What this is
What is an above ground tank inspection?
What is an above ground tank inspection?
A periodic inspection of a bulk storage tank covering shell and coating condition, fittings and pipework, protection systems such as level gauges and overfill prevention, and the currency of any formal integrity testing. It is distinct from a drum store because the tank is a single larger asset with its own protection regime.
How does this differ from a chemical storage environmental check?
That check covers general drum, container and IBC storage areas: bunding, drainage proximity, segregation and labelling. This inspection covers one specific bulk tank, including systems a drum store lacks: level gauges, alarms, overfill prevention and a formal integrity test regime.
What is a knockout item on this inspection?
A finding severe enough that no accumulation of good scores offsets it: an active leak, a failed overfill system, or a tank never integrity-tested. The score is overridden by these, not averaged against them.
Scope
When is an above ground tank inspection required?
This inspection is scoped to one tank as a discrete asset, and is most often misapplied by being used, or skipped, in place of the general storage check covering drums and IBCs nearby.
Use this template when
- A specific above ground bulk storage tank is due its scheduled inspection
- A tank has been returned to service after maintenance, relining or a change of contents
- An incident, near miss or observed staining suggests the tank's condition has changed since the last inspection
- A linked asset or substance record needs this inspection to exist against it
- You are running the Environmental Management programme and this inspection is one of its recurring steps
Do not use it for
- Chemical Storage Environmental Check, which covers general drum, container and IBC storage rather than a single bulk tank
- Environmental Site Inspection, which is a general environmental walk of the whole site, not an asset-specific inspection
- Stormwater Outfall Inspection, which checks discharge points rather than the tank that may be their source
- A maintenance work order on its own, which addresses a specific defect but doesn't substitute for the periodic inspection that finds it
- Anything outside KnowEnviro, which belongs in the workspace that owns that process
Compliance mapping
Which API 653 requirements does this satisfy?
API 653 sets the inspection and integrity-testing regime for welded tanks; EPA SPCC sets containment requirements for oil storage. Neither prescribes this form, but both expect the findings it captures.
| Clause | Requirement | Where it lands |
|---|---|---|
| API 653 sec.6 | Routine in-service inspection of the tank exterior, foundation, shell and appurtenances for deterioration | Tank condition |
| API 653 sec.4 | Formal periodic integrity assessment at intervals set by service condition and prior results | Integrity testing |
| EPA SPCC 40 CFR 112.8(c)(6) | Regular inspection of aboveground containers for deterioration, discharge or oil accumulation within containment | Tank condition |
| EPA SPCC 40 CFR 112.8(c)(8) | Effective measures to prevent tank overfill, such as level monitoring and high-level alarms | Protection systems |
| EPA SPCC 40 CFR 112.8(c)(2) | Secondary containment sized to the tank's capacity plus freeboard for precipitation | Protection systems |
| EPA SPCC 40 CFR 112.7(c) | Facility security including controls against unauthorised access to fill points and valves | Fittings and pipework |
| ISO 14001 cl.8.1 | Operational controls maintained to prevent or mitigate adverse impacts from a significant environmental aspect | Result |
What it does not cover
- Chemical Storage Environmental Check, which covers general drum, container and IBC storage and their bunding, not a single bulk tank asset.
- SPCC Plan itself, which is the written plan this inspection supplies evidence toward, not a substitute for one where the facility exceeds the SPCC threshold.
- Formal API 653 out-of-service inspection, which involves internal examination and non-destructive testing beyond a routine visual inspection.
- Pressure vessel inspection, which follows its own code where the tank is part of a pressurised process rather than atmospheric storage.
- Maintenance work order, which is where the repair itself is tracked once this inspection has raised the finding.
Global
Above Ground Tank Inspection requirements by country
Tank integrity duties are widespread, but prescription varies: some regimes name an inspection code, others rely on a general duty to prevent discharge.
EPA SPCC Rule 40 CFR Part 112, and API 653 as recognised industry practice
SPCC requires containment and inspection for oil tanks above threshold; API 653 is widely adopted, and often referenced by regulators and insurers, as the standard for how that inspection is performed.
Following API 653 gives the inspection a defensible technical basis even though SPCC does not name the code directly.
Control of Pollution (Oil Storage) Regulations and Environment Agency guidance
Tanks storing oil above a threshold volume require secondary containment and periodic inspection, drawing on the same principles as API 653 without mandating it by name.
A site can use API 653 as its methodology and still satisfy a UK duty framed in more general terms.
ISO 14001
Operational controls over a significant environmental aspect, monitored and evaluated as part of the management system.
A certification auditor expects a defined inspection regime with a stated interval and evidence of tests actually performed, not just a form that exists.
How to complete it
How to complete an above ground tank inspection, step by step
The template scores what is visible on the day. It does not force the distinction between a system tested and one that has merely never failed, which decides whether the record means anything.
"Working" and "tested recently" are different claims. A level gauge, alarm or overfill system never exercised is unproven, not confirmed, regardless of how long it has sat without incident. Score these separately rather than letting a plausible "yes" stand in for a test.
Staining below a fitting means a leak has already occurred, even if nothing drips today. Recording it as minor because the flow has stopped defers a finding that is, by definition, already a discharge rather than a risk of one.
"Overdue" and "never tested" both score as failing, but they are different findings. A tank with no test history has no baseline condition, which changes what the next test needs to establish and how urgently.
Bollards recorded as present are not automatically effective; they need to intercept the vehicle paths that actually reach the tank, and be undamaged themselves. A struck, unrepaired bollard is evidence the risk it guards against is live.
What auditors find
Most common above ground tank inspection findings
This inspection exists because a tank can look sound outside while its protection systems have quietly gone untested. These recur once those systems are checked rather than assumed.
| Finding | Clause | What fixes it |
|---|---|---|
| High level alarm recorded as working without evidence it has been tested. | EPA SPCC 40 CFR 112.8(c)(8) | Schedule and record a functional test; don't carry forward "working" without a test date. |
| Staining below a fitting or valve recorded as minor rather than an active leak. | API 653 sec.6 | Treat any staining as a confirmed discharge; investigate the source and repair rather than monitor. |
| Integrity test overdue, or never performed, with no baseline condition established. | API 653 sec.4 | Commission a formal integrity assessment; treat "never tested" as higher priority than overdue. |
| Overfill prevention or secondary containment marginal against current tank capacity. | EPA SPCC 40 CFR 112.8(c)(2) | Recalculate containment against actual capacity plus freeboard; escalate if marginal. |
| Impact protection present but not positioned against actual vehicle paths, or damaged. | EPA SPCC 40 CFR 112.7(c) | Reposition or repair bollards to intercept the routes vehicles actually take. |
| Fill point left unlocked or outside containment. | EPA SPCC 40 CFR 112.7(c) | Lock when unattended and confirm it discharges within containment, not beside it. |
Case in point
Case in point: the alarm that had never gone off
A facility's diesel tank was inspected monthly for two years, scoring consistently high. "High level alarm working" was recorded as yes every month, based on the panel showing no fault light. The alarm had never once sounded, because the tank had never been filled close enough to trigger it, and nobody had scheduled a functional test to confirm it actually would.
A driver miscounted the tank's remaining ullage and kept filling past the point the alarm should have triggered. It did not sound; a wiring fault from unrelated electrical work years earlier had disconnected the sensor, invisible on the panel because the fault indicator shared the same circuit. The overfill was caught only when product reached the vent. The fix was not a repaired sensor alone; it was a scheduled functional test of every high-level alarm, distinct from the visual check that had been passing it for two years.
The template
The template, field by field
The form exactly as it installs. Every field, option, score and conditional rule is editable, and the links to other templates come with it.
6 sections
- Reference
- ENV-018
- Archetype
- Inspection
- Record ID
- INSP-2026-000
- Scoring
- Percent with knockout items
- Direction
- High is good
- Singleton
- No
- Basis
- API 653, EPA SPCC
- Links
- Links Asset, Substance
- Tags
- Environment, Inspection
- Sections
- 6
- Fields
- 50
- Follow up fields
- 3
- Repeating sections
- 0
- Links out
- 4
Header
13 fieldsInspection ID*
Auto sequence. Format INSP-2026-00000.
The record's own ID. Other templates point at this value.
Status*
Drives who this goes to next.
- Planned2 pts
- In progress2 pts
- Complete3 pts
- Deferred0 pts
- Open0 pts
- Closed3 pts
- Overdue0 pts
Date and Time*
Completed By*
Site*
Site ID*
Format SITE-000.
Links to FDN-001 Site ID
Area
The area within the site.
Exact Location
Drop a pin for anything hard to find.
Tank*
Asset ID*
Format AST-0000.
Links to FDN-002 Asset ID
Tank Contents*
Capacity*
Installation Year
Tank condition
6 fieldsShell Condition*
- Good3 pts
- Minor corrosion1 pt
- Poor0 pts
Corrosion Present*
- None3 pts
- Surface only1 pt
- Significant0 pts
Coating Intact*
- Yes3 pts
- Partly1 pt
- No0 pts
Supports And Base Sound*
- Yes3 pts
- Minor issues1 pt
- No0 pts
No Leaks Or Staining*
Staining below a fitting is a leak that has already happened.
- Confirmed3 pts
- Staining present1 pt
- Active leak0 pts
Vents Clear*
- Yes3 pts
- Partly blocked1 pt
- Blocked0 pts
Fittings and pipework
6 fieldsValves Sound And Operable*
- Yes3 pts
- Stiff1 pt
- Defective0 pts
Flanges And Joints Sound*
- Yes3 pts
- Weeping1 pt
- Leaking0 pts
Flexible Hoses In Date
- Yes3 pts
- Overdue0 pts
Fill Point Secure And Locked*
Unlocked fill points on outdoor tanks invite both theft and misdelivery.
- Yes3 pts
- Secure not locked1 pt
- Open0 pts
Fill Point Within Containment*
- Yes3 pts
- Partly1 pt
- No0 pts
Contents Clearly Labelled*
- Yes3 pts
- Faded1 pt
- No0 pts
Protection systems
6 fieldsLevel Gauge Working*
- Yes3 pts
- Unreliable1 pt
- No0 pts
High Level Alarm Working*
- Yes3 pts
- Untested1 pt
- No0 pts
Alarm Tested Recently*
- Yes3 pts
- Overdue1 pt
- Never0 pts
Overfill Prevention Fitted*
- Yes3 pts
- No0 pts
Impact Protection Present*
Bollards. Vehicle impact is a leading cause of tank failure in yards.
- Yes3 pts
- Partial1 pt
- No0 pts
Secondary Containment Adequate*
- Yes3 pts
- Marginal1 pt
- No0 pts
Integrity testing
3 fieldsIntegrity Test Current*
- Yes3 pts
- Overdue0 pts
- Never tested0 pts
Last Test Date
Test Interval Years
Result
16 fieldsItems Assessed*
Excludes anything marked N/A.
Items Failed*
Score Percent*
Calculated on submission. High is good. N/A items leave the denominator.
Result Band*
- Pass3 pts
- Caution1 pt
- Fail0 pts
Completeness Percent*
How much of the template was actually answered. A high score on a half completed form is not a high score.
Tank Fit For Continued Use*
- Yes3 pts
- With conditions1 pt
- No0 pts
Work Order ID
Links to MNT-002 Work Order ID
Action Required*
Raise the action record, then enter its reference here.
- No2 pts
- Yes0 pts
Priority
- High0 pts
- Medium1 pt
- Low3 pts
CAPA ID
Format CAPA-2026-00000.
Links to FDN-014 CAPA ID
Action Owner
Next Inspection Due*
Inspector*
Signature*
Environmental Lead*
Second Signature*
ENV-018 · record IDs look like INSP-2026-000 · Links Asset, Substance
Open in KnowellaRun it with agents
From a document you fill in to a programme that runs itself
The inspection form is the easy part. What fails is the alarm nobody scheduled a real test for, and the integrity date that quietly slips behind.
Holds the inspection against the asset register, tracks integrity test currency separately from routine scoring, and routes knockout findings ahead of the review cycle.
Converts a protection-system finding into a scheduled functional test and work order, replacing "working" with a test record rather than an assumption.
Flags alarms and overfill systems recorded as working with no test date on file, and surfaces tanks approaching an overdue integrity assessment.
This template lives in KnowEnviro — environment and energy. Aspects, permits, waste, emissions, spills and sustainability reporting.
Meet KnowEnviro→Glossary
Above Ground Tank Inspection definitions and key terms
- Overfill prevention
- A system, mechanical or electronic, that stops or warns of filling before contents reach the level that would discharge from the vent or fill point.
- Secondary containment
- A barrier around the tank, such as a bund or dike, sized to hold its contents plus a rainfall allowance should the primary vessel fail.
- Integrity assessment
- A formal inspection under API 653, at intervals set by service history, establishing the tank's actual condition beyond a routine visual check.
- Freeboard
- The spare capacity in secondary containment above the volume needed for the contents, allowing for precipitation in an uncovered installation.
- Knockout item
- A finding severe enough, such as an active leak or a failed overfill system, that it overrides an acceptable percentage score rather than averaging into it.
FAQ
Frequently asked questions about above ground tank inspection
How is this different from the chemical storage environmental check?+
That check covers general drum, container and IBC areas across a site. This inspection covers one specific bulk tank, including systems a drum store never has: level gauges, alarms, overfill prevention and formal integrity testing under a code like API 653.
What does a knockout item actually mean for the score?+
The percentage score is overridden rather than averaged. A tank scoring well on cosmetic items but showing an active leak or a failed overfill system should not read as a pass.
How often does the formal integrity test need to happen?+
API 653 sets the interval by service condition and prior inspection results rather than a fixed period, which is why this inspection tracks the last test date and interval separately, so the due date reflects the tank's own history.
Why does staining count as a leak rather than a risk of one?+
Staining is evidence product has already reached the surface below the fitting. Recording it as minor because nothing is actively dripping treats a discharge that has happened as one that merely might.
Who should carry out this inspection?+
Facilities, since they know the tank's mechanical condition and protection systems. The environmental lead countersigns, and a formal integrity assessment beyond the visual check needs a competent inspector under the relevant code.
What should trigger an inspection outside the normal schedule?+
A tank returned to service after repair, a change of contents, observed leak or staining, or a vehicle-impact near miss. Waiting for the scheduled date treats a known change as though nothing has happened.
Keep going
Related templates and programmes
Industries this is written for
Programmes this belongs to
Used together in Environmental Management
Legal and Other Requirements Register
Lists every law, regulation, permit and commitment that applies to your operation
Compliance Evaluation Record
Records the periodic evaluation of whether you actually comply with each obligation
Waste Stream Register
Lists every waste stream produced on site, with its classification, container and disposal route
Waste Transfer Record
Records waste leaving site, including type, quantity, carrier and destination
Hazardous Waste Record
Records generation, storage and disposal of hazardous waste
Waste Area Inspection
Checks waste storage areas for correct segregation, labelling, containment and housekeeping
More in Enviro Inspections
Environmental Site Inspection
A general environmental walk of the site covering waste, storage, drains, emissions and housekeeping
Chemical Storage Environmental Check
Checks chemical storage from an environmental standpoint, covering containment, drainage proximity and labelling
Stormwater Outfall Inspection
Checks stormwater discharge points for sheen, colour, odour and debris
Dust and Odour Check
Checks for visible dust and detectable odour at the site boundary
Environmental Complaint Record
Records a complaint from a neighbour or the public about noise, odour, dust or discharge
Environmental Aspects Register
Lists how your activities interact with the environment and how significant each interaction is
Written and reviewed by
Siddarth Singh
Founder & Chief Executive Officer, Knowella
Certified Safety Professional and industrial and systems engineer with more than a decade inside food supply chain, freight and manufacturing operations. This page was written against the current text of the standards it cites, not against secondary summaries of them.
- Certified Safety Professional (CSP), Board of Certified Safety Professionals
- MBA, University of Chicago Booth School of Business
- MS and BS, The Ohio State University, Industrial and Systems Engineering
- Six Sigma Black Belt
Sources and last review. Reviewed 16 August 2026 against:
- API 653 — Tank Inspection, Repair, Alteration, and Reconstruction
- EPA SPCC Rule, 40 CFR Part 112, sections 112.7 and 112.8
- ISO 14001:2015 clause 8.1
- Control of Pollution (Oil Storage) Regulations and Environment Agency guidance (UK)
This page is general guidance, not legal advice. Confirm requirements with your jurisdiction’s regulator.