The OSHA Standard 1910.134 (1998) requires fit testing of all respirators including those with positive pressure. The respirator fit test is done to check that the mask size and mask model chosen fits the face. The fit test confirms that the mask fits the wearer's face and that there is minimal air leakage between the face and the mask. <BR> <BR>A respirator medical evaluation (questionnaire) conducted within the last 12 months by a qualified Licensed Healthcare Practitioner (LHP) or physician.<BR>RESPIRATOR FIT TESTING<BR>