Signs of hazardous production facilities are:

1. production, use, processing, formation, storage, transportation, destruction of at least one of the following hazardous substances:
   
   • source of ionizing radiation;
   • flammable substance – a gas that becomes flammable at normal pressure and when mixed with air and whose boiling point at normal pressure is 20 degrees Celsius or lower;
   • explosive – a substance that, under certain types of external influence, is capable of a rapid self-propagating chemical transformation with the release of heat and the formation of gases;
   • combustible substance – liquid, gas capable of spontaneous combustion, as well as ignite from an ignition source and burn independently after its removal;
   • oxidizing substance – a substance that supports combustion, causes ignition and (or) contributes to the ignition of other substances as a result of a redox exothermic reaction;
   • toxic substance – a substance that, when exposed to living organisms, can lead to their death and has the following characteristics:
   • the average lethal dose when injected into the stomach is from 15 to 200 milligrams per kilogram of body weight, inclusive;
   • the average lethal dose when applied to the skin is from 50 to 400 milligrams per kilogram of body weight, inclusive;
   • the average lethal concentration in the air is from 0.5 to 2 milligrams per liter inclusive;
   • highly toxic substance – a substance that, when exposed to living organisms, can lead to their death and has the following characteristics:
   • the average lethal dose when injected into the stomach is not more than 15 milligrams per kilogram of body weight;
   • the average lethal dose when applied to the skin is not more than 50 milligrams per kilogram of body weight;
   • the average lethal concentration in the air is not more than 0.5 milligrams per liter;
   • substances that pose a danger to the environment, including those characterized in the aquatic environment by the following indicators of acute toxicity:
   • the average lethal dose during inhalation exposure to fish for ninety-six hours is not more than 10 milligrams per liter;
   • the average concentration of the poison, causing a certain effect when exposed to daphnia for forty-eight hours, not more than 10 milligrams per liter;
   • the average inhibitory concentration when exposed to algae for seventy-two hours is not more than 10 milligrams per liter;
2. production of melts of ferrous, non-ferrous, precious metals and alloys based on these metals;
3. conducting mining, geological exploration, drilling, blasting, mining and processing of mineral raw materials, works in underground conditions