Oil storage regulations for businesses

Oil spills are one of the most common causes of water pollution incidents from commercial and industrial sites. If you store oil, you are expected to prevent leaks, overfills and contaminated run-off reaching drains, surface water or groundwater. This page summarises practical steps aligned with GOV.UK guidance and UK environmental expectations, with a clear question-and-solution format for day-to-day compliance.

Key takeaway: If you store oil on site, you should use compliant secondary containment (bunding), control transfer activities, protect drains, and keep spill response equipment ready. These measures reduce pollution risk, downtime and enforcement exposure.

Question: What counts as oil storage for a business?

Solution: Treat any stored oil that could leak to the environment as within scope of oil storage controls. This typically includes:

Bulk tanks (fixed or mobile) for heating oil, diesel, gas oil, kerosene and similar fuels
IBC and drums holding lubricants, hydraulic oil, engine oil and cutting fluids
Waste oil storage prior to collection
Oil-filled equipment where leaks can escape containment (for example transformers or generators located outdoors)

Even if your site is not a refinery or depot, routine storage in workshops, yards, plant rooms and loading bays still presents a pollution risk and should be managed accordingly.

Question: Which GOV.UK rules and regulators apply to my site?

Solution: Use GOV.UK as your primary reference point and confirm the regulator for your location:

England: Environment Agency (EA)
Wales: Natural Resources Wales (NRW)
Scotland: Scottish Environment Protection Agency (SEPA)
Northern Ireland: Northern Ireland Environment Agency (NIEA)

GOV.UK provides practical requirements and good practice for above-ground oil storage, including bunding expectations, siting, inspection, and spill preparedness. Always check for sector-specific permit conditions, lease requirements, insurer expectations, and local authority trade effluent controls if you discharge to sewer.

Citations: See GOV.UK guidance on storing oil safely for businesses and preventing pollution (GOV.UK).

GOV.UK

Question: What is the most common compliance gap?

Solution: Inadequate secondary containment (bunding) is one of the most frequent issues. The practical fix is to ensure every oil container is within a suitable bund or bunded store, and that the bund is:

Correctly sized for what you store (including the largest container and an allowance for rainfall where relevant)
Structurally sound, with no cracks, failed seals or unprotected joints
Kept empty of rainwater and debris where possible (do not pump out without checking for oil contamination)
Positioned away from drains and watercourses where practicable

If you use bunded pallets, bunded drum stores or bunded tanks, check that the sump capacity is not being reduced by stored items, waste, absorbents or water.

Question: Do I need bunding indoors as well as outdoors?

Solution: Yes, if a leak could travel to a drain, doorway, yard or watercourse. Indoor spills can migrate quickly via service ducts, door thresholds and drainage channels. Use bunded storage even inside workshops, and add drip trays under tapping points, pumps and frequently handled containers.

Where indoor storage is close to doorways or loading bays, treat it as a higher risk zone and enhance controls: drain covers, spill socks, and clearly marked spill stations.

Question: What should my inspection and maintenance routine look like?

Solution: Build a simple, auditable routine that you can prove during audits or after an incident:

Daily/weekly checks: visual check of tanks, valves, hoses, IBC taps, drum bungs, and bund condition
Monthly checks: confirm bund capacity is not compromised; check rainwater build-up and signs of oil sheen
Planned maintenance: replace perished hoses, worn seals, damaged valves, and cracked containment
Record keeping: keep inspection logs and corrective actions (photos help)

Inspections should focus on the known failure points: fill connections, gauges, sight tubes, overfill prevention devices, transfer hoses and couplings.

Question: How do I stop oil reaching drains if something goes wrong?

Solution: Use layered drain protection and spill control, especially in yards and loading areas:

Keep drain covers or drain mats accessible and sized for your site drains
Stock absorbent socks to dam doorways and channel lines
Use absorbent pads and rolls for rapid surface control
Consider isolation valves or drain blockers for higher-risk sites (engineering control)

Where transfer operations happen, treat the area as a designated spill risk zone: mark it, keep it clear, and position spill kits within immediate reach.

Question: What spill kit should a business keep for oil storage compliance?

Solution: Match spill kits to the oils you store and the realistic spill volume at the point of use. Typical site set-ups include:

Oil-only spill kits: for fuels and lubricants (hydrophobic absorbents are effective in wet conditions)
Maintenance spill kits: for mixed fluids in workshops
Large capacity spill kits: for bulk tanks, tanker offload points and plant yards

Place spill kits at: tank fill points, IBC/drum stores, loading bays, generator areas, and near drains. Train staff to isolate the source, protect drains first, then contain and absorb.

Internal reference: See our guidance on best practice spill prevention and response: Best practices.

Question: How do tanker deliveries and transfers change the risk?

Solution: Most significant spills occur during transfer, not static storage. Reduce risk with a controlled delivery process:

Use a written delivery checklist and a designated competent person to supervise
Confirm tank ullage before delivery and avoid overfill
Keep hoses and couplings in good condition and use caps/blanks to prevent drips
Ensure the fill point is within containment or has local spill containment/drip trays
Stage drain protection and a spill kit before starting any transfer

For multi-tenant sites, agree responsibilities and emergency actions in advance, including who calls the regulator and who isolates drains.

Question: What does a compliant oil storage area look like in practice?

Solution: Here are realistic examples businesses can implement:

Workshop: bunded drum store for lubricants, drip trays under decanting, oil-only spill kit by the exit, drain covers near floor channels
Yard: bunded IBC pallet on a hardstanding away from drains, protected from vehicle impact, clear signage, spill station near loading bay
Plant room: bunded day tank, inspection log on the wall, absorbent pads and a small spill kit, controlled waste oil container in bund
Generator area: bunded base or drip tray, regular checks for leaks, drain protection stored nearby

Question: What happens if we do not follow oil storage guidance?

Solution: The consequences of poor oil storage can include pollution incidents, clean-up costs, business interruption, regulatory enforcement, and reputational damage. Even a small fuel spill can cause a reportable incident if it enters surface water, groundwater or drains. The most cost-effective approach is prevention: bunding plus inspection plus spill readiness.

Question: What should I do next to improve compliance quickly?

Solution: Use this fast action checklist:

Map where oil is stored and used (tanks, IBCs, drums, waste oil)
Confirm each location has suitable bunding/secondary containment
Check proximity to drains and add drain protection where needed
Position the right spill kits at the point of risk and replenish after use
Create a simple inspection log and assign ownership
Train staff on first actions: stop the source, protect drains, contain, absorb, dispose correctly

Further information and citation: Always refer to the latest GOV.UK guidance on oil storage for businesses and any regulator updates for your nation. GOV.UK

Related internal reading: Spill management best practices