Oil Storage Tank Maintenance Checklist
Planned maintenance for fuel oil storage: bund integrity and capacity, water and sediment contamination, fuel condition, leak detection, and pipework inspection.
Also available as editable Excel and Word — with asset, sign-off and findings columns.
What is an oil storage tank maintenance checklist?
A oil storage tank maintenance checklist is a structured list of the 12 preventive maintenance tasks — covering visual, functional, safety and record-keeping checks — that keep an oil storage tank running safely and reliably. It groups routine checks by frequency, from daily inspections to annual servicing, so FM teams and building engineers can plan and evidence preventive maintenance.
Core oil storage tank checks
- Inspect the tank shell, seams, and supports for corrosion, damage, and distortion
- Check for water in the tank bottom and drain or remove where present
- Confirm bund capacity remains adequate and all fill and draw points sit inside it
- Record fuel age, sample results, and deliveries in the tank log
What is an oil storage tank?
An oil storage tank holds fuel for boilers, standby generators, or fire pumps. In commercial buildings it is usually a bunded steel or plastic tank, either integrally bunded or within a masonry bund, fitted with a contents gauge, fill point, vent, and a draw-off line with fire valve protection.
Two obligations sit over it. The environmental duty is to prevent pollution: oil storage regulations set requirements for secondary containment, and the bund is expected to hold a stated proportion of the tank's capacity, with all fill and draw points inside it. A failed bund converts a minor leak into a reportable pollution incident with disproportionate cost.
The operational duty is fuel condition, and it is the one that catches people out on standby plant. Diesel degrades in storage, absorbs water, and supports microbial growth at the fuel-water interface. A generator that has been tested monthly off-load for three years can still fail when the fuel it draws is contaminated — which is precisely the moment the failure matters most. Fuel sampling and polishing are maintenance activities, not optional extras.
This checklist is one of 15 in our heating maintenance checklists, covering boilers, calorifiers, heat exchangers, heat pumps and flues — combustion, controls and hot water safety checks.
Typical Oil storage tank maintenance checklist
A practical starting point for planned preventive maintenance. Always refer to the manufacturer's O&M manual and site-specific requirements.
Visual Checks
- Inspect the tank shell, seams, and supports for corrosion, damage, and distortion
- Check the bund for cracks, damage, and any accumulated rainwater or debris
- Inspect the fill point, cap, and any lockable arrangement for security
- Inspect the draw-off line, filters, and isolation valves for leaks and blockage
Functional Checks
- Check for water in the tank bottom and drain or remove where present
- Take a fuel sample and assess for water, sediment, and microbial contamination
- Test the contents gauge and any low-level or leak detection alarm
- Check the vent is clear and correctly terminated
Safety Checks
- Confirm bund capacity remains adequate and all fill and draw points sit inside it
- Verify the fire valve is in place and its sensing element intact
- Check spill kit availability and condition at the tank location
Record Keeping
- Record fuel age, sample results, and deliveries in the tank log
Download the free Oil storage tank maintenance checklist PDF
Get all 12 tasks as a printable PDF — free, no signup needed. Keep a copy in the plant room, attach it to work orders, or share it with your maintenance contractor.
The PDF is free and needs nothing. The Excel and Word versions add asset details, sign-off and findings columns so you can record the work as you do it — we ask for an email address for those.
Typical maintenance frequency
Suggested intervals for oil storage tank maintenance. Actual frequencies should follow manufacturer guidance and site-specific risk assessments.
Monthly
- •Visual check of tank and bund
- •Check for water in the bund and drain if needed
- •Confirm contents gauge reading
Quarterly
- •Check for water in the tank bottom
- •Inspect filters and draw-off line
- •Test level alarms
Annually
- •Full tank and bund inspection
- •Fuel sampling and analysis
- •Fire valve and leak detection check
- •Consider fuel polishing based on age and sample results
Common faults and issues
Issues to be aware of when maintaining oil storage tank equipment.
Safety and compliance notes
Key safety considerations for oil storage tank maintenance. This is general guidance only — always follow OEM instructions, statutory requirements, and your organisation's safe systems of work.
Reference standards and frameworks
- United Kingdom
- SFG20, CIBSE Guide M, and Gas Safe requirements for gas-fired plant
- North America
- ASHRAE/ACCA Standard 180, plus ASME CSD-1 for automatically fired boilers
- Middle East
- Dubai Municipality's Green Building Regulations require commissioning to CIBSE Commissioning Code B (boilers)
Frameworks commonly referenced when planning oil storage tank maintenance programmes. Always confirm the requirements that apply to your site and jurisdiction.
Managing Oil storage tank documentation with PM Assist
PM Assist helps FM and building operations teams search their O&M manuals and building drawings in seconds. Upload your oil storage tank documentation and ask questions like “What is the bund capacity for this tank?” or “When was the fuel last sampled?” — and get source-cited answers instantly.
The checklist tells you what to check. The manual tells you the numbers.
Ask a oil storage tank manual a question and get the answer back with the page it came from. No signup, and you can drop in your own PDF instead of the sample.
“What is the bund capacity for this tank?”Runs against a sample chiller manual so you can see the shape of the answer — then try it on one of yours.
Take this checklist with you
Download the branded PDF, generate a custom version for your asset, or run AI search across all your building documentation.
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Further reading on oil storage tank maintenance
Compliance topics for oil storage tank maintenance
Compliance & CAFM
Run oil storage tank maintenance in PM Assist
This checklist is also a planned maintenance programme in PM Assist, included in every paid plan alongside the compliance register and mobile inspections.
- Add an oil storage tank to a building's asset register and this maintenance programme is created for you, with each task on its frequency in the planner.
- Standby Generator Service & Load Test and Oil Storage Tank Inspection are tracked on the compliance register, with the date last done, the date next due and the certificate.
- Contractors can be given a login to see their jobs and upload certificates.
Frequently asked questions
How much should an oil tank bund hold?
Does stored diesel go off?
Why is water in a fuel tank a problem?
Manage your building documentation with AI
PM Assist gives FM teams instant access to O&M manuals, drawings, and maintenance knowledge — all searchable with AI.
- Upload and organise building documentation
- AI-powered search across all your manuals
- Source-cited answers for maintenance queries
- Team collaboration and access control
- No credit card required to start