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Call: 01179 820025
Call: 01179 820025
Penarth heights, Cardiff
Permeable Reactive Barrier (PRB) Decommissioning, South Eastern UK


Pharmaceutical Sector

Permeable Reactive Barrier (PRB) Decommissioning, South Eastern UK

Client: Pharmaceutical Sector
Date: 2019 – 2020
Nature of works: Permeable Reactive Barrier (PRB) Decommissioning
Contract Value: £600k

Soilfix were contracted to carry out the decommissioning of Europe’s longest Permeable Reactive Barrier (PRB) at a former pharmaceutical manufacturing plant.

The Challenge
An 800m long PRB was installed directly adjacent to a live railway along the site boundary in 2000, prior to the cessation of site operations activities in 2013.  The system was designed to treat a suite of groundwater contaminants of concern and reduce the potential for their off-site migration while site-wide remediation works were carried out.

Following confirmation that groundwater quality had improved to an acceptable standard, the PRB became redundant and required decommissioning in a safe, sustainable and cost-effective manner.

Our Solution
Soilfix designed and implemented a multi-disciplinary decommissioning scheme, including:

  • Dewatering, excavation and breakout of 22nr. concrete treatment chamber caissons housing the GRP treatment vessels;
  • Dewatering, cleaning and removal of equipment from 20nr. further recharge chambers;
  • Pumping of 300 tonnes of spent granular activated carbon (GAC) from treatment vessels and removal off-site for sustainable regeneration;
  • High-pressure cleaning of caissons, cutting of pipework /infrastructure and grouting all inlets under confined-space entry procedures;
  • Safe lifting and high-pressure cleaning of the GRP treatment vessels prior to off-site disposal once rendered ‘environmentally clean’;
  • Breaking through the low-permeability barrier to re-establish groundwater flow at 19 locations;
  • Import/placement of clean permeable backfill to meet the client’s strict compliance criteria;
  • Disposal of all soils, contaminated liquids/sediments off-site under full Duty of Care; and,
  • Health, Safety & Environmental controls to meet the client’s exacting standards.

All works were completed on programme and to budget, with zero lost-time incidents/accidents, in spite of significant hazards including solvent contamination, confined space entry, temporary works, lifting operations and the adjacent live railway.

  • Published: 10/02/2021
  • Service: Decommission, Health & Safety
  • Client: Pharmaceutical Sector

Our Contacts

  • Main Office: 10 St. Martins Ind. Park, Avonmouth, Bristol, BS11 0RS
  • Phone: 01179 820025
  • E-mail: info@soilfix.co.uk

We have a dedicated and highly knowledgeable team lying close to Greater London in Rayleigh, Essex.

They are more than willing to assist you in any way possible, so feel free to call them with any questions or queries you may have on 01268 502272.

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