The mixture rule states that any mixture of a listed hazardous waste and a non-hazardous waste remains regulated as a hazardous waste. Mixtures of characteristic wastes and non-hazardous waste are regulated as hazardous waste if the resultant mixture continues to exhibit the characteristic.
1 Wash the cannula in soapy water and rinse it with a solution of 10 parts water and one part vinegar. 2  Rinse thoroughly with hot water and hang to dry.  This connects the nasal cannula to the oxygen concentrator. It doesnât need to be cleaned, but plan to replace it every 6 to 12 months advises the ATS.
CNG Tank Replacements. According to NFPA 52, NGV 2, AND CGA 6.4 standards CNG cylinders must be replaced prior to expiration, every 15 years (see tank label). CNG cylinders may also need to be replaced if any damage has come to the cylinder following a collision, vehicle fire, or due to exposure to excessive heat.