|1||1999 - 01/29/1999 - Using combinations of respiratory protection not approved by NIOSH.|
|2||1997 - 07/01/1997 - NIOSH approved respirator during the period of an employee's escape from a chemical release of phosgene.|
|3||1997 - 06/20/1997 - SCBA cylinder interchangeability.|
|4||1991 - 01/24/1991 - Use of non-approved respirators and improper use of approved respirators|
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