EPA's SPCC Guidance for Regional Inspectors is the agency's internal reference document explaining how EPA interprets and applies 40 CFR Part 112 in the field. It was written for EPA inspectors, but it is publicly available, and for facilities it is the clearest available window into how an inspector is likely to evaluate your program. This page explains what the document is, what it covers, how much legal weight it carries, and how to use it before an inspection.
Why Facilities Read an Inspector's Document
What the Guidance Covers
The document is organized around the questions that arise repeatedly during SPCC inspections. The major themes are:
Applicability and jurisdiction
How to determine whether a facility is covered: what counts as non-transportation-related, how aggregate capacity is calculated and which containers are excluded, what constitutes oil for purposes of the rule, and how the reasonable expectation of discharge to navigable waters is evaluated. Applicability is where a meaningful share of disputes begin.
Secondary containment and impracticability
The distinction between general secondary containment under 112.7(c) and sized containment for bulk storage under 112.8(c)(2), how containment volume is evaluated, what sufficient freeboard means in practice, and what an acceptable impracticability determination under 112.7(d) looks like. Impracticability is heavily scrutinized because it removes an otherwise mandatory control, and the guidance addresses what supporting analysis and contingency planning EPA expects. See our secondary containment guide for the sizing rule itself.
Inspections, evaluations, and testing
How EPA evaluates whether inspection programs satisfy 112.7(e) and 112.8(c)(6): whether written procedures exist, whether records are signed and retained, whether the intervals chosen are defensible against industry standards, and whether integrity testing has actually been performed on schedule. Our inspection requirements guide and inspection checklist cover the facility-side execution.
Qualified facilities
How Tier I and Tier II eligibility is determined, what self-certification does and does not permit, and how EPA evaluates a self-certified plan differently from a PE-certified one. Because self-certification removes the engineer from the process, EPA scrutinizes eligibility and completeness closely.
Environmental equivalence and deviations
Section 112.7(a)(2) allows a facility to deviate from most requirements if it provides equivalent environmental protection and explains the reasoning in the plan. The guidance addresses what a defensible equivalence argument contains, which matters because a deviation documented only as a conclusion rarely survives review.
Facility-specific and equipment-specific topics
The guidance also addresses recurring situations that the rule text handles briefly: oil-filled operational equipment, loading and unloading racks, oil/water separators, produced water containers at production facilities, mobile and portable containers, and the treatment of animal fats and vegetable oils under Subpart C.
How Much Weight the Guidance Carries
| Source | Status |
|---|---|
| 40 CFR Part 112 | Binding regulation. Enforceable, and the basis for any violation. |
| SPCC Guidance for Regional Inspectors | Agency guidance. Reflects EPA's interpretation; does not itself create obligations. |
| Industry standards (STI SP001, API 653) | Incorporated indirectly where the rule requires conformance with good engineering practice and industry standards. |
| State and local requirements | Independently enforceable and frequently more stringent than the federal rule. |
The practical point: you cannot be cited for departing from the guidance, but you can be cited under the regulation for the same underlying condition that the guidance describes. Reading it tells you where an inspector is likely to press.
Using It Before an Inspection
- Test your applicability determination. If you have concluded you are not covered, or that certain containers do not count, confirm the reasoning matches how the guidance describes the calculation.
- Re-read any impracticability determination in your plan. This is the provision most likely to be challenged, and the one where a thin justification is most visible.
- Check that every deviation is explained. Environmental equivalence arguments stated as conclusions without supporting reasoning are a common weak point.
- Confirm inspection intervals are defensible. Be able to say which industry standard or engineering basis supports the frequency you chose.
- Pull records the way an inspector would. Ask for twelve months of inspections on one specific containment area and see how long retrieval takes.
- Re-test qualified facility eligibility. Capacity growth and discharge history both affect it, and both change over time.
Frequently Asked Questions
What is the SPCC Guidance for Regional Inspectors?
It is EPA's reference document explaining how the agency interprets and applies 40 CFR Part 112 during facility inspections. It was written for EPA regional inspectors but is publicly available. For facilities it functions as the clearest window into how an inspector is likely to evaluate applicability, containment sizing, impracticability determinations, inspection programs, and qualified facility eligibility.
Is the SPCC guidance legally binding?
No. It is agency guidance, not regulation. It does not create obligations and does not carry the force of law, and where it appears to diverge from the regulatory text, 40 CFR Part 112 governs. The practical significance is different from the legal significance: a facility cannot be cited for departing from the guidance, but it can be cited under the regulation for the same underlying condition the guidance describes.
What topics does the SPCC guidance cover?
The major themes are applicability and jurisdiction, secondary containment and impracticability determinations, inspections and integrity testing, qualified facility eligibility and self-certification, environmental equivalence and documented deviations, and recurring equipment-specific situations such as oil-filled operational equipment, loading and unloading racks, oil/water separators, mobile containers, and animal fats and vegetable oils under Subpart C.
Where can I find EPA's SPCC guidance document?
It is published on EPA's Oil Spills Prevention and Preparedness Regulations pages at epa.gov. EPA revises the guidance periodically and individual chapters carry their own revision dates, so check the date on the chapter you are relying on rather than assuming a copy on hand is the current version.
How should a facility use the inspector guidance?
Use it to pressure-test the judgment calls in your plan before EPA does. Confirm your applicability determination matches how the guidance describes the calculation, re-read any impracticability determination since that provision draws the most scrutiny, verify that every deviation carries supporting reasoning rather than a bare conclusion, confirm your inspection intervals have a defensible basis in an industry standard, and re-test qualified facility eligibility against current capacity and discharge history.
What do EPA inspectors look at most closely?
In practice, the provisions requiring judgment and the provisions requiring records. Impracticability determinations and environmental equivalence arguments draw scrutiny because they remove or replace otherwise mandatory controls. Secondary containment sizing draws scrutiny because it is calculable and therefore verifiable. Inspection and integrity testing records draw scrutiny because 112.7(e) requires them signed and retained for three years, making gaps immediately apparent.
Does the guidance replace reading 40 CFR 112?
No. The guidance explains EPA's interpretation of the rule but the enforceable requirements are in the regulation itself, published on the eCFR. A compliance program should be built on the regulatory text, with the guidance used to understand how EPA applies provisions that leave room for judgment. State and local requirements are independently enforceable and are frequently more stringent than the federal rule.
Ecesis SPCC Software
SPCC Software
Container inventory, plan generation, containment calculations, and compliance tracking.
Inspection Software
Automated scheduling, mobile field inspections, and audit-ready documentation.
Preventive Maintenance
Track tank maintenance, work orders, and equipment lifecycles.
Employee Training
Manage SPCC training requirements and oil-handling certifications.
Chemical Management
SDS library and chemical inventory alongside oil storage management.
Mobile EHS App
Field inspections, incident reporting, and data collection from any device.
