Underground Storage Tank Closure

Missed The Webinar?

Hit the button to check out the conversation our team had with the California State Water Board regarding the future of UST closures.

Video & Slides

Roohi Toosi, PE

A-Tech Consulting, Inc.

Jay Sandoval, MS, CIH

A-Tech Consulting, Inc.

Patrick Naffah, CIH

A-Tech Consulting, Inc.

Robert Smith

California State Water Board

McLean Reich

California State Water Board

Johnny Wales

Redhorse Corporation


Permanent Closure Requirements for Underground Storage Tank with Single-Walled Components

All regulated USTs that do not meet the requirements of H&SC, section 25291(a)(1)-(6), must be permanently closed on or before December 31, 2025 in accordance with H&SC, section 25298, and the California Code of Regulations, title 23, chapter 16 (UST Regulations), section 2672.

A single-walled UST is either the tank and/or the connected piping which do not have secondary containment and a continuous leak detection system meeting the requirements of H&SC, section 25291(a)(1)-(6). 

UST Systems which do not have secondary containment and a continuous leak detection system that have not been permanently closed by the regulatory due date are out of compliance, cannot be operated, and could be red tagged by the Unified Program Agency (UPA) or the State Water Resources Control Board (State Water Board), preventing fuel deliveries and dispensing. Penalties for systems out of compliance are $500 to $5,000 per day per underground storage tank.

Guidance for the Closure of Single-Walled UST Systems

In order to fully understand what is needed to get your UST in compliance, it is important to know the facts. The below guidance addresses common questions from UST owners and operators. This deck also specifies what actions are necesssaryfor USTs that do not meet necessary requirements.

View Slide Deck
Funding for the Closure of Single-Walled UST Systems

Loans and grants, made available through the Replacing, Removing, or Upgrading Underground Storage Tanks (RUST) Program, can assist eligible small businesses with the costs necessary to remove, replace, or upgrade single-walled USTs. The RUST grants are limited year-to-year, therefore, it is best to utilize these resources as early as possible.

Find Out How
List of Facilities with Single-Walled Tank and/or Piping

Below is a list of facilities with single-walled tanks and/or piping , which must be permanently closed on or before December 31, 2025. The facility list was compiled using data from the California Environmental Reporting System (CERS). The accuracy of the data has not been confirmed by the State Water Board.

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Our Projects

UST Monitoring | Soil Sampling

As a testament to our responsiveness, A-Tech was called upon three days prior to field mobilization for construction activities to conduct environmental oversight and collect confirmation soil samples.

UST Monitoring & Investigation | Asbestos | Lead

A-Tech was retained by the a long time client in Los Angeles, CA to conduct environmental monitoring during removal of a 3,000-gallon USTs.