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.
There are a lot of people would would just say to replace shocks/struts at certain intervals. I.e. a Merchants shop would probably tell you to replace them every 60-80K miles or so just on principle. As such, they'd tell you that at 110K you're overdue regardless of anything else (like leaking or handling...)