Marissa from Denver writes
If I ventilate after 4 hours, how long do I need to stay away?
Allow 12 hours before re entering the Trinity TR treated area. Early entry is permitted after 4 hours to perform short term activities such as ventilation procedures as long as PPE is worn. You can ventilate the area after 4 hours using fans, mechanical ventilating systems, or by vents, windows or other passive ventilation. With no ventilation, allow 12 hours
Answer last updated on: 01/14/2016
