---
title: "OPA T835 Seismic Monitoring Plumley, Cheshire."
ocid: "ocds-h6vhtk-078f08"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-078f08"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-078f08.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-078f08.json"
source: "Find A Tender Service"
current_stage: "Tender"
buyer: "The Oil and Pipelines Agency"
published: "2026-10-23"
---

# OPA T835 Seismic Monitoring Plumley, Cheshire.

Buyer: The Oil and Pipelines Agency  
Current stage: Tender  
OCID: ocds-h6vhtk-078f08

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## Summary

The Oil and Pipelines Agency is seeking a supplier to design and implement seismic monitoring at its Plumley petroleum storage depot in Knutsford, Cheshire. The work is described as delivering and implementing a seismic monitoring design report, covering geophysical and scientific prospecting services (CPV 71351000). The requirement is for one package of services at the Plumley site, rather than separate lots. Suppliers in seismic monitoring, geophysical surveying and related scientific prospecting should consider whether they can undertake the design and implementation work at this location. The agency is the buying organisation, and delivery is in Cheshire.

The buyer invited offers through an open procedure. Bids were to be submitted electronically in English. The buyer set 16 November 2026 at 12:00 for enquiries and 23 November 2026 at 12:00 for bid submission; the stated award decision date was 17 December 2026. The contract period was set to run from 30 December 2026 to 30 June 2027, with a possible extension to 31 October 2027; renewal is provided for to accommodate surveys at various locations. The estimated value is £300,000 excluding VAT (£3.6 million including VAT). Price, on a firm fixed-price basis, and health, safety, environment and quality (HSEQ) are weighted equally at 50% each. Full indemnity insurance is required. The contract terms use NEC3 Option A.

The opportunity is marked as suitable for small and medium-sized enterprises, so specialist smaller firms may be able to compete for the single package. It is best suited to suppliers able to produce a seismic monitoring design and put that design into operation at a petroleum storage site, with the technical capability to carry out geophysical or related scientific prospecting work. Bidders need to be able to provide full indemnity insurance. HSEQ performance forms half of the evaluation, alongside firm fixed price, making a credible approach to health, safety, environmental management and quality important in a competitive bid. The contract may involve surveys at various locations, so suppliers should be able to accommodate work beyond the initial site through an extension if required. The stated contract terms are NEC3 Option A.

## Notice

OPA T835 Deliver and implement a seismic monitoring design report at OPA PSD Plumley, Knutsford in Cheshire. For more information about this opportunity, please visit the eSourcing portal at: https://opa.delta-esourcing.com/tenders/UK-UK-Gosport:-Geological%2C-geophysical-and-other-scientific-prospecting-services./S79V463G28 To respond to this opportunity, please click here: https://opa.delta-esourcing.com/respond/S79V463G28

### Lot Information

Lot 1

Renewal: Various locations are to be surveyed hence may require extensions

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/100505-2026 |
| Notice type | UK4 - Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 23 Oct 2026 |
| Submission deadline | 23 Nov 2026 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 30 Dec 2026 - 30 Jun 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £300,000 |
| Lots value | £300,000 |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Active |
| Lots status | Active |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | The Oil and Pipelines Agency |
| Locality | GOSPORT |
| Postcode area | Portsmouth |
| Postcode | PO12 1AP |
| Country | England |
| ITL 1 | TLJ South East (England) |
| ITL 2 | TLJ3 Hampshire and Isle of Wight |
| ITL 3 | TLJ35 South Hampshire |
| Local authority | Gosport |
| Electoral ward | Forton |
| Westminster constituency | Gosport |
| Delivery location | TLD63 Cheshire West and Chester |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71351000 - Geological, geophysical and other scientific prospecting services

## Release History

- 23 Oct 2026 at 13:44 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/100505-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/100505-2026
  23rd October 2026 - Tender notice on Find a Tender

## Notice URLs

- https://opa.delta-esourcing.com/respond/S79V463G28
- https://opa.delta-esourcing.com/tenders/UK-UK-Gosport:-Geological%2C-geophysical-and-other-scientific-prospecting-services./S79V463G28
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-078f08. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-078f08.json.