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.
Cars.com photo by Evan Sears. Vehicle maintenance schedules vary on how often the air filter should be changed. On most Chevrolet engines, for example, the recommended interval is every 45,000 miles, but Ford says it should be done every 30,000 miles on many of its engines.