Have a look at the OSHA respirators medical safety standards

Today almost every company follows the OSHA respirators medical safety standards in order to maintain the health as well as safety of the employees in workplaces. OSHA provides significant safety instructions and also conducts numerous educational programs for both small as well as large business organizations. Yes, in order to benefit the employers and employees, OSHA conducts such training programs both at onsite and offsite locations. Moreover, it has developed certain standards to avoid occupational hazards in order to protect the employees working in construction industries. Besides, it is committed to monitor and encourage perpetual improvements in safety standards with a wide network of engineers, physicians, educators, safety inspectors, standards writers and many more.