ABSTRACT
One of the most significant parts of the 1990 Clean Air Act (CAA) Amendments is a new general operating permit program established in Title V of this act. The operating permit program will require about 30,000 major sources of regulated pollutants to submit permit applications and may eventually require hundreds of thousands of smaller sources eventually to do likewise. To cover cost of processing these applications at the state agencies, a permit fee is incorporated. Health risk assessments and air dispersion modeling play a key role in various provisions of the CAA Amendments of 1990. These regulations represent the first major federal requirement to assess public health risk associated with industrial source emissions. It is anticipated that the methodology established in these regulations will be used as a basis for the residual risk standards required by the new air toxics program.
