Why Spill Kit Location Is a Legal Requirement, Not Just a Best Practice
Spill kits are a reactive control measure — they exist to deal with spills that have already occurred. But a spill kit stored in the wrong location, inaccessible, or unknown to workers is as useless as having none at all. UK law is explicit that reactive measures must be available, accessible, and fit for purpose. The placement of spill kits is governed by a cluster of regulatory requirements that many sites fail to appreciate — and that HSE and the Environment Agency both inspect during site visits.
The Primary Legal Duties
Several pieces of legislation converge on spill kit placement:
- COSHH Regulation 7(1) — requires adequate control of exposure to hazardous substances. This includes spill response capability for substances that can cause exposure through skin contact or inhalation during a spill event.
- COSHH Regulation 11 — requires emergency arrangements where a failure of a control measure could result in significant exposure. Spill kits are an emergency arrangement under this regulation.
- Management of Health and Safety at Work Regulations 1999, Regulation 8 — requires procedures for serious and imminent danger. A chemical spill constitutes serious and imminent danger; workers must be able to access response equipment immediately.
- Control of Major Accident Hazards (COMAH) Regulations 2015 — for higher-tier sites, spill response equipment locations must be documented in the safety report and on-site emergency plan.
- Environmental Permitting (England and Wales) Regulations 2016 — for permitted sites, spill response capability is typically a specific condition of the environmental permit.
How Many Spill Kits and Where?
There is no single regulation specifying the number of spill kits per site, but HSE guidance and the EA Pollution Prevention Guidance (PPG) series — particularly PPG22: Incident Response — provides the framework. The accepted principles are:
- Proximity principle: A spill kit must be located within the immediate vicinity of any area where a spill is foreseeable. 'Immediate vicinity' is generally interpreted as accessible within 30 seconds of a spill occurring — typically within 10 metres and with no locked doors, stairs, or other barriers between the kit and the spill risk.
- Worst-case sizing: The spill kit must be capable of containing the maximum foreseeable spill from the largest container at the location. For a 1,000-litre IBC, a 20-litre oil-only spill kit is entirely inadequate.
- Substance-specific selection: Oil kits (white absorbents) are ineffective for chemical spills; universal kits are needed for aggressive chemicals. Hydrocarbon-selective pads float on water and are unsuitable for miscible spills.
Spill Kit Placement Reference Table
| Location Type | Recommended Kit Type | Minimum Capacity | Legal Driver |
|---|---|---|---|
| Chemical storage room | Chemical/universal | 110% of largest container | COSHH Reg. 11; EPR 2016 |
| Fuel bunded area | Oil-only | 25% of bund total volume | PPG2; EA permit conditions |
| Vehicle wash / yard | Oil-only + drain cover | 50 litres minimum | PPG13; Water Resources Act 1991 |
| Laboratory | Universal | Largest container × 2 | COSHH Reg. 7 & 11 |
| Workshop (oils/coolants) | Oil-only | 30 litres minimum | PPG8; COSHH Reg. 7 |
| Loading/unloading bays | Universal + drain cover | Volume of largest delivery | COMAH / EPR; PPG22 |
Signage Requirements
Under the Health and Safety (Safety Signs and Signals) Regulations 1996 (SI 1996/341), emergency equipment locations must be signed where there is a risk of a worker not finding them in an emergency. Spill kit cabinets in chemical storage areas must have visible, illuminated (or photoluminescent) signage indicating their location. The sign must be comprehensible to all workers, including non-English speakers — pictograms are required alongside any text.
Training and Awareness Obligations
A correctly placed spill kit is only effective if workers know it exists, know how to use it, and know when to use it versus when to evacuate. COSHH Regulation 12 requires employers to provide suitable information, instruction, and training on the hazards of substances and the procedures to be followed. This must include spill response procedures, use of the spill kit, and waste disposal instructions for contaminated absorbents.
Training must be documented. HSE inspectors regularly ask for training records during COSHH inspections, and absence of records is treated as evidence that training has not occurred.
Inspection and Maintenance of Spill Kits
There is no statutory inspection frequency for spill kits, but failure to maintain them in a usable state could constitute a breach of Regulation 9 (maintenance of control measures). Best practice, consistent with ISO 14001 environmental management requirements, is a documented monthly inspection covering:
- Kit contents complete and undamaged
- Location unobstructed and clearly signed
- Any used items replaced promptly
- Expiry dates checked for specialist absorbents (relevant for acid neutralising granules)
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