[Hygienic assessment of labor conditions in chemical industry sites during reconstruction].

In periods of reconstruction of chemical enterprises, hazardous compounds concentrations may exceed MAC, they are also characterized by contamination of the skin with toxic substances, welding aerosols discharge into the working zone, and microclimate distabilization. The workers' health states display functional shifts with concomitant decrease of labour productivity, increase heart rates, a higher 11-oxycorticosteroids contents in saliva and peroxidase activity. Morbidity with temporary disability also increases. A range of health improving measures is needed to be performed at the stages of preventive sanitary control.