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.
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