The scope consists of management of the concession contract for actions in Zone P2 of the Comprehensive Purification Plan for the Aragon Pyrenees Region, both in the phase of drafting the design and execution of the work (time periods, administrative procedures, quality, health and safety, environmental formalities). Altogether, there are 58 actions pertaining to the same number of urban nuclei in 17 municipalities, with a population equivalent varying between 20 and 15,000. The total PE for all of them is 42,540. Key actions include Escarrilla, El Pueyo, Panticosa, Formigal and Sallent, Biescas and Gavín.