?️ Gasoline Storage Tanks airtightness testing & monitoring
annual certification · biannual self‑monitoring · periodic facility tests · continuous checks
Annual Certification for Transport Vehicles
- Airtightness testing – strictly regulated for mobile tanks (e.g., cargo tank trucks) to prevent vapour emissions.
- Annual certification – a current certificate must be maintained on file and readily available on the vehicle, verifying successful pressure decay or leak detection tests within the past year.
Biannual Self‑Monitoring Requirements
- Self‑inspection program – companies must conduct at least two self‑inspections per year for vapour recovery system and vapour‑tight sealing points.
- Spacing & records – inspections must be at least three months apart, and all original monitoring records must be preserved for regulatory review.
Periodic Testing for Stationary Facilities
- Comprehensive integrity inspections – conducted every three to six years at bulk terminals and retail stations, including sealing performance of tank and vapour recovery systems.
- Shortened cycles – required if the tank stores highly volatile or corrosive media, to mitigate hazardous leak risks.
Continuous Monitoring & Operational Checks
- Monthly visual/functional inspections – of critical safety attachments (pressure relief valves, vapour recovery lines) to check for blockages or degradation.
- Vapour space monitoring – for large stationary tanks without inert gas blanketing, monthly monitoring is required to detect sudden pressure changes that could indicate loss of airtightness.
● always comply with local environmental and safety regulations ● maintain accurate records for all tests and inspections ●