On October 6, special tactics drill, which was planned within All-Russian drill on civil defense, with forces of permanent readiness and rescue team of radioactive and chemical protection No. 2 at an object of JSC “Nizhnekamskneftekhim”. According to the drill’s idea, as a result a chlorine vessel depressurizing, there was an emission of 2 tons of poisonous substance to the natural environment. As a result of this, zone of chemical contamination appeared, spreading in the direction of residential buildings. Conditionally 17 people were injured. All services did their tasks smoothly and efficiently, and got “good” mark.