Bund Inspection & Maintenance

The Control of Pollution (oil storage) Regulations 2001 requires that secondary containment (bunds) must have the integrity and capacity to contain a spill or leak should one occur. PPG 2 outlines that such bunds must be sound and they must be impermeable to oil and water.

Ensure bund integrity with our bund inspection and maintenance service

The Control of Pollution (oil storage) Regulations 2001 requires that secondary containment (bunds) must have the integrity and capacity to contain a spill or leak should one occur. PPG 2 outlines that such bunds must be sound and they must be impermeable to oil and water.

What is a bund

An enclosure designed to hold at least 110% of the contents of a liquid storage vessel.  Bunds are usually made of concrete, masonry or metal, but the material must be impermeable to the liquid being stored.

Regulatory controls

  • Control of Pollution Act 1991
  • Control of Pollution (Oil Storage) (England) Regulations 2001
  • COMAH Regulations 1999
  • Dangerous Substances and Explosive Atmospheres Regulations 2002
  • Control of Substances Hazardous to Health Regulations 2002
  • PPG 2 Above Ground Oil Storage Tanks

Principles of the regulation

  • Capacity – 110% of tank volume Or for multiple tanks in one bund, 110% of the largest or 25% of total whichever is the greater
  • Impermeable to the liquid it contains
  • Structurally sound
  • No penetrations through bund walls or base
  • No drains
  • Positive action pump to dewater bund
  • Clearance of 0.75m between bund wall and tank.

To ensure bund integrity, imperviousness to liquid contents and that they form an effective part of the PIRP, it is essential that they are inspected regularly and that any defects identified in the bund wall or lining are repaired promptly. It is imperative that any draw-off or fill pipes that pass through the bund wall are adequately sealed. It is also important that they are regularly emptied and cleaned to maintain the bund capacity.

We offer a service to inspect your bunded areas in line with regulations to ensure they are impermeable to water.

The remedies we offer include:

Visual Inspection

  • A thorough visual inspection of bunds on site identifying presence of faults
  • Compliance observations

Bund integrity testing

  • Structural integrity
  • Report detailing test results together with recommended remedial measure options

Bund servicing and cleaning

  • Dewatering of the bund (through filter packs if contaminants are present)
  • Full clean down using degreasing agents

Bund relining

  • Installation of protective linings to new concrete bunds and/or to refurbish and re-line existing bunds in line with the required regulations.  
  • Our survey and installation teams will assess the problem and provide an economic solution

To discuss our bund maintenance services in greater detail please contact us on 0800 0370 899 or complete the form below

Get In Touch With Darcy

Contact us today to get expert help from one of our environmental experts.


Complete the form or call us on 0800 0370 899
alternatively email us directly at sales@darcy.co.uk

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