Integrated Pollution Control (IPC) was introduced by the Environmental Protection Act 1990 to cover prescribed processes. Those within Part A are potentially the most polluting processes and are under Environment Agency Control with less polluting processes (Part B) covered by local authority air pollution control (LAAPC). Authorisations are required for carrying on IPC and LAAPC processes. Applicants must demonstrate that they apply Best Available Techniques Not Entailing Excessive Costs (BATNEEC) including technical means, training, and supervision and site construction, lay-out and maintenance. The Best Practical Environmental Option (BPEO) must also be observed in the case of releases from IPC processes. This criterion requires that the release be made on the basis of what is best for the environment as a whole.