Hygienic evaluation of objects concerning extraction, preparation and primary processing of oil, considering health risk parameters.

The authors presented results of hygienic evaluation of ambient air quality in area influenced by oil extraction wells, primary oil processing devices, squeeze stations and other oil extraction objects, using criteria - adherence to hygienic requirements and allowable risk levels for public health. Findings are that due to substantial technologic, organizational changes and innovations in oil extraction industry chamicals content of air at MAC levels and allowable levels of inhalation risk in acute and chronic exposure for majority of the objects studied are reached on considerably shorter distances from industrial area, than it is preset by actual sanitary rules and regulations. Levels of hygienic safety at the objects indicate possible revision of sanitary classification toward reducing the size of approximate sanitary protective zones.

[Evaluating exposure of population to dust, with consideration of components and dispersion contents of industrial discharges from enterprise extracting and processing mineral raw materials (discussion)].

The article covers results of study concerning disperse content of solid components of discharges from main dust- generating technologic operations in extraction and processing of mineral raw materials (pouring ore to conveyor, drying with combustion gas in fluid-bed, pouring of end product, sorting ore on riddle, drying on vibration dry and cool device, etc). Findings are that fractions under 10 and 2.5 micrometers approach 50% in general structure of dust discharges.

[Composition of the dust for the assessment of the exposure to the population in the areas of influence of industrial emissions of stationary sources].

The results of instrumental studies of the dispersion and component composition of the solid component of the dust gaseous emissions from industrial stationary sources of engineering and metallurgical enterprises are presented. Dust and gas mixtures were established to contain up to 80% fractions with a particle size less than 10 microns (PM10), and 40% of fractions with size smaller than 2.5 microns (PM2.

[Fractional and component composition of dust in the air of workplace at machinery enterprise].

The authors present results of assessment of fractional and component composition of dust entering workplace of machinery enterprises. The results prove topicality of data accumulation on actual contents of dusts for more reliable and precise evaluation of the dusts mixture influence on the workers' health.