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 No. 083003145T 2025/06/13 Orco Tools and Equipment 2100 Ritchey Street, Santa Ana, CA 92705, Orange County Notice,
    Draft Order,
    Summary     		     
    Case No. 083002179T 2025/06/13 K & G ARCO Station 9472 Katella Avenue, Garden Grove, CA 92804, Orange County Notice,
    Draft Order,
    Summary     		     
    Case No. 5T10000706 2025/06/13 Ralphs Triangle Service 36374 South Lassen Avenue, Huron, Fresno County Notice,
    Draft Order,
    Summary     		     
    Case No. 083000369T 2025/05/09 Shell #8990 8990 Westminster Boulevard, Westminster, Orange County Notice,
    Draft Order,
    Summary     		     
    Case No. 083002016T 2025/05/09 UNOCAL #5356 1913 West Edinger Avenue, Santa Ana, Orange County Notice,
    Draft Order,
    Summary     		     
    Case No. 083000504T 2025/05/09 E-Z Serve #100841 12409 West Edinger Avenue, Santa Ana, Orange County Notice,
    Draft Order,
    Summary     		     
    Case No. 7DODT2278005 2025/05/02 Twentynine Palms MCAGCC IR Site UST 10 (Building 1077) Intersection of Del Valle Drive and Agate Road Notice,
    Draft Order,
    Summary     		     
    Case No. H05549-003 2024/10/18 Oceanside Golf Course 825 Douglas Drive, Oceanside, San Diego County Notice,
    Draft Order,
    Summary