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State Water Board staff unveil broad rewrite of underground storage tank rules to take effect Jan. 1, 2026
Summary
Staff presented a comprehensive rewrite of California Code of Regulations Title 23, Division 3, Chapter 16 covering definitions, construction, inspections, release reporting, closure and corrective action; many changes create new requirements for owners, UPAs and cleanup oversight agencies and set Jan. 1, 2026, as the primary effective date for new installs.
State Water Resources Control Board staff presented a proposed, chapter-wide rewrite of underground storage tank (UST) regulations in California—CCR Title 23, Division 3, Chapter 16—outlining new definitions, recordkeeping obligations, construction and inspection standards, release-reporting requirements, closure rules and corrective-action procedures. Staff said the draft will go before the Board and that many provisions would take effect Jan. 1, 2026.
The rewrite groups rules into 10 Articles: Article 1 (definitions, exemptions, recordkeeping), Article 2 (site-specific variances and optional construction standards), Article 3…
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