Underground Storage Tank

OWNERS/OPERATORS OF SINGLE-WALLED USTS

IMPORTANT INFORMATION: Single-walled underground storage tanks (USTs) must be permanently closed by December 31, 2025. This requirement includes both single-walled tanks and nonexempt single-walled piping per California Health and Safety Code, chapter 6.7, section 25292.05. Single-walled UST systems that are not permanently closed by December 31, 2025 will be out of compliance and cannot be operated. Owners and/or operators will be subject to enforcement actions, including affixing red tags and pursuing civil penalties beginning January 1, 2026. For more information, please see the following Single Walled webpage.

Proposed Closure of Underground Storage Tank (UST) Cases

UST cases that are being considered for closure by either the State Water Resources Control Board or the Executive Director have been posted for a 60-day public comment period. (shown in the tables below) Comments will be accepted consistent with deadlines stated in the notice for each case.

UST Case Closures being proposed for consideration by the State Water Resources Control Board (State Water Board) at a future board meeting are listed below.

These are primarily UST cases that meet closure criteria under the decisional framework in State Water Board Resolution No. 92-49 and other Board orders.

List of Case Closures Proposed for Consideration by the State Water Resources Control Board (first table below)

Note: Email comments for the above Case Closures to: commentletters@waterboards.ca.gov

UST Case Closures proposed for consideration by the Executive Director pursuant to State Water Board Resolution No. 2012-0061.

These are cases that meet the criteria of the Low-Threat UST Case Closure Policy. After the comment period, if the Executive Director determines that a case should be considered by the State Water Board, it will be noticed for a future board meeting.

List of Case Closures Proposed for Consideration by the Executive Director (second table below)

Note: Email comments for the above Case Closures to: USTClosuresComments@waterboards.ca.gov.

UST Case Closure Review Denials and Approved Orders.

List of Closure Review Denials and Approved Orders

UST Case Closure Proposed For Consideration by the State Water Resources Control Board

UST Case Closure Proposed For Consideration by the State Water Resources Control Board
Claim No. / Case No.
(Sortable)
Deadline to Receive Comments
12 Noon
(year/mo/day)
(Sortable)
Site Name
(Sortable)
Site Address
(Sortable)
Documents
(Not Sortable)
Written Comments Received
(Sortable)
Orders
(Sortable)
Uniform Closure Letter Signed
               

UST Case Closure Proposed For Consideration by the Executive Director

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UST Case Closure Proposed For Consideration by the Executive Director
Claim No. / Case No.
(Sortable)
Deadline to Receive Comments
12 Noon
(year/mo/day)
(Sortable)
Site Name
(Sortable)
Site Address
(Sortable)
Documents
(Not Sortable)
Written Comments Received
(Sortable)
Closure Denials and Approved Orders
Closure Cases Approved/Denied Page
Uniform Closure Letter Signed
Closure Cases Approved/Denied Page
Case Nos. 48S0055 & 48S0056 2024/04/19 Former Solano County Records Building & 721-729 Texas Street 701 & 721-729 Texas Street, Fairfield, CA 94533 Notice,
Draft Order,
Summary