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.
Tips & Warnings. 1  Change your filter at least every 90 days. This will keep your airflow at adequate levels. 2  If you have pets, check all your return air registers to see if they are clogged by pet hair. 3  If cutting into sheet metal plenum, be careful not to puncture your evaporator coil.