Design and Build of five (5) Wastewater Treatment Plants and one Chemical Storage at Thermal Power Plant of Kosovo B, in Kosovo

New clarification added: Question 6:In the scope of WWTP-B it is foreseen that treated water is reused in the process. From the information available it is not clear where the point of delivery of treated water is in terms of location as well as elevation. Further it is not described at what level of pressure the water must be returned to at the point of interface. To ensure equal conditions for all bidders, please provide the required information about the location of transfer, including height, as well as the required pressure at that location.Answer 6 : Please refer to the Employer’s Requirements, Volume 5.3.3 – Arrangement Plan of WWTP-B, together with Volume 5.3.1 – Overall Arrangement Overview, for the available Tender-stage layout information for WWTP-B.Annex I identifies the future disposition of treated effluent from the HFO-polluted and oily wastewater streams treated at WWTP-B as “Re-utilization or Sitnica River.” However, the Tender Documents do not establish a fixed treated-water reuse delivery point, elevation or required pressure at the interface. Annex I – TPP Kosovo B Wastewater Background Information, Section 3.5 - Table 3Accordingly, the Contractor shall develop the treated-water reuse arrangement as part of the detailed design, including the required flow, pressure/head, routing and final connection point, in coordination with UNOPS/KEK and based on the verified existing site conditions and interfaces.The Contractor shall include all necessary piping, valves, pumping/pressure-boosting equipment, metering, supports and associated connection works required to provide a complete and operational treated-water reuse system.

New clarification added: Question 2:Clarifications about V3-Technical specification2.1. Section 5 – existing wastewater networkThe specification states that existing wastewater networks will be cleaned and maintained by the power plant operator and were planned to be completed in 2021.Please confirm the current status and condition of all existing wastewater networks to be reused, including the scope and completion status of cleaning and maintenance works by the power plant operator.2.2. Section 6.1 – Existing equipment/infrastructureThe Contractor is responsible for repairs and refurbishment of existing equipment/infrastructure to be reused, including deterioration such as erosion and corrosion, but the extent of deterioration is not quantified.Please provide condition assessment reports for all existing equipment/infrastructure to be reused and define the Contractor’s maximum/defined scope of refurbishment and repair.2.3. Section 6.1 – Existing equipment/infrastructureThe Contractor is responsible for modifications and repairs to other existing equipment affected by construction, without a clearly defined boundary of responsibility.Please provide a detailed interface/limit-of-responsibility matrix identifying all existing equipment and systems included in the Contractor’s responsibility.Answer 2 : 2.1 Current conditionFlushing and cleaning of the existing network has been carried out and is still ongoing by the Employer/KEK side. However, a complete CCTV survey of the network had not been finalized when the Tender information was prepared.The Contractor shall carry out any additional flushing or cleaning required, together with CCTV inspection and smoke/dye testing during the design stage.Annex IV provides the available information on ageing sections, partial blockages, sedimentation and areas where CCTV verification is still incomplete.2.2 Reuse and refurbishmentAnnex IV provides the available information on the condition and constraints of the existing network, but it should not be considered a complete structural condition survey.Any existing pipelines or chambers proposed for reuse shall be inspected and verified by the Contractor. Where an element is found to be structurally unsound, hydraulically inadequate or unsuitable for the final design, it shall be rehabilitated or replaced as necessary.2.3 Interface and responsibilityThe Contractor is responsible for verifying the interfaces with the existing network and for delivering a complete and operational system.Existing KEK networks will remain in operation. The Contractor’s scope therefore includes the required connections, temporary bypass arrangements, verification, and any necessary rehabilitation or replacement needed to complete the Works.Question 3:In the scope of WWTP-B steam available at the location of the power plant shall be utilized for heating process chambers. No further information is presented regarding the characterization of the available steam on site. Please provide a description outlining the available amount of steam as well as the characteristics of this steam which the bidder can utilize for heating of process chambers. Further, please indicate the location of a possible interface for drawing off the steam. If an additional piping system is required for transfer of steam towards the location of the new treatment plant, please also indicate the requirements imposed on this piping system.Answer 3 : The Contractor shall determine the steam demand for its proposed process and verify the available steam conditions and suitable connection point within TPP Kosovo B during the detailed design, in coordination with UNOPS/KEK.The Design & Build scope shall include all works required from the agreed connection point to WWTP-B, including the necessary piping, valves, controls, supports, insulation, drainage/steam traps, instrumentation and testing required for a complete and safe installation.Question 4:When using steam for heating the process units in scope of this project, condensate will form depending on the selected setup as well as steam at a lower pressure/temperature level. Please give precise information about the requirements for depleted steam generated from heating the process units which form part if this project. In detail, please indicate the precise location where depleted steam or condensate shall be directed to after utilization. We propose to add the generated condensate directly into the water purification process where condensate could be formed since it is expected to have comparatively small amounts of condensate.Answer 4 : As noted the Tender Documents do not define a specific connection point or destination for condensate or flash steam produced by the WWTP-B heating system. Consequently, the Contractor is responsible for designing the condensate and steam-handling system during the detailed design phase. This should be based on the chosen heating system and confirmed existing plant interfaces, in collaboration with UNOPS/KEK. Introducing the generated condensate into the wastewater treatment process can be considered if the Contractor proves that the condensate's quality, temperature, and quantity are compatible with the proposed treatment process and will not negatively impact treatment performance, equipment, or plant operations. The Contractor’s Design & Build scope must include all necessary condensate piping, steam traps, flash-steam handling, valves, instrumentation, and related connection works for the chosen solution.Question 5 : Please indicate what characteristics of service water are available in the locally available service water network. Please indicate the available capacity of service water for utilization within our treatment processes as well as the available pressure within the service water network on the site. Further, please indicate how the service water network is designed at the existing station (pipe bridges, pipe network below ground, …) and the location of the respective network from where attachments can be made.Answer 5 : Please refer to the Employer’s Requirements, Volume 5.1 – Existing Drawings, for the available information regarding the existing TPP Kosovo B infrastructure and networks.The available drawings include:V5.1.1 – Overall Layout Plan of PPV5.1.2 – Layout Fire Fighting NetworkV5.1.3 – Layout Rainwater and Neutralised Wastewater NetworkV5.1.4 – Layout Sewage NetworkThese drawings provide the available Tender-stage information on the existing plant layout and utility infrastructure.The Tender Documents do not provide additional guaranteed information regarding the service-water quality, available capacity, operating pressure, or a dedicated service-water connection point. These parameters and the final connection arrangement shall be verified and coordinated with UNOPS/KEK during the detailed design stage.

New clarification added: Appendix 3-A – Mechanical RequirementsQuestion 1.1. §2.1, Piping and Valves, p.5; §2.2, Piping Systems, p.6The text states that necessary WWTP piping shall be stainless steel or UV-stabilised PE, while §2.2 subsequently specifies corrosion allowance for carbon-steel and low-alloy piping.Please clarify whether carbon-steel and low-alloy piping are permitted. If so, please provide the applicable services/material selection criteria.Answrer 1.1 Piping MaterialsThe requirements of §2.1 apply: WWTP piping shall be suitable stainless steel or UV-stabilised PE, subject to the specific stainless-steel requirements for chemical piping, sludge piping and piping subject to mechanical stresses. The corrosion allowances for carbon-steel and low-alloy piping in §2.2 are general design provisions and do not override the material requirements of §2.1. Carbon-steel or low-alloy piping may be proposed for services where the Employer’s Requirements permit suitable material selection without prescribing a specific material. Its suitability for the medium, operating conditions, corrosion environment and design life shall be demonstrated during detailed design and submitted for UNOPS review. This does not authorise substitution where a specific material is prescribed.Question 1.2. §2.1, Piping and Valves, p.5HCl piping is specified as stainless steel, but HCl concentration, temperature, pressure and stainless-steel grade are not stated.Please provide the HCl concentration, operating/design temperature, pressure and required material grade for HCl piping, valves and wetted components.Answer 1.2 — HCl PipingNo fixed HCl concentration, operating/design temperature, pressure or stainless-steel grade is specified in §2.1. The Contractor shall establish these parameters based on the proposed process, chemical storage/dosing arrangement and chemical supply conditions. The stainless-steel requirement in §2.1 remains applicable. The Contractor shall demonstrate the suitability of the selected grade and the chemical compatibility of all piping, valves, fittings, seals and other wetted components under the proposed operating and design conditions, supported by corrosion data and manufacturer recommendations. The reference to stainless steel does not imply that any stainless-steel grade is suitable for HCl service. The Tender Price shall include the complete HCl handling and piping system required by the Employer’s Requirements and the proposed treatment solution. Detailed design documentation shall be submitted after award through the applicable UNOPS design review stages.Question 1.3. §2.2, Piping Systems, p.5For all main and auxiliary piping systems, separate lists of pipes, valves and fittings with individual material, type, design and operation characteristics shall be submitted. Piping dimensions and thickness calculations, based on the applicable Standards as well as the medium velocities into any piping.Each piping system shall be laid out, supported guided and anchored, so as to preclude excessive thrusts, or stresses, due to the combination of all relevant forces resulting from the relevant fluid operating parameters, thermal expansion, weight and from any other possible source (wind, etc.).Please clarify whether the bidder needs to submit these documents as part of the tender offer or whether, after award, the contractor must submit them to the project as part of the main execution design.Answer 1.3 — Piping DocumentationFully developed pipe, valve and fitting schedules, wall-thickness and velocity calculations, and support/anchor designs are not required at Tender stage. The tender submission shall comprise a conceptual technical proposal supported by the Approach and Method Statement, demonstrating compliance with the Employer’s Requirements. It is not the formal 30% Concept Design. After award, the Contractor shall prepare and submit the detailed piping documentation through the applicable design and UNOPS review stages.Question 1.4. §2.2, Piping Systems, p.6All piping shall be hydrostatically tested at the manufacturer’s workshop, while certain piping is also to be tested after site erection.Please clarify the hydrostatic testing philosophy for shop-fabricated spools, site-fabricated piping and field welds, including test pressure, hold time, test medium and governing code.Answer 1.4 — Hydrostatic TestingThe requirements of §2.2 remain applicable. All pipes shall be hydrostatically tested at the manufacturer’s workshop. Steam, feedwater and condensate piping shall additionally be hydrostatically tested after erection at Site, at the pressure required by the applicable standards. The Contractor shall prepare testing procedures covering shop-fabricated spools, site-fabricated piping and field joints and welds. These shall define the governing code, test pressure, hold time, test medium, test boundaries and acceptance criteria for each system, in accordance with the specified requirements, design conditions and materials. The procedures and Inspection and Test Plans shall be submitted for review before testing. No single test pressure or hold time is prescribed by this clarification for all piping systems.Question 1.5. §3.4, Welding Testing and Control, p.9The specification permits radiographic or other NDT methods but does not define the required NDT percentage/extent by weld category.Please provide the required NDT extent (%) for each weld category and specify the applicable method and acceptance criteria (RT, UT, MT, PT, etc.).Answer 1.5 . NDT RequirementsSection 3.4 does not prescribe numerical Non-Destructive Testing (NDT) percentages by weld category. The inspection extent, methods and acceptance criteria shall comply with §3.4 and the applicable welding and piping standards, taking account of the material, service, design conditions and weld type. The provisions of §3.4, including the reference to JUS C.T3.051 for radiographic control and reporting and coordination with the supervisory body appointed by the Contracting Authority, remain applicable. After award, the Contractor shall submit welding and NDT procedures identifying the inspection extent, methods and acceptance criteria for each weld category, together with the relevant Quality Plan and Inspection and Test Plans, for review before fabrication. The Tender Price shall include all welding inspection and NDT required by the Employer’s Requirements and applicable standards.Question 1.6. §5.5.5, Painting Procedure 5, p.14Each of three epoxy layers is stated to have a minimum DFT of “200mm”, while the stated total minimum DFT is 600 μm.Please confirm that the intended requirement is 200 μm per layer, resulting in a total minimum DFT of 600 μm, rather than 200 mm per layer.Answer 1.6 — Painting Procedure 5Confirmed. The reference to “200 mm” in §5.5.5 is a typographical error. The intended minimum dry film thickness (DFT) is 200 μm per epoxy layer, giving a minimum total DFT of 600 μm for three layers.

New clarification added: Question 1 :  ADDENDUM No. 01 TO THE EMPLOYER’S REQUIREMENTS, requires each Bidder to develop its own design basis, including influent flows, pollutant concentrations, loads, and peaking factors. As a result, proposals may be based on significantly different assumptions, which could place Bidders using more conservative and technically robust design criteria at a disadvantage. To ensure that all proposals are prepared and evaluated on a consistent basis, please provide a common and mandatory set of Design Influent Parameters for each WWTP. If this is not possible, please clarify how the technical and financial proposals will be compared to ensure a fair and transparent evaluation. Please also confirm that the Contractor’s performance guarantees will apply only when the actual influent conditions remain within the declared and accepted Design Influent Parameters. In addition, please clarify how any exceedance of these parameters will be addressed under the Contract.  Question 2 ADDENDUM No. 01 TO THE EMPLOYER’S REQUIREMENTS, added several new requirements that should be addressed in the tender submissions by the Bidders, which in fact make necessary the submission of design information (plant layouts, process flow diagrams, process calculations, etc) in the Technical Proposal. Please clarify the required level of design development and technical detail for the Technical Proposal to be submitted at the tender stage. In particular, please confirm whether the submission is expected to constitute a conceptual proposal or a preliminary design. Please also provide a list of the mandatory technical deliverables to be submitted at the tender stage, taking in consideration the new requirements from Addendum no 1.Response to Question 1: The baseline information is included in the Tender Documents. Each bidder must utilize this data to develop and justify their proposed design basis for WWTPs A–E, covering flows, pollutant concentrations, loads, and peaking factors. All specified Employer’s Requirements remain applicable.Proposals will be evaluated based on published technical criteria, with an 80% technical and 20% financial weighting. Only technically compliant proposals that meet the minimum technical threshold will advance to financial evaluation, which considers the total Design & Build Contract Price. Performance guarantees will apply as per the Employer’s Requirements and the Contract; they are not automatically limited to the Bidder’s declared parameters. Any exceedance will be documented and assessed by the Employer’s Representative under the relevant contractual provisions, and will not automatically release the Contractor from obligations or entitle additional time or payment.Response to Question 2:The tender-stage submission must include a conceptual technical proposal supported by a project-specific Method Statement, providing enough information to demonstrate compliance with the Employer’s Requirements. The full design will be developed by the successful Contractor after award through the required UNOPS design stages. Therefore, the tender submission is not the formal 30% Concept Design submission. For WWTPs A–E and the Chemical Storage facility, the submission should include: Proposed processes, technologies, and justified design assumptions.Indicative process flow diagrams and layouts.Main equipment, capacities, and preliminary supporting calculations.Guaranteed effluent quality and applicable performance commitments.Methodology for design, permitting, construction, commissioning, and UNOPS design reviews.Programme, phasing, and project risk register.Training, handover, and Defects Notification Period arrangements.Ten-year operational resource quantities, excluding financial values.Project-specific quality, health, safety, environmental, and social management plans. 

New clarification added: Question :  Dear Sir/Madam,With reference to the above-mentioned RFP, we kindly request UNOPS to consider granting an extension of the deadline for submission of proposals.Following our detailed review of the solicitation documents, including the Employer’s Requirements, Technical Specifications, Drawings and available background information, we note that the scope of the procurement involves a considerable level of technical complexity and requires careful coordination of various technical, commercial and contractual aspects.The preparation of a complete and responsive proposal requires a thorough assessment of the technical requirements, coordination with specialized equipment manufacturers, suppliers and subcontractors, evaluation of the proposed technical solutions, preparation of the required methodologies and supporting documentation, and collection of firm and competitive quotations.Considering the complexity and multidisciplinary nature of the Works, we respectfully request UNOPS to consider extending the current proposal submission deadline in order to provide offerors with sufficient time to complete the necessary assessments and prepare comprehensive, technically compliant and commercially competitive proposals.We believe that allowing additional time for proposal preparation would contribute to the quality and completeness of the proposals received and support effective competition within the procurement process.We would highly appreciate UNOPS’s favorable consideration of this request and kindly ask to be informed accordingly should an extension of the proposal submission deadline be granted.Answer : Thank you for your interest in RFP/2026/63431 and for your request.UNOPS has carefully considered your request. The solicitation was launched on 17 August 2026, which gives Offerors a proposal preparation period of 70 calendar days. This period was set with the scope and technical complexity of the Works in mind. Offerors have also had two mandatory site inspections (31 August and 25 September 2026) and a clarification period extended to 2 October 2026.UNOPS therefore regrets that it is unable to grant an extension. The deadline for submission of proposals remains as is , as stated in the solicitation documents. Any change to the solicitation documents will be communicated to all Offerors by formal amendment.

New clarification added: Question 1:As part of WWTP-C of the plant, a station for treatment of the rain water collected at the coal yards is foreseen. The location of this system is indicated on the general arrangement drawing only figuratively through one photograph. Please provide the bidders with plans outlining the available area for provision of this treatment station. Please include as much geodetic quotas for the respective areas as possible to allow for the bidders to design an effective and efficient treatment station. Further, please include information about access roads and existing infrastructure in the vicinity of this location.Question 2:To facilitate the preparation of comparable offers from all bidding parties please provide an estimation of the quality of the oil contents and oil fractions for WWTP-B HFO polluted water from the HFO pumping pits. Depending on the stated input concentrations we want to make you aware of the fact that it might be technically impossible to generate water with an oil concentration of 15 mg/l or less at the outlet of the plate oil separator. Thus, please clarify for what inlet specifications (oil content and droplet fractions) the guarantee of 15 mg/l oil content will be applied.Question 3:Please provide us with the remaining design drawings.The Terms of Reference (ToR) document mentions drawing  V5.3.8 – Arrangement plan of chemicals storage building (all 19 drawings MISSING — not in project files).Answer 1 : Refer to V5.1.1 – Overall Layout Plan and V5.3.5 – Arrangement Plan of the WWTP-C Coal Yard for the current information available at the tender stage. The locations indicated in the Employer’s Requirements are for guidance only. Detailed coordinates, elevations, and geodetic levels are not yet available, as a high-precision geodetic/topographical survey of the project area, including the WWTP-C Coal Yard and a 50-meter buffer zone, is underway under a separate Employer contract. This survey is expected to be completed by the end of October 2026, and the results will be provided to the awarded Contractor for use in detailed design. The available access roads and surrounding site conditions are included in the tender information and were also available for inspection during the mandatory site visit. Tenderers should consider these conditions when preparing their proposals.Answer 2:WWTP-B must be designed according to the Employer’s Requirements and the wastewater, flow, and site details provided in the Tender Documents. These documents do not specify a guaranteed inlet oil concentration or oil-droplet-size distribution for the HFO wastewater from the pumping pits. Annex I lists the sources and estimated quantities of HFO wastewater but lacks specific inlet characteristics. The required outlet performance is an oil content of 15 mg/l or less, as outlined in the Employer’s Requirements. Therefore, the Contractor must select and design the treatment process, including any necessary pre-treatment or additional treatment stages, to meet the required outlet quality based on the actual wastewater conditions confirmed during detailed design.Answer 3 : Drawing V5.3.8 – Arrangement plan of chemicals storage building is included in Volume 5 as published on UNGM. The note "(all 19 drawings MISSING — not in project files)" in the ToR is an internal drafting note and does not apply, pleae disregard it. 

New clarification added: Question : In section 5-1 drawings covering the existing wastewater networks are presented. As these are connection points for the plants of this project it is required to have knowledge about the existing installations heights in the vicinity of the proposed plants. Thus, the following details require information to ensure that all bidding parties will offer comparable solutions:a.           The shape, location and level of the channel that is used for discharge of wastewater containing the bottom-ash water directed to WWTP-A is required.b.           Related to WWTP-B, it is indicated that wastewater from the HFO pit pumps is directed towards the treatment station. It is expected that the pumps within the existing HFO pit have sufficient pumping characteristics to facilitate delivery of the wastewater towards the general area of the treatment plant at an elevation 10m above ground level. Please clarify if this is not applicable and present the respective characteristics of the pumps. The existing oily wastewater collection system which shall be treated within WWTP-B is expected to be integrated into the intake solution for WWTP-B. Please provide information on the location as well as depth and dimension of the existing system which shall be connected to.c.           For the existing rainwater system from which WWTP-C shall be fed no information is available on the characteristics of the existing networks. To ensure energy efficient treatment schemes which required minimal maintenance are utilized for treatment of the respective wastewater it is required to present characteristics of the existing networks in the vicinity of the proposed stations’ location.d.           The water from the existing WTP on the site shall be the inlet of WWTP-D besides a spare connector reserved for water from the future flue gas desulphurization. From the technical specification it is recommended to utilize manholes 11 or 12 from figure 2-6 of the technical specification. Please provide information of the depth of these existing manholes as well as depths of the existing pipes connecting these manholes. Further, please include the dimensions of the existing pipes in the premise of these manholes.Answer : Please refer to the following documents for the information currently available at Tender stage: Employer’s Requirements Volume 5.1 – Existing Drawings, Volume 3 – Technical Specification, Annex I – TPP Kosovo B Wastewater Background Information, and Annex IV – Existing Underground Utility Networks.a. WWTP-AAnnex I indicates that the bottom-ash wastewater is collected in an underground concrete channel running along the northern side of the plant and flows to the existing Bottom Ash Sedimentation Basin. Surveyed levels and detailed dimensions of the relevant channel sections are not available at Tender stage and shall be verified during detailed design.b. WWTP-BThe Tender Documents do not confirm whether the existing HFO pit pumps can deliver wastewater to an elevation of 10 m above ground level, nor do they provide guaranteed pump duty or head characteristics. Annex I states that the existing HFO wastewater is currently pumped to the rainwater collection network.The final connection point, including its location, depth, dimensions and hydraulic conditions, shall be verified during detailed design.c. WWTP-CAnnex I confirms that the coal-yard area is not currently served by an appropriate dedicated wastewater collection network, with runoff draining toward the lower parts of the site.The final collection and connection arrangement for WWTP-C shall therefore be developed during detailed design based on verified site levels, drainage conditions and hydraulic requirements.d. WWTP-DThe Technical Specification identifies Manholes 11 and 12 as potential connection points. However, surveyed depths, invert levels and dimensions of the associated pipelines are not provided at Tender stage. These details shall be verified before the final connection arrangement is developed.As required by Annex IV, the Contractor shall verify the relevant network levels, dimensions, gradients, materials, condition and connectivity before relying on the existing infrastructure in the final design. The ongoing geodetic/topographical survey will provide additional site information for detailed design. The final connection points and hydraulic interfaces shall be confirmed by the Contractor using the survey information, CCTV inspection and other necessary site investigations.Question : Please provide information on the exact location of the existing inlet pipe network towards upstream of the existing sewage treatment plant which WWTP-E will replace. Important information in this case is the depth and dimension of the existing pipes from which the treatment plant is fed. Regarding the downstream limit of supply during this contract please provide information on the existing channel downstream of the existing plant. This includes information about the location as well as dimension and depth of the existing channel.Answer : Refer to V5.1.4 – Layout Sewage Network, V5.3.7 – Arrangement Plan of WWTP-E, and Annex I, Figures 16 and 17 for the current information available at the Tender stage. The existing sewage network extends approximately 1,307 meters and directs sanitary wastewater towards the northeast side of the plant, where it discharges through an open channel. The Tender Documents do not confirm inlet pipe depths, dimensions, invert levels, or detailed levels and dimensions of the downstream channel. Therefore, the Contractor must verify these details during the detailed design stage using available survey data, CCTV inspections, and other necessary site investigations before finalizing the WWTP-E connections and downstream discharge arrangement. Additionally, refer to Annex IV, which requires verification of the existing network's location, levels, dimensions, gradients, materials, and connectivity before incorporating them into the final design.

New clarification added: Question :In the scope of treatment of general sewage at WWTP-E the dewatering of sludge generated in this process in part of the process. Please confirm that usual dewatering results which can be expected from biological sludge in wastewater treatment plants (dependent on the process between 20-25 %DS) are sufficient for treatment.Answer  : The proposed range of 20–25% dry solids (DS) does not meet the Employer’s Requirements. Volume 3 – Technical Specification, Section 4.2.5, page 42, specifies a minimum solids content of 50% for the dewatered sludge cake from WWTP-E, equivalent to a maximum moisture content of 50%. This requirement is also included in the performance guarantees under Section 9.7.7, page 73.Accordingly, bidders shall provide a sludge treatment solution that meets this requirement.Question :In the scope of WWTP-A it is foreseen that treated water is reused for production of ash-slurry. From the information available it is not clear where the point of delivery of treated water is in terms of location as well as elevation. Further it is not described at what level of pressure the water must be returned to at the point of interface. To ensure equal conditions for all bidders, please provide the required information about the location of transfer, including height, as well as the required pressure at that location.Answer  : As noted, the Tender Documents do not specify a fixed treated-water return point, elevation or required pressure for connection to the ash-slurry system.The Contractor shall therefore determine the final interface point and hydraulic requirements during the detailed design phase, based on verification of the existing ash-slurry system and coordination with UNOPS/KEK. Any existing pipeline proposed for retention or reuse shall be verified for its actual alignment, condition and hydraulic capacity before being incorporated into the final design. Please refer to V5.2/1– PFD WWTP-A Bottom Ash Removal and V5.3.2 – Arrangement Plan of WWTP-A for the information currently available at Tender stage.Question :Within the treatment scheme of plant WWTP-A it is presented that the sludge generated in this plant shall be delivered by belt-conveyor to the final discharge point. Yet, it is not presented where this discharge point is. Please describe what the envisaged approach to the removal of this sludge shall be (discharge to containers, discharge into trucks, discharge via container belt towards storage site, …). This will ensure that all bidding parties present comparable offers.Answer  : As noted, the Tender Documents do not specify a fixed treated-water return point, elevation or required pressure for connection to the ash-slurry system.The Contractor shall therefore determine the final interface point and hydraulic requirements during the detailed design phase, based on verification of the existing ash-slurry system and coordination with UNOPS/KEK.Any existing pipeline proposed for retention or reuse shall be verified for its actual alignment, condition and hydraulic capacity before being incorporated into the final design.Please refer to V5.2/1– PFD WWTP-A Bottom Ash Removal and V5.3.2 – Arrangement Plan of WWTP-A for the information currently available at Tender stageQuestion :Within appendix 3-5 table 3 the required effluent characteristics for WWTP-E are presented. Please confirm our understanding that the effluent requirements imposed on WWTP-E do not cover Nitrogen and Phosphorous concentrations. Further, please confirm that regarding TSS the upper limit of 60 mg/l is applied as the plant falls within the smallest category of plants.Answer  : Please refer to Volume 3 – Technical Specification and Appendix 3-2 – National Kosovar Wastewater Requirements, including Administrative Instruction No. 02/2022.For TSS, the applicable limit depends on the population-equivalent category. For wastewater treatment plants in the 2,000–10,000 p.e. category, the applicable TSS limit is 60 mg/l, while 35 mg/l applies to plants above 10,000 p.e. The Total Nitrogen and Total Phosphorus limits specified in the Tender Documents apply to discharges to sensitive areas for the population-equivalent categories stated therein, starting from 10,000 p.e.  Accordingly, the applicable WWTP-E effluent requirements shall be those corresponding to its applicable population-equivalent category and the statutory discharge/permit requirements. 

New clarification added: Question 1 :Question: In “SECTION IV - Schedule 2.1.A & B & C - Price Schedule Form”, page 5, Section 1.1 INSURANCE REQUIREMENTS, items 1.1.1 Construction all risk insurance, 1.1.2 Public liability insurance and 1.1.3 Workers’ compensation insurance state “Validity Period: one (2) Year”. The same wording appears in the Excel version on worksheet “2.1B-1Preliminaries & General A”, cells A19, A20 and A21.As the duration expressed in words differs from the numerical value, please confirm the correct required duration of each insurance policy, including the commencement and expiry of cover. Please also clarify the required coverage during design, construction, commissioning, joint operation and the twelve-month Defects Notification Period (DNP), taking account of the indicative project duration in ToR Section 4.1, and align the Price Schedule and Schedule 12 – Schedule of Insurance Requirements accordingly.Answer 1 :  The wording "one (2) Year" has been corrected by Amendment and now reads: "From the Commencement Date until issue of the Taking-Over Certificate (CAR) and in line with local legislation. Policies may be issued annually but shall be renewed without interruption.Cover therefore shall run  continuously from the Commencement Date through design, construction, testing and commissioning, and the 3-month joint operation, until the Taking-Over Certificate is issued for the whole of the Works (take-over follows the joint operation period, ToR Section 4.1). Offerors shall price premiums for this full period. 

New clarification added: Question: 1. Insurance Requirements / Schedule 12The insurance requirements are currently spread across Sub-Clause 18, Schedule 12, Form 2.9 and Item 1.1 of the Price Schedule. Schedule 12 is not completed, while Item 1.1 already defines certain required insurance types, insured amounts / limits and validity periods.Please consolidate and align the contractual insurance requirements in Schedule 12 and confirm, for each required policy:the required type of insurance;the insured amount / limit of liability;the applicable deductible;the required insurer rating; andthe required period of validity.In particular, please clarify and adjust the wording “Validity Period: one (2) Year” and confirm the actual required insurance period for the relevant project risks, including construction, testing/commissioning, Taking Over and, where applicable, the Defects Notification Period.Please also clarify the insurance evidence required at Proposal stage and confirm whether the Bidder may submit evidence of its existing general/corporate insurance policy during the bidding stage, with the required project-specific policies to be arranged and evidenced upon Contract award / prior to commencement of the respective insured activities.Answer 1 : An updated version of Section III – Conditions of Contract, with Schedule 12 (Schedule of Insurance Requirements) completed, will be issued to all Offerors. The update will consolidate the insurance requirements already set out in the solicitation documents, in particular Item 1.1 [Insurance Requirements] of the Price Schedule as clarified in previous  Clarification No. It will not introduce any new or additional requirements.1. Type of insurance and limits of liability: The required insurances are Construction All Risk insurance (Item 1.1.1), Third Party Liability insurance (Item 1.1.2) and Workers' Compensation insurance (Item 1.1.3), with the limits of liability stated in Item 1.1 of the Price Schedule. These limits are minimum requirements.2. Deductibles: No deductible is prescribed. Any deductible shall be borne by the Contractor.3. Insurer rating: Insurances shall be placed with insurers of good repute with a financial rating of not lower than Standard & Poor's BBB, Moody's Baa or A.M. Best BBB+, in accordance with Sub-Clause 18.1(b) of the General Conditions of Contract.4. Period of validity: The period of validity was clarified in previous Clarifications, which corrected the reference to "one (2) Year" in Item 1.1 of the Price Schedule. Construction All Risk insurance shall be valid from the Commencement Date until issue of the Taking Over Certificate. Third Party Liability and Workers' Compensation insurance shall be valid until expiry of the Defects Notification Period, in compliance with the mandatory requirements of local legislation. Policies may be issued annually but shall be renewed without interruption.5. Evidence at Proposal stage:  The wording "one (2) Year" has been corrected by Amendment and now reads: "From the Commencement Date until issue of the Taking-Over Certificate (CAR) and in line with local legislation. Policies may be issued annually but shall be renewed without interruption."Question 2. Taxes, Customs Duties and Import ChargesIt is understood from the tender information / pre-bid clarification that the Contract Price shall be net of direct taxes and VAT and that UNOPS is tax exempt in Kosovo.However, the Conditions of Contract generally provide that the Contractor shall bear applicable taxes, duties, fees and charges unless otherwise stated in the Contract.Please clarify whether the UNOPS tax-exempt status also covers customs duties, import taxes, levies and other charges applicable to imported Plant, equipment and materials required for the Works.Please also confirm the applicable exemption procedure, including any certificates, customs documentation or Employer/UNOPS support to be provided for import clearance and application of the exemption.Answer 2 : Yes. Under Article II, Section 7 of the Convention on the Privileges and Immunities of the United Nations, UNOPS, as a subsidiary organ of the UN, is exempt from direct taxes and from customs restrictions, duties and charges of a similar nature on articles imported for its official use (Section I – Instructions to Offerors, Article 19). Accordingly, Proposals shall be submitted net of all direct taxes, including customs duties, and indirect taxes such as VAT (Particulars – Duties and taxes).Question 3. Form 0.8 – Proposal Guarantee / WitnessPlease clarify what is meant by the “Witness” field at the end of Form 0.8 – Form for Proposal Guarantee and confirm who is required to complete and sign this field.Answer 3 :  The "Witness" field is completed by a person who is present when the Offeror's authorised representative signs Form 0.8. The witness confirms the signature by entering their name (in block letters), occupation and address, and signing. The witness may be any adult other than the signatory, for example an employee of the Offeror. No notarisation is required.

New clarification added: Question 5 : . Performance Security / Form 3.0At Proposal stage, the Bidder is required to submit a written commitment to provide the Performance Security in accordance with the prescribed form. Therefore, Form 3.0 – Performance Security Form should be fully clarified and aligned before such commitment is given.The clarification dated 03.09.2026 confirms that the Performance Bank Guarantee shall be 5% of the Contract Price, shall remain valid for the entire Contract Period and until expiry of the Defects Notification Period, and shall not be reduced following Taking Over.However, Form 3.0 still refers to a Guaranteed Sum of up to 10%, allows a reduction following Taking Over, links expiry to the Final Completion Certificate / final determination of a dispute, and leaves the currency of the Guarantee to be inserted.Furthermore, the Contract refers to submission of the Performance Security within 14 days after the Date of Contract, while the Tender Particulars refer to 10 calendar days from Contract issuance.Please therefore clarify and align Form 3.0 and all related Contract provisions and confirm the final:amount of the Performance Security;validity period and exact expiry event;whether any reduction is permitted following Taking Over;currency of the Guarantee; andapplicable deadline for submission of the Performance Security.Answer 5 : Amount: The Performance Security shall be 5% of the Contract Price, as confirmed in the clarification dated 03.09.2026.Validity period and expiry event: The Performance Security shall remain valid for the entire Contract period and until the expiry of the Defects Notification Period, as defined in Section 9.9 of the Employer's Requirements.Reduction after Taking Over: No reduction is permitted. The Performance Security shall remain at 5% of the Contract Price until its expiry.Currency: EURO Deadline for submission: Within fourteen (14) days after the Date of the Contract, in accordance with Sub-Clause 4.2(a) of the General Conditions of Contract.Form 3.0 [Performance Security Form]  and Schedule 1 (Schedule of Details) of the updated Section III – Conditions of Contract will amended  and be aligned with the above.Question 6 :. Schedule of Payments / Contractual Payment Terms / Payment TimelineCertain payment terms are described in Annex A – Terms of References (ToR), while the Instrument of Agreement does not expressly list the ToR among the documents forming part of the Contract. In addition, the contractual Schedule of Payments / Schedule 7 is not completed.For pricing, cash-flow assessment and contractual certainty, please incorporate the complete payment mechanism into the Contract documents and define the contractual Schedule of Payments, including:the individual payment milestones / instalments;the percentage or amount of the Contract Price payable against each milestone;the conditions and documentation required for certification and payment;the treatment of Plant and Materials manufactured, shipped, delivered to Site or otherwise procured for incorporation into the Works prior to physical incorporation into the Permanent Works, including the applicable provisions under Sub-Clauses 14.4 and 14.5; andthe complete payment timeline from submission of a compliant Statement / invoice through certification until receipt of payment.As Sub-Clause 14.4 provides that Sub-Clause 14.5 may not apply where instalment amounts are defined in the Schedule of Payments, please explicitly confirm whether Sub-Clause 14.5 will remain applicable and whether payment for eligible Plant and Materials prior to their physical incorporation into the Works will be allowed.Annex A further states that payment should be received within 30 days from receipt of an agreed and verified invoice. Please confirm how this period interacts with the contractual certification period and whether the Contractor is entitled to interest, financing charges or other compensation in case of delayed certification or late payment by the Employer.Answer 6 : The payment mechanism is set out in Annex A – Terms of Reference (ToR), Sections 4.6 and 5.6, and will be incorporated into Schedule 7 (Schedule of Payments) of the updated Section III – Conditions of Contract.Currency: The Contract Price and all payments shall be in Euro (EUR), in accordance with the Price Schedule form provided by the bidder.Milestones: Payment is made against the Project Milestones in ToR Section 4.6:Deliverable 1: Design Works.Deliverable 2: Milestone 2.1 Construction Works Mobilisation, and Milestones 2.2–2.7 Construction and Commissioning of WWTP-A to WWTP-E and the Chemical Store.Deliverable 3: Milestones 3.1–3.6 Training and Joint Operation.Amount per milestone: Instalments are based on the Offeror's priced Price Schedule and work programme, as stated in item 2.0 of the Preamble to the Price Schedule. No advance payment applies.Retention: 5% is withheld from each milestone payment. 50% is released on issue of the Taking Over Certificate for the whole of the Works, and the remaining 50% at the end of the Defects Notification Period (ToR Section 5.6; Sub-Clause 14.9).Conditions for payment: Payment requires a Statement with supporting documents under Sub-Clause 14.3 and satisfactory completion of the milestone as certified by UNOPS. No amount is certified or paid until the Performance Security has been received and approved (Sub-Clause 14.6(a)).Timeline: Employer's Representative issues the Interim Payment Certificate within 28 days of receiving a compliant Statement (Sub-Clause 14.6(a)). UNOPS pays within 30 days after the Interim Payment Certificate is issued (Sub-Clause 14.7(a)), which is the 30-day period referred to in ToR Section 5.6. Interest / late payment: The Contract makes no provision for interest or financing charges on late payment.   

New clarification added: Question: 1. Mandatory Staff / Supporting DocumentationRegarding the mandatory staff who will not be scored during the technical evaluation, please clarify whether such personnel are required to be included in the Proposal and, if so, which supporting documentation must be submitted for these positions at Proposal stage.Answer 1 : Mandatory staff positions that are not scored in the technical evaluation do not need to be named in the Proposal. However, the successful Offeror shall, prior to mobilisation, submit CVs for all personnel listed in the ToR demonstrating compliance with the minimum qualification and experience requirements stated therein, for UNOPS approval.Question 2. Schedule 1 – Schedule of Details / Key Commercial ParametersSchedule 1 [Schedule of Details] remains incomplete for several material commercial and contractual parameters that are required for pricing and risk assessment of the Proposal.Please complete and align Schedule 1 with the relevant Contract Sub-Clauses, including in particular:Time for Completion under Sub-Clause 8.2;Defects Notification Period under Sub-Clauses 1.1 and 11.1–11.3;Percentage and maximum amount of Retention under Sub-Clause 14.3; andCurrency/currencies of payment under Sub-Clause 14.15.The corresponding General Conditions refer these parameters back to Schedule 1 rather than defining the applicable values independently. Other material Schedule 1 parameters relating to Delay Damages, aggregate liability and dispute resolution are addressed separately below.Please clarify the applicable values and ensure that Schedule 1 is duly completed prior to the deadline for submission of Offers.Answer 2 : Answers to the submitted questions can be found in the attachments to this solicitation—specifically Annex A: Terms of Reference (ToR), the Employer's Requirements, and the Price Schedule. Offerors must base their pricing and risk assessments on these documents.An updated version of "SECTION III - CONDITIONS OF CONTRACT.pdf" (including the listed annexes) will be attached to the tender documents. However, please note that this update will not introduce any new or differing information beyond what is already provided in the aforementioned documents.Question 3 : 3. Delay Damages / Performance Damages / Aggregate LiabilitySub-Clause 8.7 provides that the applicable Delay Damages rate and the aggregate maximum amount of Delay Damages are to be stated in Schedule 1 – Schedule of Details, while Sub-Clause 17.6 provides that the aggregate limit of the Contractor’s liability is also to be stated in Schedule 1. These values are currently not completed.In addition, the Employer’s Requirements provide separate performance damage penalties in case of failure to achieve the guaranteed performance criteria, while Sub-Clause 17.6 expressly provides that Delay Damages under Sub-Clause 8.7 and damages under Sub-Clause 9.4 are outside the general aggregate liability limitation.Please therefore define and align the relevant entries in Schedule 1 and clarify:the applicable Delay Damages rate and aggregate cap;the Contract (General conditions) defines the meaning of the Sections ("Section" means a part of the Works (if any) specified in the Contract as a Section as identified in the Schedule of Sections or which the Employer's Representative nominates as a Section under Sub-Clause 1.15 [Sections]. Please specify the applicable Sections in the relevant Schedules (1 and 4) and please specify whether and how Delay damages apply to each individual Section, including the applicable amount/rate, aggregate cap and the relevant completion date triggering such Delay damages;the applicable aggregate liability cap under Sub-Clause 17.6;whether performance damage penalties are cumulative with Delay Damages;the applicable overall cap for performance damages; andthe maximum overall Contractor exposure where Delay Damages and performance damages apply in addition to liabilities subject to the general aggregate liability cap.Answer 3 : Answers to the submitted questions can be found in the attachments to this solicitation—specifically Annex A: Terms of Reference (ToR), the Employer's Requirements, and the Price Schedule. Offerors must base their pricing and risk assessments on these documents.An updated version of "SECTION III - CONDITIONS OF CONTRACT.pdf" (including the listed annexes) will be attached to the tender documents. However, please note that this update will not introduce any new or differing information beyond what is already provided in the aforementioned documents.Conserning Delay Damages, as stated in the Particulars (Liquidated damages / Delay damages), 0.1% of the original total Contract Price for each day of delay, up to a maximum of 10% of the original total Contract Price. Once the maximum is reached, UNOPS may terminate the Contract.Question: 4. Governing Law / Place of ArbitrationThe applicable governing law of the Contract is not clearly specified in the tender documentation, while the place of arbitration remains to be completed in the contractual schedules.Please confirm:the governing law applicable to the Contract; andthe place / seat of arbitration applicable under the dispute resolution provisions.Please ensure that these provisions are expressly incorporated and aligned in the final Contract documentation prior to submission of Offers.Answer 4 : Governing law: In accordance with Sub-Clause 20.3(f) of the General Conditions of Contract, the Contract is not governed by any national law. The decisions of the arbitral tribunal shall be based on general principles of international commercial law. Nothing in or relating to the Contract shall be deemed a waiver of the privileges and immunities of the United Nations, including UNOPS, which are expressly reserved under Clause 21 [Privileges and Immunities].Seat / place of arbitration: In accordance with Sub-Clause 20.3(f), there shall be no seat or place of arbitration. Disputes shall be finally resolved by arbitration under the UNCITRAL Arbitration Rules then in effect, and the language of the arbitration shall be English

New clarification added: Question 1:The two projects’ main agglomerations of units at the beginning of the existing waste water collection channels are indicated roughly on the available plans. To provide energy efficient solutions for treatment of waste waters, it is generally favorable to limit pumping of water to the absolute minimum. To ensure proper operation of the stations with minimal energy demand for pumping of water, it is important to have knowledge about the elevation of the existing discharge structures. This includes normal water levels after the discharge structures as well as currently used weir levels within the discharge structures. Further, in case of high-water situations it is unknown to the bidders if the current discharge stations are prone to being flooded. Thus, it is requested that information is presented outlining the experience of high-water situations and expected water levels in the discharge channels under these conditions.Answer 1 :  Please refer to the Employer’s Requirements, Volume 5.1 – Existing Drawings, together with Annex I – TPP Kosovo B Wastewater Background Information, Figures 9–11, for the available Tender-stage information on the existing discharge arrangements.please refere to : ER V5.1.1, V5.1.3, V5.1.4; Annex I, Figures 9–11The Tender Documents at this moment do not provide surveyed discharge elevations, weir levels, normal downstream water levels, or verified high-water/flood levels.A separate Employer contract is currently undertaking the geodetic/topographical survey and EIA. Upon completion, the available survey information will be provided to the awarded Contractor as baseline data.please refer to : Price Schedule 2.1B – General Items, Item 1.1The Contractor shall verify the relevant levels and hydraulic conditions during detailed design and incorporate them into the final hydraulic arrangement.Question 2 : In the scope of WWTP-C on the coal yard location it is proposed to deliver settled sediments directly back into the coal yard, namely towards the coal conveyor. Please indicate precisely the point of transfer which coal should be sent to. This shall include information about the existing structures used for transporting coal if existing structures shall be used for installation of piping or equipment for delivering coal. If no fixed point is projected to be used, please provide information on the available sections of the existing structures where the return of coal could be facilitated.Answer 2 : At the tender stage, a fixed transfer point for returning separated solids from the WWTP-C coal-yard unit to the coal handling system has not been established. The final transfer point and routing will be developed by the Contractor during the detailed design phase, taking into account actual site conditions and coordinating with UNOPS/KEK. Tenderers must include a complete and functional solids transfer system in their proposals. Existing coal-conveyor structures may be utilized for routing or supporting pipes and equipment only if their suitability and structural capacity have been verified and approved by KEK. If unsuitable, the Contractor must provide independent supports. Question 3  :WWTP-D is designed to treat the wastewater coming from the existing water treatment plant on site as well as the water expected in future from flue gas desulphurization (FGD). The dimensioning of this unit, especially the installations regarding generated sludge, are strongly dependent on the amount of solids expected in the incoming water from FGD. To ensure that all bidding parties face the same requirements please provide a concentration of solids within the water from FGD with which the design of the station shall be done. In this way it is ensured that all parties will provide comparable offers.Answer 3: As stated in Section 2.7 of the Technical Specification, the future FGD wastewater is expected to contain high concentrations of sulphates and heavy metals and will require chemical-physical treatment. The estimated FGD wastewater flow is 20 m³/h. For WWTP-D, which will treat the combined FGD and existing WTP wastewater streams, the total expected quantity is approximately 850 m³/day.  As the FGD plant has not yet been constructed, no further analytical data for this future stream are currently available. Bidders shall therefore base their design on the information provided in the Technical Specification and propose a sufficiently flexible and robust treatment processQuestion 4:For treatment of water from flue gas desulphurization (FGD) in WWTP-D the required dosing range of organo-sulfides as well as lime milk are not presented. We understand that final required dosing capacities depend strongly on the generated waste waters within FGD and are not known yet. Still, to ensure that all bidding parties present comparable offers we ask you to present the required dosing capacity ranges for these reagents.Answer 4 : The Tender Documents do not prescribe fixed dosing-capacity ranges for organo-sulphides or lime milk for the future FGD wastewater. As the FGD system is not yet operational, the wastewater characteristics required to establish final reagent consumption are not currently available. Bidders shall base their proposed WWTP-D treatment process on the  equirements and information provided in Volume 3 – Technical Specification and PFD V5.2/100VP1000030 – FGD Wastewater. The final chemical dosing requirements and operating ranges shall be established and substantiated by the Contractor during detailed design based on the confirmed FGD wastewater characteristics and the selected treatment process.please refer to to: Employer’s Requirements Volume 3- V5.2 – PFD FGD Wastewater. 

New clarification added: Question 3:Earthworks, Site Levels and Excavated Materials3.1. Final Site Levels and GradingPlease confirm the required final site levels and grading criteria for the individual WWTP areas and Chemical Storage Building, including the required interface levels with existing roads, surrounding ground, drainage systems and existing facilities. Where final levels are to be determined by the Contractor, please clarify the design criteria and Tender-stage assumptions to be adopted for assessment of cut, fill, imported material and disposal quantities.3.2. Disposal of Surplus Excavated and Unsuitable MaterialPlease identify the designated disposal locations for surplus excavated material and unsuitable soil arising from the Works, including the approximate haul distances and any applicable KEK or statutory requirements. Where disposal locations have not yet been designated, please clarify the common Tender-stage assumption to be adopted for pricing purposes.Question 4:Site Layout, Boundaries and Spatial Constraints4.1. Permissible Construction Areas and Site BoundariesPlease confirm the permissible construction area and site boundaries available for development of each WWTP, the Chemical Storage Building and the Coal Yard treatment facilities, and identify these boundaries on the relevant Tender drawings. Please also confirm whether the locations and footprints indicated in the Tender drawings are indicative only and whether the Contractor may optimise the final layout within the available areas, subject to the Employer's Requirements and applicable statutory requirements.4.2. Layout Restrictions and Proximity to Existing StructuresPlease confirm whether any project-specific restrictions apply to the positioning of the proposed facilities in relation to existing buildings, tanks, roads, pipelines, channels, electrical infrastructure and other facilities that are to remain in operation, including any minimum separation distances, safety clearances or required operational and maintenance corridors. Where such restrictions apply, please identify the applicable requirements and/or boundaries on the relevant Tender drawings.Answer : 3.1 Final Site Levels and GradingThe Tender drawings indicate the intended facility locations, but the Contractor shall establish the final site grading and finished levels through its detailed design, taking into account the completed topographical survey, existing tie-in elevations, drainage, hydraulic requirements, access, and applicable flood and groundwater conditions.The geodetic/topographical and geotechnical studies are already in progress under separate assignments and are expected to be available to the Contractor before commencement of the detailed design process.3.2 Disposal:Suitable excavated material may be reused on Site where appropriate and subject to approval.Surplus or unsuitable excavated material that cannot be reused shall be disposed of at a legally authorized landfill or disposal facility within a maximum distance of 10 km from the project site. Tenderers should include this allowance in their Tender price.The disposal location shall be selected by the Contractor and approved by the relevant authority, and all transportation and disposal activities shall comply with applicable statutory and KEK/site requirements.4.1 Permissible Construction Areas and Site BoundariesThe arrangement drawings provide indicative locations for the WWTPs, Chemical Storage Facility, and Coal Yard treatment facilities. These proposed areas are based on technical assessments conducted by EU-engaged experts, including the 2016 feasibility study and the updated 2021 assessment, which identified these sites as suitable for the facilities.As this is a Design & Build Contract, the Contractor has the flexibility to optimize the final layout within the designated project areas, provided it complies with the Employer’s Requirements, statutory obligations, existing site conditions, and receives approval during the design process. Any plans extending beyond the specified project areas or impacting existing KEK infrastructure or operations must be coordinated and approved.4.2 Layout Restrictions and Proximity to Existing StructuresThe Contractor is responsible for developing the final layout, considering existing buildings, roads, tanks, pipelines, channels, electrical infrastructure, and other operational facilities. This must ensure necessary access, safety clearances, and fulfillment of operation and maintenance requirements.If specific separation distances or clearances are not detailed in the Tender Documents, the Contractor must determine them during the detailed design phase, adhering to applicable standards, statutory requirements, and KEK operational guidelines.

New clarification added: Question1:Existing Underground Utilities and Services1.1. Existing Underground Utilities – Tender InformationPlease provide information and/or as-built records identifying existing underground utilities and services within and adjacent to the proposed WWTP-A, WWTP-B, WWTP-C, WWTP-D, WWTP-E, Chemical Storage Building and Coal Yard work areas, including electrical, control and communication cables, pipelines, drainage systems, channels, ducts and other buried services, together with their available alignments, levels/depths, dimensions and operational status.1.2. Diversion, Relocation and Protection of Existing UtilitiesPlease provide information on identified existing underground or above-ground utilities currently known to require diversion, relocation, temporary support or permanent protection as a consequence of the proposed WWTPs, pipeline routes and associated civil works.1.3. Pipeline and Utility Crossings of Existing InfrastructurePlease provide information about known locations where the proposed wastewater, treated-water, sludge, drainage and utility pipelines are expected to cross existing roads, operational pipelines, underground channels, cable routes or other TPP infrastructure and clarify any specific KEK requirements applicable to such crossings, including sleeves, protection structures, trenchless installation, temporary traffic arrangements and reinstatement.Question 2:Site Access, Construction Areas and Existing Roads2.1. Construction Site Access and Main EntrancePlease confirm the designated access route to the Site during construction, including whether the Contractor shall use the existing main entrance/security gate of TPP Kosovo B and the existing access road within the KEK premises. Please identify the designated construction access route on a drawing and confirm whether any new or temporary access road from the main entrance to the respective WWTP work areas is required within the Contractor's scope.2.2. Use of Existing Internal Roads During ConstructionPlease confirm whether the existing internal road network within TPP Kosovo B will be made available to the Contractor for transport of personnel, construction materials, equipment and heavy machinery to all WWTP locations and the Chemical Storage Building throughout the relevant construction periods. Please also identify any access restrictions, load limitations, prohibited routes or areas where temporary construction roads will be required.2.3. Permanent Access Roads and Reinstatement of Existing Roads. The Price Schedule includes "External Works (access roads, landscaping, fences, etc.)", while Appendix 3-B specifies requirements for road construction and paving. Please clarify the extent of permanent road works to be included in the Contractor's scope and identify on the relevant drawings the roads and paved areas to be newly constructed. Please specifically confirm whether the Contractor is required to construct new asphalt/concrete access roads or upgrade/resurface existing internal roads within TPP Kosovo B, or whether the Contractor's obligation in respect of existing roads is limited to reinstatement of areas disturbed or damaged by execution of the Works.2.4. Construction Working Areas, Laydown and Temporary Facilities. Please identify the areas that will be made available to the Contractor for temporary site facilities, offices, workshops, fabrication areas, material storage, equipment laydown, parking and temporary stockpiling of excavated material. Please confirm whether such areas will be provided within the TPP Kosovo B premises and identify any restrictions applicable to their use.2.5. Construction Interfaces with Existing TPP Operations and Other ContractorsPlease identify the areas where the Contractor's civil works will interface with ongoing TPP operations or works being executed by other contractors and provide the applicable spatial, access and construction restrictions. Please clarify which areas will not be available for simultaneous construction and indicate the anticipated dates when the respective WWTP work areas will be made available to the Contractor.2.6. Temporary Utility Connections for Construction FacilitiesPlease confirm whether the Contractor will be permitted to connect the temporary site offices, workshops and other construction facilities to the existing TPP Kosovo B utility networks, including electricity, potable water, service/industrial water, sewerage and internet/telecommunication services. Where such connections are available, please identify the available connection points, capacities and applicable technical or operational restrictions,Answer : 1.1 Existing Underground UtilitiesThe existing network drawings and Annex IV provide the current information available to the Employer. These are indicative and should not be considered as complete or fully verified as-built records. The Contractor is responsible for verifying the location, depth, dimensions, and condition of affected underground services before finalizing the design and commencing construction. This verification should be conducted using utility scanning, CCTV, or other appropriate investigation methods as necessary.1.2 Diversion, Relocation, and ProtectionThe requirements specified in the Tender documents must be considered. Any additional diversion, relocation, or protection measures required by the Contractor’s final design must be developed and coordinated with KEK. Existing operational services should remain functional unless an approved shutdown or diversion is agreed upon.1.3 Pipeline and Utility CrossingsThe Tender information and Annex IV should be used to identify known interfaces and crossings. The Contractor must verify actual site conditions and develop any additional crossing, protection, and reinstatement measures required for the final design, in coordination with KEK. As stated in Annex IV, the actual network layout, connectivity, and condition are subject to on-site verification.2.1 Main access: Existing TPP access routes will be used subject to KEK security, traffic and operational controls. The Contractor shall provide any temporary internal access arrangements additionally required for execution of its Works.2.2 Existing roads: Use is subject to approved construction logistics, vehicle/axle suitability, KEK controls and the Contractor’s traffic-management arrangements. Unrestricted use should not be assumed.2.3 Permanent roads: New or modified roads required for operation/access to the respective WWTP facilities form part of the external works. General upgrading of unrelated TPP roads is not required; damage caused by the Contractor shall be reinstated.2.4 Laydown/site facilities: Dedicated laydown areas are constrained by other ongoing works. Final temporary-working and laydown areas will therefore be coordinated with UNOPS/KEK before mobilisation. The Contractor shall plan its logistics accordingly.2.5 Interfaces/access timing: The currently agreed planning strategy is phased implementation because of the overlapping ESP/NOx works. This should be treated as an interface/coordination requirement rather than an unconditional guarantee of unrestricted access on a specific day.2.6 Temporary utilities: Same response as Q7: Contractor responsibility; use of existing TPP services only subject to availability and prior written approval.

New clarification added: Question : Question 2:Geodetic and Topographical Survey Information2.1. Availability and Timing of Geodetic / Topographical Survey DataThe Price Schedule states that geodetic/topographical surveys are currently in progress under a separate Employer contract and will be provided as baseline data. Considering that this information is required for development of the Tenderer's technical solution, including site levels, earthworks, hydraulic profiles, pipeline routing and interfaces with existing infrastructure, please confirm when the survey results will be made available to the Tenderers and ensure that they are issued sufficiently in advance of the Tender submission deadline to allow adequate time for their review and incorporation into the technical proposal and Tender price.2.2. Scope and Format of Geodetic / Topographical Survey DataPlease confirm the scope and format of the geodetic/topographical survey data to be provided, including, as applicable, the DTM/DEM, topographical survey, survey control points and benchmarks, coordinate and elevation reference systems, existing ground levels, and surveyed locations, coordinates and levels/depths of relevant existing infrastructure, including pipelines, channels, sewers, manholes, electrical and communication cables, ducts and other buried services.2.3. Geographical Coverage of the Ongoing SurveyPlease confirm the geographical extent of the geodetic/topographical survey currently being undertaken under the separate Employer contract, including whether it covers all proposed WWTP-A, WWTP-B, WWTP-C, WWTP-D and WWTP-E locations, the Chemical Storage Building, Coal Yard, proposed pipeline routes, connection/interface points and discharge/outlet locations.Question 3:Existing Structures and Demolition Works3.1. Existing Structures, Foundations and Demolition ScopeAt the proposed locations of WWTP-A and WWTP-E, existing facilities are foreseen to be demolished prior to construction of the new WWTPs. Please provide as-built drawings and other relevant information defining the existing structures and demolition scope, including dimensions, levels, structural systems, underground structures, foundation types, dimensions and founding levels.3.2. Disposal of Demolition MaterialsPlease inform if any designated disposal locations are identified for demolition waste arising from WWTP-A and WWTP-E, including the approximate haul distances and any specific KEK requirements applicable to transportation and disposal. Please also confirm the designated location within TPP Kosovo B for metallic scrap and other recovered materials that are to remain the property of the Beneficiary.Answer : 2.1 Availability and TimingThe geodetic and topographical survey is being conducted under a separate contract and is expected to be completed by the end of October 2026. As outlined in the Price Schedule, the finalized survey will be provided to the selected Contractor for use in detailed design work. Tenderers should base their proposals on the current information in the RFP and account for necessary adjustments under the Design & Build scope.2.2 Scope and FormatThe survey comprises a high-precision digital geodetic and topographic assessment of the entire project site, including a 50-meter buffer zone, utilizing drone-based surveying methods alongside essential ground survey and control activities. It encompasses all proposed WWTP locations, the Chemical Storage Facility, discharge pipelines, access roads, and discharge points. Final deliverables will include certified drawings and digital files in formats required for governmental submissions, such as SHP, DWG, and PDF, along with relevant survey control and reference information.2.3 Geographical CoverageThe survey aims to cover the entire project area, including the five WWTP locations, Chemical Storage Facility, associated discharge pipelines, access roads, discharge points, and the 50-meter buffer zone. Even though the Employer provides the survey information, the Contractor is responsible for verifying this information and conducting any additional surveys, utility scans, or investigations necessary for the final design and construction.3.1 Existing Structures and Demolition WorksExisting facilities at WWTP-A and WWTP-E are to be demolished as part of the project. During the mandatory site visit, Tenderers had the chance to inspect both facilities and evaluate their condition, size, accessibility, and the scope of demolition work required. These site conditions should be considered when preparing the technical proposal and Tender price.3.2 Disposal of Demolition MaterialsDemolition waste must be disposed of at a legally authorized landfill or disposal facility within a 10 km radius of the project site. Tenderers should include this in their Tender price. Metallic scrap and other recoverable materials that remain the property of the Beneficiary must be delivered to a location designated by KEK within TPP Kosovo B.

New clarification added: Question : Geotechnical Information and Foundation Design1.1. Additional Geotechnical Study Under PreparationDuring the Pre-Bid Meeting, it was stated that additional geotechnical studies are currently being prepared by another consultant. Please confirm whether the results of these investigations will be made available to the Tenderers sufficiently in advance of the Tender submission deadline to allow adequate time for their review and incorporation into the technical proposal, preliminary foundation design and Tender price. If so, please indicate the expected date of issue and clarify how the new investigation results are to be considered in relation to the April 2021 Geotechnical Investigation Report included in Appendix 3-4, particularly where the findings differ. In case of conflicting results or recommendations, please confirm which information shall prevail for Tender purposes.1.2. Geotechnical Basis for Tender-Stage Foundation Design and PricingThe Technical Specification states that the April 2021 Geotechnical Investigation Report may be used for a first estimation of the ground conditions, while the Contractor is required to carry out supplementary geotechnical investigations during the design stage. Please confirm whether, for Tender-stage preliminary foundation design and pricing, Tenderers shall base their assumptions on the April 2021 Geotechnical Investigation Report and its recommendations until the results of any additional or supplementary investigations become available.1.3. Representativeness of BH-1 for WWTP-A, WWTP-D, WWTP-E and Chemical Storage BuildingThe April 2021 Geotechnical Investigation Report uses BH-1 as the basis for the preliminary foundation assessment of WWTP-A, WWTP-D, WWTP-E and the Chemical Storage Building, whereas BH-2 and BH-3 are used for WWTP-B, WWTP-C and WWTP-C Coal Yard. Considering the spatial separation between these structures, particularly WWTP-E relative to BH-1, please confirm whether BH-1 is considered representative of the ground conditions at all these locations for Tender-stage preliminary foundation design and pricing. If not, please clarify the geotechnical assumptions to be adopted by Tenderers until structure-specific investigation results become available.1.4. Minimum Scope of Supplementary Geotechnical InvestigationsAppendix 3-B requires the Contractor to carry out the required number of boreholes at each structure, with the number and depth to be specified by the geotechnical designer. For establishment of a common Tender basis, please confirm whether the Employer has any minimum requirements regarding the number and depth of boreholes, CPTs, SPTs, laboratory tests and other in-situ investigations for each WWTP structure, or whether the complete investigation programme shall be determined by the Contractor's geotechnical engineer.1.5. Access and Timing for Supplementary Geotechnical InvestigationsConsidering the requirement to perform structure-specific geotechnical investigations, please confirm when access will be made available for boreholes, CPTs and other investigation works at the individual WWTP locations, particularly in areas affected by existing facilities, ongoing operations or other contractors. Please also confirm whether the required geotechnical investigations must be completed prior to submission of the respective detailed designs for statutory approval.1.6. Final Foundation SystemThe April 2021 Geotechnical Investigation Report assesses different foundation solutions, including shallow/raft foundations with ground improvement and deep foundations. Please confirm that the foundation solutions assessed or recommended in Appendix 3-4 are not mandatory and that the Contractor may determine the final foundation system based on the supplementary geotechnical investigations, final structural loads and settlement analysis, subject to compliance with the Employer's Requirements and approval of the design.1.7. Design Groundwater LevelThe April 2021 Geotechnical Investigation Report provides groundwater levels measured during the investigation period. Please confirm the design groundwater level to be adopted for permanent works design, including foundation design and uplift/buoyancy verification of tanks and underground structures. If no prescribed design groundwater level is available, please confirm that the Contractor shall establish the applicable design groundwater level through the supplementary geotechnical/hydrogeological investigations.Asnswer : 1.1 Additional geotechnical investigation:Clarification: no separate Employer geotechnical investigation should be assumed for Tender purposes. The geotechnical and hydrogeological investigations required to substantiate the final design are included within the Contractor’s scope. The April 2021 Geotechnical Investigation Report remains available as Site Data/information. If any additional Employer geotechnical information becomes available, it will be formally communicated through the procurement process.1.2 Tender-stage basis:Tenderers may use the April 2021 Geotechnical Investigation Report as the available indicative basis for preliminary Tender-stage assessment. However, it is not a substitute for the supplementary, structure-specific investigations required from the Contractor after award.1.3 BH-1 representativeness:The Employer does not warrant that BH-1 is representative of all ground conditions at WWTP-A, WWTP-D, WWTP-E and the Chemical Storage Facility. The existing investigation shall be treated as indicative Site Data. Structure-specific conditions shall be verified by the Contractor through the supplementary investigations.1.4 Minimum investigation scope:No additional fixed minimum number of boreholes, CPTs, SPTs or laboratory tests is prescribed beyond the requirements of the Employer’s Requirements. The Contractor’s qualified geotechnical designer shall establish an investigation programme adequate for the final design, applicable standards, structural loads and site conditions.1.5 Timing/access:Supplementary investigations shall be undertaken following mobilisation and coordinated with UNOPS/KEK and other activities on the operational TPP site. The investigations relevant to a structure shall be completed sufficiently in advance of finalising and submitting the corresponding detailed foundation design for review/statutory approval.1.6 Foundation solution:Confirmed. Foundation solutions discussed in the April 2021 report are not to be interpreted as mandatory final solutions. The Contractor shall determine and substantiate the final foundation system on the basis of its supplementary investigations, final loads, settlement/bearing/uplift assessments and applicable design requirements, subject to review and approval.1.7 Groundwater:Groundwater levels in the existing report are indicative measurements from the investigation period. The Contractor shall establish the appropriate design groundwater conditions through its supplementary geotechnical/hydrogeological investigations and shall account for the applicable groundwater condition in foundation, basement, tank and uplift/buoyancy design.

New clarification added: Question : Design Schedule, Permitting and Statutory ApprovalsStatus of Construction Terms and Statutory ConsentsPlease confirm the current status of the Construction Terms and associated statutory consents for the Project.Please confirm whether the Construction Terms will be obtained by the Employer before the Commencement Date. If not, please list the consents that have been obtained and those expected to be obtained by the Commencement Date. If any consents or statutory procedures are expected to remain outstanding as of the Commencement Date, please identify them and provide the planned timeframe for obtaining/completing them. Answer : The Construction Terms and Construction Permit have not yet been obtained.Regulatory-permit support is currently ongoing. The Employer/Beneficiary has initiated the required preparatory activities, including the geodetic/topographical survey, preparation of the Water Conditions application and EIA/environmental documentation. KEK has also issued the necessary authorization for the regulatory process, and the Municipality of Obiliq issued its formal consent on 14 August 2026. Bidder should not assume that the Construction Terms will be available before the Contract Commencement Date. The permitting process will continue in coordination with KEK, UNOPS, the competent authorities and the Design & Build Contractor. The Contractor remains responsible for preparing the detailed design and other technical documentation required for the statutory submissions in accordance with the tender requirements.

New clarification added: Question : Could you please clarify whether the SCADA system of the new WWTP's needs to be integrated with the SCADA system of the existing plant? Are there any specific data that need to be exchanged between the two SCADA systems, either from the new plants to the existing SCADA system or vice versa?Answer : The Employer’s Requirements require the Contractor to provide the specialist SCADA system(s) for the new WWTPs and to develop the associated PLC, telemetry and SCADA control architecture as part of the Design & Build scope. The Tender Documents do not specify a mandatory integration of the new WWTP SCADA system with the existing TPP Kosovo B SCADA system, nor do they define a specific list of signals or data to be exchanged between the two systems. Accordingly, for tender purposes, the Contractor shall provide a complete SCADA system capable of monitoring, supervision and control of all new WWTPs in accordance with the Employer’s Requirements. The Contractor is responsible for developing the final SCADA architecture as part of the detailed design. This is consistent with the previous clarification that the Contractor shall propose the central SCADA/control arrangement for the WWTP system. Any interface with the existing TPP SCADA system, including the communication method, interface points and any required exchange of operational status, alarms, measurements or other signals, will be confirmed and coordinated with KEK during the detailed design, based on the existing TPP system and operational requirements.Question : Could you please clarify where the connection point between the telecommunication network of the new WWTP's and the network of the existing plant would be located? Does the new plant need to be connected to an external telecommunication network?Answer : The Tender Documents do not identify a fixed connection point between the telecommunication network of the new WWTPs and the existing TPP Kosovo B telecommunication network. The Contractor shall provide the internal communication/network infrastructure required for the proper operation of the WWTP control, instrumentation and SCADA systems. The Employer’s Requirements require the Contractor to provide the electrical and control systems, including the specialist SCADA system(s). A permanent connection to an external/public telecommunication network is not specifically required by the Tender Documents. Should an interface with the existing KEK/TPP network be required as part of the final operational arrangement, the connection point and technical interface shall be coordinated with KEK during the detailed design. For construction-stage facilities, the Price Schedule separately requires the Contractor to provide an internet connection on Site with a minimum bandwidth of 2 Mbps for UNOPS, the Contractor and Subcontractors.Question : The planned locations of the new WWTP's are with the existing road infrastructure. Could you please clarify the scope of supply for the external and road lighting? Where is the area limit for the external and road lighting installation?Answer : The Contractor shall provide the external lighting necessary for the safe and proper operation of the new WWTP facilities, Chemical Storage Facility and associated external works, including access and circulation areas forming part of the Contractor’s Works. The Price Schedule identifies external works, including access roads, landscaping and fencing, separately for the individual WWTP facilities and Chemical Storage Facility.  The Tender Documents do not identify a requirement to replace or upgrade the lighting of the entire existing TPP Kosovo B road network. Accordingly, the permanent lighting scope shall be limited to the new facilities and any new or modified access roads, walkways and external operational areas forming part of the Works.  The final lighting layout, extent and number/location of luminaires shall be developed by the Contractor during detailed design, taking into account the final site arrangement, safe access, operation and maintenance requirements and the applicable illumination and electrical standards.Question : Could you please clarify whether the temporary LV electricity supply for the construction works and temporary facilities of the contractor can be provided from the existing plant, or a temporary LV power supply need to be arranged from external (KEDS) electrical network?Answer : The source of temporary electricity for construction is not prescribed as either the existing TPP network or the external KEDS network. In accordance with the Price Schedule, the Contractor is responsible for arranging and paying for the temporary electricity supply required for the Works and its temporary facilities, including connection, distribution and internal arrangements, whether obtained from the mains or another suitable source. The Contractor is also responsible for ensuring a steady and uninterrupted supply. A temporary connection to the existing TPP Kosovo B LV network may therefore only be used if technically available and approved by KEK; such availability is not guaranteed as part of the Tender. If such a connection is not available or sufficient, the Contractor shall arrange an alternative source at its own cost. The Price Schedule also requires provision of a temporary 125 kVA / 100 kW diesel generator with automatic transfer switch, which shall be taken into account in the Contractor’s temporary power arrangements.Question : We have not identified any requirement in the tender documents for the supply, delivery and installation of a emergency diesel generator to provide emergency power for the new WWTP's in the event of failure of the main power supply. Could you please confirm that the supply, delivery and installation of a diesel generator set for emergency power is not included in the scope of this tender?Answer : Confirmed. A dedicated permanent emergency diesel generator for the completed WWTP facilities is not specified as a separate mandatory plant item in the issued tender documents.The diesel generator included under Price Schedule Item 1.3.8 is a temporary generator for construction/site requirements and shall not be interpreted as a permanent emergency generator for the completed WWTPs. The Contractor nevertheless remains responsible for complying with all power-supply reliability, standby, UPS, control and safety requirements otherwise stated in the Employer’s Requirements.Question : After demobilisation of the construction site, will the temporary diesel generator stated in bils of quantities, item 1.3.8., remain the property of the Employer or the Contractor?Answer : The diesel generator under Item 1.3.8 is temporary construction/site equipment. It shall remain the property of the Contractor and shall be removed following completion/demobilisation, together with the other temporary facilities, unless otherwise instructed by the Employer in writing.

New clarification added: Question : Please confirm whether the information that the parking area has a total surface area of 30,000 m², and that the area of 30,000 m² is to be used as an input parameter for calculating the required equipment, is correct.Answer: Please refer to Annex 1 and Volume 3 Technical Specification page 24, point 2.4.4.3 Run off – storm waterQuestion: What is the capacity of the sand filter(s) at WTP? Are the sand filters of the open type or pressure type? Is on location WTP existing  tank or basin for collecting the water generated during the backwashing process of the sand filters?Answer : The Tender Documents do not state the rated capacity or number of the individual existing sand filters. Annex I indicates that approximately 1,000–1,200 m³/h of raw water enters the WTP and, following clarification, is conveyed to the sand-filtration stage. This figure relates to the overall WTP flow and should not be interpreted as the confirmed capacity of the individual sand filters. Based on Figure 5 of Annex I, the existing sand filters are open/gravity-type filters constructed as open basins. Regarding backwash water, the Tender Documents do not identify a dedicated existing tank or basin specifically for collection of sand-filter backwash water. Annex I indicates that wastewater generated from sand-filter backwashing is conveyed to the existing Rainwater and Chemically Neutral Wastewater Network. The available background information estimates the sand-filter flushing wastewater at approximately 70 m³/day.Question : For administrative purposes for JV establishment, we currently need the confirmation of the attenance of the site visit at the facility of KEK Kosova B held on 31.08.2026.Answer:  UNOPS does not confirm the attendance of individual companies in the published clarifications. The requested confirmation has been sent to the requesting party directly by email.Question: In Appendix 3-C Electrical requirements, 8.2 Lighting fixtures and lamps The Employer's specification refers to fluorescent luminaires, discharge lamps and LP sodium vapour lamps. Is the use of modern, more energy-efficient LED luminaires permitted as an alternative, provided that they meet or exceed the specified requirements for illumination, protection rating, environmental conditions and other applicable technical requirements?Answer: The use of modern LED luminaires is permitted as an alternative to the fluorescent, discharge and LP sodium vapour lamps referred to in Appendix 3-C. The proposed LED luminaires shall meet or exceed the applicable requirements of Appendix 3-C and the Contract, including the specified illumination levels, protection ratings, environmental/service conditions, electrical and safety requirements, and other relevant performance criteria. The Contractor shall demonstrate compliance of the proposed LED luminaires through the design calculations, technical data and relevant product/material submissions. The use of LED technology shall not result in any reduction of the performance or functional requirements specified in the Employer’s Requirements. Question :In Appendix 3-C Electrical requirements, the specification refers to IEC and VDE standards for the design, equipment and installation requirements. Since the project is located in the Republic of Kosovo, In case of discrepancies or conflicts between the applicable Kosovo legislation/regulations and the IEC/VDE requirements specified in the Employer's documents, please clarify which requirements shall take priority?Answer: The Contractor shall comply with all applicable laws and regulatory requirements of the Republic of Kosovo. The Conditions of Contract require the Contractor’s design, documents and completed Works to comply with applicable Laws and the requirements of the relevant Authorities. Accordingly, where a genuine conflict exists between a mandatory requirement of applicable Kosovo legislation/regulations and an IEC/VDE requirement referenced in Appendix 3-C, the mandatory Kosovo legal/regulatory requirement shall prevail. EC and VDE standards shall otherwise remain applicable as specified in the Employer’s Requirements. Where the requirements can be complied with simultaneously, the Contractor shall comply with both. In case of any ambiguity or discrepancy within the Contract documents, the Contractor shall notify the Employer’s Representative for clarification; for requirements relating to standard or quality of work, the higher or more onerous contractual requirement applies unless otherwise instructed in writing.Question : In technical specification is stated that power supply of the WWTP’s will be from one transformer, which is supplied from existing 6 kV switchgear of the TPP. Could you please provide more information about the existing 6 kV switchgear to which the connection will be made? Please clarify whose responsibility it is to equip the bay with new equipment if the existing switchgear is found to be inadequate for the requirements of the new WWTP's?Answer : As previously clarified, spare 6.3 kV electrical cubicle(s) are available within the Kosovo B facility (as showed and explained during site visit) for connection of the new transformer serving the WWTPs. A specific feeder/cubicle is not designated at tender stage. The final connection point will be confirmed during the detailed design and coordinated with UNOPS/KEK based on the available cubicle and the existing electrical system configuration. The Contractor shall include all necessary 6.3 kV cabling, cable routes, terminations and associated connection works from the designated cubicle to the new transformer. Detailed information on the final selected cubicle, including the condition and suitability of the existing equipment, will therefore be verified during the detailed design and coordination with KEK.

New clarification added: Question:Please clarify how the Employer will address a situation where the actual wastewater characteristics and/or measurements established during construction or performance guarantee testing differ from the data provided in the Tender Documents, and such differences affect the wastewater treatment concept on which the Contractor’s Tender is based or require modifications, additional works and additional costs.Please confirm that any such modifications or additional works will be treated as a Variation and that the Contractor will be entitled to an appropriate adjustment of the Contract Price and, where applicable, an extension of the Time for Completion.Answer : As previously clarified under Price Schedule 2.1B – General Items, Item 1.1, the Contractor shall allow for the necessary investigations and design verification, including wastewater sampling, treatability testing, laboratory testing, site inspections and baseline data verification. The final design basis shall therefore be established and verified by the Contractor during the design stage, and the performance requirements shall be demonstrated through the applicable testing and commissioning procedures under the Contract.Question : Please provide a detailed water balance for the key processes at the Kosovo B Thermal Power Plant, including data on raw water supply, water consumption and use within each key process, and the resulting wastewater flows. The data should include average, minimum and peak flow rates, as well as any relevant seasonal and operational variations.Answer : Please refer to Annex I – TPP Kosovo B Wastewater Background Information, particularly Sections 2.1 Raw Water Supply, 2.2 Overall Water Balance, 2.3 Raw Water Treatment Plant, and Sections 3.1–3.5 on wastewater streams. Annex I contains the available preliminary water balance, process water consumption information and estimated wastewater flows for the main wastewater streams. The document specifically includes a water consumption balance and a summary of the existing wastewater streams.Question : The Tender Documents require the construction of a treatment plant for wastewater generated by the flue-gas desulphurisation (FGD) process. Please provide the influent design basis to be used for the design and sizing of WWTP D, including the expected wastewater flow rates, composition, pollutant loads and relevant variability.Please also confirm the binding input data that shall form the basis for the design and construction of WWTP D and for the verification of the guaranteed performance parameters, as the Tender Documents do not appear to contain analytical data for the wastewater generated by the FGD plantAnswer: According to Section 2.7 of the Technical Specification, future FGD wastewater is anticipated to contain high concentrations of sulphates and heavy metals and will require chemical-physical treatment. The projected FGD wastewater flow rate is 20 m³/h. For WWTP-D, which will treat both the FGD and existing WTP wastewater streams, the total expected volume is approximately 850 m³/day.As the FGD plant has not yet been constructed, no additional analytical data for this future wastewater stream are currently available. Bidders shall therefore base their design on the information and requirements provided in the Tender Documents, including the Technical Specification, and shall propose a sufficiently flexible and robust treatment process capable of accommodating the expected characteristics and variability of the FGD and WTP wastewater streams.The final process design, including the hydraulic and pollutant loading assumptions, shall be developed and substantiated by the Contractor during the detailed design stage in accordance with the Employer’s Requirements.Question: Please provide the representative analysis and specification of the coal used at the Kosovo B Thermal Power Plant, including, as a minimum, its ash content, calorific value, moisture content and any other parameters relevant to the design and operation of the proposed wastewater treatment plants. Please also indicate the expected ranges and variability of these parameters.Answer: The Tender Documents do not provide a separate representative coal specification or validated range for the lignite used at TPP Kosovo B covering ash content, calorific value, moisture content and related coal-quality parameters. For Tender purposes, the design of the WWTPs shall be based on the Employer’s Requirements and the wastewater, flow and site information provided in the Tender Documents, rather than on an assumed fixed coal specification. Where coal, ash or combustion-product characteristics are relevant to the Contractor’s final process design, the Contractor shall verify the necessary parameters during the design stage as part of its data verification, sampling and testing activities. The ToR expressly includes additional data verification, sampling and testing within the Contractor’s design responsibilities. Accordingly, no additional coal-quality range is established by this clarification. Question:We kindly ask you to  provide us information on the quantities of water required for the operation of the hydraulic system for the transport of combustion by-products (ash and slag) at Kosovo B TPP. We noted in the tender documentation that the water-to-combustion-by-products mixing ratio is stated as 1:1. Please confirm whether the 1:1 mixing ratio applies to the operation of the hydraulic ash and slag transport system. If not, please specify the applicable mixing ratio.Answer: Annex I provides preliminary/historical information regarding water consumption associated with ash and slag handling. The preliminary water balance indicates approximately:150 m³/h of raw water for ash hydraulic transport; and160 m³/h of raw water for bottom ash and slag cooling.Regarding the stated 1:1 ratio, Annex I specifically refers to the preparation of fly-ash slurry. It records that the Power Plant reported a water-to-fly-ash proportion of approximately 1:1. However, the same document states that there are no flowmeters measuring the water quantity used and that the reported value appears underestimated. The 1:1 ratio should therefore not be interpreted as a confirmed or guaranteed mixing ratio for the entire bottom-ash and slag transport system. For the bottom-ash wastewater stream, Annex I separately records a continuous flow associated with boiler operation of approximately 4,800 m³/day, measured/estimated in the channel before mixing with sanitary wastewater. No separate verified water-to-bottom-ash/slag mixing ratio is provided in the Tender Documents. The Contractor shall therefore verify the actual water consumption, solids loading and slurry characteristics required for its final design. I would especially keep the distinction between fly ash slurry 1:1 and bottom ash/slag water. They are not the same system, and confirming 1:1 for both would go beyond what Annex I actually says.

New clarification added: Question:Will WWTP-A to E and the chemical store be defined as separate contractual Sections? For each, please specify taking-over conditions, commencement of the twelve-month DNP, transfer of operational responsibility, release of retention and reduction of securities. How will KEK’s use of an individual plant before overall taking-over be treated, and will delay to another Section affect Sections already taken over?Answer : As previously clarified, the ToR envisages construction and commissioning in two phases, and individual facilities may be completed, commissioned and taken over at different times. Where a facility is designated as a separate contractual Section, the Time for Completion, Taking Over, Delay Damages and the 12-month DNP will apply separately to that Section in accordance with Sub-Clause 1.15. Operational responsibility and any use by KEK before formal Taking Over will be handled in accordance with the applicable Taking Over provisions, including Sub-Clause 10.2. The Performance Security remains at 5% of the Contract Price and is not reduced following Taking Over, while the 5% Retention provisions apply as previously clarified. Please refer also to the previous clarification on Time for Completion and sectional milestones.Question : In the Excel price schedule, cell F13 for EMS REQUIREMENTS refers to F89, as does F14 for Utility connections, although the EMS subtotal is in F84. Please issue a corrected official workbook and verify all links to the Grand Summary. Please also confirm the authoritative PDF/XLSX version and arithmetic-correction rules so that bidders do not need to amend the prescribed forms independently. Answer :The cell references cited relate to the original Price Schedule of 17 August 2026, which has been superseded. UNOPS has verified Price Schedule Form – Update 1.xlsx (uploaded 3 September 2026). In that version, items 1.6 EMS Requirements (F12→F83) and 1.7 Utility Connections (F13→F88) link correctly, as do all links to the Grand Summary.The workbook since was reissued as Price Schedule Form – Update 2 (XLSX and PDF) with Amendment No. [3].  Only Price Schedule Form – Update 2   shall be used. Offerors shall not alter the structure or formulas of the forms. Offerors shall submit both the XLSX and a signed PDF; if they differ, the signed PDF prevails. Arithmetic errors will be corrected in accordance with Section I, Article 28.Question : Annex IV requires rehabilitation or replacement of inadequate networks and reconstruction of approximately 700 m and 1,000 m of open channels, whereas Schedule 2.1B-11 expressly lists mainly cleaning, waste and diagnostics. Please define the contractual boundaries, locations and tender quantities for rehabilitation and channel works. Will the unknown scope be covered by common provisional sums or measurable items, with payment based on approved diagnostic findings?Answer : With regard to the open channels, bidders shall allow for the concrete lining or reconstruction of approximately 700 m and 1,000 m of trapezoidal channels, with final dimensions and hydraulic capacity to be determined through the Contractor’s design.  For the existing wastewater network, preliminary inspections indicate possible local defects at approximately 14 locations within the DN 160–1200 network. The exact locations and quantities will be confirmed following cleaning, CCTV inspection and diagnostic assessment.  Schedule 2.1B-11 covers the cleaning and diagnostic activities. No separate provisional sum or remeasurement item is provided for subsequent rehabilitation/replacement works. Bidders shall therefore allow for such works in their tender in accordance with Annex IV and Sub-Clause 4.11 [Sufficiency of the Contract Price]. Under Sub-Clause 14.1 [The Contract Price], remeasurement applies only where expressly provided in the Schedule.Question :  Given the complexity of the integrated design and construction of five wastewater treatment plants and a chemical store within an operating power station, the need to coordinate interfaces with ESP/NOx and the future FGD, verify the rehabilitation scope for approximately 6.4 km of networks and 1.7 km of channels, obtain comparable quotations from specialist suppliers, and clarify design data, contract conditions and price-schedule discrepancies, we request an extension of the proposal submission deadline by at least thirty-five calendar days. We also request an extension of the clarification deadline and an opportunity to submit follow-up questions or responses for at least twenty-one calendar days after publication of the last set of substantive answers and the complete corrected documentation. Please set the final proposal deadline at least fourteen calendar days after publication of answers to these follow-up questions; if a subsequent answer materially changes the scope, price or technical solution, the deadline should be adjusted again accordingly.Answer: The RFP has been open since 17 August 2026, providing a tendering period of 70 calendar days, which UNOPS considers sufficient for the preparation of Proposals, including specialist supplier quotations. A second mandatory site visit on 25 September 2026 and an extension of the clarification deadline to 2 October 2026 have already been provided (Amendment 3). The deadline for submission of Proposals therefore remains 26 October 2026, and the clarification deadline remains 2 October 2026. No extension of deadline is planned at this moment.Question:We have not identified any requirement in the Tender Documents to carry out a survey of the existing site conditions or wastewater sampling and analysis prior to commencing the design. Please confirm that the wastewater data provided in the Tender Documents shall constitute the binding input data and design basis for the design and construction of the Works, as well as for the performance guarantee tests.Answer : The wastewater data provided in the Tender Documents, including Annex V, is provided as Site Data for information only and does not constitute warranted or binding input data for the final design or performance testing. The Contractor remains responsible for verifying and interpreting the available data and for carrying out any further investigations required for the design. The information in Annex V is intended to assist bidders in understanding the existing wastewater characteristics and in preparing their technical approach and pricing during the tender stage. As previously clarified under Price Schedule 2.1B – General Items, Item 1.1, the Contractor shall allow for the necessary investigations and design verification, including wastewater sampling, treatability testing, laboratory testing, site inspections and baseline data verification. The final design basis shall therefore be established and verified by the Contractor during the design stage, and the performance requirements shall be demonstrated through the applicable testing and commissioning procedures under the Contract. 

New clarification added: Question :Please confirm that the folder referenced in the Employer Requirements document contains the complete and current tender package comprising Volume 3 with its appendices and Volume 5 with all drawings, and identify the binding document and revision register. On page 4 of the ToR, the entry for V5.3.8 includes the note “all 19 drawings MISSING — not in project files”. Is this note still applicable? If not, please correct it; if it is, please identify and issue the missing drawings. Furthermore, the list on page 3 identifies V5.3.6 for WWTP-D, whereas the description on page 12 refers to V5_3_7. Please confirm the correct reference and amend the ToR accordingly.Which document and revision register is binding for the proposal?Answer : Binding documents: The folder referenced in the Employer Requirements document contains the complete and current tender package. The binding tender package consists of the documents attached to this RFP, as modified by the Amendments. Where documents conflict, the latest Amendment. Only documents published on UNGM are binding. No separate revision register applies.Note on V5.3.8: The note stating "all 19 drawings MISSING — not in project files" is an internal drafting note. Please disregard it.WWTP-D reference: The correct reference is V5.3.6 (Arrangement plan of WWTP-D). The reference to V5_3_7 on page 12 of the ToR is an error please disregard it. Question : The attached project programme has not been updated to reflect the dates and timeframes stated elsewhere in the tender documentation. We request that the Employer issue an updated and coordinated programme covering all project phases. Considering the scale and complexity of the project and our experience with comparable projects, we consider the six-month design period stated in ToR Section 4.1 to be significantly too short. In our experience, the Design Stage, encompassing all required design documentation stages, multidisciplinary coordination, UNOPS/IPMG reviews, resolution of comments, and obtaining the necessary consents and permits, takes between fifteen and eighteen months. This duration assumes timely provision of complete and adequate input data by the Employer, together with timely reviews and decisions by the relevant stakeholders.We therefore request that the Employer allow fifteen to eighteen months for the Design Stage in the updated programme, commencing upon delivery of all input data required to start the design, confirm the revised design period, and align the remaining tender documentation accordingly. Please also confirm that delays in providing data or approving documentation that are not attributable to the Contractor and affect the critical path of the design programme will constitute grounds for an appropriate further extension of time.Answer : The programme included in the Tender Documents is indicative. As stated in ToR Section 4.1, the design is expected to take approximately six months; however, bidders shall develop and submit their own detailed and coordinated programme appropriate to the complexity of the project.The UNOPS/IPMG Design Review will be undertaken progressively during design development, rather than only upon completion of the final design. Reviews are structured through the Design Brief, Concept Design, Developed Design and Technical Design stages, allowing comments to be addressed progressively and supporting timely design development.Furthermore, design packages for the individual WWTPs may be submitted and reviewed separately, allowing each facility to progress independently through the review and approval process.As stated in ToR Section 3.3, construction is also expected to be implemented in two phases, taking into account the interface with the ongoing ESP/NOx Project and site-access restrictions.Accordingly, the Employer does not prescribe a 15–18 month Design Stage. The bidder’s proposed Programme (Schedule 2.2) and Approach and Method Statement (Schedule 2.3) will be assessed and scored during the technical evaluation in accordance with Section II – Evaluation Methods and Criteria.Any entitlement to an Extension of Time will be assessed in accordance with Sub-Clause 8.4 [Extension of Time for Completion] and Sub-Clause 20.1 [Contractor’s Claims].Question : Question: Based on our experience in designing facilities of comparable scale and complexity, the proposed six-month design period is significantly too short if it must encompass all required stages: verification of input data, preparation of the Design Brief, Concept Design, Developed Design, detailed Technical Design, multidisciplinary coordination, all required UNOPS/IPMG reviews and approvals, resolution of comments, and obtaining the necessary consents and permits. The programme must also account for the design of five wastewater treatment plants and a chemical storage facility, interfaces with existing systems within an operating power station, and dependencies on information and decisions from the Employer, KEK, other contractors and statutory authorities.Will the Employer extend the six-month timeframe accordingly or allow bidders to submit a longer, technically substantiated design programme without their proposals being considered non-compliant or receiving a lower evaluation score? Please also confirm which activities must be included within this period, the event that triggers its commencement, and how delays in the provision of input data, reviews, approvals and permits that are not attributable to the Contractor will be treated.Answer : The Terms of Reference (ToR) outlines a phased approach for construction and commissioning, aligned with the ongoing ESP/NOx Project and related site-access and coordination constraints. Phase one will include WWTP-B, WWTP-C and WWTP-E, followed by WWTP-A, WWTP-D and the Chemical Storage Building, subject to site conditions, access availability and coordination requirements. Each facility may be completed, commissioned and taken over at different times. Where a facility is designated as a separate contractual Section, its Time for Completion, Taking Over, Delay Damages and Defects Notification Period will apply separately in accordance with Sub-Clause 1.15 [Sections]. These arrangements will be detailed in the completed Contract Schedules. For any facility or Section taken over, the 12-month Defects Notification Period will commence from its Taking Over date. Operational responsibility will transfer in accordance with the applicable Taking Over arrangements and the training/joint-operation requirements specified in the ToR. If KEK or the Employer uses part of the Works before formal Taking Over, such use will be governed by Sub-Clause 10.2 [Taking Over of Parts of the Works]. Unless otherwise agreed or provided for under the Contract, a part used before issuance of a Taking Over Certificate may be deemed to have been Taken Over from the date of such use. For facilities designated as separate Sections, delay affecting one Section will not affect the Taking Over date or commencement of the DNP for another Section already Taken Over. Delay Damages will apply to the relevant Section in accordance with the Contract. As previously clarified, the Performance Security will remain at 5% of the Contract Price and will not be reduced following Taking Over, remaining in place until expiry of the applicable Defects Notification Period. The 5% Retention provisions will apply in accordance with the Contract and the completed Contract Schedules.

New amendment added #3: Please be advised of the following updates to the tender schedule and eSourcing requirements:Second Mandatory Site Visit Added: An additional site inspection is scheduled for Friday, September 25, 2026, at 13:00 hrs (Registration deadline: Wednesday, September 23, 2026). Further details can be found under the Particulars tab of the tender. Attendance at a site visit remains a mandatory prerequisite for submitting a bid. However, offerors who attended the initial inspection on August 31, 2026, have already satisfied this requirement and do not need to attend again.Clarification Deadline Extended: The deadline for clarifications has been extended to Friday, October 2, 2026. Please note that the Tender Submission Deadline remains unchanged at Monday, October 26, 2026.Additional Tender Documentation : Please be advised that "Section I – Instructions to Offerors" (file: Section I - INSTRUCTION TO OFFERORS.pdf, uploaded on 17 September 2026) has been published in the Documents tab and forms an integral part of RFP/2026/63431. Offerors shall read Section I together with the Particulars and all other tender documents, and shall confirm receipt of this amendment in Schedule 0.11 [Acknowledgement of the Addenda].Updated  Section IV – Price Schedule Form (Update 2) is attached to the tender. Insurance validity periods in items 1.1.1–1.1.3 of Schedule 2.1B-1 are being corrected.UNOPS advises all offerors to review the published amendment carefully and remain up to date with the tender documentation.

New clarification added: Question : Could you please provide the complete “Section I: Instructions to Offerors” applicable to RFP/2026/63431, including Article 4 – Offeror Eligibility and Article 11 – Content of Proposal Submissions?Answer : Section I: Instructions to Offerors, including Article 4 [Offeror Eligibility] and Article 11 [Content of Proposal Submissions], has been published in the Documents tab of the eSourcing system (file: Section I - INSTRUCTION TO OFFERORS.pdf, uploaded on 17 September 2026). It forms an integral part of RFP/2026/63431, as confirmed in Amendment No. 3. Offerors shall acknowledge the amendment in Schedule 0.11 [Acknowledgement of the Addenda].Question : If Section I was not intended to be issued as a separate document, could UNOPS please identify the document(s), section(s), or e-Sourcing requirements that constitute the authoritative equivalent of Articles 4 and 11?Answer : Please refer to the response to Clarification No. 31. Section I was intended to form part of the tender package and has now been published. No other document is to be considered an equivalent of Articles 4 and 11. Section I shall be read together with the Particulars, Section II: Evaluation Method and Criteria, and Section IV: Returnable Schedules.Question : Could UNOPS please confirm the complete eligibility criteria applicable to the present RFP, including whether the eligibility requirements are limited to those expressly stated in Section II – Evaluation Method and Criteria and the other documents currently available to bidders?Answer : UNOPS confirms that eligibility and qualification are assessed only against the requirements in the RFP documents published in eSourcing, as amended by the addenda issued to date. No undisclosed criteria will be applied. The relevant documents are the Particulars, Section I – Instructions to Offerors Section II – Evaluation Method and Criteria, , Section IV – Returnable Schedules, and the Terms of Reference.Question : Could UNOPS please confirm the complete list of documents and technical documentation that constitute the “Content of Proposal Submissions” referred to under Article 11, including any requirements contained only in the e-Sourcing portal or submission placeholder fields?Answer : In accordance with Article 11, the Proposal must consist of the completed, signed, and dated returnable schedules located in Section IV: Returnable Schedules (Update 1), along with all annexed supporting documents. For the complete, consolidated list of required documents—including any specific eSourcing platform requirements—please refer to both Schedule 0.13 [Proposal Checklist] and the eSourcing system checklist (When submitting the bid).Question : For the avoidance of doubt, could UNOPS please confirm that no bidder will be considered non-compliant for failure to submit a document or satisfy a requirement contained exclusively in the missing Section I, Article 4 or Article 11, unless that requirement has been made available to all bidders through an official tender document, addendum, clarification, or clearly identified e-Sourcing requirement?Answer : Section I: Instructions to Offerors has been published in the eSourcing Documents tab and incorporated into the tender by Amendment No. 3. It is an integral part of RFP/2026/63431 and is available to all offerors on equal terms. Its requirements, including Articles 4 and 11, apply to all proposals, and offerors shall take its content into account when preparing their proposals. Proposals will be assessed in accordance with Section I and Section II: Evaluation Method and Criteria, as amended.

New clarification added: QUESTION :  We would like to participate in the published tender; however, due to various circumstances, it was unable to attend the site visit as required. Therefore, respectfully requests that the requirement set out in Section I, paragraph 4(vi), be amended so that the site visit is recommended rather than an automatic ground for rejection. If UNOPS considers physical attendance indispensable, we request at least one additional site visit, open to all prospective bidders on equal terms.Grounds for the requestThe RFP was published on 17 August 2026. The Tender Particulars in eSourcing displayed 16 July 2026 as the site visit date, while the detailed instructions stated 31 August 2026. Based on the times displayed in the official record, this inconsistency was corrected on 27 August at 16:24, approximately 24 hours and 36 minutes before registration closed on 28 August at 17:00 CEST.The rule that attendance by one Joint Venture (JV) member was sufficient had been communicated earlier. However, the express clarification that attendance by a subcontractor would not be accepted, and that the participating legal entity had to be the bidder JV member, is recorded as edited on 28 August at 16:29. According to the displayed times, only 31 minutes remained before registration closed. As the public ‘Edited on’ field does not identify the applicable time zone, we request that UNOPS confirm the operative publication time and time zone. The site visit was held only once, on 31 August, while the proposal submission deadline is 26 October 2026.Proportionality and effective competitionWe recognise the importance of the site visit for understanding technical conditions and safety requirements. However, automatic rejection because an bidderdid not attend a single, non-repeated event does not assess that offeror’s technical, financial or professional capacity. In the circumstances, the requirement has a disproportionate exclusionary effect and restricts competition beyond what appears necessary.Section II, criterion 2.1, already awards four points for an offeror’s ‘Understanding of scope, site and constraints’, assessed through Schedule 2.3 and Schedule 2.2 (Programme). Section 3.3 of the Terms of Reference indicates that controlled physical inspection and surveying can be coordinated through the UNOPS Project Manager. These provisions support a substantive assessment of site knowledge and the feasibility of another controlled visit, subject to the same safety requirements.Section 6.7 of the UNOPS Procurement Manual requires sufficient time for suppliers to plan attendance and provides that site inspections are not mandatory unless valid reasons exist. Where attendance is mandatory, it must be required in a non-discriminatory manner. Sections 1.4.2, 1.4.3 and 1.5.2 protect equal opportunities, effective competition and the avoidance of unnecessarily restrictive conditions, while section 6.6.4 permits UNOPS to amend the solicitation documents before the submission deadline.Answer: UNOPS thanks the offeror for its request.Attendance at a site inspection remains a mandatory eligibility requirement.To ensure equal opportunity for all prospective offerors, a second mandatory site inspection has been scheduled by Amendment No. 3. It is open to all prospective offerors on equal terms:IMPORTAN NOTE  : Attendance at a site visit remains a mandatory prerequisite for submitting a bid. However, offerors who attended the initial inspection on August 31, 2026, have already satisfied this requirement and do not need to attend again.A group Site inspection will be held as follows:Date: Friday, September 25, 2026Time: 13:00 hrs (CEST, UTC+2)Facility: Kosovo B Power Plant (Termocentrali Kosova B)Location: Obiliq, Kosovo (approx. 10 km west of Pristina)GPS coordinates: 42.6931, 21.0560Assembly point: Main security gate, no later than 15 minutes before the stated timeInterested parties shall register no later than two (2) days before the Site inspection, i.e. by Wednesday, 23 September 2026 at 17:00 hrs (CEST, UTC+2), using the following link:https://forms.gle/nLYdXZjPu9A842qZ7Registration shall state the offeror's name and the full name, position, passport/ID number and nationality of each attending representative. Registrations received after the deadline cannot be accommodated, as site access is subject to security clearance by the plant operator.Arrival and site accessCheck-in: All visitors shall register at the main security gate prior to site entry.Identification: Photo ID or passport is required at security control, matching the details submitted at registration.Mandatory PPE: Safety helmet, high-visibility vest and steel-toe safety boots are required for all visitors entering operational areas. Attendees shall provide their own PPE; access to operational areas will be refused without it.All attendees shall comply with the site safety rules of the plant operator and with the requirements referred to in Appendix 3-E [Health and Safety for Site Works].All costs associated with attending the Site inspection are borne by the offeror. Statements made during the Site inspection do not amend the RFP. Any clarification arising will be issued in writing to all offerors in accordance with Article 8

New clarification added: Clarification request no. 8We would kindly like to ask Employer to publish list of all minimum required construction machinery for civil works.Clarification response no. 8For a Design & Build contract, the Contractor is responsible for determining the equipment necessary to execute the Works based on its proposed methodology, programme, sequencing and site conditions. Accordingly, UNOPS will not prescribe a minimum list of construction machinery for the civil works.As provided in Section IV – Returnable Schedules, Schedule 2.7 [Contractor’s Equipment and Machinery], each Offeror shall identify the equipment and machinery it proposes to use, including the description, number of units and relevant remarks, including whether the equipment is owned or rented.The proposed equipment and machinery shall be adequate for the nature, scale and timely execution of the Works and shall comply with the applicable Contract requirements.

New clarification added: Clarification request no. 7Please confirm our understanding that for position Quality Control Engineer we can also nominate person with education from other technical sciences (mechanical, electrical,…). Now only construction is allowed and this is highly limiting. Clarification response no. 7The requirement may also be met by candidates holding a Bachelor’s degree in Mechanical Engineering, Electrical Engineering, or another relevant technical engineering discipline, provided that the proposed person has at least seven (7) years of relevant experience in civil engineering, quality assurance, construction management, or construction-related quality control and can demonstrate experience appropriate to the responsibilities of the Quality Control Engineer.A Mechanical or Electrical Engineer may therefore be proposed for this position where their professional experience demonstrates sufficient competence in construction quality assurance and quality control.This information has also been provided in the amended TOR.

New clarification added: Clarification request no. 6Please confirm our understanding that one person can be nominated on more positions (for example two) as long as it’s qualifications meet all the required qualifications as per single position. This is usual practice in similar tenders. Thank you in advance for your confirmation.Clarification response no. 6Each Key Personnel position shall be filled by a separate individual who meets the qualification and experience requirements specified for that position, as set out in the ToR and Section II – Evaluation Method and Criteria. In addition, each Key Person must be available for the period foreseen for the respective position, as specified in the ToR. The same individual should therefore not be nominated for more than one Key Personnel position.

New clarification added: Clarification request no. 5We would kindly like to ask when can we expect to receive minutes of the site visit, from 31st August?Clarification response no. 5The minutes of the mandatory site visit held on 31 August 2026 have been published through the UNOPS eSourcing portal on 3 September 2026.

New amendment added #2: Kindly note the following documents and eSourcing sections that have been amended: 1. Update of the Returnable Form, specifically Schedule 0.2.2. Update of the Price Schedule Form.3. Update of the Terms of Reference (ToR) document, Section 5.6. Contract Payments and Section 10. Proposed Project Team and Organisational Structure Evaluation Criteria - Quality Control Engineer.4. Update of the Performance Bank Guarantee requirements section in the eSourcing.5. Mandatory Site Visit Minutes have been uploaded at the Documents Section Tab in the eSourcing.Please note that the removed requirements/specifications are marked with strikethrough, while the newly added requirements have been highlighted in red.UNOPS advises to remain up to date with the published amendment. 

New clarification added: Part 2 of clarifications no. 36. Mechanical Materials and Stainless-Steel GradesThe Mechanical Requirements frequently refer to “stainless steel” or “suitable stainless steel” without specifying the required grade.Please confirm the minimum stainless-steel grades required for equipment, piping and components used in wastewater, sludge and chemical services.Response:As this is a Design & Build Contract, the Contractor is responsible for selecting and demonstrating the suitability of materials for each process and service condition.Where the Employer’s Requirements specify “stainless steel” or “suitable stainless steel” without defining a grade, EN 1.4404 (AISI 316L) shall be considered the minimum grade for wetted process pipework, fittings, flanges and components in wastewater and sludge service.For chemical services, and wherever operating conditions are more aggressive, the Contractor shall select a more corrosion-resistant material where required, based on the actual chemical composition, concentration, chloride content, pH, temperature, sulfides and operating environment.The proposed material grades and corrosion-resistance basis shall be clearly identified and justified in the Contractor’s design submissions. Any more stringent material requirement stated elsewhere in the Employer’s Requirements shall remain applicable.Reference: Employer’s Requirements – Volume 3, Appendix 3-A: Mechanical Requirements, together with the applicable EN/international standards and the wastewater analysis data provided with the tender. The ToR confirms Appendix 3-A as part of the Employer’s Requirements.7. Liquid Assets and Credit FacilitiesPlease confirm the minimum amount of liquid assets, lines of credit or other financial resources that the Bidder is required to demonstrate for this Contract.In the case of a Joint Venture, please also confirm whether this requirement may be met by all JV members combined and whether any minimum percentage must be demonstrated by the Lead Member or by each individual member.Response:The Offeror must demonstrate sufficient liquidity and financial capacity by meeting the specified requirement of an average current ratio (current assets/current liabilities) of ≥ 1.0 over the last three (3) years.In the case of a Joint Venture, this requirement must be met separately by each JV partner. The current ratio of the JV members cannot be combined to meet the requirement.No additional lines of credit or other financial resources are required or considered under this financial capability criteria. 

New clarification added: Clarification request no. 31. Construction Permit DocumentationPlease clarify which statutory and administrative fees associated with obtaining the Construction Conditions and Construction Permit documentation shall be borne by the Contractor.Response:Construction Permit fees are expected to be paid by the Beneficiary (KEK), where such statutory fees are identified as the Beneficiary/Employer’s responsibility.However, the Contractor remains responsible for preparing the complete design and technical documentation required for the Construction Permit and for supporting and progressing the statutory approval process.The Final/Detailed Design and all related design documentation shall be prepared in both English and Albanian. The Albanian version is required for documentation to be submitted on behalf of KEK to the competent authorities in Kosovo. The ToR specifically requires all design documentation to be provided in both English and Albanian.2. Main Electrical ConnectionPlease confirm the exact existing 6.3 kV feeder and cubicle designated for the connection of the new 1,000 kVA transformer at WWTP-B.Response:As explained during the mandatory site visit, spare 6.3 kV electrical cubicle(s) are available within the Kosovo B facility for connection of the new 1,000 kVA transformer serving WWTP-B.A specific feeder/cubicle is not designated at tender stage. The final connection point will be confirmed during the detailed design and coordinated with UNOPS/KEK based on the available cubicle and existing electrical system configuration.The Contractor shall include in its scope all necessary 6.3 kV cabling, cable trays, ducts/canals, terminations and associated connection works from the designated cubicle to the new transformer.3. SCADA Control RoomPlease confirm the exact location of the new SCADA control room/operator room for the WWTP system and clarify whether:An existing room will be allocated and adapted for this purpose; orA new control room/building shall be designed and constructed by the Contractor. Response: The Employer’s Requirements do not prescribe a fixed location for the central SCADA control/operator room or identify an existing room to be allocated for this purpose.As this is a Design & Build Contract, the Contractor shall develop the SCADA control architecture and propose the appropriate location for the central operator/control room as part of the design, ensuring effective monitoring, supervision and control of all WWTPs. The Employer’s Requirements specifically require the Contractor to provide the specialist SCADA system(s).Taking into consideration the planned phased implementation of the Works, it is recommended that the central SCADA/operator room be established within one of the WWTP facilities implemented at an early stage, so that it can support operation and supervision as subsequent WWTPs are completed.WWTP-B is considered the most suitable location, as the Employer’s Requirements already provide for a plant building and main electrical room at this facility. WWTP-C may also be considered by the Contractor as part of its design solution; however, the current Employer’s Requirements do not provide for a building at WWTP-C. The final location and arrangement shall therefore be justified by the Contractor and submitted for Employer review and approval4. Design Working LifePlease confirm the required design working life of the civil structures and buildings, as well as the minimum required service life of the mechanical, electrical, instrumentation and control equipment.Please also clarify whether shorter service lives are acceptable for replaceable equipment and components, subject to the specified operation, maintenance and replacement requirements.Response: As specified in the Employer’s Requirements – Volume 3: Technical Specification, Sections 1.1 “Aims and Objectives” and 3.5 “Maintaining Waste Water Emissions Performance over Long Term,” the WWTPs are required to have an overall design and operational life of at least 25 years.Civil structures and buildings shall be designed accordingly. Shorter service lives are acceptable for normally replaceable mechanical, electrical and I&C equipment, provided their maintenance and replacement do not compromise the required 25-year plant performance, reliability, safety and compliance.5. Concrete Classes and Durability RequirementsPlease confirm whether there are limitations related to concrete classes and exposure classes  prescribed for the buildings, underground structures, water-retaining structures and wastewater-containing structures.Response:As this is a Design & Build Contract, the Contractor is responsible for determining and justifying the appropriate concrete strength classes, exposure classes, cover, durability and protection requirements for each structure as part of the detailed design. The development of the design is expressly the Contractor’s responsibility.The Employer’s Requirements do not establish one uniform concrete or exposure class for all structures. The Contractor shall select the appropriate classes for buildings, underground structures, water-retaining and wastewater-containing structures, taking account of the actual environmental and chemical exposure, watertightness and the required long-term performance.The design shall comply with Volume 3 – Appendix 3-B: Civil Requirements, applicable national/international structural standards, and relevant liquid-retaining structure requirements. The applicable stricter requirement shall govern where standards differ.The proposed concrete and exposure classes shall therefore be defined, justified and submitted by the Contractor as part of the design for review and approval.The response for question 6 and 7 will follow in a separate clarification. 

New clarification added: Clarification request 2 for question no. 77. Governing design flows and loadsQuery: Different documents contain differing design flow information, including the WWTP-C figures in Annex I and V3 Technical Specification. Please issue or identify the governing consolidated design-basis matrix for all five WWTPs, including minimum, average, peak and design flows; pollutant loads; future FGD contribution; redundancy requirements; and required discharge limits.Response to question no. 7The governing design requirements for the Works are those stated in the Employer’s Requirements, principally Volume 3 – Technical Specification, including Section 4.2 and the relevant Volume 3 appendices. Annex I – TPP Kosovo B Wastewater Background Information provides historical and background information on the existing wastewater streams and operating conditions. The ToR specifically directs bidders to Volume 3, Section 4.2 for the detailed requirements for the WWTPs.Accordingly, where design flow or treatment requirements differ between the historical information in Annex I and the requirements stated in Volume 3, bidders shall use the requirements stated in Volume 3 as the design basis. Annex I records a combination of continuous and irregular wastewater streams and should be used as supporting background information.As this is a Design & Build Contract, the Contractor shall develop and substantiate the final hydraulic and process design basis for each WWTP, including the applicable minimum, average, peak and design flows, pollutant loads, hydraulic/process capacity and operating scenarios, based on the Employer’s Requirements and the wastewater information provided with the tender.Bidders should also take into account that TPP Kosovo B operates continuously on a 24/7 basis. Accordingly, certain process wastewater streams are continuous or relatively steady, while others are intermittent or variable depending on the specific plant process and operating conditions. In particular, WWTP-C flows are strongly influenced by stormwater events, while sanitary flows to WWTP-E may vary with workforce shift patterns. The Contractor shall account for the operating characteristics of each individual wastewater stream when establishing the minimum, average, peak and design flows.For WWTP-D, the design shall account for the FGD plant effluents together with the Water Treatment Plant effluents, as required by the Employer’s Requirements.The applicable redundancy requirements shall be those specified in the Employer’s Requirements and relevant technical specifications; no additional redundancy requirement is introduced by this clarification.The required treated-effluent quality shall comply with the applicable discharge limits specified in Volume 3, Appendices 3-1 and 3-2, covering the relevant EU and Kosovo requirements.No separate consolidated design-basis matrix is issued by this clarification. The Contractor shall identify and clearly document its proposed design basis and assumptions for each WWTP as part of the design submissions. 

New clarification added: Kindly note of the following re-clarification regarding question 12 of the Clarification request no. 2:12. Retention and performance securityQuery: The Tender Particulars specify a 10% Performance Security and the ToR refers to 10% retention, with staged release during the 12-month Defects Notification Period. Please confirm these percentages and release conditions in the completed Contract Schedule, including whether the Performance Security may be reduced after Taking Over.Re-clarification response:The percentages and applicable release conditions have been amended and shall be as follows:Performance Security: The Performance Bank Guarantee shall be 5% of the Contract Price. It shall remain valid and be held for the entire Contract Period and until the end of the Defects Notification Period (DNP). Accordingly, the Performance Security shall not be reduced following Taking Over and shall remain in place until the expiry of the DNP.Retention: 5% shall be withheld from each Interim Payment Certificate (IPC) / payment milestone. Fifty percent (50%) of the total accumulated Retention amount shall be released upon issuance of the Completion Certificate, and the remaining fifty percent (50%) shall be released upon the expiry of the DNP.This amendment will reflect in the esourcing as well as in the ToR document.

New clarification added: Question :  A company  registered four representatives within the stated deadline and intends to attend the mandatory Site Inspection on 31 August 2026. The final consortium and contracting structure is still being determined, the company  may ultimately participate as a declared local subcontractor rather than as the lead offeror or a formal JV member. Would attendance by the representatives registered by A company satisfy the mandatory Site Inspection requirement for a subsequent proposal submitted by a different lead offeror or JV, provided that the attendees carry a written authorisation from that lead offeror/JV and a company is identified in the proposal as a declared subcontractor?Answer : No. Attendance at the mandatory Site Inspection is an eligibility condition of the offeror. Under Section I, Article 4(vi), an offeror that did not attend, in person or through a duly authorised representative, is ineligible to submit a proposal and its proposal will be rejected as non-compliant. In the case of a joint venture, attendance by any one JV member satisfies the requirement for the whole JV. The requirement does not extend to subcontractors: attendance by an entity that is subsequently declared only as a subcontractor does not count as attendance by the lead offeror or any JV member.Question : If this would not satisfy the requirement, may the existing registration be amended before the Site Inspection to identify the prospective lead offeror/JV while retaining the same registered attendees? If so, please specify the form of authorisation and any information that must be submitted.Answer: Yes. The existing registration may be amended up to the registration deadline of 28 August 2026, 17:00 CEST, retaining the same individuals. The amendment must be sent via registration form  :https://forms.gle/oWvHnFsXp1KCxzrr5 Question : Does the offeror/JV identity need to have been finalised and registered by the registration deadline of 28 August 2026 at 17:00 CEST, or is attendance through a duly authorised representative sufficient under the Site Inspection notice?Answer : The final JV composition need not be finalised or registered by the registration deadline. What must be identified by the deadline is the entity on whose behalf each representative attends. That entity must appear in the eventual proposal as the offeror or as a JV member

New clarification added: 9. Time for Completion and sectional milestonesQuery: The ToR refers approximately to six months for design and two years for construction and commissioning, while the Contract Schedule of Details is blank. Please confirm the binding overall Time for Completion and whether separate completion periods or delay damages apply to individual WWTPs, the chemical storage facility, training and joint-operation stages.Response: The durations stated in the ToR are indicative planning durations. The ToR envisages approximately six (6) months for design, with construction and commissioning implemented in two phases, together with the required training and joint-operation activities.As stated in ToR, Section 3.3 – Site Restrictions (page 13), the proposed phasing reflects the interface with the ongoing ESP/NOx Project at the operational Kosovo B power station and the resulting potential restrictions on access and concurrent construction activities. The ToR therefore anticipates an initial phase for WWTP B, C and E, followed by WWTP A, D and the Chemical Storage Building, subject to actual site conditions and coordination requirements.The detailed sequencing and whether activities are undertaken simultaneously or sequentially will depend on the bidder’s proposed methodology, resources and programme. Individual facilities may therefore be designed, constructed, commissioned and taken over at different times.Where individual facilities are established as separate contractual Sections, the applicable Time for Completion will be defined for each Section in the Contract Schedules. Taking Over, the Defects Notification Period and Delay Damages will then apply separately to the relevant Section in accordance with the Contract. The overall and sectional completion requirements will be reflected in the completed Contract Schedules.10. Gender participation requirementQuery: The pre-bid information refers to involvement of at least three female staff, while the formal evaluation criteria award points for one or two women in Key Personnel positions 4.2–4.7. Please confirm whether three female staff is a mandatory compliance requirement, a project implementation objective, or only part of the scored sustainability criterion.Response: There is no minimum number of female personnel required. The provision is a scored sustainability criterion, not a mandatory compliance requirement, and no proposal will be rejected on this basis.Under Section II, criterion 4.5 [Sustainability Criteria], two or more women proposed in Key Personnel positions 4.2–4.7 receive the maximum 3 points; one woman receives 1 point.The reference at the pre-bid meeting to the engagement of at least three persons concerns university engineering trainees during implementation and does not establish a requirement for three female Key Personnel. Section II [Evaluation Methods and Criteria] governs the evaluation of proposals.11. Surveys and technical investigationsQuery: Please confirm whether updated geotechnical, topographical, environmental and utility survey information will be issued before the clarification deadline. If not, please clarify which investigations must be undertaken by the Contractor after award and how bidders should price risks arising from incomplete or non-warranted site information.Response:  As stated in Price Schedule 2.1B – General Items, Item 1.1 (Note), the geodetic/topographical surveys and the Environmental Impact Assessment (EIA) are currently in progress under a separate Employer contract and are expected to be completed in October 2026. These activities are excluded from the Contractor’s scope and, once completed, the documents will be provided to the awarded Contractor as baseline data.However, bidders must include in their pricing all other necessary investigations and design verifications specified under Item 1.1. These include geotechnical and hydrogeological investigations, laboratory testing, wastewater sampling and treatability testing, underground utility scanning and mapping, site inspections, and baseline data verification.12. Retention and performance securityQuery: The Tender Particulars specify a 10% Performance Security and the ToR refers to 10% retention, with staged release during the 12-month Defects Notification Period. Please confirm these percentages and release conditions in the completed Contract Schedule, including whether the Performance Security may be reduced after Taking Over.Response: The required Performance Security is 10% of the Contract Price. A 10% retention is to be deducted from applicable interim/milestone payments, with 50% of the accumulated retention released upon Taking Over/commencement of the Defects Notification Period and the remaining 50% following expiry of the 12-month DNP, subject to completion of outstanding defect-remedial obligations.

New clarification added: 1. Schedule 0.2 – Ethiopia-specific requirementsQuery: Schedule 0.2 requests a business licence valid in Addis Ababa/Ethiopia and a Grade-1 General/Building Contractor registration. Please confirm that these requirements were included in error and clarify the registration evidence required from an international bidder or JV member for this Kosovo project, both at proposal submission and before contract signing.Response: CONFIRMED: The Ethiopia-specific licence and Grade-1 contractor requirements in Schedule 0.2 were included in error and do not apply to this procurement. For a JV, at least one partner performing works or design services in Kosovo must hold the required Kosovo registration by Contract signing. A revised Schedule 0.2 will be issued.2. Price Schedule formulaQuery: In worksheet “2.1B-1 Preliminaries & General A”, cell F13 for EMS Requirements refers to F89, while cell F14 for Utility Connections also refers to F89. The EMS subtotal appears to be in F84. Please issue a corrected official Excel Price Schedule and confirm that bidders should not independently modify the protected formulas.Response: CONFIRMED: The formula error is confirmed. UNOPS will issue a corrected Excel Price Schedule through eSourcing. Bidders shall use the revised file and must not modify the protected formulas.3. Incomplete Schedule of DetailsQuery: The Design-Build Contract contains “[insert]” placeholders for several material commercial provisions, including Time for Completion, Defects Notification Period, access date, working hours, delay damages rate and cap, provisional sum percentage, retention, currency of payment, liability cap and place of arbitration. Please issue a completed Schedule of Details before the clarification deadline.Response: UNOPS confirms that the Design-Build Contract issued with this RFP is the form of contract that will be executed with the successful offeror, and that Schedule 1 [Schedule of Details] will be completed at contract award. Provisions such as Time for Completion, the Defects Notification Period and delay damages, etc are set out in the Particulars of this RFP, Annex A [Terms of Reference] and Annex B [Employer's Requirements]. Offerors are invited to submit any further specific queries through the clarification procedure under Section I, Article 8.4. Advance/mobilisation paymentQuery: The eSourcing Tender Particulars state that advance payment is not allowed, while ToR Section 5.6 states that mobilisation payments may be payable against a UNOPS-approved Bank Guarantee. Please confirm which provision prevails.Response: No advance payment shall be assumed. Payments will be made against certified Contract milestones. The ToR reference to possible mobilisation payment does not create an entitlement.5. Whole-Life Cost informationQuery: Addendum No. 001 requests whole-life cost estimates and operational strategies. However, Section II requires the technical proposal to contain physical quantities only and warns that financial information in the technical proposal may lead to rejection. Please confirm whether: (a) the technical proposal should contain only physical consumption/replacement quantities; and (b) all monetary whole-life cost information should be included exclusively in the financial proposal. If monetary whole-life costs are required, please identify the relevant Price Schedule line or form.Response: (a) Confirmed. The Technical Proposal shall contain physical lifecycle quantities only — energy consumption, chemical and reagent dosing, sludge production, and replacement intervals and quantities for consumable and wear items — without prices, rates, currency symbols or cost totals. (b) No monetary whole-life cost submission is required, in either the Technical or the Financial Proposal. There is accordingly no Price Schedule line for whole-life costs. The Financial Proposal comprises Schedules 2.1.A, 2.1.B and 2.1.C only, as issued.The information requested under Addendum No. 001 is sought as a technical demonstration of operational efficiency and maintainability over the design life, and shall be submitted within Schedule 2.3 [Method Statement]. Submission of lifecycle information in physical quantities in accordance with this response will not be treated as financial information in the Technical Proposal and will not give rise to rejection under Section II.6. Existing wastewater network and open canalsQuery: Annex IV refers to approximately 6.4 km of existing wastewater networks and approximately 1.7 km of open canals that may require cleaning, rehabilitation, reconstruction or replacement, while the exact quantities and conditions remain uncertain. Please confirm whether all such works are included in the lump-sum price. If they are to be treated as provisional sums or remeasured works, please provide the applicable quantities, provisional amounts, measurement rules and Price Schedule items.Response: CONFIRMED: A new item WN.5 – Open Canal Reconstruction has been added to Price Schedule 2.1B-11 – WN Wastewater Network for the approximately 1,700 m of open discharge canals. Bidders shall price this item in the revised Price Schedule.7. Governing design flows and loadsQuery: Different documents contain differing design flow information, including the WWTP-C figures in Annex I and V3 Technical Specification. Please issue or identify the governing consolidated design-basis matrix for all five WWTPs, including minimum, average, peak and design flows; pollutant loads; future FGD contribution; redundancy requirements; and required discharge limits.Response: Your question is well received, we will provide a response to this query in the coming days.8. Site inspection dateQuery: The Tender Particulars display 16 July 2026 as the site inspection date, while the detailed instructions specify the mandatory inspection on 31 August 2026 at 13:00 CEST. Please confirm that 31 August 2026 is the correct and governing date.Response: CONFIRMED: The mandatory Site Inspection will be held on Monday, 31 August 2026 at 13:00 hrs (CEST, UTC+2) at the Kosovo B Power Plant (Termocentrali Kosova B), Obiliq. Assembly is at the main security gate no later than 12:45 hrs.The date of 16 July 2026 shown in the eSourcing Particulars field is an error and shall be disregarded. It will be corrected by Amendment on the eSourcing platform. In the event of any inconsistency, the date stated in this response and in the Site inspection details governs.

New amendment added #1: To Add Pre-Biding Meeting Minutes to the tender. 

New clarification added: Dear Supplier, This is a kind Reminder to register for Mandatory Cite Visit. Please note, that the attendance is mandatory and is a prerequisite for submitting a proposal. Proposals from offerors who did not attend the Site inspection, in person or through a duly authorised representative, will be rejected as non-compliant. In the case of a joint venture, attendance by any one member satisfies this requirement on behalf of the joint venture.RegistrationInterested parties shall register no later than two (2) days before the Site inspection, i.e. by Friday, 28 August 2026 at 17:00 hrs (CEST, UTC+2), using the following link:https://docs.google.com/forms/d/e/1FAIpQLSc9NY98EZVybWjpLp3QF-S3hDA0Qu1nUSks83mEO-DNmgkQhQ/viewformRegistration shall state the offeror's name and the full name, position, passport/ID number and nationality of each attending representative. Registrations received after the deadline cannot be accommodated, as site access is subject to security clearance by the plant operator.Additional Details of the Mandatory Site Inspection: A group Site inspection will be held as follows:Date: Monday, 31 August 2026Time: 13:00 hrs (CEST, UTC+2)Facility: Kosovo B Power Plant (Termocentrali Kosova B)Location: Obiliq, Kosovo (approx. 10 km west of Pristina)GPS coordinates: 42.6931, 21.0560Assembly point: Main security gate, no later than 15 minutes before the stated timeArrival and site accessCheck-in: All visitors shall register at the main security gate prior to site entry.Identification: Photo ID or passport is required at security control, matching the details submitted at registration.Mandatory PPE: Safety helmet, high-visibility vest and steel-toe safety boots are required for all visitors entering operational areas. Attendees shall provide their own PPE; access to operational areas will be refused without it.All attendees shall comply with the site safety rules of the plant operator and with the requirements referred to in Appendix 3-E [Health and Safety for Site Works].All costs associated with attending the Site inspection are borne by the offeror. Statements made during the Site inspection do not amend the RFP

New clarification added: Clarification request no. 1We are seeking clarification regarding the application of Qualification Criterion 3 in Section II: Evaluation Method and Criteria, which states:"The offeror has been in continuous business in the infrastructure and infrastructure design sector during the last 10 years."We note that Qualification Criteria 1, 2, and 4 each include an explicit sub-clause specifying how the requirement applies to Joint Venture (JV) proposals:Criterion 1 (current ratio): "JV application: The requirement must be met by all JV partners separately."Criterion 2 (annual turnover): "JV application: May be met cumulatively across all partners."Criterion 4 (registration in Kosovo): "JV application: At least one partner... must hold this registration."Criterion 3, however, contains no corresponding JV application clause.Could UNOPS please confirm how Criterion 3 is to be applied where a proposal is submitted by a Joint Venture in which one partner has more than 10 years of continuous business experience in the infrastructure/infrastructure design sector, while another partner has been incorporated and operating for a shorter period (e.g., 7 years)?Specifically, we would appreciate confirmation on whether:(a) it is sufficient for at least one JV partner to individually meet the 10-year requirement (consistent with the treatment of Criterion 4); or(b) each JV partner must individually satisfy the 10-year requirement (consistent with the treatment of Criterion 1); or(c) the requirement may be assessed on a combined/cumulative basis across the JV as a whole.We would be grateful for written clarification prior to the proposal submission deadline, so that we may finalize our consortium structure accordingly.Clarification response no. 1:(a) Response to Query 1 - Confirmed (Yes):It is sufficient for at least one partner in the Joint Venture (JV) to independently meet the requirement of being in continuous business within the infrastructure and infrastructure design sector for the past ten years. Typically, this partner should be the Lead Partner or the JV member responsible for the primary engineering or construction tasks.(b) Response to Query 2 - Incorrect (No):Not every JV partner needs to individually meet the 10-year requirement. According to UNOPS, when each JV partner must separately meet a qualification standard, Section II will clearly state, "JV application: The requirement must be met by all JV partners separately," as noted under Qualification Criterion 1 for Current Ratio. However, Qualification Criterion 3 does not impose this restriction, allowing JV members with a shorter operational history, such as 7 years, to qualify as long as one member individually meets the 10-year requirement.(c) Response to Query 3 - Incorrect (No):Qualification Criterion 3 cannot be evaluated on a combined or cumulative basis. The continuous business duration serves as a measure of corporate stability over time, not as an additive capability. This differs from Qualification Criterion 2 for Annual Turnover, which allows for cumulative fulfillment across all partners. Therefore, combining operating durations from different JV members, such as 7 years from Partner A and 3 years from Partner B, is not valid and will not be accepted.

New clarification added: Clarification request no. 1We are seeking clarification regarding the application of Qualification Criterion 3 in Section II: Evaluation Method and Criteria, which states:"The offeror has been in continuous business in the infrastructure and infrastructure design sector during the last 10 years."We note that Qualification Criteria 1, 2, and 4 each include an explicit sub-clause specifying how the requirement applies to Joint Venture (JV) proposals:Criterion 1 (current ratio): "JV application: The requirement must be met by all JV partners separately."Criterion 2 (annual turnover): "JV application: May be met cumulatively across all partners."Criterion 4 (registration in Kosovo): "JV application: At least one partner... must hold this registration."Criterion 3, however, contains no corresponding JV application clause.Could UNOPS please confirm how Criterion 3 is to be applied where a proposal is submitted by a Joint Venture in which one partner has more than 10 years of continuous business experience in the infrastructure/infrastructure design sector, while another partner has been incorporated and operating for a shorter period (e.g., 7 years)?Specifically, we would appreciate confirmation on whether:(a) it is sufficient for at least one JV partner to individually meet the 10-year requirement (consistent with the treatment of Criterion 4); or(b) each JV partner must individually satisfy the 10-year requirement (consistent with the treatment of Criterion 1); or(c) the requirement may be assessed on a combined/cumulative basis across the JV as a whole.We would be grateful for written clarification prior to the proposal submission deadline, so that we may finalize our consortium structure accordingly.Clarification response no. 1:(a) Response to Query 1 - Confirmed (Yes):It is sufficient for at least one partner in the Joint Venture (JV) to independently meet the requirement of being in continuous business within the infrastructure and infrastructure design sector for the past ten years. Typically, this partner should be the Lead Partner or the JV member responsible for the primary engineering or construction tasks.(b) Response to Query 2 - Incorrect (No):Not every JV partner needs to individually meet the 10-year requirement. According to UNOPS, when each JV partner must separately meet a qualification standard, Section II will clearly state, "JV application: The requirement must be met by all JV partners separately," as noted under Qualification Criterion 1 for Current Ratio. However, Qualification Criterion 3 does not impose this restriction, allowing JV members with a shorter operational history, such as 7 years, to qualify as long as one member individually meets the 10-year requirement.(c) Response to Query 3 - Incorrect (No):Qualification Criterion 3 cannot be evaluated on a combined or cumulative basis. The continuous business duration serves as a measure of corporate stability over time, not as an additive capability. This differs from Qualification Criterion 2 for Annual Turnover, which allows for cumulative fulfillment across all partners. Therefore, combining operating durations from different JV members, such as 7 years from Partner A and 3 years from Partner B, is not valid and will not be accepted.