The guidebook provides a basic primer to assist you in determining whether your business requires an air pollution control permit or registration from the Bureau of Air. Figuring out whether or not a permit or registration is needed has been confusing and frustrating to many small businesses. While this document is intended to help explain how to make this determination, it does not provide a definitive answer for every person or facility. Permit decisions can be complex matters and situations requiring interpretation and assistance can arise. After the reading the guidebook, you may have questions about your need to acquire a permit or registration. The Illinois Small Business Environmental Assistance Program is available to answer your questions and you may contact the program at 800-252-3998 or at email@example.com.