Spill Risk Assessments
In the UK, businesses involved in waste oil operations (and any activity where oils, fuels, coolants, chemicals or contaminated liquids are stored, handled or transferred) are subject to strict expectations around spill prevention and management. Failure to control spills can lead to severe legal and commercial consequences, including:
- Fines and penalties for non-compliance with storage and pollution prevention requirements.
- Liability for environmental damage, including clean-up and remediation costs.
- Reputational damage and lost business opportunities following an incident.
To mitigate these risks, it is crucial for operators to conduct thorough spill risk assessments and implement robust spill control measures.
What is a spill risk assessment?
A spill risk assessment is a structured review of where spills could happen, what could be released, how far it could spread, who or what could be harmed, and what controls are needed to prevent a spill and reduce the impact if one occurs. The outcome should be practical: clear actions, assigned responsibilities, and the right equipment positioned where it is genuinely needed.
Why spill risk assessments matter in the UK
Oil storage and pollution prevention requirements vary by UK nation and by the type and quantity of oil stored. For example, GOV.UK guidance explains when business oil storage rules apply and what “good storage” looks like (location, protection, and containment such as bunds/drip trays).
Spill planning is also an expectation under wider health and safety and major hazard frameworks where relevant. HSE guidance highlights the need to plan, provide suitable equipment, and train people to deal with foreseeable emergencies such as spills.
When you should carry out (or update) a spill risk assessment
- Before starting new waste oil or fluid handling activities (new sites, new processes, new equipment).
- When you introduce new substances (for example, different fuels, coolants, cutting fluids, detergents or chemicals).
- After any spill or near-miss (use real events to improve controls).
- After changes to storage layout, drainage, yards/hardstanding, delivery points, or transfer methods.
- At set intervals (commonly annually) as part of planned maintenance and compliance reviews.
Step-by-step: how to run a practical spill risk assessment
1) Identify what could spill
List all liquids that could be released, including waste oil, hydraulic oil, diesel, petrol, lubricants, coolants, cutting fluids, solvents and chemicals. Record where they are stored, typical quantities, maximum quantities, and the containers used (drums, IBCs, tanks, mobile bowsers, day tanks, dosing systems).
2) Map spill sources and “pinch points”
Walk the site and mark common spill points:
- Delivery and decant points (fill connections, vents, overfill risks).
- IBC/drum dispensing areas, pump sets, valves and hoses.
- Workshops, maintenance bays, plant rooms, generators and compressor areas.
- Waste oil collection points and intermediate storage.
- Forklift routes, door thresholds, ramps and yard transfers.
3) Understand pathways to harm (where would it go?)
For each spill point, identify likely pathways:
- Surface water drains, interceptors, ditches, gullies and kerb lines.
- Soil or unmade ground (risk to groundwater and long-term contamination).
- Internal drains, bund valves, sumps and low points.
- Watercourses and sensitive boundaries (neighbours, public access, habitats).
4) Consider scale and consequences
Estimate realistic “credible worst cases” (for example: hose failure during transfer, IBC split, drum knocked over, overfill during delivery). Consider:
- Volume released and speed of release.
- Slip hazards and worker exposure.
- Fire risk where flammables are present.
- Environmental impact if drains or ground are contaminated.
- Clean-up complexity, waste disposal, downtime and reputational impact.
5) Rate risk (likelihood x impact)
Use a simple scoring method (for example 1–5 likelihood and 1–5 consequence) to prioritise. The aim is not paperwork: it is to focus effort where it reduces real risk the most.
6) Apply the spill control hierarchy
Use layered controls, prioritising prevention first, then containment, then response:
- Prevention: maintenance, inspection, correct connectors, protected hoses, controlled transfer procedures, supervised deliveries, good housekeeping.
- Secondary containment: bunds, sumps, spill pallets, bunded drum storage, and correctly sized oil storage containment for tanks/containers.
- Drain protection: cover or block drains quickly to stop migration.
- Response equipment: spill kits matched to the liquids and positioned where spills occur.
- Recovery and disposal: safe collection, waste classification, and compliant disposal routes.
7) Build an incident response plan people can actually use
HSE and UK pollution prevention guidance emphasise being prepared: the right equipment, clear procedures, trained people, and arrangements for waste generated by the clean-up. Your plan should include:
- Who raises the alarm and who leads the response.
- Immediate actions: stop source, make safe, protect drains, contain spread.
- What PPE is required for your site liquids.
- Where equipment is kept and how to access it quickly.
- Escalation and reporting: when to contact regulators, landlords, clients or emergency services.
- Post-incident actions: documentation, restocking, and corrective measures.
8) Assign actions and check they stay in place
Turn findings into an action list with owners and dates (for example: install bunding, upgrade drip trays, add drain covers, relocate spill kits, introduce transfer checklists, schedule inspections). Review after changes and after incidents.
Common controls that make a measurable difference
- Bunded storage and drip trays at all dispensing and decant points.
- Drain covers and drain blockers placed at high-risk areas (yards, loading bays, plant rooms).
- Correct spill kits (oil-only for hydrocarbons, chemical kits for corrosives, general purpose for mixed aqueous spills).
- Routine inspections of storage, hoses, pumps, connectors and bund integrity.
- Training and drills so staff can respond under pressure.
Recommended Serpro products to support your assessment outcomes
- Oil & Fuel Spill Kits for diesel, petrol, hydraulic oils and oily residues.
- Drip and Spill Trays to control drips and small leaks at source.
- Drain Protection to prevent spills entering surface water drains.
- Spill Containment options for bunding, IBC containment and larger area control.
- COSHH Cabinets to improve safe storage and segregation where required.
Further guidance (external)
If you want to align your approach with recognised UK guidance, these resources are a strong starting point:
- GOV.UK: Oil storage regulations and safety
- GOV.UK: Oil storage regulations for businesses
- NetRegs: Secondary containment systems (bunding)
- GPP 22 (NetRegs): Dealing with spills (risk assessments and response planning)
- HSE: COSHH emergencies (planning, equipment and training)
- HSE: Spill control and emergency response (COMAH technical guidance)