STI SP001 – Above Ground Storage Tank Inspection
The STI SP001 standard contains inspection and evaluation criteria for shop-built and small field-erected tanks not governed by API 653 codes, but require regular inspection and maintenance to remain compliant. This includes storage tanks up to 50,000 gallons (189,271 liters), including tanks that are portable, skid-mounted, liner-equipped, double-walled, and partially buried. This standard also covers the inspection of smaller portable containers such as 55-gallon drums, intermediate bulk containers or (IBC’s), and other container that are constructed of metal or plastic. Inspections are required at recommended intervals to remain compliant with the code and environmental regulations.