The California State Water Resource Control Board ordered the closure of single-walled underground storage tank systems and single-walled product piping at all facilities. The deadline to remove all single-walled underground storage tanks and single-walled piping is December 31, 2025.
Underground storage tanks recognized as out of compliance will be subject to enforcement actions beginning January 1, 2026.
Grants and loans may be available to eligible small business owners who want to remove, replace, or upgrade USTs.
The professionals at SCS Engineers are ready to assist with closing and removing underground storage tanks. SCS Engineers provides turnkey services, including licensed tank removal contractors, consulting services for agency compliance, and California-certified analytical testing laboratories.
SCS’s National UST Practice Covers:
Contact a UST professional at SCS Engineers today at ; for service in California, click here.
For information on the EPA Federal program, click here.
Additional California Code Information:
Health and Safety Code – HSC
DIVISION 20. MISCELLANEOUS HEALTH AND SAFETY PROVISIONS [24000 – 26275] ( Division 20 enacted by Stats. 1939, Ch. 60. )
CHAPTER 6.7. Underground Storage of Hazardous Substances [25280 – 25299.8] ( Chapter 6.7 added by Stats. 1983, Ch. 1046, Sec. 3. )
25292.05.
(a) On or before December 31, 2025, the owner or operator of an underground storage tank shall permanently close that underground storage tank in accordance with Section 25298 and the regulations adopted pursuant to that section, if the underground storage tank meets either of the following conditions:
(1) The underground storage tank is designed and constructed in accordance with paragraph (7) of subdivision (a) of Section 25291 and does not meet the requirements of paragraphs (1) to (6), inclusive, of subdivision (a) of Section 25291.
(2) The underground storage tank was installed on or before January 1, 1984, and does not meet the requirements of paragraphs (1) to (6), inclusive, of subdivision (a) of Section 25291.
(b) Notwithstanding subdivision (a), the board may adopt regulations to require the owner or operator of an underground storage tank to permanently close that underground storage tank before December 31, 2025, in accordance with Section 25298 and the regulations adopted pursuant to that section, if the underground storage tank meets the conditions specified in either paragraph (1) or (2) of subdivision (a) and the underground storage tank poses a high threat to water quality or public health. The board shall consult with stakeholders before adopting regulations pursuant to this subdivision.
(Added by Stats. 2014, Ch. 547, Sec. 1. (SB 445) Effective September 25, 2014.)
