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PROCUREMENT OPPORTUNITY

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

Carmarthenshire County Council · compiled

Tender information last checkedLast checked 29 Sept 2026, 18:41.

Opportunity overview

** 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.

Awarded to

Amounts belong to published awards or contracts. Where several suppliers share one value, it is labelled as shared and is not a supplier-specific allocation.

ExCAL Limited

Match pending…
Contract value
£198.5k
Awarded
Not supplied
Contract signed
31 Jan 2022
Award ID
005321-2022-1
Status
active
Location
Ammanford, UK, SA183SJ, United Kingdom

ExCAL Limited

Match pending…
Shared contract value
£337.4k
Awarded
Not supplied
Contract signed
31 Jan 2022
Suppliers
One of 2 awarded suppliers
Award ID
083620-2025-project_48026-1
Status
active
Location
Ammanford, UKL14, SA18 3SJ, United Kingdom

ExCAL Limited

Match pending…
Shared contract value
£337.4k
Awarded
Not supplied
Contract signed
31 Jan 2022
Suppliers
One of 2 awarded suppliers
Award ID
083620-2025-project_48026-1
Status
active
Location
Ammanford, UKL14, SA18 3SJ, United Kingdom

Classification

  • CPV90730000 — Pollution tracking and monitoring and rehabilitation
  • CPV45232430 — Water-treatment work
  • CPV65120000 — Operation of a water-purification plant
  • CPV90000000 — Sewage, refuse, cleaning and environmental services
  • CPV90500000 — Refuse and waste related services
  • CPV90700000 — Environmental services
  • CPV90710000 — Environmental management
  • CPV90720000 — Environmental protection
  • CPV90732000 — Services related to soil pollution
  • CPV90733000 — Services related to water pollution
  • CPV90740000 — Pollutants tracking and monitoring and rehabilitation services

Lots

  • 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.Value not stated

Published notice details

Additional information from the published procurement release. Fields appear only when supplied by the source; check the original notice and tender documents before acting.

Scope, procedure and submissions

Id
ocds-h6vhtk-02e38c
Status
complete
Has Recurrence
No
Procurement Method
open
Main Procurement Category
services
Procurement Method Details
Open procedure

Covered By

GPA

Bid Opening

Date
25 Oct 2021, 10:00
Description
Carmarthenshire County Council officers

Address

Street Address
Carmarthenshire County Council Offices, Carmarthen

Legal basis

Id
32014L0024
Scheme
CELEX

Expected award period

Starts
25 Oct 2021, 10:00

Tender Period

Ends
22 Oct 2021, 14:00

Contract terms

Performance Terms
As detailed within the tender documentation.

Classification

Id
90730000
Scheme
CPV
Description
Pollution tracking and monitoring and rehabilitation

Submission terms

Languages

en
cy

Bid Validity Period

Duration In Days
120

Submission Method

electronicSubmission

Other Requirements

Requires Staff Names And Qualifications
Yes

Lots and requirements

Entry 1
Id
1
Status
cancelled
Has Options
No
Has Renewal
Yes
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.

Renewal

Description
Option to extend for an additional 12 months.

Award criteria

Criteria

Criterion 1
Name
Technical
Type
quality
Description
30
Criterion 2
Type
price
Description
70

Contract period

Duration In Days
1,440

Submission terms

Variant Policy
notAllowed

Items and delivery

Item 1
Id
1
Related Lot
1

Delivery Location

Description
Nant-y-Caws Landfill Site Phase 1 Nant-y-Caws Carmarthen SA32 8BG

Delivery locations

Entry 1
Region
UKL14
Entry 2
Region
UKL14
Entry 3
Region
UKL14

Additional Classifications

Entry 1
Id
90000000
Scheme
CPV
Description
Sewage, refuse, cleaning and environmental services
Entry 2
Id
90500000
Scheme
CPV
Description
Refuse and waste related services
Entry 3
Id
90710000
Scheme
CPV
Description
Environmental management
Entry 4
Id
90720000
Scheme
CPV
Description
Environmental protection
Entry 5
Id
90732000
Scheme
CPV
Description
Services related to soil pollution
Entry 6
Id
90733000
Scheme
CPV
Description
Services related to water pollution
Entry 7
Id
90740000
Scheme
CPV
Description
Pollutants tracking and monitoring and rehabilitation services
Entry 8
Id
45232430
Scheme
CPV
Description
Water-treatment work
Entry 9
Id
90700000
Scheme
CPV
Description
Environmental services
Entry 10
Id
65120000
Scheme
CPV
Description
Operation of a water-purification plant

Published documents

Entry 1
Id
economic
Document Type
economicSelectionCriteria
Entry 2
Id
technical
Document Type
technicalSelectionCriteria

Buyer, suppliers and contacts

Organisation 1
Id
GB-FTS-1552
Name
Carmarthenshire County Council

Roles

buyer

Address

Region
UKL14
Locality
Carmarthen
Postal Code
SA31 1JP
Country Name
United Kingdom
Street Address
County Hall

Details

Classifications

Entry 1
Id
REGIONAL_AUTHORITY
Scheme
TED_CA_TYPE
Description
Regional or local authority
Entry 2
Id
01
Scheme
COFOG
Description
General public services

Identifier

Legal Name
Carmarthenshire County Council

Contact

Name
Diane Thomas
Telephone
+44 1267234567
Organisation 2
Id
GB-FTS-111
Name
High Court

Roles

reviewBody

Address

Locality
London
Postal Code
WC2A 2LL
Country Name
United Kingdom
Street Address
Royal Courts of Justice, The Strand

Identifier

Legal Name
High Court

Contact

Telephone
+44 2079477501
Organisation 3
Id
GB-FTS-45374
Name
ExCAL Limited

Roles

supplier

Address

Region
UK
Locality
Ammanford
Postal Code
SA183SJ
Country Name
United Kingdom
Street Address
ExCAL Limited, ExCAL House Capel Hendre Industrial Estate

Details

Scale
sme

Identifier

Legal Name
ExCAL Limited
Organisation 4
Id
GB-FTS-169419
Name
ExCAL Limited

Roles

supplier

Address

Region
UKL14
Locality
Ammanford
Postal Code
SA18 3SJ
Country Name
United Kingdom
Street Address
ExCAL Limited, ExCAL House Capel Hendre Industrial Estate

Details

Scale
sme

Identifier

Legal Name
ExCAL Limited
Organisation 5
Id
GB-FTS-169420
Name
ExCAL Limited

Roles

supplier

Address

Region
UKL14
Locality
Ammanford
Postal Code
SA18 3SJ
Country Name
United Kingdom
Street Address
Excal House, Capel Hendre Industrial Estate

Details

Scale
sme

Identifier

Legal Name
ExCAL Limited

Award information

Award 1
Id
005321-2022-1
Status
active

Suppliers

Supplier 1
Id
GB-FTS-45374
Name
ExCAL Limited

Related lots

1
Award 2
Id
083620-2025-project_48026-1
Title
Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation
Status
active

Suppliers

Supplier 1
Id
GB-FTS-169419
Name
ExCAL Limited
Supplier 2
Id
GB-FTS-169420
Name
ExCAL Limited

Related lots

1

Contracts and changes

Entry 1
Id
005321-2022-1
Status
active
Award ID
005321-2022-1
Date Signed
31 Jan 2022, 00:00

Value

Amount
198,506.4
Currency
GBP
Entry 2
Id
083620-2025-project_48026-1
Title
Nant-y-Caws Landfill Site Phase 1 Leachate Effluent Treatment Plant Operation
Status
active
Award ID
083620-2025-project_48026-1
Date Signed
31 Jan 2022, 00:00

Items

Item 1
Id
1
Related Lot
1

Classification

Id
90730000
Scheme
CPV
Description
Pollution tracking and monitoring and rehabilitation

Delivery Location

Description
Nant-y-Caws Landfill Site Phase 1 Nant-y-Caws Carmarthen SA32 8BG

Delivery locations

Entry 1
Region
UKL14

Additional Classifications

Entry 1
Id
90000000
Scheme
CPV
Description
Sewage, refuse, cleaning and environmental services
Entry 2
Id
90500000
Scheme
CPV
Description
Refuse and waste related services
Entry 3
Id
90710000
Scheme
CPV
Description
Environmental management
Entry 4
Id
90720000
Scheme
CPV
Description
Environmental protection
Entry 5
Id
90732000
Scheme
CPV
Description
Services related to soil pollution
Entry 6
Id
90733000
Scheme
CPV
Description
Services related to water pollution
Entry 7
Id
90740000
Scheme
CPV
Description
Pollutants tracking and monitoring and rehabilitation services
Entry 8
Id
45232430
Scheme
CPV
Description
Water-treatment work
Entry 9
Id
90700000
Scheme
CPV
Description
Environmental services
Entry 10
Id
65120000
Scheme
CPV
Description
Operation of a water-purification plant

Value

Amount
337,443
Currency
GBP

Period

Duration In Days
1,740

Amendments

Entry 1
Id
1
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.
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.

Recorded locations

  • Buyer location · Carmarthen · UKL14 · SA31 1JP · United Kingdom
  • Delivery location · UKL14

Notice and amendment history

1 published notice version reviewed by ProcuraAxis.

1 VERSION
  1. ocds-h6vhtk-02e38c-2025-12-17T09:26:04Zcompiled ·