In April 2004 the Belgian NCP received a request for review by the NGO Proyecto Gato alleging that Tractebel-Suez had breached the general policies, disclosure and environment provisions of the Guidelines. The request concerned the area where the plant was built and the related displacement of 2,700 people. It also concerned the environmental management of the plant as well as financial issues with local authorities. It should be noted that the plant had been in activity for a number of years when it was taken over by the Belgian company.

After consulting with the parties involved and providing access to conciliation, on 13 September 2005, the NCP issued a public statement (in French) concluding that Tractebel-Suez had correctly observed the Guidelines.