Chemical storage compliance question, do you need a flammable storage cabinet for small quantities of everyday products?

I'm a property manager for a small office building. Our maintenance team keeps aerosol lubricants, spray paint, adhesives, and cleaning products in a utility closet, roughly twenty-five to thirty aerosol cans plus some quart-size solvent containers.

During a recent fire inspection the inspector mentioned we might need an approved flammable storage cabinet depending on the total aggregate quantity of flammable liquids. Those cabinets run anywhere from $500 to $2,000.

I'm not even sure which products are classified as flammable liquids. Some aerosol cans have the GHS flame pictogram, others don't, and I don't know whether aerosols and regular containers are counted separately for maximum allowable quantity calculations.

Before spending money on a cabinet, I want to understand the actual requirement. Do our quantities trigger it, or was the inspector being overly cautious?