During work, employees may be exposed to adverse effects of various kinds such as high noise levels, unhealthy temperatures, electromagnetic fields and more. The main normative document providing information on the requirements and possibilities for limiting the harmful factors is Ordinance № 7 on minimum health and safety of the workplace and the use of work equipment, 1999. In addition to this regulation, where applicable, there are additional regulations determining the permissible and healthy standards for work.
We can divide the factors into several groups: physical factors, microclimate factors, chemical factors, biological factors, physiological factors and mental factors.
The most common measurements required for the factors in question are: measurements of light, microclimate, noise, vibration and periodic checks of: Impedance of “Phase-protective conductor” circuit, earthing system and lightning protection system.
The measurements are performed by units / specialists authorized by the Executive Agency "Bulgarian Accreditation Service".