A formal public hearing about a proposed air-quality permit renewal, including requirements and enforcement, takes place from 5 to 6 p.m., Tuesday, Nov. 27, at the Rancho Resort Clubhouse, 15900 S. Rancho Resort Blvd., Sahuarita. The hearing offers an opportunity for the public to speak, or to drop off written comments concerning the permit. Call 243-7400 for more information.