Proceedings of the International scientific and practical conference ―Cambridge Science and Education Conference‖ (May 15-17, 2026) / Publisher website: www.naukainfo.com. - Cambridge, United Kingdom, 2026. - 429 p.

109 hazardous substances is the key to correct and effective actions and decisions at the initial stage of the occurrence and development of an accident. The primary task is to quickly identify hazardous chemicals substances and determine the type of threat, possible hazards, and scale. Identifying the danger zone, isolating it, and evacuating it will help to avoid an increase in the number of victims and establish control over the situation. When an event identified as HCS event, it is necessary to determine the extent of the consequences - the number of victims and the necessary medical and sanitary measures. Providing medical care to victims in areas of chemical contamination is one of the key elements of the overall emergency response system. Decontamination is the process of carrying out medical and sanitary measures to remove chemical agents from the surface of the human body that may pose a risk to public health [3, 4]. Decontamination carried out outside the contaminated area. An incident involving the use of chemical warfare agents will be much more dangerous and will have significant consequences compared to an industrial accident with hazardous chemicals substances. Timely recognition of such an incident can save hundreds of lives. At first, it will have similar initial signs of industrial hazardous chemicals substances emissions. The attention should be paid to the availability of information about the threat of a terrorist attack, detected objects similar to improvised explosive devices, and the presence of used protective equipment. A zone of possible damage is a separate territory in which, as the result of an emergency or dangerous event, there is a threat to the life or health of people and damage to property [1]. Initial response to a hazardous chemicals substances release emergency involves zoning the scene. The area immediately surrounding the HCS release (outflow) is a hot zone (Figure 1). It requires immediate evacuation of victims and the public. Personal protective equipment must comply with the highest protection class for the specific substance. The area with reduced pollution called the warm zone. The