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.
For most spas under halogen treatment (chlorine or bromine), I recommend that the spa filter cartridge be replaced every 12-24 months, depending on itâs size, and on how much the spa is used. For those who wish to go chlorine free in the spa or hot tub, Iâd recommend that you double the frequency, and replace your spa filter every 6-12 months.