EPA defines used oil as any oil that has been refined from crude oil or any synthetic oil that has been used and as a result of such use is contaminated by physical or chemical impurities. Simply put, used oil is exactly what its name implies—any petroleum-based or synthetic oil that has been used.
All waste containers must be stored with secondary containment and protected from the weather. Secondary containment must be kept clear of spills and debris.
Used oil filters, when removed from equipment, can contain up to 20 ounces of oil. All oil filters must be punctured on the dome end and hot drained for 24 hours, or crushed and dismantled. "Hot-drained" means that the filters are drained immediately after being taken off a hot engine. Label the outer container as “Used Oil Filters”.