Liquid storage areas where dispensing is conducted must have either a gravity ventilation system or a continuous mechanical exhaust ventilation system. If the dispensing involves Class I liquids (e.g. Category 1 & 2 liquids per OSHA terminology) mechanical ventilation is the ONLY acceptable option. Regardless of the type used there are some FUNDAMENTAL requirements that NFPA has established in their 2021 edition of NFPA 30 – Flammable and Combustible Liquids Code.
First my cheat sheet on keeping NFPA’s Flammable Classes and OSHA’s Flammable Categories straight: