AST report compliance starts with a single federal rule: if your facility’s aggregate aboveground oil storage capacity exceeds 1,320 gallons in containers of 55 gallons or more, and a spill could reasonably reach navigable waters or adjoining shorelines, you must prepare and maintain a Spill Prevention, Control, and Countermeasure (SPCC) plan under 40 CFR Part 112.1eCFR. 40 CFR 112.1 – General Applicability The plan stays on-site rather than being filed with EPA, and most states run their own aboveground storage tank registration program on top of it.
When the SPCC Rule Applies
Two conditions have to be met before the rule reaches your facility. First, the aggregate capacity threshold: only containers of 55 gallons or more count, and the qualifying containers across the whole property must add up to more than 1,320 gallons. Second, the geographic test: a discharge from the facility must be able to reach navigable waters or adjoining shorelines.
Geographic exemptions rest on natural terrain and drainage, not on manmade barriers. A dike or containment wall does not take you out of the rule; a site whose land features make a discharge to water physically impossible does.2eCFR. 40 CFR Part 112 – Oil Pollution Prevention Most industrial sites, retail fueling stations, and larger storage operations near a waterway or storm drain fall inside the rule’s reach.
Farms follow a separate set of thresholds under the Water Resources Reform and Development Act. Operations below 2,500 gallons aggregate are fully exempt, and farms between 2,500 and 6,000 gallons are exempt if they have no reportable discharge history. Above 6,000 gallons a farm needs an SPCC plan, though the certification requirements are more relaxed than those for industrial facilities.3U.S. Environmental Protection Agency. SPCC Program – Farms and the Water Resources Reform and Development Act Fact Sheet
Who Has to Certify the Plan
For most non-farm facilities, a licensed Professional Engineer must review the SPCC plan and certify that it meets 40 CFR Part 112. The PE’s certification attests that they visited the facility, evaluated the plan against good engineering practice and applicable industry standards, and confirmed that inspection and testing procedures are adequate.4eCFR. 40 CFR 112.3 – Requirements to Prepare and Implement a Spill Prevention, Control, and Countermeasure Plan PE certification is typically the largest single cost in the SPCC process.
Smaller sites can skip the PE if they qualify. A facility qualifies when its total aboveground oil storage capacity is 10,000 gallons or less and it has no single spill over 1,000 gallons and no two spills each exceeding 42 gallons within any 12-month period during the prior three years.5U.S. Environmental Protection Agency. Is My Facility a Qualified Facility under the SPCC Rule Within that category, a Tier I facility (no individual container over 5,000 gallons) can use the streamlined template in Appendix G to Part 112 and self-certify.6U.S. Environmental Protection Agency. Tier I Qualified Facility SPCC Plan Template A Tier II facility (one or more containers over 5,000 gallons, aggregate still at or below 10,000 gallons) can still self-certify but must prepare a full plan rather than the template.7U.S. Environmental Protection Agency. Difference between an SPCC Tier I and Tier II Qualified Facility
Some states do not allow self-certification at all and require PE review regardless of facility size. Check with your state environmental agency before relying on the qualified facility option.
What the Plan Has to Contain
The SPCC plan is part inventory, part prevention strategy. For every covered tank you document capacity, construction material, contents, and the type of secondary containment protecting it. Every facility must have secondary containment capable of holding discharged oil before cleanup: dikes, berms, retaining walls, curbing, drip pans, sumps, collection systems, drainage channels, diversion ponds, or sorbent materials.8eCFR. 40 CFR 112.7 – General Requirements for Spill Prevention, Control, and Countermeasure Plans
A facility diagram is a core element, showing each tank’s location relative to property boundaries, water sources, and drainage pathways, along with emergency shut-off valves and containment structures. The plan also needs emergency contacts for facility managers, spill response contractors, and relevant agencies, plus the technical data points an inspector would verify on a walk-through: wall thickness, overfill protection devices, alarm systems, maximum capacity, and typical working volume.
Inspections, Testing, and the Five-Year Review
The rule requires owners to test or inspect each aboveground container for integrity on a regular schedule and after any material repair. It does not prescribe a single method; instead, it directs owners to follow industry standards and use qualified personnel appropriate to the container’s size, design, and configuration.9U.S. Environmental Protection Agency. SPCC Bulk Storage Container Inspection Fact Sheet Common methods include visual inspection, hydrostatic testing, ultrasonic thickness measurement, radiographic testing, and acoustic emissions testing. Two industry standards dominate: STI SP001 for shop-fabricated tanks, small field-erected tanks, and portable containers,10STI/SPFA. SP001 Standard for the Inspection of Aboveground Storage Tanks and API 653 for larger field-erected tanks built to API 650, which requires an Authorized Inspector to perform external visual inspections at least every five years.
Facility staff should also perform routine visual walk-throughs of tank exteriors, looking for corrosion, deterioration, or oil accumulation inside containment areas, and document dates and findings.
Every plan must be reviewed and evaluated at least once every five years from the date the facility became subject to the rule. The review asks whether more effective prevention technology has become available and been field-proven since the last evaluation. If it has and would significantly reduce the likelihood of a discharge, the plan must be amended within six months, and the amendment implemented as soon as possible but no later than six months after it is prepared.11eCFR. 40 CFR 112.5 – Amendment of Spill Prevention, Control, and Countermeasure Plan by Owners or Operators Even when no amendment is needed, you must document that the review happened, with a signed statement giving the review date and the outcome.
Outside the five-year cycle, any change to the facility’s design, construction, operation, or maintenance that materially affects the potential for a discharge triggers an amendment obligation, on the same six-and-six timeline. Unless the facility qualifies for self-certification, a PE must certify each technical amendment.
Where the Plan Lives and What to Keep
SPCC plans are not submitted to EPA or any other federal agency. The plan must be maintained on-site at a facility location that is normally attended at least four hours per day, and it must be available immediately if an inspector arrives.12U.S. Environmental Protection Agency. Spill Prevention, Control, and Countermeasure (SPCC) Overview There is no submission receipt and no confirmation. Compliance exists in your files.
Inspection and testing records must be retained for at least three years.9U.S. Environmental Protection Agency. SPCC Bulk Storage Container Inspection Fact Sheet Records kept under usual and customary business practices satisfy the requirement, so no special forms are needed, but the records must show dates, findings, and enough detail to prove inspections actually happened. The plan itself is a living document, kept indefinitely and updated through the five-year review and any triggering change.
The Chemical Inventory Report People Miss
Facilities storing hazardous chemicals in aboveground tanks may also owe an annual filing under Section 312 of the Emergency Planning and Community Right-to-Know Act. If you store hazardous chemicals at or above 10,000 pounds, or extremely hazardous substances at or above 500 pounds (or the listed threshold planning quantity, whichever is lower), you must file an annual chemical inventory report.13eCFR. 40 CFR Part 370 – Hazardous Chemical Reporting
These “Tier II reports” are due by March 1 each year and go to three recipients: your State Emergency Response Commission, Local Emergency Planning Committee, and the local fire department with jurisdiction over the facility. Most states offer electronic portals, but the forms and procedures vary. Unlike an SPCC plan, Tier II reports are actively filed and carry their own deadlines and penalties.
State AST Registration Runs in Parallel
Most states also run their own aboveground storage tank registration programs, with separate forms, fees, and deadlines. State programs typically require registering each tank and providing information about size, contents, construction, age, and location. Some states impose stricter capacity thresholds than the federal rule, bringing smaller tanks or additional substances into the net. Others add financial responsibility demonstrations, requiring proof that you can cover cleanup costs through insurance or another mechanism.
State and federal requirements operate independently. Complying with one does not satisfy the other. A facility with a complete SPCC plan still needs to meet its state’s registration and reporting obligations separately.
Penalties
The maximum civil penalty for Clean Water Act oil pollution violations assessed on or after January 2025 is $59,114 per day of violation under 33 U.S.C. 1321(b)(7)(A), reflecting years of inflation adjustments.14eCFR. 40 CFR Part 19 – Adjustment of Civil Monetary Penalties for Inflation Older references to a few thousand dollars per day are out of date.
Triggers include not having a plan at all, having a plan that does not reflect current facility conditions, failing to conduct required inspections, and being unable to produce inspection records during a site audit. An actual discharge to navigable waters carries additional per-barrel penalties, and gross negligence or willful violations push the numbers higher.15United States Department of Justice. Water Individual employees at federal facilities may also face criminal sanctions for Oil Pollution Act violations.16U.S. Environmental Protection Agency. Oil Pollution Act (OPA) and Federal Facilities