Official UK procurement notice
Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation
Authority: Carmarthenshire County Council (Local council)
What is being bought
Published requirement description** THIS IS A CONTRACT AWARD NOTICE, NOT A CONTRACT OPPORTUNITY **
Carmarthenshire County Council is responsible for the safe treatment and disposal of leachate arising from a closed landfill site at Nant-y-Caws, Carmarthen, UK.
The leachate is currently treated via a biological treatment plant prior to discharge to a local river under a Natural Resources Wales issued Permit.
The treatment plant consists of a MBBR (Mobile Bed Biological Reactor) and SAF (Submerged Aerated Filter) that successively treats the leachate to enable consented discharge to the river.
The Council invited tenders for the operation and maintenance of the plant with suitably qualified and technically competent personnel.
The site location and address is:
Nant-y-Caws Landfill Site
Phase 1
Nant-y-Caws
Carmarthen
SA32 8BG
Contract Period: 01/02/2022 to 31/01/2025 with an extension option of up to a further 12 months.
CPV: Environmental management · Environmental protection · Environmental services · Operation of a water-purification plant · Pollutants tracking and monitoring and rehabilitation services · Pollution tracking and monitoring and rehabilitation · Refuse and waste related services · Services related to soil pollution · Services related to water pollution · Sewage, refuse, cleaning and environmental services · Water-treatment work
The lotProcurement structure
single lot · no lot value publishedLot #1The duration of the current Contract, which was due to expire on 31/01/2026, has been…AwardedRenewal
The duration of the current Contract, which was due to expire on 31/01/2026, has been extended by 10 months to enable the full installation of a new denitrification reed bed to reduce nitrate levels and completion of a reed bed permit variation application to Natural Resources Wales.
What it takes to wini
How this buyer will score bids.
The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).
Evaluation split and conditions of participation as published; the tender pack may add morei
How this buyer will score bids.
The evaluation criteria and weights exactly as published on the notice, grouped by family (price, quality, social value and so on).
Published sub-criteria (2)
- Technical: 30%
- price: 70%
Published award criteria (2)
- Technical: 30
- Price: 70
- Staff
- Names and qualifications of delivery staff must be submitted
- Price carries 70 of 100 points: a 10% discount moves about 7 points. This one is won on the number: sharpen the price before polishing the prose.
Price arithmetic assumes straight proportional scoring; the tender pack may use another formula.
Procedure terms & legal framework
From the official record · publisher note attached- Procedure method
- Open procedure
- Legal basis
- CELEX · 32014L0024 Public Contracts Regulations 2015 (Directive 2014/24/EU)
- Procurement category
- Services
- Notice status
- Awarded
- Procurement threshold
- Unspecified in notice
- Regulatory regime
- Standard
- Commercial structure
- Stand-alone contract (no framework)
- Competition type
- Competitive procedure
- GPA / WTO covered
- Yes (GPA)
- Recurring procurement
- No (one-off requirement)
- First published
- 22 Sept 2021, 14:35 BST
- Last source update
- 17 Dec 2025, 09:26 GMT
- Award evaluation window
- 25 Oct 2021 – …
- FTS notice number
2025/S 000-083620- Classification (CPV)
- Delivery area
- Official registry OCID
ocds-h6vhtk-02e38cFind a Tender
- Performance terms
As detailed within the tender documentation.
Publisher note: This tender exercise was advertised on Sell2Wales and administered via the eTenderWales e-tendering portal. The project code was: project_48026 and the ITT code: itt_89372 (WA Ref:158892)
How it was run
Official notice- Submission deadline
- 22 Oct 2021, 14:00 BST
- Submission channel
- {"electronicSubmission"}
- Accepted languages
- en, cy
- Bid validity
- 120 days from the deadline
- Bids opened
- 25 Oct 2021, 10:00 BST
Timeline
22 Oct 2021 → 17 Dec 2025 · 3 dates- Submission deadline22 Oct 2021, 14:00 BST
- Bids opened25 Oct 2021, 10:00 BST
- Notice published312 days ago17 Dec 2025, 09:26 GMT
Notice history
1 event · 3 releases on Find a Tender- Status changed to complete25 Feb 2022, 16:00 GMT
Commercial outcome & contract awards
Published awards, contracts and bid statistics, not a forecast| Awarded to | Value | Date | Status |
|---|---|---|---|
| ExCAL LimitedSME | £198,506 † | — | Awarded |
| ExCAL LimitedSME | £337,443 † | — | Awarded |
Contracts
Contract 005321-2022-1 · ExCAL LimitedSME
- Signed
- 31 Jan 2022
- Value
- £198,506
- Status
- active
Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation · ExCAL LimitedSME
- Signed
- 31 Jan 2022
- Value
- £337,443
- Status
- active
- Change The duration of the current Contract, which was due to expire on 31/01/2026, has been extended by 10 months. The Council, in conjunction with the incumbent plant operator has been required by Natural Resource Wales (NRW) to install a new denitrification reed bed to reduce nitrate levels and ensure the treatment plant does not breach its environmental permit conditions. It is anticipated that all works will be completed by early 2026. However, the process requires on-going input from the incumbent operator (who developed the reed bed) as the reed plants and microbes need a full growing season to mature before they become fully effective at reducing nitrate levels and a reed bed permit variation cannot be sought from NRW until sufficient data has been gathered to support the application. This is likely to be late summer 2026 at the earliest. In addition, additional time will be required to apply and receive approval from NRW., Need for additional works, services or supplies by the original contractor/concessionaire: The term of the Contract is being modified in accordance with Regulation 72(1)(b) of the Public Contracts Regulations 2015 (under which the contract was let) as these are additional works which have become necessary and were not included in the initial procurement. A change of operator at this stage cannot be made for economic and technical reasons due to the requirements of interchangeability or interoperability with existing installations procured under the initial procurement. A change of operator would also cause significant inconvenience and substantial duplication of costs for the Council.
Bid statistics published by the authority
| Bids | SME | VCSE | Valid bid range |
|---|---|---|---|
| 4bids · 4 electronic · 4 from abroad | 4 | — | — |
Contracting authority & participating public bodies
Dispute resolution & review bodies
- High CourtReview body
Bidders & participating suppliers
3 commercial parties on the notice- ExCAL LimitedAwarded supplier
- ExCAL LimitedAwarded supplier
- ExCAL LimitedAwarded supplier
Official documents & specifications (2)
Official links; attachments are not copiedTender pack and attachments
- Economic and financial selection criteria
- Technical selection criteria