Certified Storage Tank Inspection and Testing (NDT)
in the Cushing, OK area

API 653 inspections are required for large, field-erected aboveground storage tanks (ASTs) that are constructed to the API 650 standard. In Cushing, these tanks are commonly used by petroleum terminals, manufacturing plants, chemical facilities, and utilities to store fuel, oil, or hazardous liquids. If your tank is over 75,000 gallons, made from welded-steel construction, has a diameter of 30 feet or more, or a height of 50 feet or more, there's a high likelihood it falls under API 653 requirements.

STI SP001 inspections are typically required for shop-fabricated aboveground storage tanks under 75,000 gallons, often found at gas stations, commercial facilities, and industrial properties. If you're storing oil or hazardous substances in Cushing, you may be subject to the EPA's Spill Prevention, Control, and Countermeasure (SPCC) rules for this inspection.

The frequency depends on the tank size, contents, and regulatory classification. In general, API 653 recommends formal external inspections every 5 years and internal inspections every 10-20 years. STI SP001 inspection frequency is determined by their size, category, and risk factors. We can help determine your specific schedule.

Yes. All our inspectors hold API 653 and STI SP001 certifications and are trained in accordance with industry and regulatory standards. We are fully qualified to perform inspections anywhere in Oklahoma, including Cushing.

Under 40 CFR 112 (SPCC Rule), facilities in Cushing storing 1,320+ gallons of oil in ASTs (containers ≥ 55 gal) and with a risk of discharge into navigable waters (e.g. pipelines reaching local rivers) must maintain a certified SPCC Plan. That includes documented inspections of tanks, piping, valves, and secondary containment structures.

The Oklahoma Petroleum Storage Tank Division (PSTD) enforces comprehensive AST regulations under OAC Title 165 Chapter 26, addressing tank design, construction, secondary containment, release detection, recordkeeping, and mandatory notifications (e.g. ownership changes, releases). PSTD adopts NFPA 30/30A standards and requires thorough inspections and tightness testing, especially for tanks at fleet, retail, commercial, bulk plant, and marina facilities.

We assist Cushing-area facilities operating aboveground storage tanks (ASTs) by performing certified API 653 and STI SP001 inspections and delivering complete, professional documentation of those inspections—helping you meet both EPA SPCC requirements and Oklahoma state regulations.