8.30. The operating organization must monitor the temperature, humidity and pollution by chemicals and microorganisms of the air environment, checking the performance of ventilation systems and multiplicity of air exchange in the main functional rooms: operating rooms, post-operative, delivery, intensive care wards, physical therapy departments, rooms for storage of potent and poisonous substances, pharmacy warehouses, rooms for the preparation of medicines, laboratories, special rooms, etc. The results of the control should be documented by the act kept in the institution.