Aboveground Storage Tank Requirements in Wyoming

Federal SPCC baseline

The federal SPCC rule (40 CFR Part 112) applies to non-transportation-related facilities storing oil aboveground above regulatory thresholds. As a general rule, a facility with more than 1,320 gallons of aggregate aboveground oil storage capacity — counting every container 55 gallons or larger — falls within SPCC's scope. Facilities that trigger SPCC must develop a written Spill Prevention, Control, and Countermeasure Plan, meet secondary containment requirements, and in many cases certify the plan through a licensed Professional Engineer.

In Wyoming's energy-heavy operating environment, tank density on a single site often makes this a multi-tank system question rather than a single-tank one — aggregate capacity across a manifolded system crosses SPCC thresholds faster than buyers coming from lighter-demand states typically expect.

Wyoming's state AST rules are narrower than you'd expect

This is worth knowing precisely: Wyoming's dedicated aboveground storage tank regulations (under W.S. 35-11-1415) apply specifically to aboveground tank systems used by a dealer to dispense gasoline or diesel to the public — retail fueling, in other words. For industrial, commercial, and most oilfield-support tanks that aren't public-facing dispensing operations, that state-specific AST chapter generally doesn't apply directly. Wyoming DEQ's Storage Tank Program is primarily built around underground storage tanks, not general AST oversight.

That means for most of the tanks you'll be sourcing across this territory, the operative requirements come from two other places: OSHA (29 CFR 1910.106) if the tank holds flammable or combustible liquids — a worker-safety framework, not an environmental one — and the local fire code adopted by the county or municipality where the site sits, typically the International Fire Code referencing NFPA 30/30A (and NFPA 58 for LPG).

What local review can involve

Local requirements vary by county — Teton County, for example, requires compliance with the current International Fire Code and applicable NFPA standards, building department permitting prior to installation, a Fire Department inspection before the tank is covered or backfilled, and coordination with the Planning and Engineering Departments (including a Floodplain Development Permit) if the site sits within a 100-year floodplain. Not every Wyoming county runs an identical process, but this is representative of the layers worth checking early: fire code compliance, building department permit, fire department inspection, and floodplain review where applicable.

Common mistakes we see in Wyoming projects

Typical permitting process

Requirements vary significantly by county in Wyoming. Confirm current requirements with your local fire authority and building department.

Quick Facts — Wyoming

Why does Wyoming often need multi-tank systems?

High energy-sector fuel demand on a single site frequently exceeds what a single tank can efficiently support, making manifolded multi-tank systems common.

Does Wyoming DEQ regulate my industrial AST directly?

Generally no. Wyoming's dedicated AST statute applies to tanks dispensing fuel to the public; most industrial and oilfield-support tanks route through OSHA (if flammable/combustible) and local fire code instead.

Does the fire authority get involved in energy-sector tank installs?

Yes — the local fire authority and building department review tank listing, containment, and siting under the locally adopted fire code regardless of industry.

Is floodplain review required for Wyoming tank installations?

It can be, depending on the county and whether the site sits within a mapped floodplain — confirm with the local planning or engineering department early in siting.