SPCC plans, secondary containment, dyed vs. clear diesel, DEF, and spill reporting — what actually applies to a jobsite fuel tank, and the myths that trip people up. We handle the compliance side so you don't have to.
The federal SPCC rule (EPA, 40 CFR 112) — Spill Prevention, Control & Countermeasure — applies to most sites that store oil (diesel, gasoline, hydraulic and lube oils all count) and could reasonably spill into a waterway.
Two counting rules surprise people:
A single 1,000-gallon tank plus a couple of 55-gallon drums already crosses the line — so a lot of jobsites are in scope without realizing it. Vehicle fuel tanks ("motive power") are excluded from the count.
Your calculator flags this automatically: once your combined tanks pass 1,320 gallons, you'll see an SPCC notice. State programs can add their own tank-registration and containment rules — verify locally.
Bulk tanks need containment sized to catch the fuel if the tank fails: it must hold the full volume of the largest tank plus room for rainfall. In practice that's engineered at about 110% of the largest tank, and some states codify 110% exactly. Containment can be a lined berm/dike around a single-wall tank, or built into a double-wall tank. Transfer points and fuel trucks also need general containment — drip pans, spill kits, curbing.
| Standard | What it is | Best for |
|---|---|---|
| UL-142 | Standard steel aboveground tank, single- or double-wall. Single-wall needs a separate berm/containment to meet SPCC. | General jobsite storage with containment. |
| UL-2085 | "Protected" tank: built-in double-wall containment plus a 2-hour fire rating and impact resistance. | Tight, high-traffic, or fire-exposed sites — and usually qualifies for shorter setback distances. |
Both single-wall-plus-containment and double-wall satisfy the rules. Double-wall (UL-142 DW or UL-2085) builds the containment in, which is why it's the simpler choice on most sites.
Permits and setback distances from buildings and property lines are set by your local fire marshal / AHJ under NFPA 30 and the fire code — these vary by tank size and location, so always verify locally before placing a tank.
They're the same fuel chemically — the red dye just marks the tax status.
If you run taxed clear diesel in off-road equipment, you can reclaim the federal excise tax with IRS Form 4136 (keep your logs). State rules and penalties vary — verify locally.
Tier 4 diesels use DEF in their emissions system, at roughly 2–3% of diesel volume. Handling basics:
Any oil spill that reaches water and leaves a visible sheen must be reported to the National Response Center at (800) 424-8802 — it's triggered by the sheen, not a gallon amount. Larger discharges (over 1,000 gallons to water in one event, or two spills over 42 gallons within a year) also require notice to your EPA region. The facility owner stays legally responsible; a good fuel supplier reduces the risk with trained delivery, spill kits at the transfer point, and compliant tanks.
Right-sized tanks, containment, labeling, and DEF on schedule — set up so your site stays compliant and never runs dry.
Talk to Tiber Fuel →This page is general information, not legal advice. Federal figures are current as of EPA/IRS sources (2025–26). State tax rates, tank registration, permitting, and setback rules vary — confirm with your local authority having jurisdiction before you build or store fuel.