Colorado AST requirements: OPS registration, installation review, and local fire code

Project sequence

Colorado has a real state AST program

Colorado's 7 CCR 1101-14 is not just a fire-code reference. It is a dedicated state storage-tank rule administered by the Division of Oil and Public Safety. The rule covers registration, installation, operation, inspections, releases, closure, and financial-responsibility requirements for regulated tank systems.

The 660 to 39,999 gallon band matters

The current rule excludes, with important exceptions, ASTs below 660 gallons and above 39,999 gallons from the core AST regulation. That makes 660 gallons a meaningful Colorado threshold even though federal SPCC's aboveground-capacity threshold is higher and uses an aggregate facility calculation.

Do not use this as a stand-alone eligibility test. The rule includes additional exclusions, definitions, and special requirements for certain motor-fuel dispensing installations.

Installation and registration are separate tasks

The rule requires an application to be submitted and approved before beginning construction on a new or reinstalled regulated AST system. It also requires registration of regulated ASTs, updates after certain changes, and annual renewal. The rule requires 72-hour notice before filling a newly constructed AST system so the state can verify the installation.

Inspection requirements are unusually explicit

Colorado directly incorporates STI SP001 and API 653 as applicable inspection standards for steel ASTs. The rule also requires documented monthly visual inspections and annual visual inspections for steel ASTs, plus periodic inspections based on the selected standard and tank characteristics.

Fire-code adoption still needs a local answer

The dedicated OPS program does not eliminate local fire-code review. Colorado fire-code adoption can vary by jurisdiction, so the city, county, or fire-protection district still needs to be identified before siting and separation requirements are treated as final.

Example: contractor diesel tank and new dispensing equipment

At a Colorado construction yard, identify whether the proposed tank falls within the state's AST program, then distinguish registration from installation approval and inspection planning. Provide a site layout, capacities, product and dispenser configuration to the relevant state program and local fire authority; the tank's listing alone does not finish either review.

Questions to answer before ordering

• Is the tank inside Colorado's regulated AST definitions and capacity band?
• Is the use retail fueling, fleet fueling, bulk storage, generator supply, or another application?
• Has the OPS installation application been approved before construction?
• What annual registration and financial-responsibility requirements apply?
• Which local fire authority has jurisdiction and which code edition/amendments does it enforce?
• What SP001 or API 653 inspection program applies to the specific tank?

What not to assume

• Do not use the 660-gallon threshold as a stand-alone eligibility test without the rule’s definitions and exclusions.
• Do not treat state registration as a substitute for local fire-code approval.
• Do not order before resolving whether OPS installation approval is required for the planned system.
• Do not assume one inspection standard applies identically to every tank configuration.

Primary and official sources

• Colorado Secretary of State: 7 CCR 1101-14, Storage Tank Regulations
• U.S. EPA: Does SPCC Apply to Your Facility?