Proposed Amended Rule 463 – Organic Liquid Storage

Proposed Amended Rule 463 (PAR 463) updates regulatory requirements for above-ground stationary storage tanks in the South Coast Air Quality Management District that handle organic liquids and gasoline, with the goal of reducing volatile organic compound (VOC) emissions. The rule applies to tanks with a capacity of 75,000 liters or more storing organic liquids, tanks between 950 and 75,000 liters storing gasoline, and any stationary tank in crude oil and natural gas production operations capable of emitting six tons or more of VOC annually. The amendment clarifies that smaller gasoline tanks in the 950 to 75,000 liter range are exempt from periodic optical gas imaging (OGI) inspections due to cost-effectiveness considerations, even though such inspections could theoretically reduce emissions by 5.6 pounds per day. This exemption is justified because the unachieved emissions do not exceed the district’s air quality significance threshold for VOC impacts. PAR 463 introduces an alternative compliance pathway for vapor control on smaller gasoline tanks while maintaining stringent controls for larger tanks and production facility tanks, enhancing regulatory clarity and reducing administrative burdens for stakeholders without compromising overall air quality objectives. The amendment is rooted in the district’s environmental standards and qualifies for a CEQA Common Sense Exemption, affirming that it does not constitute a significant environmental impact. The implementation of PAR 463 is overseen by the South Coast Air Quality Management District, with jurisdiction over Orange County and parts of Los Angeles, Riverside, and San Bernardino counties. The regulation does not involve procurement, delivery of goods, or federal acquisition processes, and therefore contains no contract clauses, pricing data, payment instructions, or contractor-related requirements typically found in federal contracts. No contractors are identified, no delivery schedules or FOB terms apply, and no evaluation factors or certifications are relevant, as this is a regulatory change rather than a procurement action. Administrative responsibilities fall to the district, with key contacts including Jennifer Wang for PAR 463 coordination and Farzaneh Khalaj for CEQA compliance matters. The rule was approved at a public hearing on January 9, 2026, and the amended regulation becomes effective upon formal adoption, with compliance expectations aligned to the district’s operational timeline rather than a fixed contract period. Technical specifications for emissions control derive solely from PAR 463 itself, without reference to external industry or federal standards, and enforcement relies on district oversight rather than third-party inspection or physical acceptance protocols.