A central element to implement the IPPC-Directive (Council Directive 96/61/EC) consists in the information exchange on an European level on the “Best Available Techniques” BAT for all industrial activities listed in Annex 1 of the Directive. Technical Working Groups (TWG) are set up to facilitate the exchange of information under Article 16.2 of the Directive. The first TWG on large combustion plants (LCP - combustion installations with a rated thermal input exceeding 50 MW) was held on 24 and 25 February 2000 at the European IPPC Bureau (EIPPCB) in Sevilla. The aim of this working group is the elaborate a Reference Document on BAT (here: BREF) for this sector.