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.
How often should I change the antifreeze in my car? A. It depends on the age of your vehicle, the type of coolant (antifreeze) in the cooling system and how many miles a year you drive. All late model vehicles (with a couple of minor exceptions) are factory-filled with ethylene glycol-based antifreeze.