Since I was able to conduct my very first fit test, I was taught that the Qualitative method was ONLY permitted when the user was wearing an Air Purifying Respirator (APR) which needed a fit factor of 100 or less. When I read 1910.134(f)(6), that is exactly how I read it today… QLFT may only be used to fit test negative pressure air-purifying respirators that must achieve a fit factor of 100 or less. So what in the heck is OSHA up to with the 2008 revisions of the CPL?