Last reviewed: 13 November 2026
A spill kit and a bunded pallet both help control liquid spills, but they do very different jobs. One is there when something goes wrong; the other is intended to stop a leaking container from releasing liquid into the workplace in the first place. Good spill containment begins by understanding that difference.
Whether you run a workshop, warehouse, transport depot or manufacturing site, the right combination depends on which liquids you handle, how they are stored and where they could travel if released.
Start by finding the likely escape routes
Walk through the site and look at liquid deliveries, transfer areas, drums, intermediate bulk containers (IBCs), machinery and waste storage. A damaged drum valve may release liquid slowly; a hose failure during transfer may create a much larger spill. On a sloping yard, even a small release may reach a surface-water gully quickly.
Identify which drains are surface water and which are foul or combined drainage. Their discharge routes matter. In England, GOV.UK pollution-prevention guidance explains why storing and moving liquids requires controls that prevent escapes to land and water. Requirements differ elsewhere in the UK.
Primary containment and secondary containment
Primary containment is the tank, drum, pipe or other container holding the liquid. Secondary containment is a backup measure such as a bund or suitably designed spill pallet, intended to retain an escape if the primary container fails.
Drip trays suit small, predictable leaks beneath machines, taps or service areas. They should be chemically compatible, large enough for the likely release and emptied before they overflow. They are not automatically a substitute for a legally required storage bund.
Bunded pallets and containment platforms can help protect stored drums or IBCs. Capacity, loading limits, container layout and the liquid's compatibility with the bund material all need checking. Where oil-storage regulations apply, required containment capacity is not simply a matter of choosing the nearest standard-sized pallet: the legal and site-specific requirements must be assessed.
What absorbents are for
Absorbents collect or contain released liquid that remains accessible after it has escaped, while socks and booms can help stop spreading. They are useful for smaller, manageable incidents, but they do not repair a leaking pipe or replace good storage design.
Choose the absorbent by the liquid, not only by colour. Oil-only materials are intended for many oils and fuels; general purpose grades are used for a range of ordinary water-based and oily liquids; chemical absorbents are designed for specified hazardous chemical applications. Compatibility must be confirmed before use, especially with reactive or unidentified substances.
Where spill kits fit into the plan
A spill kit makes appropriate response materials easy to find. It may contain pads, socks, bags, gloves and instructions, although actual contents vary by model. The kit should match foreseeable spills, including their volume and location, and be placed where trained staff can reach it safely.
Sites with different hazards may need separate oil-and-fuel and chemical kits rather than one generic kit. Storage points, loading bays and external yards may also require drain covers as part of an authorised emergency procedure. A drain cover can be useful, but it is not suitable for every drain shape, chemical or flow condition.
Putting together a practical containment system
- List the liquids, their hazards, storage volumes and likely release points.
- Fix preventable leaks and improve primary containment before relying on clean-up equipment.
- Provide appropriately sized and compatible secondary containment where needed.
- Place absorbents and spill kits near foreseeable incidents without obstructing safe access.
- Train staff to distinguish manageable spills from incidents requiring evacuation or specialist response.
- Inspect bunds, trays, valves and kit contents, and record the corrections made.
Don't forget the waste
Contaminated absorbents, recovered liquids and residue from a bund may need different waste routes. Keep incompatible materials apart and have the waste assessed and classified before collection. Never assume that a liquid becomes safe for a drain merely because a pad or granule has been used on it.
The most reliable approach combines prevention, containment and response. If a site relies entirely on spill kits, it is probably overlooking opportunities to stop leaks before they occur.