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# Title
 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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