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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →A farm’s diesel storage may require a federal Spill Prevention, Control, and Countermeasure (SPCC) Plan, but tank capacity alone does not decide the question. The federal test also considers the oil stored and whether a spill could reasonably reach navigable waters or adjoining shorelines. State and local fire, building, and environmental rules may apply separately—even when a tank does not fall under a particular federal program.
Is my farm covered by SPCC?
Start with three questions: Is the operation a non-transportation-related facility? Does it store, transfer, use, or consume oil? Could a harmful discharge reasonably reach navigable waters or adjoining shorelines? EPA’s farm guidance identifies diesel as an oil product for this purpose. A farm that meets the criteria must prepare and implement an SPCC Plan, subject to applicable exclusions and other regulatory details.
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For the usual capacity calculation, EPA’s farm guidance sets the aboveground threshold at more than 1,320 U.S. gallons in aggregate, counting containers with a capacity of at least 55 gallons. Completely buried containers have a separate threshold: more than 42,000 gallons in aggregate, subject to exceptions. These are separate tests for different storage arrangements, not a single permit limit. A farm can have multiple tanks, so calculate the capacity across the relevant facility rather than looking only at the largest tank.
The water-pathway test matters as much as the capacity test. Consider how a release could move from the tank area through grading, ditches, drains, culverts, or other routes toward surface water or adjoining shorelines. A tank’s distance from a stream is not, by itself, the entire analysis. Document the site conditions that inform the reasonable-expectation determination.
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EPA uses a specific definition of “farm” for SPCC: a tract devoted to crop production or raising animals, including fish, that produced and sold—or normally would have produced and sold—at least $1,000 in agricultural products during a year. This is the SPCC definition, not a universal definition for every federal, state, or local program.
What counts toward the aboveground total?
EPA’s farm FAQ says to include qualifying drums and fuel tanks mounted on trailers, fuel trucks used exclusively on the farm, and tanks in pickups in the overall aboveground calculation. Containers with capacity below 55 gallons are not counted toward that threshold. The capacity of a container—not how much fuel happens to be in it on a particular day—is the relevant measure for this count.
Do not assume every parcel owned by the same farmer must be combined, or that separate addresses automatically count as separate facilities. EPA says parcels may be treated as separate facilities based on how they are operated and their farm identification. Establish the facility boundary from the actual operation and applicable rule; ownership alone does not settle it.
What must an SPCC Plan do?
The facility owner or operator is responsible for preparing and implementing an applicable SPCC Plan. A spill kit, an installer’s paperwork, or a vendor inspection does not replace that responsibility. The plan needs to reflect the actual tanks, transfer and dispensing activities, containment, and site conditions, and the facility must follow its procedures in practice.
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EPA says to keep the plan at a farm location that is normally attended at least four hours per day. Make sure the people responsible for fuel deliveries, dispensing, inspections, and response can find and follow the relevant procedures. An outdated plan that no longer matches the equipment or site is not a useful operating control.
Can a farm self-certify?
EPA’s farm guidance says an eligible farm with aboveground capacity from 1,320 through 10,000 gallons and a good spill history may prepare and self-certify its plan. This is conditional, not an automatic option for every farm under 10,000 gallons. The farm must meet the applicable regulatory conditions; some alternative measures require a professional engineer (PE). EPA indicates that farms above 10,000 gallons or with a spill history may need a PE-certified plan.
Before choosing a self-certification route, confirm the farm’s eligibility and the plan requirements that apply to its configuration. If the capacity, spill history, or proposed measures raise a question about whether PE review is required, get that question resolved before relying on a self-certified plan.
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Secondary containment is an operating system, not a one-time construction feature. Inspect it for damage, accumulated material, blocked drainage, or other conditions that could prevent it from holding a release. Follow the plan’s inspection and maintenance procedures, and check the containment area after rainfall or a spill.
EPA’s farm FAQ says to check accumulated rainwater for oil before releasing it. If oil is present, the oily water must be removed and disposed of; seek guidance from the state environmental agency or another knowledgeable authority as needed. Do not open a drain or release water based only on appearance or convenience.
EPA also says an unlined clay dike or berm can be sufficient for SPCC containment if it can hold a potential spill from the largest tank inside it. That answer addresses a particular SPCC containment question. It is not blanket approval of every earth berm, drainage arrangement, soil condition, or local fire-code design. Check that the specific containment configuration meets the applicable plan and jurisdictional requirements.
What rules apply to an aboveground or underground tank?
SPCC and the federal underground storage tank (UST) program are different regulatory systems. A tank’s exclusion from one program does not establish that it is unregulated or permit-free.
Aboveground tanks
EPA says aboveground tanks may be subject to other federal, state, or local requirements and recommends consulting the state agency responsible for oil pollution controls. Fire-code, building, environmental, siting, and installation requirements can depend on the tank’s capacity, construction, use, and location. Confirm the rules before buying, installing, moving, or modifying a tank.
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Underground tanks
EPA’s federal UST regulations exclude farm or residential tanks of 1,100 gallons or less that hold motor fuel for noncommercial purposes. The exclusion is limited to the described tank and use. EPA also cautions that implementing agencies can include some tank types excluded by the federal rules. Ask the relevant state UST agency how the particular tank is classified and regulated.
Why do state and local permits vary?
Federal thresholds do not answer every installation or operating question. State and local authorities may set separate requirements for tank plans, containment, separation distances, inspection, fire safety, and approvals. The following examples show why location matters; neither is a nationwide rule.
| Jurisdiction and guidance | What it says | What it does not establish |
|---|---|---|
| Oregon State Fire Marshal, 2024 guide for aboveground tanks used for motor-vehicle fuel dispensing | Tanks above 1,000 gallons, whether a single tank or aggregate capacity, require plans submitted for review before installation and operation, plus a final inspection before filling. The guide identifies UL 142 for nonprotected tanks and UL 2085 for protected tanks, and directs applicants to account for local planning and building requirements. | It does not set the permit threshold or design requirements for farms in other states, or settle requirements for every tank use in Oregon. |
| Michigan Bureau of Fire Services guidance for aboveground storage tanks | Michigan summarizes flammable- and combustible-liquid requirements, including secondary containment for single-wall tanks and an application and approval process for installation. Capacity and setback distinctions vary by type and use. | Michigan’s requirements cannot be applied as a substitute for another state’s rules. |
Before committing to a tank or site, contact the state fire marshal, the state environmental agency responsible for tank or oil-pollution programs, and the local fire and building authorities. Ask which approvals apply to the tank’s intended use, capacity, construction, location, and dispensing arrangement, and whether review or inspection must occur before installation or filling.
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A tank listing or design standard is only one part of a compliant installation. Oregon’s guide names UL 142 and UL 2085 for specified nonprotected and protected motor-fuel tanks, respectively, but a listed tank does not by itself establish that its capacity, location, or installation is approved in a particular jurisdiction.
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Compare the factors that affect the actual site and approval process:
- Capacity and aggregate storage: Include the relevant containers and facility boundary in the SPCC assessment, not just the proposed tank.
- Aboveground or underground placement: The federal SPCC and UST questions differ; identify the tank type and use before applying a threshold.
- Construction and containment: Establish whether the design is single-wall, protected, or otherwise equipped with secondary containment, and verify the required configuration locally.
- Siting and exposure: Check separation and setback rules, vehicle-impact exposure, drainage, and potential spill pathways at the specific location.
- Fuel handling: Review delivery, overfill prevention, dispensing setup, and the procedures operators will use.
- Approval sequence: Find out whether plans, installation approval, inspections, or other signoffs are required before the tank is filled or operated.
How should a farm approach workplace safety rules?
Do not treat a narrow OSHA interpretation as a universal farm-tank exemption. OSHA’s June 9, 2000 interpretation addressed a 1,000-gallon diesel tank at a construction site under construction standards in 29 CFR 1926.152. It said the cited provisions for diking certain small-container storage piles did not apply to that tank, while other portable-tank provisions did; it also discussed fire-extinguisher distance under the cited standard.
That response was tied to its facts and the construction standards it addressed. It does not determine the requirements for every farm, employer, tank, or workplace. Verify current OSHA requirements for the employer and work scenario rather than using the old interpretation as a blanket exemption.
What to do before installing or changing farm diesel storage
- Inventory the oil containers at the operation. Record each container’s capacity and whether it is aboveground or completely buried. Include qualifying drums and farm-use vehicle, trailer, pickup, and fuel-truck tanks in the aboveground review.
- Identify the facility boundary. Map the parcels and explain how they are operated; do not combine or separate them solely because of common ownership or separate addresses.
- Map potential spill pathways. Note nearby waters, shorelines, ditches, drains, and site grading that could affect whether a harmful discharge could reasonably reach them.
- Determine SPCC applicability and plan responsibility. Apply the oil, capacity, and discharge-potential criteria, then identify who will prepare, maintain, and implement the plan and whether self-certification or PE involvement is permitted.
- Review containment operations. Set inspection and maintenance practices, and establish how rainwater will be checked and how oily water will be removed and disposed of.
- Classify the tank and its use. Distinguish aboveground from underground storage and identify the fuel’s use, capacity, construction, and dispensing arrangement.
- Confirm approvals before work begins. Ask state environmental and fire authorities, along with local fire and building officials, what reviews, permits, and inspections apply before purchase, installation, relocation, modification, or filling.
Keep a written record of the inventory, site assessment, agency contacts, approvals, and operating procedures. That record helps the farm make a defensible applicability decision and gives operators a practical basis for maintaining the storage system.
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