You have an air permit to operate equipment at your facility. The equipment has flexibility in terms of what raw materials can be used (e.g., a coating line can use different coatings and does depending on the part that is being painted). You may believe that this change doesn’t require an evaluation beyond looking at your permit-to-install (PTI) and making sure that the existing emission limits are not going to be exceeded as a result of the change. For instance, say you ha