Regulatory agencies conduct both scheduled and unannounced inspections of air quality facilities. To prepare, facilities should thoroughly review all operating permits and records, conduct a pre-inspection of the plant and equipment, and have knowledgeable staff available during the inspection. Facilities should be cooperative, well-organized, and able to provide any requested records or information to make the inspection go as smoothly as possible. Unscheduled inspections often follow issues like notices of violation or ongoing new construction, so facilities should always be prepared for a potential surprise inspection.