Gas Cylinder Safety Guidelines

18 Gas Cylinder Safety Guidelines Toxic and Highly Toxic Gases Common toxic or highly toxic gases are listed in Appendix II. • Some gases, depending on their toxicity and expandable quantities, must be stored in a continuously ventilated gas cabinet, fume hood or other enclosure. Storage quantities are listed in Storage Section, Table 1 . • Small quantities (lecture cylinders), or dilute concentrations of these gases may be stored outside of a ventilated enclosure with prior approval of EH&S or Ames Laboratory ESH. • Use audible airflow alarms in ventilated hoods or gas cabinets that are dedicated to toxic gas usage or storage. • Standard operating procedures for processes that use corrosive, toxic or highly toxic gases must be developed and include emergency response actions. All affected personnel must be trained on these procedures.