Qualitative Fit Test (QLFT)
A QLFT is a pass/fail fit test which assesses the adequacy of respirator fit based on the individuals response to a test media. A QLFT may be used for all tight fitting, negative pressure face-pieces which will be used in atmospheres up to 10 times for the OSHA PEL. As part of conducting the fit test, technicians will train employees as listed below. QLFT is conducted using 3M™ or Gerson® Fit Test Kits, and the test agent Saccharin Solution Aerosol or Bitrex™ Solution Aerosol.
Quantitative Fit Test (QNFT)
A QNFT is an assessment of the adequacy of fit by numerically measuring the amount of leakage into the respirator. A QNFT is required for all negative pressure full-face and half-face respirators that are to be used in atmospheres greater than 10 times the OSHA PEL. Our standard QNFT method uses an Ambient Aerosol Condensation Nuclei Counter (TSI PORTACOUNT™). A fit factor of >500 will be considered a pass for full face piece respirators unless you prefer a higher minimum number. As part of conducting the fit test, technicians will train employees as listed below.
- All employees to be fit tested must be clean shaven, mustaches are ok as long as they do not interfere with the valves
- All fit testing equipment and supplies, other than the respirators, are provided by National Fit Testing Services
- Primary and back-up respirators must be in stock for fit testing and provided by the customer
- Respirator medical evaluations must be completed prior to fit testing
- Why the respirator is necessary and how improper fit, usage, or maintenance can compromise the protective effect of the respirator
- What the limitations and capabilities are of the respirator
- How to use the respirator effectively in emergency situations, including situations in which the respirator malfunctions
- Donning and Doffing
- User Seal Check
- Maintenance and storage of the respirator
- How to recognize medical signs and symptoms that may limit or prevent the effective use of the respirators
- Any additional policies and procedures specific to your organization