Above Ground Tank Inspections

The STI SP001 standard contains inspection and evaluation criteria for Shop and Field erected Above Ground Storage Tank Inspections not governed by API 653 codes, but require regular inspection and maintenance to remain compliant.

Double Wall Steel Tanks

Safeguard double-wall storage tanks and ensure compliance.

Underground Storage Tanks

Identify perforation at weld points, corrosion potential and other risks.

Portable Containers

Our inspection even covers 55 gallon drums and metal or plastic containers.

STI SP001 Inspections

Accurate, Reliable SP001 Inspections

The U.S. Environmental Protection Agency’s rule for Spill Prevention Control and Countermeasure (SPCC) contains the STI SP001 Standard, which outlines requirements for tank integrity testing.

While API 653 applies to larger tanks, STI SP001 governs compliance in shop-built and field-erected tanks of smaller sizes. 

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 containers that are constructed of metal or plastic.

Inspections are required at recommended intervals to remain compliant with the code and environmental regulations.

Equipment Covered
  • Double-Wall Steel Tanks
  • Single-Wall Steel Tanks
  • Vertical Atmospheric Storage Tanks
  • Horizontal Drum Type Steel Tanks
  • Underground Storage Tanks
  • Portable Containers
Above Ground Tank Inspection Services
  • Formal External Inspection
  • Formal Internal Inspection
  • Ultrasonic Thickness Testing (UTT)
  • Automated Ultrasonic Thickness Testing (AUT)
  • Corrosion Mapping
  • MFL/MFE Floor scan Inspection
  • Monthly and Annual Checklist Inspections
  • Portable Container Checklist Inspections
  • Leak Testing
  • Leak detection
  • Seal inspection
  • Post repair
  • Dike Survey
  • Spill Prevention Control and Countermeasure (SPCC) Plan Development and Review
  • Corrosion rate and remaining life evaluations
  • Fitness for Service (FFS) Evaluations
  • Risk Based Inspection (RBI)
  • Inspection Work Plan (IWP) Development and execution


We’re committed to providing unmatched SPI SP001 Above Ground STI service with our specialized equipment, technology, experience, and personnel. If you don’t your question answered here, feel free to get in touch.

Who can conduct an SPI SP001 Above Ground Storage Tank Inspection?

STI SP001 calls for two different type of inspections. The tank owner’s inspector should form monthly and periodic informal inspections based on STI SP001 paragraph 4.1.2. The standard requires formal inspections be conducted by a certified tank system inspector.

How does InServe evaluate above ground tank components?

Our experts use a range of inspection methods including visual, ultrasonic, liquid penetrant, magnetic particle, X-ray, and other nondestructive testing.

What happens after an above ground tank inspection STI SP001?

Our certified experts will provide you with reports on our findings that include needed repairs, a suggested follow-up inspection schedule, and any adjustments recommended on your tank’s maximum fill height.

How do I avoid regulation-related penalties and fines?

Obtain and document a formal inspection schedule for internal and external storage tank inspections. Work with one of our experts to ensure safety and compliance.

Why choose InServe for SPI SP001 Above Ground Storage Tank Inspection?

Our inspectors are American Petroleum Institute 653 certified, so we have the knowledge and experience to conduct required inspections with minimal downtime. We stay up to date on all state tank inspection requirements, and we can help ensure your tank is safe, reliable, and ready for continued service.


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