TY JOUR TI IMPROVING THE METHODOLOGY OF PREDICTING TOXIC CONTAMINATION ZONES IN CASES OF FIRE AT SOLID MUNICIPAL WASTE LANDFILLS KW solid municipal waste KW hazardous chemicals KW toxic air contamination zone KW concentration of hazardous chemicals KW threshold contamination depth JO Problems of risk management in the technosphere AU Savchuk, O.N. PY 2023 IS 2023 PB Saint-Petersburg University of State Fire Service of Emercom of Russia