California AST requirements: APSA, CUPA, CERS, and fire-code review

Project sequence

California is a layered AST state

California adds a state petroleum-storage program on top of the federal SPCC framework. The Aboveground Petroleum Storage Act, or APSA, is administered locally through Unified Program Agencies. That means the practical regulator may be a county, city, fire department, or other certified local agency rather than one statewide permit counter.

The 2025 California Building Standards Code is effective January 1, 2026, and Part 9 is the California Fire Code. Fire-code review and local amendments still matter in addition to APSA.

APSA applicability is broader than a simple SPCC shortcut

CAL FIRE OSFM says a tank facility can be regulated under APSA if it is subject to federal SPCC, if total aboveground petroleum capacity reaches 1,320 gallons, or in certain cases involving tanks in underground areas. Capacity calculations generally include petroleum containers of 55 gallons or more unless an APSA exclusion applies.

This is an important distinction: federal SPCC itself also requires a reasonable expectation of discharge to navigable waters or adjoining shorelines. APSA has its own applicability language, so a buyer should not assume that failing one federal test automatically ends the California inquiry.

CERS, Tank Facility Statements, and the local UPA

APSA facilities use California's reporting structure through CERS and the Unified Program. Depending on the facility's reporting obligations, an HMBP can satisfy the Tank Facility Statement requirement, or a separate Tank Facility Statement may be required. OSFM also notes that the local UPA may impose additional requirements.

For project planning, identify the CUPA or other UPA early. Fees, inspection practice, local forms, and review timing can vary by jurisdiction.

Gasoline adds a separate CARB conversation

CARB maintains vapor-recovery requirements for gasoline dispensing facilities equipped with aboveground storage tanks. CARB's current FAQ tells owners to consult the local air district and states that ASTs storing diesel or jet fuel are not required to have vapor-recovery systems under that program.

That does not mean a diesel project has no air-quality or generator permitting issues. It means the specific gasoline AST vapor-recovery program should not be casually applied to diesel or jet-fuel tanks.

Buyer implication

For a typical diesel AST, the useful sequence is: confirm APSA applicability, identify the local Unified Program Agency, confirm the current fire-code and local AHJ requirements, then verify the tank listing, containment, siting, venting, dispensing, and SPCC obligations for the actual facility.

Example: multi-tank contractor fueling yard

In California, document all petroleum-containing aboveground tanks at the facility, their capacities and intended uses before assuming one individual tank determines APSA applicability. Identify the local Unified Program Agency, evaluate CERS and Tank Facility Statement obligations, and separately address the California Fire Code and any gasoline vapor-recovery requirements. Confirm which operator will maintain reporting and inspection records.

Questions to answer before ordering

• Which CUPA or other Unified Program Agency has jurisdiction over the site?
• Does the facility meet APSA applicability criteria, including 55-gallon container counting rules and TIUGA provisions?
• Does federal SPCC apply to the facility based on all federal tests, not capacity alone?
• What California Fire Code and local amendments does the fire AHJ apply?
• Is the project gasoline dispensing, diesel, jet fuel, or another product?
• Does a local air district permit or CARB-certified vapor-recovery system apply?

Primary and official sources

• CAL FIRE OSFM: Is My Facility Regulated Under APSA
• CAL FIRE OSFM: Preparing an APSA Submittal in CERS
• CAL FIRE OSFM: Tank Facility Statement Reporting
• CalEPA: About the Unified Program
• California Building Standards Commission: 2025 Title 24 Codes
• California Air Resources Board: AST Gasoline Vapor Recovery FAQ
• U.S. EPA: Does SPCC Apply to Your Facility?