On a lot of 110 x 70 m2 there is an industrial hall size 53 x 11.7 m. There are three reservoirs with technical gases of 1000 m3 each on the right side of the hall. The equipment in the hall is connected with the reservoirs by metal tubes. They have a common safety valve outside. In case of the gas leaking in the hall, it is possible to stop the flow of the gas by turning the safety valve outside.