How should a building that was exposed to CS be decontaminated?

To effectively decontaminate a building exposed to CS (tear gas), it is crucial to heat the building and then ventilate it. Heating the building helps to volatilize any remaining CS particles, making them easier to remove from the space. Once the contaminants are heated and in a gaseous state, proper ventilation is essential to allow fresh air to circulate and flush out the harmful agents. This method is effective because it utilizes both thermal and airflow principles to ensure that any residual chemical is adequately eliminated from the environment.

Other strategies, such as leaving the building unventilated, cooling it to low temperatures, or sealing it for extended periods, are not effective for CS decontamination. Sealing the building or cooling it can trap harmful substances inside, prolonging exposure and potentially causing health risks for anyone who might enter the space later. Therefore, heating followed by thorough ventilation is the most effective and safest method for decontaminating a building after exposure to CS.