Front edge of nitrobenzene spot is 35-50 km from Amur. Length of polluted zone is 160 kilometers, informed representatives of Far East regional center of Russian Emergency Ministry. By their data, in the view of water speed change in Sungari river polluted zone will reach Amur: front edge - on December 15-16, zone of maximum concentration - on December 17-19. Time forecast of polluted zone approach is defined more precisely every day as Chinese experts report the situation. Administration of Habarovsky krai asserted that all necessary measures for safe passing of polluted zone through Habarovsk are taken. On Wednesday another consignment of activated coal for city refinement constructions is delivered to Habarovsk from Perm. Toxic compounds got into Sungari river, which is confluent of Amur, as a result of explosion at Chinese chemical plant in Czilin province on November 13.