The air in The Denizen's communal areas is constantly swept and recycled to clean it of outside contamination. For the safety, health and comfort of all residents, pollution monitors have been installed by the reception desk. These will be triggered in the exceptional event that your clothing is contaminated with particles/pollution judged beyond the tolerance level at which the building's mechanisms will be able to clear it in normal operation. If one of these exceptional events occurs, you will be escorted to a private area and asked to remove the affected items of clothing. They will be laundered using a special process and returned to you within 24 hours.