ser-bian language, including the relevant standards.



3.1.14.6.5 Equipment

The following items shall be included in the Contractors scope of supplies as a minimum re-quirement, spare parts for 2 years operation should be provided after the issue of the Taking Over Certificate.

Position/ Description No. Req.

Furniture

Workbench, steel 1Working surface, wood, plate 50 mm thick, with safety back edge. Equipped with 9 drawers-unit and 4 open shelves. Length 3000 mm Height 850 mm Width 700 mm

Tool trolleys 2

Tools

Electro-pneumatic-drilling hammer including spare parts, 1000 W 1

Hand drillers (2-speed), 600 W, including spare parts. 2




Driller SDS-plus-hammer, rawl plug driller (mills) for pneumatic drilling hammer. 1 setrequired mills: 3 6 mm, 50 mm working length 2 8 mm, 100 mm working length 1 8 mm, 200 mm working length 1 10 mm, 150 mm working length 1 12 mm, 200 mm working length 1 14 mm, 150 mm working length

Battery operated screw driver 9-18 V with different chucks. 1

Universal holder with permanent magnet, rechargeable with charging device. 1

Electro-angle Grinder, 210 W, including spare parts 1 3 Grinding discs 3 stone cutting discs 3 Metal cutting discs 2 cup wire brush 1 hand protector

Circular Hand Saw, 1600 W, cutting depth minimum 65 mm equipped with: 1 1 saw blade with point teething, chrome. 1 Saw blade with wolf teething

Jig saw blades pro/set 5s 1 1 x T 101 B 1 x T 119 A 1 x T 119 BO 1 x T 101 A 1 x T 127 D 1 X T 118 G 1 x stress tearing protector 1 x coolant container




Double - Ring - spanner cranked (angulate) 3 sets6 x 7, 8 x 9, 10 x 1112 x 13, 14 x 15, 16 x 1718 x19, 20 x 22, 21 x 2324 x 27, 25 x 28, 30 x 32

Double- ring Spanner Cranked sizes: 30 – 40

1 set

Pull-Ring- Spanner SetSizes: 24-46

1 set

Open-ended spanner sizes: 6 – 32

3 sets

Sockets, ¼” 26-pieces set in steel box 2 sets4, 4.5, 5, 5.5. 6, 7, 8, 9, 10, 11, 13

Screw driver sockets plain slot 4, 5.5Screw driver sockets cross slot 1, 2.

Sockets ½” 24 -s set in steel box, drives 10-32accessories: Reversible ratchet with gum handle

2 sets

Imbus – screw drivers in steel boxdrives : 5 – 17

1 set

Torque wrenches ½” ½” tool take-up 30-150 Nm and Automatic quick release

1 set

Torque wrenches 3/8”, 30--50 Nm. 1 set

Adjustable wrenches 3 sets

Hook wrench for C- and B-tubes (hoses) 5

Square drive socket 2

Band wrench 1

Spark plug wrench, 21 mm 1

Cross wrench 1

Joint handle 1/2 L cm, 600 mm 1

Screw driver set, 6s 2 sets

Screw driver chrome-vanadium sizes: 4, 5, 7, 9, 12 mm with hexagonal key sets

3 sets

Cross slot screw drivers- set, chrome-vanadiumsizes: 1, 2, 3, 4 mmwith hexagonal set

3 sets

Hexagonal key set sizes: 2, 2.5, 3, 4, 5, 6, 7, 8, 10.

1 set

Spiral (screw) driller, tips, sortiment HSS : 0.5 – 10 mm 2




Mallet 100 g 2

Mallet 50 g 2

Mallet 1000 g 1

Mallet 1500 g 1

Builder’s hammer 200 g , wood handle 2

Builder’s hammer 400 g, wood handle 2

Builder’s hammer 500 g, wood handle 2

Measuring Tools

Spirit level 1 m long, aluminium 1

Spirit level 2 m long, aluminium 1

Calliper clamp 3 different ranges 300/210/100 mm 3 sets

Angle measuring tool 0-180 1

Pens, 20s 1 set

Precise micrometer 2

Steel scale, 1 m long 1

File sets different lengths 200 mm, 300 m, 120 mm, 145 mm 5 sets

Punch set in steel box, sizes: 2, 3, 4, 5, 6, 8, 10 2 sets

Aligning (drift) punch set 2 sets

Punch and chisel sets, sizes: 126 x 18.5 1 set

Punch and chisel sets, sizes: 250 x 28 1 set

Tap and Die Nut Sets

Standard Tap and die sets (metric) 1 set

Bearing/ Wheel and Puller

Standard bearing puller set including following parts: 1 set 1 two jaw spread width 80 mm 1 two jaw spread width 160 mm 1 two jaw spread width 250 mm 8 inside removal spread width 12-70 mm

2 counter stay: 1 pulling chuck spread width 5-32 mm 1 special puller spread width 55 mm

3 jaws with 3 different sizes 3

Removal clamp 2




Other tools and Instruments

Pinch and pointed end crow bars, 1.0 m long 2

Metal shovels with wood handle. 10

Shovels for sand. 10

Street Brooms with handle (stick) 10

Hand broom and sweeping shovels 10

Water broom with stick 10

Rubber buckets, 10 l 3

Spades fork 3

Felling axes, 800 g with handle 1

Axe, 1.6 kg with handle 1

General purpose hand saws 2

Filling knives - set with different bladesWidth: 30, 50, and 70 mm

5

Gypsum beaker, gum (rubber) 2

Wire brushes, steel, 4 rows 5

Drum opening tool for oil drums 1




Ladder

Stand ladder, double sided system 5 steps, aluminium 2

Platform ladder, height 2.00 m aluminium 1

Safety Tools / Equipment

Portable oxygen deficiency monitor with all accessories 1

Dangerous gases detector with alarm, for H2S gas monitoring including 1 NiCd supply unit and 1 recharging device.

1

Warning lamp for openings including battery and charging unit. 4

Safety belts 3

Slide – chuck 2

Safety belts, 20 m long 11

Tripod, light weight aluminium with telescopic legs 2

Rescue stick 10

Self-reeling fall arrester 2

Safety hand lamps / safety inspection lampswith 10 m long cable

2

Battery operated Hand flood lights with NiCd and charging unit

2

Cable reels, steel with power outlet sockets, for 50 m cable, 220 volt 4

As above for 380 volt - cables 4

canal / sewer mirror 1

Rubber (dritex) trousers universal sizes 2

Halogen flood light, 220 volt with tripod adjustable 0.5 to 2 m. 1

Halogen flood light, 24 volt with adjustable tripod 1

High impact goggles for eye protection 4

Ear defenders for ear protection (headphone type) 10

Gas masks / respirators for protection against A, B and C gases and Vapours. 3

First aid plaster kits according to DIN 13169 type E 3

Life preserves with all accessories as specified 12




Cleaning Equipment

Hot water industrial pressure washers 2

Water flow rate: 500 - 1200 l/h

Working pressure 30-150 bars

Capacity 6.9 kW

Fuel container 25 l

Chemical tank 2 x 20 l

including accessories

Multi-purpose vacuum cleaner/ wet and dry vacuum cleaner 1

Air volume: 55 l/sec.

Vacuum: 220 m bar

Capacity: 60 l

Motor: 1000 W

including accessories.

Very high speed portable blower/cleaner > 500 W (230 volt), including all necessary accessories.

2

Wet/ Dry vacs , vacuum cleanerAdjustable height and mobile chassis

1

Spare parts / accessories for all cleaners 1 set

Electro-Workshop – Furniture

Heavy duty industrial cupboard with the following descriptions: 2

H x W x D = 1900 x 1000 x 590 mm

Back panel set

Drawer unit 4 drawers

Industrial mobile cabinets with 4 drawers 2

Electro-Workshop – Equipment

Canvas tool bag, leather, all edges are supported with aluminium plates. 2

Industrial multi-meter for AC and DC, ampere-meter supplied with test leads 1

Multi-range insulation tester with accessories 1

Digital industrial multi-meter 1

Voltage (mV to 1000 V)

Ampere (mA to 10 A)

DC V (mV - 200 V)

DC Current (mA - 10 A)

Ohm (1 to 10 m )

Adapter for temperature.

diode test

conductivity with buzzer




Analogue industrial multi-meter 1

Voltage (mV to 1000 V)

Ampere (mA to 10 A)

DC V (mV - 200 V)

DC Current (mA - 10 A)

Ohm ( 1 to 10 m )

Adapter for temperature.

diode test

conductivity with buzzer

Voltage tester 2 poles, testing range 4.5 – 380 V, AC/DC, with lighting indicator. 2

Universal voltmeter 4.5 - 380 V for direct and alternate current 1

Amperage tester (0 - 60 A) 1

Amperage tester (0 - 20 mAa) 1

Digital AVO clip-meter 1

AC current and voltage 1 – 1000 A, V.

Ohm 0 – 40 k

0 – 100 kW

0 – 1000 Hz

with leather case and battery

Flat nose pliers 2

Flat nose pliers 45 2

End of Section
