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State Water Board adopts rewrite of underground storage tank regulations; staff to post guidance and outreach planned
Summary
The board unanimously adopted a comprehensive rewrite of Chapter 16 (Title 23) UST regulations to modernize language, phase out outdated equipment, require interstitial piping monitoring and streamline oversight; staff said outreach and webinars will follow.
The State Water Resources Control Board on Sept. 3 adopted a comprehensive rewrite of underground storage tank (UST) regulations in Chapter 16, Title 23, with the rulemaking intended to modernize structure, remove references to single‑wall USTs (prohibited by law), allow flexibility for emerging technologies, and require periodic interstitial monitoring for secondary containment systems.
Tom Henderson, manager of the UST leak prevention unit, said the rewrite reorganizes decades of incremental amendments into a clearer structure and aligns the regulation with an impending single‑wall UST closure mandated by the Health and Safety Code. Henderson said the rewrite will eliminate prescriptive test and construction methods in…
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