The American Association for Respiratory Care (AARC) will continue to be the leading national and international professional association for respiratory care. The AARC will encourage and promote professional excellence, advance the science and practice of respiratory care, and serve as an advocate for patients, their families, the public, the profession and the respiratory therapist.
TWA redirects here. For other uses, see TWA (disambiguation). Trans World Airlines (TWA) was a major American airline from 1924 until 2001. It was formed as Transcontinental & Western Air to operate a route from New York City to Los Angeles via St. Louis, Kansas City, and other stops, with Ford Trimotors.
The following exposure standard has been established by. The Australian Safety and Compensation Council (ASCC); Disodium Tetraborate. Pentahydrate (Borax Pentahydrate) CAS 12179-04-3: TWA = 1mg/m3 NOTE: The exposure. value at the TWA is the average airborne concentration of a particular substance when. calculated over a normal 8 hour working day for a 5day working week.