Award

Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation

CARMARTHENSHIRE COUNTY COUNCIL

This public procurement record has 2 releases in its history.

AwardUpdate

17 Dec 2025 at 00:00

Award

25 Feb 2022 at 00:00

Summary of the contracting process

The procurement process for the "Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation" initiated by Carmarthenshire County Council involves the operation and maintenance of a biological treatment facility designed to manage leachate from a closed landfill site. Situated in Carmarthen, UKL14, the process falls under the services category, with major classifications including waste treatment and water pollution control (CPV 90730000). Initially set to end on 31 January 2026, the contract was extended by 10 months for additional environmental enhancements, including the installation of a denitrification reed bed. This process is guided through an open procedure with ongoing revisions, driven by environmental compliance requirements set by Natural Resources Wales.

The tender offers a lucrative growth opportunity for businesses specialising in environmental and waste management services, particularly those with expertise in biological treatment technologies. As underscored by the selection of ExCAL Limited as the supplier, the procurement emphasises technical competence in handling complex treatment systems like MBBR and SAF. Small to medium enterprises with experience in similar installations could gain significant business growth as consortia are encouraged, ensuring the amalgamation of substantial technical and operational expertise. The extended contract ensures continued collaboration, presenting long-term commercial and environmental benefits to businesses in the sector.

Find more tenders on our Open Data Platform.
How relevant is this notice?

D3 Tenders Premium

Win More Public Sector Contracts

AI-powered tender discovery, pipeline management, and market intelligence — everything you need to grow your public sector business.

Notice Title

Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation

Notice 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.

Lot Information

Lot 1

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.

Publication & Lifecycle

Open Contracting ID
ocds-kuma6s-107997
Publication Source
Sell2Wales
Latest Notice
https://www.sell2wales.gov.wales/search/search_switch.aspx?ID=107997
Current Stage
Award
All Stages
Award

Procurement Classification

Notice Type
OJEU - F20 - Modification Notice
Procurement Type
Standard
Procurement Category
Services
Procurement Method
Open
Procurement Method Details
Open procedure
Tender Suitability
Not specified
Awardee Scale
SME

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

65 - Public utilities

90 - Sewage, refuse, cleaning and environmental services


CPV Codes

45232430 - Water-treatment work

65120000 - Operation of a water-purification plant

90000000 - Sewage, refuse, cleaning and environmental services

90500000 - Refuse and waste related services

90700000 - Environmental services

90710000 - Environmental management

90720000 - Environmental protection

90730000 - Pollution tracking and monitoring and rehabilitation

90732000 - Services related to soil pollution

90733000 - Services related to water pollution

90740000 - Pollutants tracking and monitoring and rehabilitation services

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
£535,949 £500K-£1M

Notice Dates

Publication Date
17 Dec 20252 months ago
Submission Deadline
Not specified
Future Notice Date
Not specified
Award Date
31 Jan 20224 years ago
Contract Period
Not specified - Not specified
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Complete
Awards Status
Not Specified
Contracts Status
Active

Contracting Authority (Buyer)

Main Buyer
CARMARTHENSHIRE COUNTY COUNCIL
Contact Name
Diane Thomas
Contact Email
ddthomas@carmarthenshire.gov.uk
Contact Phone
+44 1267234567

Buyer Location

Locality
CARMARTHEN
Postcode
SA31 1JP
Post Town
Swansea
Country
Wales

Major Region (ITL 1)
TLL Wales
Basic Region (ITL 2)
TLL4 Mid and South West Wales
Small Region (ITL 3)
TLL42 South West Wales
Delivery Location
TLL14 South West Wales

Local Authority
Carmarthenshire
Electoral Ward
Carmarthen Town North and South
Westminster Constituency
Caerfyrddin

Supplier Information

Number of Suppliers
1
Supplier Name

EXCAL

Further Information

Notice Documents

  • https://www.sell2wales.gov.wales/search/show/search_view.aspx?ID=FEB389924
    Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation - ** 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.
  • https://www.sell2wales.gov.wales/search/show/search_view.aspx?ID=DEC571721
    Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

Download

The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

{
    "tag": [
        "compiled"
    ],
    "id": "ocds-kuma6s-107997-2025-12-17T00:00:00Z",
    "date": "2025-12-17T00:00:00Z",
    "ocid": "ocds-kuma6s-107997",
    "initiationType": "tender",
    "parties": [
        {
            "id": "org-1",
            "name": "Carmarthenshire County Council",
            "identifier": {
                "legalName": "Carmarthenshire County Council"
            },
            "address": {
                "streetAddress": "County Hall",
                "locality": "Carmarthen",
                "region": "UKL14",
                "postalCode": "SA31 1JP"
            },
            "contactPoint": {
                "name": "Diane Thomas",
                "email": "ddthomas@carmarthenshire.gov.uk",
                "telephone": "+44 1267234567"
            },
            "roles": [
                "buyer"
            ],
            "details": {
                "classifications": [
                    {
                        "id": "Regional or local authority",
                        "scheme": "TED_CA_TYPE"
                    },
                    {
                        "id": "01",
                        "description": "General public services",
                        "scheme": "COFOG"
                    }
                ],
                "url": "https://www.carmarthenshire.gov.wales"
            }
        },
        {
            "id": "org-2",
            "name": "ExCAL Limited",
            "identifier": {
                "legalName": "ExCAL Limited"
            },
            "address": {
                "streetAddress": "ExCAL Limited, ExCAL House Capel Hendre Industrial Estate",
                "locality": "Ammanford",
                "region": "UK",
                "postalCode": "SA183SJ"
            },
            "roles": [
                "supplier"
            ],
            "details": {
                "scale": "sme"
            }
        },
        {
            "id": "org-3",
            "name": "High Court",
            "identifier": {
                "legalName": "High Court"
            },
            "address": {
                "streetAddress": "Royal Courts of Justice, The Strand",
                "locality": "London",
                "postalCode": "WC2A 2LL"
            },
            "contactPoint": {
                "telephone": "+44 2079477501"
            },
            "roles": [
                "reviewBody"
            ]
        },
        {
            "id": "org-11",
            "name": "Carmarthenshire County Council",
            "identifier": {
                "legalName": "Carmarthenshire County Council"
            },
            "address": {
                "streetAddress": "County Hall",
                "locality": "Carmarthen",
                "region": "UKL14",
                "postalCode": "SA31 1JP"
            },
            "contactPoint": {
                "name": "Diane Thomas",
                "email": "ddthomas@carmarthenshire.gov.uk",
                "telephone": "+44 1267234567"
            },
            "roles": [
                "buyer"
            ],
            "details": {
                "url": "https://www.carmarthenshire.gov.wales"
            }
        },
        {
            "id": "org-12",
            "name": "ExCAL Limited",
            "identifier": {
                "legalName": "ExCAL Limited"
            },
            "address": {
                "streetAddress": "ExCAL Limited, ExCAL House Capel Hendre Industrial Estate",
                "locality": "Ammanford",
                "region": "UKL14",
                "postalCode": "SA18 3SJ"
            },
            "roles": [
                "supplier"
            ],
            "details": {
                "scale": "sme"
            }
        }
    ],
    "buyer": {
        "name": "Carmarthenshire County Council",
        "id": "org-11"
    },
    "tender": {
        "id": "ocds-kuma6s-107997-tender-158892",
        "title": "Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation",
        "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.",
        "status": "complete",
        "items": [
            {
                "id": "1",
                "additionalClassifications": [
                    {
                        "id": "90000000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "90500000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "90710000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "90720000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "90732000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "90733000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "90740000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "45232430",
                        "scheme": "CPV"
                    },
                    {
                        "id": "90700000",
                        "scheme": "CPV"
                    },
                    {
                        "id": "65120000",
                        "scheme": "CPV"
                    }
                ],
                "deliveryLocation": {
                    "description": "Nant-y-Caws Landfill Site Phase 1 Nant-y-Caws Carmarthen SA32 8BG"
                },
                "deliveryAddresses": [
                    {
                        "region": "UKL14"
                    },
                    {
                        "region": "UKL14"
                    }
                ],
                "relatedLot": "1",
                "classification": {
                    "id": "90730000",
                    "scheme": "CPV"
                }
            }
        ],
        "procurementMethod": "open",
        "procurementMethodDetails": "Open procedure",
        "mainProcurementCategory": "services",
        "documents": [
            {
                "id": "FEB389924",
                "documentType": "awardNotice",
                "title": "Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation",
                "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.",
                "url": "https://www.sell2wales.gov.wales/search/show/search_view.aspx?ID=FEB389924",
                "format": "text/html"
            },
            {
                "id": "DEC571721",
                "documentType": "awardNotice",
                "title": "Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation",
                "url": "https://www.sell2wales.gov.wales/search/show/search_view.aspx?ID=DEC571721",
                "format": "text/html"
            }
        ],
        "lots": [
            {
                "id": "1",
                "description": "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.",
                "status": "complete",
                "awardCriteria": {
                    "criteria": [
                        {
                            "type": "quality",
                            "name": "Technical",
                            "description": "30"
                        },
                        {
                            "type": "price",
                            "description": "70"
                        }
                    ]
                },
                "hasOptions": false,
                "contractPeriod": {
                    "durationInDays": 1440
                }
            }
        ],
        "coveredBy": [
            "GPA"
        ],
        "classification": {
            "id": "90730000",
            "scheme": "CPV"
        },
        "legalBasis": {
            "id": "32014L0024",
            "scheme": "CELEX"
        }
    },
    "awards": [
        {
            "id": "ocds-kuma6s-107997-award-119108-1",
            "suppliers": [
                {
                    "id": "org-2",
                    "name": "ExCAL Limited"
                }
            ],
            "relatedLots": [
                "1"
            ]
        },
        {
            "id": "ocds-kuma6s-107997-award-158892-6",
            "title": "Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation",
            "suppliers": [
                {
                    "id": "org-12",
                    "name": "ExCAL Limited"
                }
            ],
            "relatedLots": [
                "1"
            ]
        }
    ],
    "contracts": [
        {
            "id": "ocds-kuma6s-107997-award-119108-1",
            "awardID": "ocds-kuma6s-107997-award-119108-1",
            "status": "active",
            "value": {
                "amount": 198506.4,
                "currency": "GBP"
            },
            "dateSigned": "2022-01-31T00:00:00Z"
        },
        {
            "id": "ocds-kuma6s-107997-award-158892-6",
            "awardID": "ocds-kuma6s-107997-award-158892-6",
            "title": "Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation",
            "status": "active",
            "period": {
                "durationInDays": 1740
            },
            "value": {
                "amount": 337443,
                "currency": "GBP"
            },
            "items": [
                {
                    "id": "1",
                    "classification": {
                        "id": "90730000",
                        "scheme": "CPV"
                    },
                    "additionalClassifications": [
                        {
                            "id": "90000000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "90500000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "90710000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "90720000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "90732000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "90733000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "90740000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "45232430",
                            "scheme": "CPV"
                        },
                        {
                            "id": "90700000",
                            "scheme": "CPV"
                        },
                        {
                            "id": "65120000",
                            "scheme": "CPV"
                        }
                    ],
                    "deliveryLocation": {
                        "description": "Nant-y-Caws Landfill Site Phase 1 Nant-y-Caws Carmarthen SA32 8BG"
                    },
                    "deliveryAddresses": [
                        {
                            "region": "UKL14"
                        }
                    ],
                    "relatedLot": "1"
                }
            ],
            "dateSigned": "2022-01-31T00:00:00Z",
            "amendments": [
                {
                    "id": "ocds-kuma6s-107997-amendment-158892-6",
                    "description": "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.",
                    "rationale": "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."
                }
            ]
        }
    ],
    "language": "EN",
    "relatedProcesses": [
        {
            "id": "1",
            "relationship": [
                "planning"
            ],
            "scheme": "EU-OJ",
            "identifier": "2022/S 000-005321"
        }
    ],
    "description": "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)",
    "bids": {
        "statistics": [
            {
                "id": "ocds-kuma6s-107997-bidsstatistic-119108-1",
                "measure": "bids",
                "value": 4,
                "relatedLot": "1"
            },
            {
                "id": "ocds-kuma6s-107997-bidsstatistic-119108-2",
                "measure": "smeBids",
                "value": 4,
                "relatedLot": "1"
            },
            {
                "id": "ocds-kuma6s-107997-bidsstatistic-119108-3",
                "measure": "foreignBidsFromEU",
                "value": 4,
                "relatedLot": "1"
            },
            {
                "id": "ocds-kuma6s-107997-bidsstatistic-119108-4",
                "measure": "foreignBidsFromNonEU",
                "value": 0,
                "relatedLot": "1"
            },
            {
                "id": "ocds-kuma6s-107997-bidsstatistic-119108-5",
                "measure": "electronicBids",
                "value": 4,
                "relatedLot": "1"
            }
        ]
    },
    "links": [
        {
            "rel": "canonical",
            "href": "https://api.sell2wales.gov.wales/v1?lang=cy/Notice?id=ocds-kuma6s-107997"
        },
        {
            "rel": "canonical",
            "href": "https://api.sell2wales.gov.wales/v1?lang=cy/Notice?id=ocds-kuma6s-107997"
        }
    ],
    "noticetype": "OJEU - F20 - Modification Notice"
}