Respirator Fit Testing Requirements & Demo – On the Job Safety Tips with SAFEX – Special Thanks to SAFEX for assisting with this Video!! Contact them directly with any safety related questions on the topic. – For additional links and info on the OSHA standard Appendix A to § 1910.134: Fit Testing Procedures. This is a very serious topic and there are a lot of factors to be concerned with we hope to draw attention to in this series, always consult a safety professional when it comes to personal or employee safety.