A RCRA hazardous waste is a waste that either appears on one of three lists created by the U.S. Environmental Protection Agency, or, if not on the lists, exhibits one of four characteristics of hazardous waste.
How often should oxygen nasal cannulas be changed? Update: Our supplier recommended we change the cannulas monthly and the tubing every 60-90 days. My father has friends who's suppliers have had different guidelines.
In UK it seems to be most often recommended that oil and oil filter get changed every 10,000 miles or every 12 months, with optional changes between those times. Depending on what car you have, it's possible for even a total noobie to do interim oil and filter servicing, quickly and with a lot of ease.