Oil-filled equipment capacity

When counting against the 1,320 aboveground storage capacity threshold, would operational storage of oil (such as in a hydraulic press) be used?

Oil which is contained in equipment is required to be factored into the storage capacity for the facility even though the oil may be only used for ancillary purposes.  If the piece of equipment is not capable of holding 55 gallons or more of oil and is only capable of holding less than 55 gallons of oil, that amount of oil in that piece of equipment does not have to counted toward the 1,320 gallon threshold by virtue of the de minimis container size exemption provided in the rule.