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 no. 257: Sub-Clause 14.15 – Currencies of PaymentPlease confirm and specify in the Schedule of Details that the Contract Price and all payments under the Contract shall be stated and paid exclusively in euros (EUR), without any currency conversion or exchange-rate risk for the Contractor.Response to question no. 257:The Contract Price and all payments under the Contract will be stated and paid in Euro (EUR), as stated in previous clarifications, and this will be specified in Schedule 1 [Schedule of Details] under Sub-Clause 14.15. Any exchange-rate risk relating to the Contractor's own costs incurred in other currencies is borne by the Contractor.

New clarification added: Question no. 245:Sub-Clause 14.2 – Advance PaymentPlease clarify whether an advance payment is provided under the Contract. If so, please specify the amount or percentage of the Contract Price, the payment conditions, the repayment schedule and the required form and validity period of the Advance Payment Guarantee in the Schedule of Contract Price. If no advance payment is provided, please expressly confirm that Sub-Clause 14.2 shall not apply.Response to question no. 245:No advance payment is provided under the Contract.

New clarification added: Question no. 244:Sub-Clause 14.1 – The Contract PricePlease confirm that the Contract Price is a lump-sum price solely for the scope of Works expressly defined in the Contract and reasonably ascertainable from the tender documents as at the Base Date. The quantities, unit rates and other price data stated in the Schedule of Contract Price shall be used only for the allocation of the Contract Price, valuation of progress payments and Variations, and shall not result in remeasurement of the original scope of Works.Any additional or changed work arising from amendments, omissions, inconsistencies or inaccuracies in the Employer’s Requirements or Site Data, or from circumstances that could not reasonably have been identified before tender submission, shall be treated as a Variation. The Contract Price shall remain subject to all adjustments permitted under the Contract, including Variations, Changes in Law and Changes in Cost.Response to question no. 244:Contract Price and quantities. The Contract Price is the total of the prices in the Price Schedule, offered to complete the Works on a single responsibility basis (Price Schedule, Preamble 2.0). The Contractor is deemed to have ascertained the quantities before submitting its Proposal (Preamble 4.0), and the cost of any omitted activity is deemed to be included in the other prices (Preamble 2.0). In accordance with Sub-Clause 14.1(a)(iii) and (iv), quantities and price data in a Schedule are used only for the purposes stated in that Schedule. Sub-Clause 4.11 [Sufficiency of the Contract Price] applies.Additional or changed work. Not accepted. A Variation arises only where it is instructed or approved by the Employer’s Representative under Clause 13 [Variations and Adjustments]. Responsibility for the Employer’s Requirements and Site Data is as set out in Sub-Clause 5.1(a) (as replaced by the Particular Conditions), Sub-Clause 4.10 [Site Data] and Sub-Clause 4.12 (as replaced by the Particular Conditions).Adjustments. The Contract Price is subject only to the adjustments expressly provided for in the Contract. In accordance with Sub-Clauses 13.7 and 13.8, the Contract Price shall not be adjusted for changes in Law or for changes in cost.

New clarification added: Question no. 243:Sub-Clause 13.8 – Adjustments for Changes in Cost(a) The Contract Price shall be subject to adjustment for increases or decreases in the cost of labour, materials, Plant, equipment, transport, fuel, energy and other inputs to the Works occurring after the Base Date. (The Pre-Bid Meeting Minutes refer to the Base Date as day 42 of the procurement procedure, which appears to be 28 September 2026. However, “Base Date” is not defined in the Conditions of Contract. Please confirm that the Base Date is 28 September 2026 and include this definition in the Contract.) (b) The adjustment shall be calculated separately for each monthly Statement by applying the relevant indices for the month in which the respective Works were executed, compared with the corresponding indices applicable on the Base Date.(c) Where the calculation for an individual monthly Statement demonstrates an increase of more than five percent (5%), the Contractor shall be entitled to an adjustment of that monthly Statement reflecting the full demonstrated increase.(d) The Contractor may claim the adjustment either together with the relevant monthly Statement or cumulatively, for each monthly Statement separately, before submission of the Final Statement. Failure to claim an adjustment in the relevant monthly Statement shall not constitute a waiver of the Contractor’s entitlement to claim it in the Final Statement.(e) The calculation shall be based on relevant official indices published by Eurostat or, where no appropriate Eurostat index is available, another internationally recognised published index appropriate to the nature and country of origin of the relevant input.(f) The applicable indices and weightings shall be agreed and incorporated into the Contract before the Date of the Contract. The adjustment shall be calculated using the standard price-adjustment formula set out in Sub-Clause 13.8 of the FIDIC Conditions of Contract for Plant and Design-Build, First Edition 1999 (Yellow Book).(g) No adjustment shall apply to the extent that the relevant increase results from delay attributable to the Contractor or has already been compensated through the valuation of a Variation.(h) Where the calculation for an individual monthly Statement demonstrates a decrease of more than five percent (5%), a corresponding adjustment shall apply to that monthly Statement on the same basis.Response to question no. 243:Please refer to the base date stated in Amendment 4Price adjustment (paragraphs (a) to (h)) : Not accepted. Sub-Clause 13.8 [Adjustments for Changes in Cost] remains unchanged. 

New clarification added: Question no. 240:Sub-Clause 13.5 – Provisional SumsPlease specify in the Schedule of Details, before tender submission, the percentage applicable to the Contractor’s overheads and profit for Provisional Sum items. Please also confirm that work executed by the Contractor under Sub-Clause 13.5(a)(i) shall be valued under Sub-Clause 13.3, including reasonable overheads and profit.Response to question no. 240Please be informed that there are no specific percentages defined.

New clarification added: Question no. 204:Sub-Clause 5.4 – As-Built DocumentsPlease amend Sub-Clause 5.4 so that preliminary as-built documents are submitted before the Tests on Completion, while the final as-built documents, incorporating any modifications made during testing and commissioning, are submitted before Taking Over.Taking Over shall not be delayed due to minor documentary omissions that do not affect the safe operation or maintenance of the Works.Response to question no. 204:Please adhere to the terms outlined in the contract.

New clarification added: Question no. 205:Retention and Performance SecurityThe published clarifications confirm that the 5% Performance Security will not be reduced following Taking Over and will remain in full force until expiry of the applicable DNP.Considering that the individual WWTPs and the Chemical Storage Building may be completed and Taken Over as separate Sections at different times, maintaining the full Performance Security together with the remaining Retention Money after Taking Over creates disproportionate cumulative security.Please amend the Contract so that:50% of the Retention Money attributable to each Section is released upon Taking Over of that Section and the remaining 50% upon expiry of its respective DNP; andthe Performance Security is reduced proportionally to the value of each Section upon its Taking Over.Security relating to a completed and Taken Over Section should not remain outstanding solely because another Section has not yet been completed.Response to question no. 205:Please refer to Amendment 4. 

New amendment added #5: Please be advised of the following amendments / updates to the tender documents:1. Annex A – Terms of Reference (Update 3), Section 3.2, Value Engineering Alternative.2. Section IV – Returnable Schedules (Update 3): Form 3.0 [Performance Security Form], the currency for the performance guarantee has been specified as "Euro".3. Section II – Evaluation Method and Criteria is updated.4. Section III - Conditions of Contract, Section 8, Table of Workplan: Note added to clarify flexibility in the proposed timelines under items 1 and 2.Please note that the removed requirements are marked with strikethrough, while the newly added requirements / details have been marked in red.UNOPS advises to remain up to date with the published amendment.

New clarification added: Question:Sub-Clause 6.5 – Working HoursPlease specify the permitted working hours and all applicable rates for additional supervision before the Tender submission deadline.Additional supervision Costs shall not be charged to the Contractor where extended or non-standard working hours result from access restrictions, shutdown requirements, Employer instructions or delays not attributable to the Contractor.Answer:Working hours. As stated in Schedule 1 [Schedule of Details] (Sub-Clause 6.5), the duration of work is 8 hours per day, 6 working days per week, Monday to Saturday. Access to the Site may be restricted on Sundays, national holidays and official UN holidays. Work outside these hours is subject to Sub-Clause 6.5(a). The working hours should not be in conflict with local legislation. Rates for additional supervision.  In accordance with Sub-Clause 6.5(b), the Costs of additional supervision by the Employer’s Personnel will be agreed or determined by the Employer’s Representative under Sub-Clause 3.5 [Determinations].

New clarification added: Question: Sub-Clause 14.9 – Payment of Retention MoneyPlease amend Sub-Clause 14.9 so that Retention Money is released separately and proportionately for each Section: fifty percent (50%) upon issuance of the Taking Over Certificate for the relevant Section and the remaining fifty percent (50%) upon expiry of its respective Defects Notification Period. Any withholding for outstanding work or defects shall be limited to the reasonable estimated cost of that specific work.Answer:Not accepted. Please refer to the response to the previous query on Retention and Performance Security. Sub-Clause 14.9 remains unchanged.

New clarification added: Question:Could the Employer please clarify the official deadline and expected turnaround time for issuing and publishing responses to tenderers' clarification requests? Specifically:What is the mandatory maximum timeframe (number of business days) within which the Employer will provide formal answers following the submission of clarification queries? When will the Bidders (at latest) receive all answers, before the final submission deadline?Will the Employer confirm that all clarification responses will be published with sufficient advance notice before the tender closing date to allow tenderers adequate time to integrate the answers into their technical and commercial proposals?Response:1. Maximum timeframe for responding to clarification requestsThere is no fixed number of business days established for responding to individual clarification requests. UNOPS endeavours to respond as promptly as possible.However, certain clarification requests, particularly those involving contractual provisions, require interpretation, consultation, and approval from the UNOPS Legal Group at Headquarters. Such internal reviews may require additional time before an official response can be issued.2. Deadline for publishing clarification responsesThe deadline for submitting clarification requests was 14 October 2026 (COB), while the final tender submission deadline remains 26 November 2026.UNOPS will make every effort to publish all outstanding clarification responses sufficiently in advance of the tender submission deadline. All formal responses will be published through the UNOPS eSourcing system and made equally available to all tenderers.3. Sufficient time for incorporating clarifications into proposalsUNOPS recognizes the importance of providing tenderers with sufficient time to incorporate clarification responses into their technical and financial proposals.Should any clarification result in a material change to the tender requirements, UNOPS will assess the need for an amendment and/or extension of the submission deadline in accordance with applicable procurement procedures.

New clarification added: Question: Requiring ISO certificates to have at least 12 months of remaining validity at the time of tender submission is discriminatory against long-standing certified companies whose standard 3-year recertification or annual audit cycle falls within the upcoming 12 months.Will the Employer please amend the qualification criteria to state that ISO certificates must simply be valid at the date of tender submission, provided the tenderer submits a written declaration committing to maintain valid certification throughout contract execution?Answer:Amendment of the requirement. Not required. The tender documents do not require a minimum remaining validity period for ISO certificates. Criterion 1.2 of Section II: Evaluation Method and Criteria requires ISO 9001, ISO 14001 and ISO 45001 certifications held by the lead member of the JV for at least one (1) year and valid at the date of proposal submission. This is a scored technical criterion (2 points), not a qualification requirement. A certificate that meets these conditions will be accepted irrespective of its expiry date.Renewal written declaration. Not applicable. A certificate expiring within 12 months after submission meets Criterion 1.2, provided it has been held for at least one year and is valid at the date of proposal submission. No written declaration is required for evaluation purposes."

New clarification added: Question:Please provide the water level as well as sole depth relative to the surface at the following manholes as part of the existing sewage networks (numbers according to Figure 2-1, V3_Technical specification):Manhole 11 of the sludge networkManhole at the inflow to the existing ash settling tank at the location of WWTP A (not numbered)Manhole 520 of the sewage networkManhole 169 of the rainwater and chemically neutral wastewater networkIn addition, please confirm whether Manhole 169 is the last manhole in the rainwater network before the wastewater discharge point. If there is a downstream manhole between Manhole 169 and the discharge point, we would kindly ask for the water level and sole depth at this point as well.Answer:Based on the available topographic survey data, please find below the requested information:Manhole 11 – Sludge Network: The manhole is currently covered by the ESP-x Contractor's works. Therefore, the requested measurements are not available at this stage.Manhole at WWTP-A – Existing Ash Settling Tank Inlet: The measured invert elevation of the second manhole upstream of the inlet is H = 572.48 m ASL, with a manhole depth of 2.55 m.Manhole 520 – Sewage Network: The measured invert elevation is H = 572.39 m ASL, with a manhole depth of 2.65 m.Manhole 169 – Rainwater and Chemically Neutral Wastewater Network: The measured invert elevation is H = 571.78 m ASL, with a manhole depth of 2.75 m.Downstream Connection: Manhole 169 is not the last manhole before the wastewater discharge point. There are two additional downstream manholes. The final manhole before discharge has an invert elevation of H = 571.25 m ASL and a depth of 3.05 m.Water Levels: Based on the available information, the filling ratio (h/d) in the existing wastewater networks ranges between 0.30 and 0.65. Exact water levels at individual manholes have not been established.The above information is provided based on the available survey data. The Contractor shall verify the actual invert elevations, water levels, network conditions, and hydraulic characteristics during the detailed design phase, in accordance with the Employer's Requirements.

New clarification added: Question:Our Company is interested in participating in RFP/2026/63431 – Design and Build of Five Wastewater Treatment Plants and One Chemical Storage Facility at Kosovo B.We would like to highlight our experience in water treatment plant construction and dam infrastructure. We also have an office in Kosovo and would welcome the opportunity to bring our experience to this project. We can provide supporting information on our relevant project experience upon request.Having reviewed the published clarifications, we understand that attendance at a site visit remains mandatory. With the submission deadline extended to 26 November 2026, we respectfully request an additional site visit, open to all interested bidders on equal terms.Please confirm:Whether another site visit can be arranged and what registration documents are required.Whether attendance at that visit would satisfy the eligibility requirement for bidders who did not attend the earlier visits.If another visit is not possible, whether UNOPS would consider a formal amendment allowing an alternative means of satisfying this requirement.Whether bidders attending an additional visit would have an opportunity to submit follow-up clarification questions.We are keen to participate in this opportunity and would appreciate your consideration and prompt response.Answer:Additional Site Visit: UNOPS has already organized two mandatory site visits, held on 31 August and 25 September 2026. No additional site visit is planned.Eligibility Requirement: Attendance at either of the two previously organized mandatory site visits satisfies the RFP requirement. Attendance remains mandatory.Alternative Arrangements: UNOPS does not intend to amend or waive the mandatory site-visit requirement or introduce alternative arrangements.Clarification Questions: The deadline for submitting clarification questions was 14 October 2026, by close of business (COB). No further clarification questions will be accepted after this deadline.

New clarification added: Question:Clause 23 – Particular Conditions Please delete the internal drafting note and issue the complete Particular Conditions, together with all completed Schedules, before tender submission. All project-specific amendments, additional obligations, interface risks, third-party risks, payment provisions and other risk allocations must be disclosed equally to all tenderers and incorporated into the tender documents. No material additional risk or obligation should be imposed on the selected Contractor after tender submission.Answer:The Particular Conditions and Schedules 1 to 17, completed with the Employer’s details, were issued in Section III – Conditions of Contract (Update 1) by Amendment 4. In accordance with Section I, Article 33 [Signing of Contract], the successful Offeror will be invited to sign the final version of the Contract provided in the proposal documents, incorporating all agreements between the Parties.

New clarification added: Question:Sub-Clause 14.12 – DischargePlease provide the required form of discharge before tender submission. The discharge shall exclude all disputed, pending and expressly reserved Claims and shall become effective only after the Contractor has received the full amount due under the Final Payment Certificate and all outstanding securities and Retention Money have been released.Response:Will be prorvided later. at the end of contract. Not relevant now to the proposal 

New clarification added: Question:Sub-Clause 14.5 – Plant and Materials Intended for the Worksthe Employer is requested to provide a complete and binding list before tender submission to ensure that the same payment conditions apply equally to all tenderers. All listed Plant and Materials shall be eligible for payment of eighty percent (80%) of their substantiated value in accordance with Sub-Clause 14.5.Answer:The Employer does not accept this request. Schedule 7 [Schedule of Payments], item 5, includes no list of Plant and Materials, so Sub-Clause 14.5 [Plant and Materials intended for the Works] does not apply. No payment will be made for Plant and Materials delivered to Site or shipped before they are incorporated into the Works.Payment will be made only against the milestones in Schedule 7, once the Employer’s Representative has certified them. This applies equally to all offerors, which meets your request for equal treatment.

New clarification added: Question:Sub-Clause 14.4 – Instalment Payment EstimatesPlease confirm that payments shall be based on the actual monthly progress of the Works. Sub-Clause 14.5 shall remain applicable to eligible Plant and Materials notwithstanding any instalment or milestone payment schedule. Any revision of instalment amounts shall reflect both lower and higher actual progress.Answer:14.4 – Instalment Payment Estimates. Payments are made against the milestones in Schedule 7, not against monthly progress. As stated in Schedule 7, Section 5, no lists of Plant and Materials are included, and Sub-Clause 14.5 therefore does not apply.

New clarification added: Question:Sub-Clause 14.3 – Application for Interim Payment CertificatesPlease complete the Schedule of Payments before tender submission and confirm that the Contractor may submit monthly Statements for the value of Works and Contractor’s Documents actually completed during each month. Payments shall be based on the percentage completion of the relevant activities and shall not be deferred until completion of an entire WWTP or other major milestone. The applicable retention shall be limited to five percent (5%), as clarified by the Employer.Answer:Payments shall be made against the milestones set out in Schedule 7 [Schedule of Payments], upon certification by the Employer’s Representative, as also stated in Annex A [ToR], Section 5.6. Payment by percentage completion of activities is not provided for. Retention is 5% of each payment, as stated in Schedule 1 [Schedule of Details].

New clarification added: Question:Sub-Clause 4.26 – Auxiliary WorksSchedule 15 – Schedule of Auxiliary Works is currently blank. Please provide a completed Schedule identifying the scope, responsible parties, interface requirements and completion dates of all Auxiliary Works before the Tender submission deadline.The Contractor shall be entitled to an extension of time and reimbursement of Costs where the Auxiliary Works are delayed, defective or inconsistent with the information provided at tender stage.Answer:Schedule 15. Schedule 15 [Schedule of Auxiliary Works] was completed in Section III (Update 1), issued by Amendment 4. The Auxiliary Works are the geodetic and topographical survey and the ESIA, carried out under separate contracts with the Employer. As stated in Amendment 4, the preliminary survey drawings are for information only, and Offerors remain responsible for site verification. The final survey and ESIA will be provided to the selected Contractor.Contractor’s obligations. In accordance with Sub-Clause 4.26(c), the Contractor shall co-operate with the parties performing the Auxiliary Works and remains fully responsible for its obligations under the Contract. Site Data shall be verified by the Contractor in accordance with Sub-Clause 4.10.Extension of time and Costs. Not accepted. Sub-Clause 4.26 remains unchanged. Any claim shall be made under Sub-Clauses 8.4 and 20.1, as stated in Sub-Clause 4.26(b). 

New clarification added: Question:Sub-Clause 4.15 – Access RoutePlease confirm that the Employer will ensure continuous access to the Site through the existing access routes and security procedures. Any restriction or unavailability of access for reasons outside the Contractor’s control shall entitle the Contractor to an extension of time and reimbursement of Costs.The Contractor shall only be responsible for repairing damage to access routes directly caused by its personnel, vehicles or operations, taking account of their documented pre-existing condition.Answer:The Employer confirms that access to the Site shall be provided in accordance with Sub-Clause 2.1 [Right of Access to the Site] and the applicable security and operational procedures at TPP Kosovo B.As explained during the mandatory site visits, TPP Kosovo B is an operational power plant, and other contractors are currently carrying out works within the Site. Accordingly, access may be subject to security checks, traffic restrictions, and temporary delays at entry and exit points. Tenderers shall take these conditions into consideration when preparing their proposals and construction programmes.KEK has indicated that an alternative access road will be provided. However, UNOPS cannot guarantee that this road will be completed or available before commencement of the Works, as its implementation is under KEK's responsibility.The Contractor shall plan and coordinate its activities accordingly, including access arrangements, transportation of equipment, and movement of personnel.Any restrictions or delays affecting Site access shall be assessed in accordance with the applicable Conditions of Contract. Entitlement to an Extension of Time or additional Costs shall not be automatic.The Contractor shall remain responsible for the proper use of access routes and for rectifying damage caused by its operations, in accordance with Sub-Clause 4.15.

New clarification added: Question:Sub-Clauses 1.16 and 1.17 – Required Licences and RegistrationsThe Tenderer notes that the tender may also be submitted by companies established outside Kosovo, which will commence the process of obtaining the required local registrations and licences following the final contract award decision.The Employer is therefore requested to verify whether all required registrations and licences can legally and practically be obtained by a foreign contractor before the Date of the Contract.Please confirm that such registrations and licences must be obtained before commencement of the relevant licensed activity, rather than by the Date of the Contract, and that sufficient time will be allowed for their acquisition.Answer:Verification of feasibility. UNOPS does not verify or advise on whether a foreign contractor can obtain registrations and licences under the Laws of Kosovo, or how long that takes. Offerors are responsible for informing themselves of these requirements, which form part of the Site Conditions as defined in Sub-Clause 1.1 (paragraph (d): “the Laws, procedures and labour practices of the Country”).Company registration. As stated in Section II: Evaluation Method and Criteria, Qualification Criterion 4, the offeror shall be legally registered in Kosovo as a contractor or designer. For Joint Ventures, at least one partner performing works or design services in Kosovo shall hold this registration at the time of contract signing.Timing. Sub-Clauses 1.16 and 1.17 remain unchanged.Under Sub-Clause 1.16(b)(ii), the Contractor warrants that it has obtained all licences, permissions and consents required at the Date of the Contract.Under Sub-Clauses 1.13(c) and 1.17, the Contractor shall at its cost be, and ensure that its personnel are, registered and licensed as required by the applicable Laws at all times during the performance of the Works.Licensing of Key Personnel shall be in accordance with Annex A [ToR], Key Personnel – Statutory Licensing & Professional Qualification Recognition Note.No additional time will be allowed for obtaining registrations and licences. Any claim for extension of time shall be assessed solely in accordance with the Conditions of Contract.

New clarification added: Question:Please elaborate, explain in detail the option for VALUE ENGINEERING ALTERNATIVE – as mentioned in tender documents. How will it be valuated? How should tenderers propose it financially? ...Response:Alternative technical solutions / variant offers. Not permitted. In accordance with the Particulars (“Alternative proposal: Not accepted”) and Section I, Article 16 [Alternative Proposals], alternative technical solutions, variant offers and Value Engineering Alternatives will not be received or evaluated at tender stage. Proposals shall be fully compliant with Annex A [ToR] and the Employer’s Requirements, including the specified Best Available Techniques (BAT).Base tender. Each Offeror shall submit a single, fully compliant Proposal for the complete scope. Evaluation and award will be based solely on that Proposal, in accordance with Section II: Evaluation Method and Criteria.Pricing. No separate Price Schedule, Financial Proposal or price addition/deduction shall be submitted for any alternative solution. The Financial Proposal shall be submitted only in Schedules 2.1A and 2.1B for the full scope.Value Engineering after award. After Contract award, the Contractor may submit Value Engineering proposals in accordance with Sub-Clause 13.2 [Value Engineering] of the Conditions of Contract. Any proposal approved by the Employer will be treated as a Variation and implemented in accordance with Sub-Clause 13.3 [Variation Procedure]. The Employer has no obligation to accept any Value Engineering proposal.

New clarification added: Question:Could the Employer please clarify the following regarding alternative technical solutions and variant offers: Are tenderers permitted to submit alternative technical solutions or variant offers for the Wastewater Treatment Plants or the Chemical Storage facility? If alternative technical solutions are permitted, is it mandatory for the tenderer to submit a fully compliant base tender as a prerequisite for the evaluation of the alternative offer? How should the financial/pricing part for an alternative technical solution be submitted? Specifically: Should it be provided as a completely separate, standalone Price Schedule / Financial Proposal envelope? Or Should it be presented as an itemized cost addition/deduction relative to the base tender price?Answer:Alternative technical solutions / variant offers. Not permitted. In accordance with the Particulars (“Alternative proposal: Not accepted”) and Section I, Article 16 [Alternative Proposals], alternative technical solutions, variant offers and Value Engineering Alternatives will not be received or evaluated at tender stage. Proposals shall be fully compliant with Annex A [ToR] and the Employer’s Requirements, including the specified Best Available Techniques (BAT).Base tender. Each Offeror shall submit a single, fully compliant Proposal for the complete scope. Evaluation and award will be based solely on that Proposal, in accordance with Section II: Evaluation Method and Criteria.Pricing. No separate Price Schedule, Financial Proposal or price addition/deduction shall be submitted for any alternative solution. The Financial Proposal shall be submitted only in Schedules 2.1A and 2.1B for the full scope.Value Engineering after award. After Contract award, the Contractor may submit Value Engineering proposals in accordance with Sub-Clause 13.2 [Value Engineering] of the Conditions of Contract. Any proposal approved by the Employer will be treated as a Variation and implemented in accordance with Sub-Clause 13.3 [Variation Procedure]. The Employer has no obligation to accept any Value Engineering proposal.

New clarification added: Question:7. Adjustments for Changes in Cost / Price EscalationSub-Clause 13.8 currently provides that the Contract Price is not subject to adjustment for changes in the cost of labour, Goods and other inputs.Considering the anticipated duration of the Contract and the potential volatility of construction materials, equipment and other relevant inputs, please confirm whether the Employer would consider making Sub-Clause 13.8 applicable, or introducing an appropriate contractual price-adjustment mechanism for material changes in cost during execution of the Works.Requested by: Nikolina Hreščan (nikolina.hrescan@strabag.com)Answer:The Employer does not accept this request. This is a fixed-price, lump-sum contract (Schedule 6). Sub-Clause 13.8 and Schedule 6, item 4 [Adjustments for Changes in Cost] stay as issued: the Contract Price will not be adjusted for rises or falls in the cost of labour, Goods or other inputs to the Works. Under Section I, Article 18, prices must be fixed, and a proposal with adjustable prices will be rejected.The Contract Price may only be adjusted under the provisions of the Conditions of Contract, mainly Variations (Sub-Clauses 13.1–13.3) and Daywork (Sub-Clause 13.6). Offerors should allow for expected cost changes over the Contract period in their prices. 

New clarification added: Question : Question: Urgent Request:To enable tenderers to accurately assess commercial risks and progress with their technical and financial proposals, the Employer is urgently requested to:Immediately publish formal responses to all submitted clarification requests concerning the draft Contract and Particular Conditions of Contract; andExtend the deadline for submitting clarification requests to allow tenderers sufficient time to review the Employer's contractual clarifications and submit any necessary follow-up queries (replies).Answer : 1. Publication of Contractual ClarificationsUNOPS acknowledges the importance of providing timely responses to clarification requests concerning the draft Contract and the Particular Conditions of Contract.UNOPS has received an exceptionally high number of clarification requests, many of which require lengthy legal and technical review. Several of these requests require detailed review, interpretation and approval by the UNOPS Legal Team and Engineering Team, to ensure that responses are accurate, consistent with the contractual provisions and formally approved.UNOPS is making every effort to finalise and publish the outstanding responses as soon as possible. All formal clarifications will be published through the UNOPS eSourcing system and made equally available to all tenderers.2. Clarification DeadlineThe deadline for submitting clarification requests was 14 October 2026 (COB), and the tender submission deadline remains 26 November 2026.UNOPS will respond as soon as possible to all clarification requests received by the established deadline, taking into account the time required for technical and legal reviews and approvals. 

New clarification added: Question : Sub-Clause 4.13 – Rights of Way and Facilities. Please confirm that the Employer shall provide the Contractor with the normal right of access to the Site under Sub-Clause 2.1, while the Contractor shall only bear the cost of any special or temporary access routes required for its own execution methods. Before engaging others under Sub-Clause 4.13(b), the Employer shall grant the Contractor a reasonable period to remedy the default. Any recoverable Costs and delay damages shall not result in double recovery and shall be subject to the agreed overall liability limits.Answer : Not accepted. Sub-Clause 4.13 remains unchanged. Right of access to the Site is given in accordance with Sub-Clause 2.1, the Schedule of Site Plan and the Schedule of Details, subject to the phasing and site restrictions in Annex A [Terms of Reference], Section 3.3. The Contractor bears the costs of special and temporary rights-of-way under Sub-Clause 4.13(a). Sub-Clause 4.13(b) applies only after written notification of the default by the Employer. The Delay Damages under Sub-Clause 4.13 will be as stated in the Schedule of Details (please refer to the response to Clarification Request 30 [Schedule of Details]). In accordance with Section I: Instructions to Offerors, Article 7, offerors shall be willing to sign Section III: Conditions of Contract without departure, qualification, amendment, limitation or exclusion. Proposals containing reservations or qualifications to the Conditions of Contract may be considered materially non-compliant under Article 27.Question : Base Date. The Pre-Bid Meeting Minutes refer to the Base Date as day 42 of the procurement procedure, which appears to be 28 September 2026. However, “Base Date” is not defined in the Conditions of Contract. Please confirm that the Base Date is 28 September 2026 and include this definition in the Contract.Answer : Base Date. Not confirmed. The Base Date is Thursday, 29 October 2026, being 28 days before the deadline for submission of proposals, as stated in Amendment 4. Amendment 4 prevails over any earlier RFP document, amendment, clarification or meeting minutes, including the Pre-Bid Meeting Minutes. In accordance with Section I, Article 9, offerors shall not rely on any statement made at the clarification meeting unless confirmed by UNOPS in writing.Question : Sub-Clause 4.18 – Protection of the Environment Please confirm that the Contractor shall not be responsible for pre-existing contamination or for pollution, emissions, discharges or environmental damage caused by the Employer, the operator of the Site or other third parties. The Contractor’s indemnity shall apply only to the extent directly caused by its negligent act, omission or breach of the Contract and shall remain subject to the aggregate limitation of liability. The existing environmental condition of the Site should be jointly recorded before commencement of the Works.Answer : The Employer confirms that TPP Kosovo B is an existing operational power plant and that the Project aims to address existing wastewater streams and improve environmental compliance.Pre-existing contamination, pollution, emissions, and discharges associated with KEK's operations or other third parties shall be distinguished from environmental impacts arising from the Contractor's activities. However, the Contractor remains responsible for managing existing environmental conditions where required under the Employer's Requirements and the scope of Works.Environmental protection obligations are already addressed under Sub-Clause 4.18 [Protection of the Environment], Schedule 17 [Schedule of Environmental Requirements], and Annex III [UNOPS HSSEQ Management Manual and Standard Operating Procedures].The existing environmental conditions may be jointly inspected and documented by UNOPS, KEK, and the Contractor before commencement of the Works.The Contractor's indemnity obligations and applicable liability limitations shall remain governed by the Conditions of Contract. The requested limitation of indemnity solely to negligent acts is not accepted.Sub-Clause 4.18 remains unchanged.Question : Sub-Clause 4.22 – Security of the Site Please amend Sub-Clause 4.22 to clarify that the Employer and the Site operator remain responsible for general Site security, access control and the security of their personnel and property. The Contractor shall only be responsible for security within its designated work areas and for its own personnel, Equipment, Plant and Materials, to the extent under its control.Answer : The Employer confirms that Sub-Clause 4.22 [Security of the Site] shall be read together with Schedule 2 [Schedule of Site Plan] of Section III – Conditions of Contract (Update 1), issued under Amendment 4.As TPP Kosovo B is an operational power plant, general Site security and access control outside the Contractor's designated working areas remain under KEK's responsibility. The Contractor shall comply with KEK's security and operational procedures.The Contractor shall be responsible for providing and maintaining security within its designated working and construction areas, including site offices, warehouses, storage facilities, workshops, laydown areas, equipment, Plant, Materials, and other property under its control.In accordance with Section IV – Price Schedule, Schedule 2.1B-1 [Preliminaries & General Attendances], particularly Items 1.2 [Temporary Accommodation] and 1.3.7 [Security Personnel Facilities], the Contractor shall provide the necessary temporary facilities and security arrangements as part of its mobilisation and site establishment obligations.The Contractor shall not be responsible for general security outside its designated working areas, except in relation to its own personnel, equipment, materials, and activities, as required under the Contract.Temporary working, laydown, and parking areas shall be allocated by KEK in coordination with UNOPS before mobilisation.Sub-Clause 4.22 remains unchanged.Question  : Sub-Clause 4.26 – Auxiliary Works Schedule 15 – Schedule of Auxiliary Works is currently blank. Please provide a completed Schedule identifying the scope, responsible parties, interface requirements and completion dates of all Auxiliary Works before the Tender submission deadline. The Contractor shall be entitled to an extension of time and reimbursement of Costs where the Auxiliary Works are delayed, defective or inconsistent with the information provided at tender stage.Question : Sub-Clause 4.29 – Unexploded Ordnance Please confirm that the Employer shall arrange and bear the cost of the investigation, removal and disposal of any unexploded ordnance or land mines by appropriately qualified specialists. The Contractor shall be entitled to an extension of time and reimbursement of all resulting Costs, unless the presence of such items was caused by the Contractor. Only the affected area of the Works should be suspended where it is safe to continue elsewhere.Answer : Contratcor will not be rsponsbsile for removal of orinances. Sub-Clause 4.29 [Unexploded Ordinances] remains unchanged. On discovering unexploded ordnance or a land mine, the Contractor shall immediately stop work, notify the Employer’s Representative, take all necessary steps to ensure the safety of all persons and property, and secure the Site. The extent of the stoppage and the resumption of the Works shall be as instructed by the Employer’s Representative. Any entitlement to an extension of time or Costs shall be assessed solely in accordance with the Conditions of Contract.

New clarification added: Question : Following our review of the tender documentation, we respectfully request an extension of the tender submission deadline and clarifications deadline for at least four weeks, as certain requirements require further clarification to ensure a consistent understanding of the scope of works and the obligations to be reflected in the tender. The relevant clarifications may affect the selection of technical solutions, the preparation of cost estimates and the coordination of offers from specialist subcontractors and suppliers. Tenderers therefore require sufficient time not only to review the Contracting Authority’s responses, but also to assess their implications and incorporate any necessary adjustments into their technical and financial submissions.Answer : The tender was extended by Additional 31 days. Question : Sub-Clause 1.18 – Prior Work Sub-Clause 1.18 retroactively applies the Contract, including all warranties and liabilities, to any activities performed before the Date of the Contract and deems them included in the Contract Price. Please amend this provision so that it applies only to prior design, services or works expressly instructed or approved by the Employer and specifically identified in the Contract. Any other pre-contract or tender-stage activities shall not be deemed part of the Works or included in the Contract Price.Answer : Addenda. In accordance with Section I, Article 3 [Amendments to the RFP], all amendments form part of the RFP. Changes made by amendment are incorporated into the revised documents, which supersede all earlier versions. Those revised documents form the Contract in the order of priority stated in the Instrument of Agreement (paragraph 3) and Sub-Clause 1.5 [Priority of Documents].In case of descrepancy between clrification and tender documents and later prevail Clarifications and other information. Not confirmed. Responses to requests for clarification and other information do not form a separate Contract document, and the order of priority in the Instrument of Agreement remains unchanged. In accordance with Section I, Article 33 [Signing of Contract], the final version of the Contract will incorporate all agreements between the Parties. Sub-Clause 1.19 [Entire Agreement] remains unchanged.Question : Sub-Clause 1.25 – Publicity Please confirm that, following completion of the Works, the Contractor may identify the Project and provide factual information on its scope, value and completion as a professional reference, provided that no UNOPS or United Nations name, emblem or official seal is used for advertising purposes. Any required consent shall not be unreasonably withheld or delayed.Answer :Sub-Clause 1.25 [Publicity and Use of the Name, Emblem or official Seal] remains unchanged. Any use of the Project as a professional reference, including factual information on scope, value and completion, requires the prior written permission of UNOPS. Requests will be considered on a case-by-case basis after completion of the Works. Sub-Clause 1.12(b) also applies to photographs.Question : Sub-Clause 4.10 – Site Data The Tenderer must be entitled to rely on the Site Data provided by the Employer when preparing its Tender. It is not reasonable to require the Contractor to verify all such data while excluding any Employer liability, including for inaccurate or incomplete information. Please amend Sub-Clause 4.10 so that the Contractor shall be entitled to an extension of time and reimbursement of Costs arising from any material inaccuracy, omission or deficiency in the Site Data that could not reasonably have been identified during the tender period.Answer : The Employer clarifies that this is a Design and Build Contract, under which the Contractor is responsible for the detailed design, verification of existing site conditions, and execution of the Works.The Site Data, drawings, surveys, and other technical information provided by the Employer are intended to support Tenderers in understanding the existing site conditions and preparing their Technical and Financial Proposals. Such information is provided as reference material and does not relieve the Contractor of its contractual responsibilities.The Contractor shall undertake the necessary site investigations, surveys, measurements, and verification of existing infrastructure and utilities during the detailed design and execution stages, in accordance with the Employer's Requirements.Any entitlement to an Extension of Time or additional Costs arising from inaccuracies or deficiencies in the Site Data shall be assessed in accordance with the applicable Conditions of Contract.Question : Sub-Clause 4.11 – Sufficiency of the Contract Price Please clarify that Sub-Clause 4.11 applies only to the scope and risks reasonably identifiable from the Contract at the Base Date and is without prejudice to the Contractor’s entitlement to Variations, additional payment and extensions of time under the Contract. Please also confirm that work covered by Provisional Sums shall only be performed upon instruction and valued separately in accordance with the Contract.Answer : Scope of Sub-Clause 4.11. Sub-Clause 4.11 [Sufficiency of the Contract Price] remains unchanged and applies as written, including its qualification “unless otherwise stated in the Contract”. Any entitlement to Variations, additional payment or extension of time arises only where the Contract expressly provides for it, under the applicable Sub-Clauses and subject to Sub-Clause 20.1 [Contractor’s Claims]. No further interpretation is provided.Provisional Sums. The Price Schedule does not include any Provisional Sums. Where Provisional Sums apply, they shall be used only in accordance with the Employer’s Representative’s instructions, and the Contract Price adjusted accordingly, as stated in Sub-Clause 13.5 [Provisional Sums].Question : Sub-Clause 4.12 – Unforeseeable Physical Conditions Please confirm that foreseeability shall be assessed on the basis of the information, time and Site access reasonably available to the Contractor before the Base Date, without deeming the Contractor to have carried out investigations that were not reasonably possible. Please amend Sub-Clauses 4.12(d) and 4.12(e) by replacing the 14-day notice period with the customary 28-day period.Answer : The Employer confirms that, in accordance with Sub-Clause 1.1 of the Particular Conditions, “Unforeseeable” means “not reasonably foreseeable by an experienced contractor by the Base Date”.The Base Date is 29 October 2026, as established under Amendment 4.Regarding the requested amendment to the notice periods under Sub-Clauses 4.12(d) and 4.12(e), the Employer clarifies that Sub-Clause 4.12 has already been deleted and replaced in its entirety by the Particular Conditions included in the Tender Documents.

New clarification added: Question : The Tender Documents stipulate that required ISO certificates must have a remaining validity of at least one year (12 months) from the date of tender submission. Under standard international accreditation rules, ISO certificates are issued on a 3-year validity cycle, supported by mandatory annual surveillance audits and periodic recertification. Requiring a minimum of 12 months remaining validity at the exact date of submission creates an artificial barrier and discriminates against long-established contractors who have continuously maintained ISO certifications for decades, but whose regular 3-year recertification or annual audit cycle happens to fall due within the upcoming 12 months. To uphold the principles of equal treatment, non-discrimination, and open competition in public procurement, standard practice requires only that a certificate is valid at the time of submission, accompanied by an undertaking to maintain certification throughout contract execution. To ensure fair competition and non-discriminatory evaluation, will the Employer please: Amend the qualification requirement to confirm that any ISO certificate that is valid at the date of tender submission is fully acceptable, provided the Tenderer submits a formal declaration committing to maintain valid certification throughout the contract duration? Confirm that for certificates expiring within 12 months of submission, tenderers may provide a supporting confirmation/statement in which they declare that they will renew the certification when it expires?Answer : Amendment of the requirement. Not required. The tender documents do not require a minimum remaining validity period for ISO certificates. Criterion 1.2 of Section II: Evaluation Method and Criteria requires ISO 9001, ISO 14001 and ISO 45001 certifications held by the lead member of the JV for at least one (1) year and valid at the date of proposal submission. This is a scored technical criterion (2 points), not a qualification requirement. A certificate that meets these conditions will be accepted irrespective of its expiry date.Renewal declaration. Not applicable. A certificate expiring within 12 months after submission meets Criterion 1.2, provided it has been held for at least one year and is valid at the date of proposal submission. No renewal declaration is required for evaluation purposes.Question : Tenderers have identified a substantial number of critical technical, process engineering, legal, and financial ambiguities—including fundamental parameters regarding influent wastewater characteristics, battery limits, commercial guarantee terms, missing price schedule pages, and qualification criteria. These unresolved issues directly impact the core technological design, process sizing, equipment selection, risk assessment, and financial calculations. Without timely, formal clarifications and addenda from the Employer, tenderers are unable to finalize their technical designs or prepare compliant, competitive, and accurate offers. To ensure equal treatment, technical quality, and full compliance with procurement standards, sufficient time must be granted to integrate the Employer's upcoming responses into the final tender proposals. In light of the fundamental nature of the pending clarification requests and their direct impact on the technological concept, the Employer is urgently requested to: Expedite the issuance of formal answers and any corresponding addenda to all pending tenderer clarification requests; Extend the deadline for submitting further requests for clarification, allowing tenderers to address any new technical requirements arising from the Employer's upcoming responses; and Extend the final Tender Submission Deadline by a reasonable and sufficient period (e.g., at least 3 to 4 weeks following the publication of all complete clarification answers and revised tender documents) to enable all tenderers to prepare robust, fully compliant, and realistic proposals.Answer : Issuance of answers and addenda. UNOPS will respond in writing to the requests for clarification received by the clarification deadline, in accordance with Section I, Article 8 [Clarification of the RFP]. Where any response requires a modification of the RFP, an amendment will be issued in accordance with Section I, Article 3 [Amendments to the RFP].Clarification deadline. Not accepted. The clarification deadline was extended by Amendment 4 to Wednesday, 14 October 2026. In accordance with Section I, Article 8 and Amendment 4, requests received after this deadline will not be answered.Submission deadline. The deadline for proposal submission was extended by Amendment 4 to Thursday, 26 November 2026, 11:00 UTC (12:00 Kosovo time). UNOPS does not foresee a further extension at this stage. In accordance with Section I, Articles 3 and 22, UNOPS may at its discretion extend the deadline by written amendment if a modification of the RFP so requires. Offerors shall proceed on the basis of the current deadline.Question : The Tender Documents require submitted ISO certificates to have a remaining validity period of at least one year (12 months) beyond the tender submission date. Under international accreditation frameworks (such as IAF/ISO rules), management system certificates are issued on a fixed 3-year cycle, maintained through mandatory annual surveillance audits and periodic recertifications. Requiring a full 12 months of remaining validity at the exact moment of tender submission creates an artificial and disproportionate barrier to entry. It unfairly discriminates against long-standing, continuously certified contractors whose scheduled annual audit or 3-year recertification cycle happens to fall due within the next 12 months—despite having maintained certified status for years or decades. In accordance with international public procurement principles of equal treatment, non-discrimination, and proportionality, standard practice requires only that a certificate is valid at the time of submission, backed by an obligation to maintain valid certification throughout contract execution. To ensure open, non-discriminatory competition and align with standard UN procurement guidelines, the Employer is requested to: Remove and delete the requirement stating that ISO certificates must have at least one year (12 months) of remaining validity beyond the tender submission deadline; and Amend the qualification criteria to state that ISO certificates must simply be valid on the date of tender submission, with the Tenderer providing a formal written undertaking to maintain valid ISO certification throughout the performance of the Contract.Answer : Removal of the 12-month requirement : Not applicable. The tender documents do not require ISO certificates to have any minimum remaining validity. Criterion 1.2 of Section II: Evaluation Method and Criteria requires ISO 9001, ISO 14001 and ISO 45001 certifications held by the lead member of the JV for at least one (1) year and valid at the date of proposal submission.Amendment of the criteria : Not required. A certificate that meets these conditions will be accepted irrespective of its expiry date. Criterion 1.2 is a scored technical criterion, not a qualification requirement. No amendment will be issued.

New clarification added: Question  : The Tender Documents include specific forms/templates for presenting the curriculum vitae (CV) of Key Personnel. International engineering companies typically maintain standardized corporate CV formats or standard Europass formats for their key experts, which comprehensively detail professional experience, educational background, project roles, and certifications. Allowing tenderers to utilize these standard corporate formats reduces administrative burden while ensuring all essential qualification data is clearly presented. Could the Employer please clarify the formatting requirements for Key Personnel CVs: Is it permissible for Tenderers to submit CVs using their own corporate, standard, or Europass formats, provided that all mandatory information, data fields, and qualification criteria required in the Employer’s template are fully covered? If strict adherence to the official UNOPS CV template is mandatory, will the Employer confirm that tenderers may attach detailed corporate CVs or supplementary documentation as supporting annexes?Answer : Own or Europass formats. Not accepted. Schedule 0.5 [Format for Resume of Proposed Key Personnel] is mandatory. As stated in the instructions for completing the returnable Schedules (Section IV), no alterations to its format shall be permitted and no substitutions shall be accepted.Supporting annexes. Corporate or Europass CVs and supporting documents (e.g. degree and licence certificates) may be attached to Schedule 0.5 as supporting evidence only. Evaluation will be based on the information provided in Schedule 0.5.Question  : During the review and preparation of Section IV (Returnable Schedules) of the Tender Documents, a pagination discrepancy was noted. The document header/footer indicates a total length of 37 pages (ending at Page 34 of 37), but Pages 35 through 37 appear to be missing or abridged in the published tender dossier. Tenderers require the complete set of schedules to ensure all mandatory submission forms and requirements are fully met. Could the Employer please clarify and confirm the following regarding Section IV (Returnable Schedules): Could the Employer confirm whether Pages 35 through 37 of Section IV (Returnable Schedules) were inadvertently omitted from the tender dossier? If these missing pages contain mandatory returnable forms, templates, or instructions, will the Employer please issue the complete, unabridged version of Section IV via an official addendum?Answer : Missing pages. No pages have been omitted. Section IV – Returnable Schedules (Update 2) is complete as published and ends with Schedule 3.1 [Self-disclosure]. The returnable Schedules that Offerors must submit are those listed in Schedule 0.13 [Proposal Checklist], and all of them are included in the published document. The page count shown in the footer is a formatting matter and does not indicate missing content.Re-issue. Not required. No addendum will be issued for this matter.Question  : During the commercial review, discrepancies in pagination and potential missing pages or truncated tables were identified within the published Price Schedules / Cost Breakdown forms. To ensure accurate pricing, complete transparency, and fair comparison across all tenderers, the complete set of financial breakdown tables and line-item schedules must be available in full. Could the Employer please clarify and confirm the following regarding the Price Schedules / Financial Proposal forms: Could the Employer verify whether the published Price Schedules / Cost Breakdown templates in the tender package are complete, or if certain pages or schedule sections were inadvertently omitted? If pages, items, or summary tables are missing, will the Employer please re-issue the complete, unabridged Price Schedule package (preferably in an un-protected, editable Excel format) via an official tender addendum? Could the Employer clarify which financial schedule or summary level takes precedence in the event of minor structural or formatting discrepancies across the financial forms?Answer : Completeness. The published Price Schedule (SECTION IV – Schedule 2.1.A, B & C – Price Schedule Form – Update 2, Excel) is complete. It comprises the Preambles, Cover Page, Grand Summary, Schedule 2.1A [Design Price Schedule], Schedules 2.1B-1 to 2.1B-11 [Works Price Schedule] and Schedule 2.1C [Daywork Schedule]. Its structure matches the Financial Proposal schedules listed in Section IV, Schedule 2.1 and Schedule 0.13 [Proposal Checklist].Re-issue / editable format. Not required. The workbook is already published in editable, unprotected Excel format. In accordance with Preambles 5.0 and 6.0, Offerors may add lines under “List Components” and “Any other items included by bidder” where required.Precedence. Arithmetic errors and discrepancies will be corrected in accordance with Section I, Article 28 [Minor Informalities, Errors or Omissions]:the unit price prevails over the line item total;subtotals prevail over totals;words prevail over figures, subject to (i) and (ii).In accordance with Preamble 2.0, the total of the prices in the Price Schedule constitutes the Offeror’s offer to complete the Works on a single responsibility basis.Question : In international procurement procedures, clarification on submission mechanics is essential to ensure compliance with tender rules and UN eSourcing portal protocols. Specifically, tenderers require confirmation on whether the tender follows a single-stage process (where technical and financial proposals are submitted simultaneously) or a two-stage process (where technical proposals are evaluated first, and only shortlisted/technically qualified tenderers are subsequently invited to submit financial proposals). Could the Employer please clarify the exact structure and sequence of the submission and evaluation process: Is this tender conducted as a single-stage procedure (simultaneous submission of both Technical and Financial proposals by the tender deadline) or a two-stage procedure (where Financial proposals are requested only after the technical evaluation is concluded)? If both Technical and Financial proposals must be submitted simultaneously by the closing date, will the evaluation follow a Two-Envelope system (i.e., separate digital uploads in the UN eSourcing portal), ensuring that Financial proposals remain sealed and unopened until technical compliance has been fully evaluated and established?Answer : Offerors shall submit their Technical Proposal and Financial Proposal together by the deadline for proposal submission set out in the Particulars (Section I, Article 22 [Deadline for Proposal Submission]). Financial Proposals will not be requested separately after the technical evaluation.Two-envelope system. Yes. In accordance with Section IV, Schedule 2.1 [Financial Proposal], the Financial Proposal shall be uploaded as a separate document in the placeholder designated for financial offers on the eTendering platform. No financial or price information shall be included in the Technical Proposal (Section I, Article 23 [Proposal Submission]); proposals that do not comply shall be rejected. The technical evaluation shall be completed before Financial Proposals are opened, and Financial Proposals will be opened only for proposals that achieve the minimum technical threshold (Section I, Article 25 [Opening of Proposals]; Section II, Evaluation Method, items 3 and 4).

New clarification added: Question : In international donor-funded Design and Build tenders, requiring key personnel to hold pre-existing local registration with the national Engineering Chamber of the host country at the tender or award stage places foreign contractors at a significant administrative disadvantage and restricts open international competition. Standard practice in comparable international projects allows key experts to demonstrate their professional qualifications, design authority, and works management authorization through valid charter status or licensing issued by their home country’s recognized professional engineering chamber (e.g., from an EU Member State or equivalent jurisdiction). To align with international procurement standards and ensure open competition among international tenderers, will the Employer please: Amend the qualification criteria to confirm that valid professional engineering licenses, charters, or chamber registrations issued by competent authority/bodies in an EU Member State or the expert's home country are fully accepted as proof of qualification for design and construction management roles? Remove the mandatory requirement for registration with the Engineering Chamber of Kosovo as an eligibility/qualification condition, or alternatively confirm that any necessary local registration for project execution may be completed post-award during the mobilization phase?Answer : Amendment of qualification criteria. Not accepted. As stated in Annex A [ToR] (Key Personnel – Statutory Licensing & Professional Qualification Recognition Note), registration with the Chamber of Engineers of the Republic of Kosovo is not an eligibility requirement and is not required at proposal submission. Key Personnel are evaluated against the qualification and experience criteria in Section II: Evaluation Method and Criteria.Local registration. The requirement for licensing or qualification recognition by the Chamber derives from the applicable Laws of Kosovo, and UNOPS cannot waive it. In accordance with Note 3, the successful Offeror shall provide proof of active licensing or of official application submission to the Chamber before contract signing and mobilization. No engineer may perform design sign-off or site supervision, or act as Engineer of Record, until licensing or recognition is completed (Notes 1 and 2).Question : In complex Design and Build projects encompassing multiple infrastructure facilities (five Wastewater Treatment Plants and one Chemical Storage unit), technical design decisions, equipment selections, and sizing depend heavily on the financial ceiling. Disclosing the estimated contract value or budget allocation enables tenderers to optimize their technical design proposals to best meet the Employer’s operational expectations while remaining strictly within the Employer's budget constraints. Could the Employer please clarify the financial framework for this tender by providing the following information: Could the Employer disclose the overall estimated contract value or maximum allocated budget for this project? If the exact estimated value cannot be disclosed due to internal procurement policies, will the Employer confirm whether a maximum financial threshold exists, above which financial offers will be deemed non-compliant or automatically disqualified?Answer : UNOPS does not disclose the estimated contract value or budget. No maximum price threshold is applied as a compliance criterion; proposals will be evaluated in accordance with Section II: Evaluation Method and Criteria. UNOPS reserves its rights under Section I: Instructions to Offerors, Article 35 [Other UNOPS Rights], including not to accept any proposal.Questions : Wastewater generated within thermal power plants possesses highly specific, complex chemical and physical characteristics that significantly differ from standard municipal or general industrial wastewater. Successfully designing and commissioning treatment facilities within an active power plant environment requires specialized process engineering and operational expertise. Clarification is requested on whether the technical evaluation methodology recognizes and rewards reference projects specifically executed within thermal power plants or similar heavy energy sector facilities. Could the Employer please clarify and confirm the following regarding the technical evaluation of tenderers' reference projects: Will reference projects specifically demonstrating experience in the Design and Build of Wastewater Treatment Plants within thermal power plants or similar heavy energy sector facilities be awarded higher scores or preferential weighting during technical evaluation compared to general industrial or municipal WWTP references? If the technical evaluation uses a points-based or tiered scoring matrix, could the Employer disclose the specific scoring breakdown or criteria applied to differentiate high-complexity power plant references from standard WWTP experience?Answer : Preferential weighting. No. Reference projects are scored only under Criterion 1.3 of Section II, which covers Design & Build contracts for wastewater treatment plants or comparable industrial water treatment facilities. No additional weighting is given to references executed within thermal power plants or the heavy energy sector.Scoring breakdown :  The full scoring breakdown is published in Section II. Further breakdown of scoring criteria will be published with next Amendment to Tender. Question : In international procurement procedures, the evaluation framework determines pricing strategy. Tenderers require formal confirmation on whether the procurement process permits post-submission negotiations or a Best and Final Offer (BAFO) round with technically qualified bidders, or if the financial offer submitted on the tender closing date is considered the final, non-negotiable price proposal. Could the Employer please clarify the procedure regarding contract negotiations and financial offers: Does the Employer reserve the right to enter into commercial/financial negotiations or request a Best and Final Offer (BAFO) with technically compliant tenderers prior to award? Alternatively, will the financial evaluation be conducted strictly based on the initial financial proposal submitted, requiring tenderers to treat their initial submission as their final and lowest possible price?Answer :The RFP does not provide for a Best and Final Offer round. In accordance with Section I, Article 31 [Award Criteria], UNOPS reserves the right to conduct negotiations with the offeror recommended for award on the content of its proposal.Basis of financial evaluation. The financial evaluation will be based on the Financial Proposal submitted by the deadline, in accordance with Section II. During evaluation, offerors shall not make any changes to the substance or price of their proposal (Section I, Article 26 [Clarification of Proposals]). Offerors should therefore submit their best price in initial tender offering. 

New clarification added: Question : In international design-build projects, security during the warranty phase (Defects Notification Period – DNP) is typically covered either by holding the second half of the Retention Money or by maintaining a bank guarantee. Requiring both an active bank guarantee (or extended Performance Guarantee) and retained funds during the DNP results in redundant security coverage, tying up contractor credit lines and unnecessarily increasing financing costs reflected in tender pricing. Could the Employer please clarify the specific security requirements applicable during the Defects Notification Period (DNP): Is the remaining portion of the Retention Money intended to serve as the sole security for defect rectification obligations during the DNP? Is the Contractor required to provide a separate Bank Guarantee for Defect Rectification / Maintenance during the DNP? If a separate Defects Liability Guarantee (or extended Performance Guarantee) is required during the DNP, will the Employer confirm that the initial Performance Guarantee (or the held Retention Money) will be released in full upon issuance of the Taking-Over Certificate?Answer : The Employer confirms the following security arrangements during the 12-month Defects Notification Period (DNP), in accordance with the Conditions of Contract and Schedule 1 – Schedule of Details:1. Retention Money: A retention of 5% shall be deducted from interim payments. Upon issuance of the Taking-Over Certificate for the whole of the Works, 50% of the accumulated Retention Money shall be released, with the remaining 50% released following expiry of the DNP, subject to the applicable contractual provisions.2. Separate Defects Liability Guarantee: No additional or separate Defects Liability/Maintenance Bank Guarantee is required.3. Performance Bank Guarantee: The initial Performance Bank Guarantee of 5% of the Contract Price shall be reduced to 2.5% upon issuance of the Taking-Over Certificate for the whole of the Works. The reduced guarantee shall remain valid until expiry of the DNP.4. Security During the DNP: Both the remaining Retention Money and the reduced Performance Bank Guarantee shall remain in place during the DNP, as expressly specified in the Contract. Full release of these securities upon Taking Over is therefore not envisaged.Question : The Tender Documents include references to the "Schedule of Details." However, it is not explicitly clear which specific section, template, or form within the tender dossier corresponds to this title, or whether it refers to the "Tender Particulars" / "Contract Data" or a specific schedule to be completed and submitted by the Tenderer. Could the Employer please clarify and confirm the following regarding the "Schedule of Details": Which specific document, section, or form within the Tender Documents constitutes the "Schedule of Details"? Does this term refer to the "Tender Particulars" section, or is it a separate mandatory returnable schedule/template that Tenderers must complete and submit as part of their Tender? If it is a mandatory returnable document, could the Employer please provide or identify the required template?Answer : The “Schedule of Details” is Schedule 1 of the Contract, as defined in Sub-Clause 1.1 of the General Conditions (“‘Schedule of Details’ is Schedule 1”). It is included in Section III – Conditions of Contract (Update 1), under the heading “Schedule 1 – Schedule of Details”.It is part of the Contract documents. It is not the Tender Particulars and it is not a returnable schedule. Offerors are not required to complete or submit it with their Proposal, and it does not appear in Schedule 0.13 [Proposal Checklist]. The Employer has completed its entries in Section III – Update 1. The Contractor-specific entries (Contractor’s Representative, Contractor’s address for communications and the Accepted Contract Amount) will be completed at contract award from the successful Offeror’s Proposal. As stated in Section IV – Returnable Schedules, “Schedule 1: Contract Details” must be left blank, and including any information in it may invalidate the offer.Not applicable. No separate template is required. Offerors shall submit only the returnable schedules listed in Schedule 0.13 [Proposal Checklist] of Section IV.Question : The tender criteria require key engineering personnel to be registered or licensed with the competent Professional Engineering Chamber / Licensing Authority in Kosovo. For international tenderers utilizing foreign key personnel, the official local registration and diploma nostrification processes are subject to external administrative procedures governed by national authorities outside the Tenderer's control. These administrative procedures can be time-consuming and unpredictably extended, creating a significant risk of delay between the Notice of Award and Contract Signing or the commencement of design works. Could the Employer please clarify and confirm the following regarding the professional registration of foreign engineering personnel: Could the Employer define the expected official timeframe and administrative procedure required for foreign key personnel/engineers to successfully complete registration with the relevant Engineering Chamber in Kosovo? Will the Employer confirm that for the purpose of Contract Award and Contract Signing, it is sufficient for foreign key personnel to provide proof of application/submission for local registration, with final chamber approval to be completed during the initial mobilization or design phase? Will the Employer confirm that it assumes the time-related responsibility/risk associated with local administrative processing delays, and that reasonable extensions of time will be granted for contract execution or design submission milestones if registration processing by external authorities exceeds standard timeframes through no fault of the Contractor?Answer : Timeframe and procedure. The recognition and licensing procedure is administered by the Chamber of Engineers of the Republic of Kosovo, and UNOPS cannot specify its duration, as already stated in the response to Clarification Request 29. The procedure, regulations and application requirements are available on the Chamber of Engineers portal, as referenced in Annex A [ToR], Key Personnel – Statutory Licensing & Professional Qualification Recognition Note. Offerors are responsible for informing themselves of these requirements and planning their programme accordingly.Proof of application. As stated in Annex A [ToR], Key Personnel Note 3, the successful Offeror shall provide proof of active licensing or of official application submission to the Chamber before contract signing and mobilization. In accordance with Notes 1 and 2, no engineer may perform design sign-off or site supervision, or act as Engineer of Record, until licensing or qualification recognition by the Chamber is completed. Under the ToR, Key Personnel may meet the licensing requirement by holding, or partnering with, a valid Kosovo engineering license.Time-related risk. Not confirmed. Obtaining all required local approvals and licenses, including the licensing of Contractor’s Personnel, is the Contractor’s responsibility, and its costs are included in the Contract Price (Annex A [ToR], Construction Works deliverable). Delays in these procedures shall not on their own entitle the Contractor to an extension of time. Any claim shall be assessed solely in accordance with the Conditions of Contract.

New clarification added: Question : 5. Wastewater streams and fractions for WWTP inlets Based on tender document (Annex I – TPP Kosovo B Wastewater Background Information, V3_Technical specification), there exist four independent wastewater networks as of now: Sludge network, Bottom ash water network, Sewage network and Rainwater/chemical neutral water network. The description suggests the following statements: - The Bottom ash water network corresponds to the future intake of WWTP A - The Sewage network corresponds to the future intake of WWTP E - The Outlet of the Rainwater and Chemical Neutral water network at the southern edge of the plant will constitute the connection point to the future WWTP C (rainwater treatment device). For Rainwater from the coal yard, the new drainage system and respective treatment device, would be scope of work on this tender. - The Sludge transported in the Sludge network will constitute part of the inflow to WWTP D. Please confirm that these wastewater streams are available from separate networks in the proposed locations of the wastewater treatment plants.Answer : The understanding is generally correct. Based on Annex I, the Employer's Requirements, and the available topographic survey drawings, the existing wastewater streams are allocated as follows:WWTP-A: Bottom ash wastewater network.WWTP-C: Rainwater and chemical-neutral wastewater network, including coal yard runoff.WWTP-D: Sludge network and relevant wastewater streams from the existing Water Treatment Plant.WWTP-E: Sewage wastewater network.The existing wastewater networks are generally separated, except for the rainwater network associated with WWTP-C, which currently receives mixed flows, including HFO-contaminated and oily wastewater.Therefore, the Contractor shall provide the necessary separation and diversion of these streams to ensure that HFO-contaminated and oily wastewater is directed to WWTP-B and that the appropriate rainwater streams are directed to WWTP-C.The Contractor shall verify the existing network conditions, connections, flow directions, and capacities during detailed design. Any necessary modifications, separations, diversions, and connections shall be included in the Contractor's Design and Build scope in accordance with the Employer's Requirements.The available topographic survey drawings provide additional information on the existing networks; however, the exact connection points shall be confirmed during detailed design.Question : A review of the Tender Documents indicates potential ambiguities or conflicting references regarding the precise duration of the Defects Notification Period (DNP) / Warranty Period applicable to the five (5) Wastewater Treatment Plants and the Chemical Storage facility, where both 12-month and 24-month periods are mentioned across different contract sections. Could the Employer please clarify and unequivocally confirm whether the required Defects Notification Period (DNP) for the entire scope of works (or specific operational/mechanical components) is 12 months or 24 months from the date of issuance of the Taking-Over Certificate?Answer : The Employer confirms that the Defects Notification Period (DNP) is 12 months (365 days) from the date of issuance of the Taking-Over Certificate, as specified in Schedule 1 – Schedule of Details, Sub-Clause 1.1.This period applies to the entire scope of Works, including all five (5) Wastewater Treatment Plants (WWTP-A to WWTP-E), the Chemical Storage Facility, and associated installations.Prior to commencement of the DNP, the Contractor shall complete the required testing, commissioning, and three (3) month trial operation period, including the required training and capacity-building programme for KEK operational personnel, in accordance with the Employer's Requirements.Following successful completion of these activities and issuance of the Taking-Over Certificate, the 12-month DNP shall commence.The 24-month period refers to the required supply of operational consumables, chemicals, and spare parts necessary for the operation and maintenance of the WWTPs,Question : Requiring both a full-value Performance Security (Bank Guarantee for Performance) and ongoing deductions for Retention Money creates a cumulative financial burden and significant cash-flow constraints on the Contractor. Combining both mechanisms results in double security for the same performance obligations during the execution phase. Clarification Request / Question: Could the Employer please clarify the following security and retention requirements: What is the exact required percentage or amount for the Performance Security (Performance Bank Guarantee)? What is the rationale for demanding Retention Money in addition to the Performance Security? To ease liquidity constraints and maintain competitive pricing, will the Employer consider waiving or reducing the percentage of Retention Money deductions?Answer : (1) The Bank Guarantee for performance is 5% of the Contract Price, as confirmed in the clarification of 03.09.2026. (2) Performance security and Retention Money are separate instruments under Sub-Clauses 4.2 and 14.3/14.9. Their combined amount (10% of the Contract Price) is in line with UNOPS policy for contracts for works and was set taking into account the Retention release terms. (3) The request is not accepted. Retention remains 5% of each payment, released in accordance with Sub-Clause 14.9 and Annex A [Terms of Reference], Section 5.6.

New clarification added: Question :  Delay Damages Applicable to Individual Sections Further to your response (Clarifications 29.09.2026.), confirming Delay Damages of 0.1% of the original total Contract Price per day, capped at 10% of the original total Contract Price, please clarify how Delay Damages will apply where individual WWTPs or other parts of the Works are treated as separate contractual Sections. Please confirm: • which parts of the Works will constitute contractual Sections; • the applicable Time for Completion for each Section; • whether Delay Damages will apply separately to each Section; and • if so, whether the applicable rate and cap will be calculated by reference to the price/value of the delayed Section or to the original total Contract Price. Please also ensure that the relevant Sections, completion dates and Delay Damages mechanism are clearly reflected in the updated Contract Schedules.​Answer : "In accordance with Sub-Clause 1.15 and Schedule 4 [Schedule of Sections], the Works are divided into six contractual Sections:Phase 1: WWTP-B, WWTP-C (including Coal Yard), and WWTP-E.Phase 2: WWTP-A, WWTP-D, and the Chemical Storage Building.Each Section includes design preparation, review and approval procedures, construction, installation, testing, commissioning, and completion of the respective Works.The Time for Completion for each Section shall be based on the programme submitted by the successful bidder, reviewed and agreed with the Employer, and incorporated into Schedule 4 of the Contract.Delay Damages shall apply separately to each delayed Section at a rate of 0.1% of the original total Contract Price per calendar day, subject to an aggregate maximum of 10% of the original total Contract Price, irrespective of the number of delayed Sections.Upon reaching this maximum, the Employer may terminate the Contract in accordance with Sub-Clauses 8.7(g) and 15.2(b), subject to 14 days' written notice. Termination is not automatic, and the Contractor remains responsible for completing the Works unless the Contract is terminated.Question  : 3. Payment for Plant and Materials under Sub-Clauses 14.4 and 14.5 Further to your response to Question 6 (Clarifications 29.09.2026.), the contractual payment milestones and payment timeline have been clarified. However, the response does not address the treatment of Plant and Materials under Sub-Clauses 14.4 and 14.5. Please therefore explicitly confirm whether payment will be permitted for eligible Plant and Materials manufactured, shipped, delivered to Site or otherwise procured for incorporation into the Works prior to their physical incorporation into the Permanent Works. If yes, please specify: • the applicable percentage or basis of payment; • the documentary requirements; • whether title/ownership transfer is required; • any insurance/storage requirements; and • whether Sub-Clause 14.5 will remain applicable under the final Schedule 7 – Schedule of Payments.Answer : Payment for Plant and Materials before they are incorporated into the Permanent Works is not provided for.As specified in Schedule 7, Sub-Clause 14.5 [Plant and Materials intended for the Works] shall not apply to this Contract.Accordingly, all payments shall be made against the agreed contractual milestones, subject to certification by the Employer's Representative, in accordance with Sub-Clause 14.4 and Schedule 7.The Conditions of Contract and Schedule of Payments remain unchanged.Question : 4. Insurance Evidence at Proposal Stage Further to your response to the Insurance Requirements, Question 1 (Clarifications 29.09.2026), the required insurance types, limits, deductibles, insurer rating and periods of validity have been clarified. However, the response does not clarify the evidence required at Proposal stage. Please confirm whether, at Proposal stage, the Offeror may submit evidence of its existing general/corporate insurance programme or policies, with the required project-specific policies to be arranged and evidenced after Contract award and prior to commencement of the relevant insured activities. Please also confirm whether any insurer quotation, premium indication or premium pre-invoice is required to be submitted with the Financial Proposal, or whether proof of insurance availability/coverage is sufficient at Proposal stage.Answer : At proposal stage, offerors shall complete Schedule 2.9 [Insurance Details and Insurances] and may provide details of their existing corporate insurance programme. The project-specific insurances required under Clause 18 and Price Schedule Item 1.1 shall be effected after award and evidenced under Sub-Clause 18.1 (cover notes and/or broker letter) before commencement of the relevant activities; payment may be withheld under Sub-Clause 14.7(d) until evidence is provided. As stated in Price Schedule Item 1.1, the premium priced for each insurance shall be supported by the insurer's pre-invoice or quotation, to be included in the Financial Proposal. 

New clarification added: Question : Clarification Request 14. Sub-Clause 13.1(e) and Sub-Clause 13.2 - Practical difference and applicable procedure  Sub-Clause 13.1(e) allows the Contractor to submit a written request for a "Contractor Requested Variation" which, if adopted, will (i) accelerate completion, (ii) reduce cost to the Employer, (iii) improve efficiency or value, or (iv) otherwise be of benefit to the Employer.  Sub-Clause 13.2 (Value Engineering) allows the Contractor to submit a written proposal which, if adopted, will achieve substantially the same four categories of benefit. Both mechanisms involve a written submission by the Contractor to the Employer's Representative.  Could the Employer please clarify the practical difference between a "Contractor Requested Variation" under Sub-Clause 13.1(e) and a "Value Engineering Proposal" under Sub-Clause 13.2, and how the two Sub-Clauses are to be applied?Answer : A Contractor Requested Variation under Sub-Clause 13.1(e) is a request for a Variation which, in the Contractor's reasonable opinion, is necessary for the proper performance of the Works. A Value Engineering proposal under Sub-Clause 13.2 is an optional proposal that the Contractor may submit at any time to accelerate completion, reduce the cost of executing, maintaining or operating the Works, or otherwise benefit the Employer, and shall include the items listed in Sub-Clause 13.3. In both cases the submission is prepared at the Contractor's cost, the Employer's Representative may approve or reject it at its absolute discretion, and no entitlement arises unless and until a Variation is instructed under Clause 13. Neither mechanism may be used for changes necessitated by an act, omission or default of the Contractor (Sub-Clause 13.1(h)). Sub-Clauses 13.1 and 13.2 remain unchanged.Question : Clarification Request 22. Applicable Law – The Country and Laws – Sub-Clause 1.1  Sub-Clause 1.1 defines "Country" to mean "the country in which the Site (or most of it) is located, where the Permanent Works are to be executed". "Law(s)" is in turn defined to mean, among other things, "all legislation, including, decrees, resolutions, acts, statutes, ordinances, rules, regulations, directives and other orders, treaties, bylaws, codes of practice and other subordinate legislation, of the Country", together with "the requirements, rules and regulations of any Authority" and "the guidelines of the Country and of all relevant Authorities, with which the Contractor is legally required to comply". Sub-Clause 22(a) similarly requires the Contractor to comply with "the imports and customs Law and regulations of the Country". Given that "Country" and "Law(s)" are defined objectively by reference to the Site's location, and that the Site for this Project is located in Kosovo, please confirm whether the Employer intends for Kosovo's domestic legislation, and the requirements, rules and regulations of Kosovo Authorities, to constitute "Law(s)" for the purposes of the Contractor's compliance obligations under Sub-Clause 1.13 [Compliance with Laws] and Sub-Clause 22(a) [Imports and Customs].Answer : Sub-Clauses 1.1, 1.13 and 22 remain unchanged. The Contractor shall comply with all Laws, and with the requirements of all Authorities, as defined in Sub-Clause 1.1. As stated in the tender documents, this includes the legislation, regulations and requirements applicable in Kosovo, including but not limited to:the national wastewater discharge requirements (Appendix 3-2 to the Employer’s Requirements);the licensing requirements of the Chamber of Engineers (Annex A [ToR], Key Personnel Note);all building, environmental, water and other statutory permits and approvals required under Annex A [ToR] and Sub-Clause 1.13(c);applicable import and customs requirements under Clause 22(a).Question : 1. Aggregate Liability / Performance Damages / Overall Exposure Further to your response to Question 3 (Clarifications 29.09.2026.), the applicable Delay Damages rate and cap have now been confirmed as 0.1% of the original total Contract Price per day, capped at 10% of the original total Contract Price. However, the response does not address the remaining points concerning the Contractor’s aggregate liability and performance damages. Please therefore clarify and confirm: • the applicable aggregate liability cap under Sub-Clause 17.6; • the applicable overall cap for performance damages under the Employer’s Requirements / Sub-Clause 9.4; • whether performance damages may be applied cumulatively with Delay Damages; and • the maximum overall Contractor exposure where Delay Damages and performance damages apply in addition to liabilities otherwise subject to the general aggregate liability cap.Answer : The Employer confirms the following:1. Aggregate Liability: The Contractor’s aggregate liability shall be governed by Sub-Clause 17.6, including the applicable liability cap and expressly stated exclusions.2. Performance Damages: Performance damages shall be governed by Sub-Clause 9.4 and the Employer’s Requirements. The applicable maximum cap, if any, shall be confirmed in accordance with the Contract documents.3. Cumulative Application: Delay Damages and performance damages may apply cumulatively where their respective contractual conditions are met, subject to the applicable limitations and without double recovery for the same breach.4. Maximum Overall Exposure: The Contractor’s maximum overall exposure shall be determined by the general aggregate liability cap under Sub-Clause 17.6, together with any damages expressly excluded from that cap, including Delay Damages and performance damages where applicable, subject to their respective limits.

New clarification added: Question : Clarification Request 6. Sub-Clause 3.3(b) - Whether "the instructions given" refers only to written instructions  Sub-Clause 3.3(b) provides:  "Subject to Sub-Clause 3.3(c), all instructions shall be given in writing. The Contractor shall comply with the instructions given by the Employer's Representative... with due expedition and without delay."  The second sentence refers simply to "the instructions given", without repeating the word "written".  Could the Employer confirm whether "the instructions given" is to be read as "the written instructions given" (by cross-reference to the first sentence and to Sub-Clause 1.3), such that the Contractor's compliance obligation applies only to instructions given in writing (or verbal instructions properly confirmed in writing under Sub-Clause 3.3(c)); or whether the Contractor may also be obliged to comply with an instruction given otherwise than in writing?Answer : 3.3(b), all instructions shall be given in writing, subject only to Sub-Clause 3.3(c). The Contractor's obligation to comply relates to instructions given in writing and to verbal instructions given in the circumstances described in Sub-Clause 3.3(c). Under Sub-Clause 3.2(c), the Contractor shall only take instructions from the Employer's Representative and the Employer's Personnel to whom authority has been delegated. Sub-Clause 3.3(b) remains unchanged.Question : Clarification Request 7. Sub-Clause 3.3(c) - Confirmation mechanism for verbal instructions and status of verbal instructions outside its scope  Sub-Clause 3.3(c) provides:  "Verbal instructions may only be given by the Employer's Representative... in an emergency or where the Employer or the Employer's Representative considers that there is a risk of damage or injury to the Works or any person, provided written instruction confirming the verbal instruction is issued within 48 hours."  The Sub-Clause does not specify which Party is responsible for the written confirmation, or the consequence of a failure to confirm within 48 hours.  Could the Employer clarify:  (a) whether the Employer's Representative is expected to issue the written confirmation on its own initiative, or whether the Contractor is instead expected to send a written request or written record of the verbal instruction for confirmation;  (b) if the Contractor is expected to send such a written request or record, within what period following its receipt, and in the absence of any response, that request or record is to be treated as having confirmed the verbal instruction (i.e., whether silence for a specified period is deemed to constitute the written confirmation, and if so, what that period is);  (c) if no written confirmation is issued within 48 hours, whether the verbal instruction ceases to have effect, or remains valid and binding, and if the latter, what remedy is available to the Contractor; and  (d) whether the Contractor is bound to comply with a verbal instruction given otherwise than in the circumstances described in Sub-Clause 3.3(c), and if so, what confirmation mechanism and timeframe apply to it?Answer : (a) Who confirms. Under Sub-Clause 3.3(a), instructions are issued by the Employer’s Representative or by Employer’s Personnel with delegated authority under Clause 3, so the written instruction confirming a verbal instruction under Sub-Clause 3.3(c) is issued by them. The Contractor may at any time request written confirmation from the Employer’s Representative.(b) Deemed confirmation. No. The Contract does not provide for deemed confirmation by silence. A verbal instruction is confirmed only by a written instruction issued in accordance with Sub-Clause 3.3(c).(c) No confirmation within 48 hours. Sub-Clause 3.3 remains unchanged and no further interpretation is provided. If the Contractor questions any instruction, it may refer the matter to the Employer under Sub-Clause 3.1(c)(v), and the Employer shall promptly confirm, reverse or vary the instruction.(d) Verbal instructions outside Sub-Clause 3.3(c). In accordance with Sub-Clause 3.3(b), all instructions other than those described in Sub-Clause 3.3(c) shall be given in writing. In accordance with Sub-Clause 13.3(c), each instruction to execute a Variation shall be issued by the Employer’s Representative to the Contractor’s Representative. A verbal instruction given outside the circumstances described in Sub-Clause 3.3(c) does not constitute an instruction under the Contract until it is issued in writing.Question : Clarification Request 9. Sub-Clause 4.4(g) - Missing "Schedule of Form of Subcontractor Side Agreement"  Sub-Clause 4.4(g) requires the Contractor to procure that any Subcontractor enters into a side agreement in favour of the Employer, in the form set out in the "Schedule of Form of Subcontractor Side Agreement". Unlike the "Schedule of Form of Collateral Warranty", which Sub-Clause 1.1 expressly defines as Schedule 10 and which is included among the Schedules, no "Schedule of Form of Subcontractor Side Agreement" appears among the 17 Schedules listed in Sub-Clause 1.1 or set out at the end of Section III.  Could the Employer clarify:  (a) whether a "Schedule of Form of Subcontractor Side Agreement" exists and will be issued or appended to the Contract, and if so, when it will be made available to bidders; or  (b) if no such form is intended to be issued, how the Contractor and any Subcontractor are expected to comply with Sub-Clause 4.4(g) in its absence?Answer : No separate Schedule of Form of Subcontractor Side Agreement will be issued with the RFP. In accordance with Sub-Clause 4.4(g), a subcontractor side agreement is required only upon request of the Employer’s Representative during the performance of the Contract, in such form as the Employer may reasonably require. No submission is required at proposal stage. Sub-Clause 4.4(g) otherwise remains unchanged.Question : Clarification Request 10. Sub-Clause 6.16 / 6.17 - Numbering  In Clause 6, the heading "6.16 Epidemics" is followed by a paragraph numbered "6.17" (addressing outbreaks of illness), which is immediately followed by the heading "Fundamental Principles and Rights of Work" (addressing ILO principles, safe working conditions and child labour), which is not given its own number but whose sub-paragraph (c) also refers to "this Sub-Clause 6.17".  Could the Employer please confirm whether the Epidemics text is intended to be Sub-Clause 6.16, and "Fundamental Principles and Rights of Work" is intended to be heading of Sub-Clause 6.17, and issue a corrected version of Section III accordingly?Answer : Confirmed. Sub-Clause 6.16 is [Epidemics] and Sub-Clause 6.17 is [Fundamental Principles and Rights of Work]. This is a formatting error only and does not change the content of either Sub-Clause; the cross-references in Sub-Clauses 6.17(c), 6.18 and 15.2(a) apply accordingly 

New clarification added: Question : Sub-Clause 4.2(c) provides"If at any time the Contract Price increases by more than 5% whether because of one increase or multiple increases as a result of approved Variations, the Contractor shall provide an additional unconditional and irrevocable Bank Guarantee for performance from a leading and accredited bank approved by the Employer and in the form set out in the Schedule of Forms of Security equal to the amount specified in the Schedule of Details." Sub-Clause 1.1 defines "Contract Price" as "the price specified in the Schedule of Contract Price, and includes any adjustments to the price made in accordance with the Contract." Because this definition provides that "Contract Price" already includes any adjustments made under the Contract, it is unclear against which figure the 5% increase is to be measured. Could the Employer confirm whether the 5% threshold is to be calculated (a) cumulatively, against the original Contract Price as first specified in the Schedule of Contract Price at the Date of the Contract, or (b) incrementally, against the most recently adjusted Contract Price immediately prior to the Variation in question?Answer  :(a) Cumulatively. As stated in Sub-Clause 4.2(c), the 5% threshold may be reached “because of one increase or multiple increases as a result of approved Variations”. The threshold is therefore measured against the Contract Price as specified in the Schedule of Contract Price at the Date of the Contract (the Accepted Contract Amount), and all approved Variations increasing the Contract Price are added together. The amount of the additional Bank Guarantee for performance shall be as specified in Schedule 1 [Schedule of Details].Where the cumulative increase resulting from approved Variations exceeds 5% of the original Contract Price, the Contractor shall provide an additional Performance Bank Guarantee in accordance with the relevant contractual provisions and the Schedule of Details.Question : Clarification Request 2. "Taken Over" definition, limb (e), and Sub-Clause 10.1 - Occupancy/use certificate as a condition precedent to Taking Over  Sub-Clause 1.1 defines "Taken Over" to include, at limb (e):  "any certificate or approval, which shall be issued or given by an Authority to lawfully occupy or use the whole of the Works, or the relevant Section or part of the Works, has been issued or given by that Authority and provided to the Employer's Representative."  Annex A [Terms of Reference], Section 5, states:  "After the works are completed, the necessary approvals, occupancy certificates, opinions, etc., shall be obtained by the Contractor from the relevant authorities in accordance with the laws of Kosovo."  Sub-Clause 10.1(c)(i) permits the Employer's Representative to issue the Taking Over Certificate notwithstanding minor omissions, outstanding work and defects (the "Punch List"), but this discretion does not on its face extend to limb (e).  Could the Employer clarify:  (a) whether an Authority's certificate or approval permitting lawful occupation or use of the Works is a strict condition precedent to issuance of the Taking Over Certificate under Sub-Clause 10.1;  (b) if not, whether the Taking Over Certificate may be issued notwithstanding that such certificate or approval remains pending; and  (c) if it is a condition precedent, whether the Contractor is entitled to an extension of the Time for Completion for delay in obtaining it that is outside the Contractor's control?Answer : Response – Clarification on Taking Over and Occupancy/Use Certificates(a) Yes. The Employer confirms that any certificate or approval required by the relevant Authorities under applicable Kosovo legislation for the lawful occupation or use of the Works, or the relevant Section, must be obtained and submitted to the Employer's Representative before issuance of the Taking Over Certificate, in accordance with Sub-Clause 1.1 and Annex A – Terms of Reference, Section 5.(b) No. Where such certificate or approval is legally required, the Taking Over Certificate cannot be issued while it remains pending. The provisions of Sub-Clause 10.1(c)(i) concerning minor outstanding works and defects (Punch List) do not waive this requirement.(c) Delays in obtaining the required certificates or approvals do not automatically entitle the Contractor to an Extension of Time.Any such entitlement shall be assessed in accordance with Sub-Clauses 8.4 [Extension of Time for Completion], 8.5 [Delays Caused by Authorities], and 20.1 [Contractor's Claims].Any claim is subject to Sub-Clauses 8.4(e) and 20.1. In accordance with Sub-Clause 8.5(b), the Contractor shall not be entitled to any increase in the Contract Price.Question : Clarification Request 5. Sub-Clause 3.1(a) - Authority to amend the Contract  Sub-Clause 3.1(a) provides that the Employer's Representative "shall have no authority to amend the terms of the Contract unless an amendment is authorised and approved in writing by the Employer."  It is unclear whether the Employer’s Representative could amend unilaterally the Contract if amendment is is authorised and approved in writing by the Employer.  Could the Employer clarify:  (a) whether the Employer's Representative may unilaterally amend the terms of the Contract if such amendment is authorised and approved in writing by the Employer; and  (b) If the answer to (a) is no, could the Employer please clarify the intended meaning and effect of Sub-Clause 3.1(a), particularly the wording “unless an amendment is authorised and approved in writing by the Employer”?Answer :(a) No. The Employer's Representative has no authority to amend the terms of the Contract. Under Clause 22 [Miscellaneous], the Contract may only be amended in writing signed by a duly authorised representative of each of the Parties. (b) Sub-Clause 3.1(a) confirms that the Employer's Representative cannot itself amend the Contract; the words "unless an amendment is authorised and approved in writing by the Employer" mean that the Employer's Representative may only act in respect of an amendment (for example, by transmitting or signing it on the Employer's behalf) where the Employer has authorised and approved that amendment in writing, and any such amendment must still be signed by both Parties. This is distinct from the Employer's Representative's authority to instruct Variations under Clause 13, which does not amend the terms of the Contract.

New clarification added: Question : Considering the complexity of the project requirements and the substantial number of technical matters requiring clarification, including matters that remain unclear following the Client’s responses, we kindly request an extension of six (6) weeks to the current tender submission deadline of 26 October 2026, extending the deadline to 07 December 2026. The additional time is necessary to receive and assess the clarifications, incorporate the relevant information into the technical solution and cost calculations, and coordinate with specialized equipment manufacturers and suppliers. The requested extensions would provide sufficient time to properly address the outstanding technical matters, incorporate the necessary clarifications and supplier input, and complete the related technical and cost calculations. This would enable us to submit a comprehensive and well-prepared proposal that fully addresses the tender requirements and reflects our commitment to quality, accuracy, and attention to detail.Answer : The tender war Extended by Additional 31 days. Question : Dear Sir or Madam, In light of the project’s importance, the questions and revisions raised during the tender process, and the second site visit, we kindly request that the submission deadline be extended by four weeks. This additional time would allow us to address these matters thoroughly and prepare a complete proposal. We would appreciate your consideration and look forward to your response.Answer : The tender war Extended by Additional 31 days. Question : 2. Southern Collector / Existing Water Accumulation During the site visit, we were informed that the existing water accumulation in the Southern Collector area is used by KEK only as a reserve water source for operational purposes. Considering that construction works are foreseen in the same area, please confirm whether the Tenderer may consider temporary removal of the accumulated water and drying of the area for the duration of the construction works, until completion.Answer : The accumulation of water at the Southern Collector discharge point is due to the downstream weir, which is designed to maintain a reserve volume for KEK's use during emergencies when raw water from the Iber-Lepenc system is unavailable. To date, the associated pumping system has not been utilized.For the execution of the works, temporary removal or reduction of the accumulated water may be considered. The Contractor should propose an appropriate methodology, which could include temporary bypassing, phased works, or other effective measures. Any proposed plan must ensure that KEK's operational and emergency needs are consistently met throughout the project.Question : Please confirm whether a phased programme is acceptable, allowing construction of two of the six facilities to commence once their final designs are approved and the required permits are obtained, while design finalisation and permitting for the remaining facilities continue in parallel, subject to the contractual milestones.Answer : Yes, a phased program is acceptable. Construction of individual facilities can begin once the final design is approved, the necessary UNOPS design review and clearance are completed, and all relevant permits and approvals are obtained. Design finalization and permitting for the remaining facilities can proceed simultaneously, as long as the Contractor appropriately coordinates activities and adheres to the approved Contract Program, contractual milestones, site restrictions, and all other Contract requirements.Question : We also request an extension of the proposal submission deadline to allow sufficient time to incorporate the clarifications and coordinate the technical and financial proposal.Answer : The tender war extended by Additional 31 days.Question : In complex Design and Build contracts for wastewater treatment infrastructure within an operational thermal power plant, defining clear physical battery limits (interface points) and utility supply responsibilities is critical for accurate civil/piping engineering, risk allocation, and financial pricing. Standard international engineering practice dictates that the Contractor's design-build scope is strictly confined within designated facility footprints, with raw wastewater connections, discharge points, power supply, and operational media provided by the Employer at specified battery limits. Could the Employer please clarify and unequivocally confirm the following scope boundaries and operational responsibilities: Scope of Contractor: Will the Employer confirm that the Contractor’s obligation is strictly limited to the Design and Build (engineering, procurement, construction, installation, testing, and commissioning) of the five (5) Wastewater Treatment Plants and the Chemical Storage facility? Battery Limits / Interface Points: Will the Employer confirm that the physical battery limit (interface point) for raw wastewater connection and treated effluent discharge is established at 1 meter outside the outer footprint/perimeter of each facility, and that all piping, trenching, and connections beyond this 1-meter boundary remain the responsibility of the Employer? Supply of Utilities and Media: Will the Employer confirm that it will provide all necessary utilities and operational media (including raw wastewater influent, electrical power, process/potable water, and chemical reagents) at designated terminal points at no cost to the Contractor during the testing, commissioning, and trial run phases?Answer : The Employer does not confirm the proposed 1-meter battery limit, and the Contractor’s scope is not limited only to works within the individual WWTP or Chemical Storage facility footprints.This is a Design and Build contract, and the Contractor is responsible for delivering a complete and functional system, including all necessary interfaces, connections, piping, trenching, cabling, drainage and associated civil works required to connect the new facilities with the existing systems. As already clarified for the 6.3 kV connection, the Contractor shall provide the necessary cabling and associated connection works from the designated existing cubicle to the new transformer.The final interface points will be verified and agreed during detailed design in coordination with UNOPS/KEK and are not universally fixed at 1 meter outside each facility.Existing utilities may be used at agreed connection points where confirmed by UNOPS/KEK. However, the Contractor remains responsible for all temporary services and resources required to execute, test and commission the Works, unless otherwise stated in the Contract. This includes the operational chemicals and consumables required for pre-commissioning, wet testing, trial runs and Performance Guarantee Tests

New clarification added: Question : Clarification Request 12. Sub-Clause 7.3(c) - Meaning of "sufficient notice" and "without unreasonable delay"  Sub-Clause 7.3(c) requires the Contractor to give "sufficient notice" before covering up completed Works, and the Employer's Representative to inspect "without unreasonable delay" or notify the Contractor that inspection is not required. Neither standard is quantified, unlike other provisions of the Conditions of Contract (for example, the 30-day period in Sub-Clause 7.2(d)).  Could the Employer please clarify what period of notice is considered "sufficient" for the Contractor's obligation under Sub-Clause 7.3(c), and what period constitutes inspection "without unreasonable delay" for the Employer's Representative's obligation under the same Sub-Clause?Answer :  No fixed number of days applies to either period under Sub-Clause 7.3(c). The Contractor must give notice sufficiently in advance of covering up the Works to allow the Employer’s Representative to arrange the inspection, including any required security access to the Site. Upon receiving that notice, the Employer’s Representative must inspect without unreasonable delay or notify the Contractor that inspection is not required. The timing will depend on the Works to be inspected and the arrangements needed for access. Sub-Clause 7.3(c) remains unchanged.Question : Clarification request 30. Schedule of Details - outstanding material commercial provisions  We thank UNOPS for its response to Query 3 and have reviewed the RFP Particulars, Annex A and Annex B against each Schedule of Details placeholder, together with the clarifications issued to date. A number of the provisions identified in Query 3 now appear to be addressed, at least indicatively: - the Time for Completion for the whole of the Works and by Section (Sub-Clause 1.1) - the Defects Notification Period (Sub-Clause 1.1) - the Bank Guarantee for performance (Sub-Clause 4.2) - the percentage deduction for Retention (Sub-Clause 14.3), and - the currency of payment (Sub-Clause 14.15). However, the following items identified in Query 3 do not appear to be addressed anywhere in the Particulars, Annex A or Annex B, or in any clarification issued to date, and remain, on the face of the documents, unquantified: - the Right of Access to Site date (Sub-Clause 2.1), beyond the general phased-access description of the two site zones; - Working Hours (Sub-Clause 6.5), beyond the general statement that the plant operates on a continuous 24/7/365 basis; - the Delay Damages rate under Sub-Clause 4.13; - the Delay Damages rate (amount per day/week/month) under Sub-Clause 8.7, and any associated cap; - the Percentage Rate for Provisional Sum Items (Sub-Clause 13.5); - the specific dates for the Contractor's care of the Works outside the Date of Contract (Sub-Clause 17.2); - the amount of the aggregate limit of liability (Sub-Clause 17.6); and - the place of arbitration (Sub-Clause 20.6). All of the above provisions are material to the pricing and risk allocation of any proposal. Missing, indicative or any form of non-binding figures are not sufficient for this purpose. Offerors must price on a fixed, binding basis, and any figure left open or subject to change after proposal submission would prevent a like-for-like comparison of proposals and expose offerors that priced conservatively to a competitive disadvantage. In light of the above, could UNOPS please clarify the following: (a) (a) Could UNOPS please issue a consolidated Schedule of Details specifying the binding particulars for all outstanding items? (b) If any items are to remain unresolved at the proposal submission deadline, could UNOPS please confirm when they will be finalised? (c) For any unresolved items, are Bidders expected to make pricing assumptions? If so, please clarify whether and where these must be declared? (d) If the final particulars differ materially from Bidders’ declared pricing assumptions, will price revisions before award or Contract Price adjustments after signature be permitted? If so please specify the method for calculating and approving the price increase? (e) [Question regarding the place of arbitration] Please issue the completed particulars and any necessary amendments sufficiently before the proposal submission deadline to allow offerors to reflect them in their proposals, extending the deadline where necessary.Answer : The completed Schedule 1 [Schedule of Details] was  issued with the updated Section III: Conditions of Contract by amendment . It  reflects the values already published in the tender. Please refer to updated document. Question : 31.Could the Employer please clarify is the Contractor entitled to an adjustment of the Contract Price under Sub-Clause 13.1 [Right to Vary] and an Extension of Time under Sub-Clause 8.4 [Extension of Time for Completion] in the following cases: -if the geodetic survey is not available prior to the tender submission deadline, as the survey is being carried out in parallel with the tender process and will only become available after tender submission, subsequently requiring changes to the tender design and/or technical proposal -if requested technical and/or process related information for the preparation of the tender is not available prior to the tender submission deadline, subsequently requiring changes to the tender design and/or technical proposal.Answer: A separate contractor is responsible for conducting the geodetic survey and assisting in the preparation of the Environmental Impact Assessment (EIA) and property documentation. They also coordinate the necessary documentation from KEK and the Municipality of Obiliq. This work is crucial for applying to the Ministry of Environment and Spatial Planning for Construction Conditions, aiming to streamline the construction permit process after the detailed design phase.As outlined in the tender documents, the available survey and related documentation will be provided to the chosen bidder for detailed design. Providing this information post-tender submission does not alter the tender requirements or justify a change in the Contract Price or an Extension of Time.Question : 1. Extent of rehabilitation of existing open collectors. Based on the Tender Documents, the Tenderer understands that the works related to the existing open wastewater collectors concern the Northern Collector (approx. 1,000 m) and Southern Collector (approx. 745 m) within the TPP Kosovo B area. Please confirm the exact limits and lengths of the existing open collectors to be cleaned, rehabilitated and/or reconstructed, and specifically clarify whether the common downstream open wastewater collector leading towards the Sitnica River is also included in the Contractor's scope.Answer : The scope includes approximately 1,000 meters of the Northern open collector and about 800 meters of the Southern open collector within the TPP Kosovo B area. Based on the conditions observed during site visits, bidders are required to evaluate and propose necessary works, which may include cleaning, slope or bank protection on both sides of the collectors, and concrete lining as needed. These works should be part of the bidder’s technical proposal. The downstream or parallel open collector leading to the Sitnica River is excluded from the Contractor’s scope.

New clarification added: Question : Separation of drainage wastewater streams It is described that presently the Rainwater/chemical neutral water network transports the following wastewater fractions - Stormwater run-off from from ESP, boiler, parking and other areas – WWTP-C - Stormwater run-off from coal yard – WWTP-C coal yard - Stormwater run-off from HFO unloading area, HFO storage area, safety basin – WWTP-B - Wastewater generated from the sand filters back washing – WWTP-D - Chemically contaminated effluents from regeneration of the demineralization plant exchangers – WWTP-D - Decarbonization and Demineralization plants water basins overflows – WWTP-D - Technological water from drains leakages etc. from the Machine and boiler houses, polluted with lubrication oils, greases etc. – WWTP-B - Cooling tower water overflow/ blow down. Please confirm if the identification and allocation to the respective WWTPs of the individual streams as listed here is correct. Please kindly note that the tender documentation does not clearly specify if the separation and individual capture of these streams at their respective sources as well as the channeling of these streams to their respective future WWTP connection points will be provided or if these works are within the scope of the contractor.Answer : The existing wastewater collection system comprises separate networks for the sludge line, bottom-ash/slurry line, sewage line, and rainwater/chemical-neutral water line. Local cross-connections or mixing may occur, including stormwater entering the sewage network, and shall be verified through flushing, CCTV inspection and other required tests.Rainwater and chemical-neutral streams are currently collected within a common network. HFO-contaminated drainage streams shall be separated and directed to WWTP-B, while rainwater treatment is associated with WWTP-C, including runoff from the coal-yard area.The Contractor shall verify the actual routing, condition and interconnections of the relevant streams during the investigation and design stages.Question :Location of collection points on the TPP site. Please kindly note that the tender documentation does not clearly specify if the collection of wastewater and construction of sewage systems is within the scope of the contractor. In particular if foreseen to be part of the scope of the contractor, a site map where the collection points on the site of the thermal power plant are clearly visible needs to be provided. This includes the exact locations of HFO unloading and storage area as well as pit pumps, oily water pits, DECA and DEMI basins, machine hall, boiler house, FGD location and other relevant points.Answer : This was clarified during the site visits and minutes of meetings attahed to this tender.Question :  WWTP-D – sludge network: Please clarify if it can be assumed for the design that all future streams for WWTP-D that come from the WTP (Water treatment plant) are separated from the Rainwater/chemically neutral water network and will arrive through what is now the Sludge network (presently containing only the sludge fraction of the future inflow to WWTP-D). Please confirm that the Sludge network system has a sufficient capacity to contain all WTP effluents (70 m3/d Sand filter flushing (what is now the sludge network), 50 m3/d Regeneration of DEMI wastewater, 50 m3/d DECA and DEMI overflow wastewater), Moreover please clarify that the wastewater from FGD would be delivered in the same point.Answer : As clarified earlier, the existing sludge line is operational and currently functioning properly. However, its capacity for all future WWTP-D flows cannot be confirmed at this stage.The Contractor shall verify during the investigation and detailed design whether the existing sludge network can accommodate the additional flows from sand filter backwashing, DEMI regeneration and DECA/DEMI overflows, and shall provide any required modifications if necessary.The FGD and WWTP-D are located in the same area/object, and the final connection point for the FGD wastewater shall be confirmed during detailed design.Question : 5.4 Cooling tower overflow: The cooling tower overflow is listed in the Water Balance (Annex I, Figure 3/ Table 1) as a continuous stream of 100 m3/h or 2400 m3/d that is currently draining through the Rainwater/chemically neutral water network. Please confirm that this fraction will not be part of the inflow to WWTP-C in the future.Answer : The cooling-tower overflow is currently discharged through the same network as stormwater. It shall not automatically be assumed as part of the future WWTP-C treatment flow. The Contractor shall assess this stream during design and determine the appropriate solution, including separation, bypass or other suitable routing, in accordance with the Employer’s Requirements and the proposed design.Question : Taxes, Customs Duties and Import Charges. Further to your response to Question 2 dated 29.09.2026, please clarify the exemption procedure, including any certificates, customs documentation or Employer/UNOPS support to be provided for import clearance and application of the exemption.  Please let us know the applicable Incoterm, as well.Answer : Proposals shall be submitted net of customs duties and VAT in accordance with Section I: Instructions to Offerors, Article 19 and the Particulars. Upon request of the Contractor, UNOPS will provide the documentation available to it under the applicable arrangements in Kosovo to support the exemption. The Contractor is responsible for all import and customs formalities, transport, insurance, unloading and storage of Goods to the Site (Sub-Clause 4.16 and Clause 22) and for submitting complete documentation in time. UNOPS provides reasonable assistance under Sub-Clause 2.2. The Contract Price covers Plant and Materials delivered to Site, cleared and installed.Question : Proposal Security Regarding the Proposal Security and its validity, please align the text related to the validity of the Proposal Security. In the article 17 of the Section I: Instructions to Offerors is stated the following: The proposal security shall be in the amount and form specified in the Particulars and shall be: (i) In the same currency as stipulated in Article 18 [Proposal Currency(ies)]; and (ii) Valid for thirty (30) days beyond the proposal validity period prescribed by UNOPS, pursuant to Article 14 [Proposal Validity Period]. However, Form 0.8 – Form for Proposal Guarantee states the following: 3. We understand that this bid securing declaration will expire if we are not the successful bidders, and when one of the following events occurs first: (i) we receive a copy of your notification with the name of the successful bidder; or (ii) twenty-eight days have elapsed after the expiration of our offer. Could you please clarify whether these two provisions are intended to have the same validity period and, if so, align the wording accordingly?Answer : No monetary proposal security is required under this RFP (Particulars – Proposal Security). Offerors shall instead submit Schedule 0.8 [Proposal-Securing Declaration]. Article 17 of Section I applies to a monetary proposal security only and therefore does not apply. The validity of the Proposal-Securing Declaration is as stated in Schedule 0.8

New clarification added: Question : Clarification Request 27. ESP/NOx concurrent project - Extension of Time  Annex A [Terms of Reference], Section 3.3 confirms that a separate ESP/NOx project is under construction on the same site, and that UNOPS anticipates the Works will need to be phased as a result, deferring part of the scope.  Could the Employer please confirm whether the Contractor will be entitled to an extension of time under Sub-Clause 8.4 [Extension of Time for Completion] as a result of this phasing?Answer : The Contractor must consider the expected phasing and interaction with the ongoing ESP/NOx Project in their proposed methodology and schedule. No automatic Extension of Time will be granted based on the phasing outlined in the Tender Documents. However, if the ESP/NOx Project causes an actual delay to the critical path that exceeds the reasonably foreseeable phasing and site restrictions in the Tender Documents, the Contractor may qualify for an Extension of Time under Sub-Clause 8.4, provided they adhere to the relevant contractual notice and claim procedures.Question : Clarification Request 28. Design review turnaround windows - Extension of Time  Annex A [Terms of Reference], Section 4 sets out an indicative design review schedule allocating as little as 1-3 weeks per review stage against 3-8 week design periods.  Could the Employer please confirm whether any delay resulting from the Employer’s Representative exceeding these indicative review periods will be considered attributable to the Employer under Sub-Clause 8.4(a)(iii) [Extension of Time for Completion], thereby entitling the Contractor to an extension of time?Answer : The design review periods in Annex A are indicative. Bidders shall propose their own timelines based on their methodology and programme.The actual review time may vary depending on the quality and completeness of the design submission and the time needed to address review comments.Any entitlement to an Extension of Time will be assessed in accordance with Sub-Clause 8.4 and will not arise automatically because an indicative review period is exceeded.Question : Clarification Request 29. Foreign engineer licensing recognition  Annex A [Terms of Reference], Section 9 requires foreign-licensed engineers performing design sign-off, site supervision, or acting as Engineer of Record to undergo a formal recognition process with the Chamber of Engineers of the Republic of Kosovo before mobilization or design validation.  Could the Employer please confirm the expected duration of this recognition process and whether it can be initiated prior to contract award to avoid delays to mobilization or design approval?Answer : The Employer cannot specify a fixed timeframe for the recognition process, as it is managed by the Chamber of Engineers of the Republic of Kosovo. The processing time may vary based on the completeness of the application and the assessment of individual professional qualifications.According to the legal framework in Kosovo and the Chamber's requirements, foreign engineers must have their professional qualifications formally recognized and obtain a license before engaging in regulated engineering activities in Kosovo, such as design approval, supervision, and Engineer of Record duties.The recognition process can be started at the bidder’s discretion and risk before the contract is awarded to ensure timely mobilization. However, licensing or recognition is not required at the time of bid submission.The successful Contractor must provide proof of an active license/recognition or evidence that a formal application has been submitted to the Chamber before contract signing and mobilization. Full recognition/licensing must be secured before the engineer undertakes any regulated professional engineering activities in Kosovo.Bidders are encouraged to consult directly with the Chamber of Engineers of the Republic of Kosovo for details on the procedure, documentation requirements, and expected processing time. 

New clarification added: Question : Clarification Request 15. Trial run duration: 3 months (V3 Sub-Clause 9.6 and Appendix 3-7) versus 2 months (V3 Sub-Clause 9.8)V3 Technical Specification Sub-Clause 9.6 states that the trial run operation shall cover a period of three (3) months, while Sub-Clause 9.8 refers to the satisfactory conclusion of the "2 months trial run operation". Sub-Clause 9.7.5 further states that performance test "A" is carried out during the third month of the trial run, and Appendix 3-7 (Time Schedule for Works) shows a 3-month test operation period for each plant. Can the Employer confirm that the correct duration of the trial run operation is three (3) months, and that the reference to "2 months" in Sub-Clause 9.8 is a drafting error to be corrected?Answer : Response: Confirmed. The trial run operation for each plant is three (3) months, as stated in V3 Sub-Clause 9.6 and shown in Appendix 3-7. Performance Test “A” is to be carried out during the third month in accordance with Sub-Clause 9.7.5. The reference to “2 months” in Sub-Clause 9.8 is a drafting error and shall read “3 months”. This correction was issued through an addendum.Question : Clarification Request 16. Sub-Clause 10.1 [Taking Over] and the "Taken Over" definition, limb (c) - Timing of the Contractor's application  The "Taken Over" definition in Sub-Clause 1.1, limb (c), requires that all commissioning and testing under Clause 9 has been successfully performed before the Works can be Taken Over, and V3 Technical Specification treats the trial run operation and performance test "A" as part of that Clause 9 testing regime.  Can the Employer confirm whether the Contractor's application for a Taking Over Certificate under Sub-Clause 10.1(b) may only be submitted after the trial run and Test "A" have already concluded successfully, or whether that application may be submitted earlier, with the Employer's Representative's 28-day review period under Sub-Clause 10.1(c) running in parallel with, or overlapping, the remainder of the trial run?Answer : The Contractor is allowed to apply for the Taking Over Certificate before completing the trial run and Performance Test “A”, as long as the application complies with Sub-Clause 10.1(b). The 28-day review period can overlap with the final stages of the trial run and Performance Test “A”. Nonetheless, the Taking Over Certificate will be issued only after the successful completion of the trial run, Performance Test “A”, and all other relevant testing and commissioning requirements outlined in Clause 9.Clarification Request 17. V3 Technical Specification, Sub-Clause 9.9 and Sub-Clause 11.3(a) of the Conditions of Contract - Interaction between the two Defects Notification Period extension mechanisms  V3 Technical Specification Sub-Clause 9.9 provides that the Defects Notification Period ends on the later of 365 days from its start or the date of a satisfactory performance in Test "B", while Sub-Clause 11.3(a) of the Conditions of Contract separately extends the Defects Notification Period where the Works cannot be used for their intended purpose by reason of a defect or damage. Question :   Can the Employer confirm how these two extension mechanisms interact if they apply concurrently (for example, where a physical defect unrelated to Test "B" is notified late in the Defects Notification Period), and confirm whether a failed Test "B" that must be repeated is retested under the Sub-Clause 12.3 [Retesting] procedure of the Conditions of Contract or under a separate procedure?Answer : The two provisions operate independently but can also apply simultaneously. According to V3 Technical Specification Sub-Clause 9.9, the Defects Notification Period concludes either 365 days after it begins or upon the satisfactory completion of Test “B”, whichever is later. If Sub-Clause 11.3(a) is applicable, the Defects Notification Period for the affected works or parts will be extended as specified in that Sub-Clause. Should Test “B” fail, a repeat test must be conducted in line with Sub-Clause 12.3 [Retesting] and the relevant Technical Specification requirements.Question : Clarification Request 18. Two internally inconsistent tables for the duration of the Design Brief stage in the Terms of Reference (Annex A)  Annex A (Terms of Reference) contains two different tables specifying the duration of the Design Brief stage: Table 3 (page 17) states a 4-week design period and a 2-week review period, while the table on page 18 states a 5-week design period and a 1-week review period, both for the same 10%-weighted Design Brief milestone.   Can the Employer confirm which duration is correct, and issue a corrected version of Annex A accordingly?Answer : The Employer confirms that the appropriate timeline for the Design Brief stage is 4 weeks for design preparation and 2 weeks for UNOPS review. The reference on page 18 mistakenly states 5 weeks for design and 1 week for review; this should be understood as 4 weeks for design and 2 weeks for review. Annex A will be updated to reflect this correction.Question : Clarification Request 25. Terms of construction and construction permit costs  Annex A [Terms of Reference], Section 3.4 provides that, in the absence of an approved Regulatory Plan for the area, the Contractor will be responsible for obtaining both the Terms of Construction and the Construction Permit, on a per-building basis.   Could the Employer please clarify who bears the costs of obtaining the Terms of Construction and the Construction Permit - the Contractor or the Employer?Answer : As previously clarified, the statutory fees for the Terms of Construction and Construction Permit are expected to be covered by the Beneficiary, KEK, as these fees are identified as the responsibility of the Beneficiary/Employer. The Contractor is responsible for preparing all necessary design and technical documentation, submitting and supporting the applications, and advancing the process to obtain the Terms of Construction and the Construction Permit Question : Clarification Request 26. Contractor's entitlement to Contract Price adjustment and Extension of Time if the finalized ESIA changes the design scope.  Annex A [Terms of Reference], Section 1.1 confirms that the updated ESIA is being conducted separately by a consultant engaged by UNOPS and will be made available to the selected Contractor only once complete.  Could the Employer please clarify is the Contractor entitled to an adjustment of the Contract Price under Sub-Clause 13.1 [Right to Vary] and an Extension of Time under Sub-Clause 8.4 [Extension of Time for Completion] if the finalized ESIA requires a change to the design scope?Answer : If the finalized ESIA necessitates changes beyond the Contractor's current contractual obligations, these changes may be issued as a Variation under Sub-Clause 13.1. Any adjustments to the Contract Price will be managed according to Clause 13. If the Variation impacts the critical path and causes delays in completion, the Contractor may qualify for an Extension of Time under Sub-Clause 8.4, provided the relevant contractual procedures are followed. No adjustments to the Contract Price or Extension of Time will be applicable if the ESIA requirements are already included in the Contractor's existing responsibilities under the Contract.

New amendment added #4: This Amendment forms an integral part of RFP/2026/63431 in accordance with Section I: Instructions to Offerors, Article 3 [Amendments to the RFP]. Where this Amendment differs from any earlier RFP document, amendment or clarification, this Amendment prevails.The revised documents listed below are published in the Documents tab of the UNOPS eSourcing system and supersede all earlier versions. Offerors shall prepare their proposals on the basis of the revised documents and shall acknowledge this Amendment in Schedule 0.11 [Acknowledgement of the Addenda].All other terms and conditions of the RFP remain unchanged.Amendment Overview : Tender Submission Deadline Extended: The deadline for submission of proposals has been extended from Monday, 26 October 2026 to Thursday, 26 November 2026, 11:00 UTC (12:00 Kosovo time). The proposal validity period stated in the Particulars runs from the revised deadline. Clarification Deadline Extended: The deadline for requests for clarification has been extended to Wednesday, 14 October 2026. Requests received after this time will not be answered. Base Date: For the purposes of Section III – Conditions of Contract, the Base Date is Thursday, 29 October 2026, being 28 days before the deadline for submission of proposals. Performance Security: The Bank Guarantee for performance shall be 5% of the Contract Price, in EUR, delivered within fourteen (14) days after the Date of the Contract, and shall be reduced to 2.5% of the Contract Price upon the issue of the Taking-Over Certificate for the whole of the Works, remaining valid until the expiry of the Defects Notification Period; this supersedes the performance security provisions stated in the clarifications of 3 September 2026 and 16 September 2026. Preliminary Topographic Survey: UNOPS informs prospective bidders that the topographic and geodetic survey of the Kosovo B Thermal Power Plant site is currently ongoing.Two preliminary drawings, with and without orthophoto, are being shared to assist bidders in better understanding the terrain configuration, existing infrastructure, and site conditions. These drawings provide an overview of terrain elevations, buildings, roads, railway, belt conveyors, and identified wastewater networks, including rainwater, bottom ash, chemical neutral, and sludge networks.The drawings are provided for information purposes only. The final survey documentation will be made available to the awarded Contractor for detailed design. Bidders remain responsible for site verification in accordance with the Employer's Requirements.Updated Tender Documents.  The following documents have been updated in the Documents tab and supersede all earlier versions:Section III – Conditions of Contract (Update 1): Particular Conditions added to Sub-Clauses 1.1 [definition of "Unforeseeable"], 4.6, 4.7, 4.12, 4.13(b)–(c), 5.1(a), 5.2(c) and 9.1, and Schedules 1 to 17 completed with the Employer's details. Offerors are requested to review the full document. Annex A – Terms of Reference (Update 2): the note "(all 19 drawings MISSING — not in project files)" on page 4 has been deleted. All Drawings and attachments are fully present in the attached employer requirements; Additionally,  the arrangement plan reference for WWTP-D has been corrected from V5_3_7 to V5_3_6; Section IV – Returnable Schedules (Update 2): Form 3.0 [Performance Security Form] amended to 5% of the Contract Price, in EUR.  Text - and shall be reduced to 2.5% of the Contract Price upon the issue of the Taking-Over Certificate is added. Volume 3 – Technical Specification, Section 9.8: "2 months trial run operation" corrected to "3 months trial run operation". Appendix 3-A – Mechanical Requirements: minimum dry film thickness corrected from "200mm" to "200 μm" in Section 5.5.5 and from "75m" to "75 μm" in Section 5.5.3.Additional Document attached to the tender : Kosovo B Thermal Power Plant – Survey  measures_Infrastructure of the SiteAdditional Document attached to the tender  :  Kosovo B Thermal Power Plant – Survey measures_Infrastructure of the Site (Without Orthophoto)Second Site Visit Minutes: The minutes of the second mandatory site visit held on 25 September 2026 have been uploaded in the Documents tab.Please note that the removed requirements/specifications are marked with strikethrough, while the newly added requirements have been highlighted in red. Offerors shall acknowledge this amendment in Schedule 0.11 [Acknowledgement of the Addenda]. UNOPS advises all offerors to review the published amendment carefully and remain up to date with the tender documentation.

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.