Trace the prior service and the complete wetted path
Contamination can enter through the tank, manway, vent, pump, hose, coupling or handling practice. A clean-looking shell does not establish that the delivery system is suitable for its next service. Start with tank identity, prior cargo and cleaning eligibility.
Keep the approved cleaning process and dated release checks for the whole water-contact path. Drinking-water service needs the applicable quality acceptance. Odor, appearance or a stainless material description cannot substitute for the required test.
Separate cleaning evidence from authorization to enter the tank
Cleaning can expose workers to chemical, pressure, slip, atmosphere and rescue hazards. Avoid entry where possible and use the applicable confined-space program when entry is necessary. Possessing a cleaning checklist does not authorize that entry.
Scroll horizontally to view all columns.
| Decision | What to establish | Condition or limit |
|---|---|---|
| Prior service | Reconcile tank identity with prior cargo and cleaning eligibility. | Unknown prior cargo cannot be cleared by visual inspection alone. |
| Cleaning scope | Treat tank, pump, pipes, hoses, couplings, vents and access covers. | Cleaning only the shell leaves other contamination paths open. |
| Verification | Use the required inspection and water-quality release method. | Odor, appearance or material grade is not a release test. |
| Worker safety | Control chemicals, pressure, drainage and any confined-space entry. | A cleaning instruction does not itself authorize tank entry. |
Record the whole water-contact path
WHO emergency-water guidance covers cleaning tanks and tankers. Use it as a process reference while confirming local water-quality requirements, prior tank service and the suitability of every wetted material. It does not certify the selected truck. WHO technical notes on WASH in emergencies
Request the approved cleaning method and dated record for the tank, pump, valves, hoses and couplings, together with the responsible operator and required release tests. A photograph of a clean shell does not establish potable-water suitability.
Keep the cleaning record with its release result
Request the operator, date, method, treated components and required water-quality results, including any restrictions. Unknown prior cargo, failed criteria or unapproved entry must remain unresolved until the responsible qualified parties determine the next action.
Information to prepare for this review
- Tank identity and verified prior-cargo history
- Intended water class and local acceptance criteria
- Approved cleaning and disinfection procedure
- Pump, hose, coupling and storage treatment
- Inspection, sampling and laboratory responsibility
- Release authority and record-retention requirement
Records to request and keep
- Tank identity and prior-cargo declaration
- Approved cleaning procedure and execution log
- Pump, hose and coupling treatment record
- Inspection, sample, result and release approval
Common mistakes and what to check instead
- Assuming a new tank needs no cleaning: Apply the approved commissioning and release process to the complete wetted system.
- Cleaning hoses separately without identity control: Link each hose and coupling to the tanker and service class.
- Entering the tank as routine work: Avoid entry where possible and apply qualified confined-space controls when required.
Scope of this guide
This guide is not a drinking-water standard or disinfection recipe.
Local water authorities and qualified safety personnel control acceptance and entry procedures.
Stop release for unknown prior cargo, failed water-quality criteria, uncontrolled chemical exposure or unapproved confined-space entry.
Sources and applicability
Emergency water-supply guidance including cleaning tanks and tankers; not certification of a particular vehicle or approval for entry into a tank.
Document date:
Sources checked:
Controls the project-input, quotation, approval and inspection workflow described in this guide.
Provides public checklists and worksheets; the signed project documents remain controlling.
Defines the relevant product family and published configuration boundaries. Project-specific ratings require the selected OEM documents.
Primary public guidance for tanker suitability, cleaning, hoses, delivery planning and potable-water controls. It does not approve a vehicle or replace local water rules.
Manufacturer example supporting tank, pump, PTO, valve and leak checks. Its component limits are model specific and not KEEYAK ratings.