Air toxics are becoming an important environmental concern for many source categories. Air toxics can involve all media. Being able to evaluate all primary and lower order impacts is becoming part of various permitting and operating activities as well. RTP staff have experience in monitoring ambient air toxics, source emission inventories, evaluating control technologies, preparing permit applications, reviewing process operations, and performing reporting and recordkeeping compliance activities. Each source has specific characteristics that need to be assessed to determine the applicable regulatory requirements. Because of the unique problems posed by air toxics, we recommend that you contact your nearest RTP office to obtain information on addressing your individual project issues.